diff options
Diffstat (limited to 'arch/x86')
108 files changed, 3162 insertions, 1729 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 96e0c2ebc38..03980cb0429 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -447,7 +447,6 @@ config PARAVIRT_DEBUG config MEMTEST bool "Memtest" - depends on X86_64 help This option adds a kernel parameter 'memtest', which allows memtest to be set. diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index abff1b84ed5..54b8c02c71e 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -362,10 +362,6 @@ config X86_ALIGNMENT_16 def_bool y depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1 -config X86_GOOD_APIC - def_bool y - depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON || MCORE2 || MVIAC7 || X86_64 - config X86_INTEL_USERCOPY def_bool y depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON || MCORE2 diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index ae36bfa814e..85a87d2ac0c 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -5,13 +5,15 @@ config TRACE_IRQFLAGS_SUPPORT source "lib/Kconfig.debug" -config NONPROMISC_DEVMEM +config STRICT_DEVMEM bool "Filter access to /dev/mem" help - If this option is left off, you allow userspace access to all + If this option is left on, you allow userspace (root) access to all of memory, including kernel and userspace memory. Accidental access to this is obviously disastrous, but specific access can - be used by people debugging the kernel. + be used by people debugging the kernel. Note that with PAT support + enabled, even in this case there are restrictions on /dev/mem + use due to the cache aliasing requirements. If this option is switched on, the /dev/mem file only allows userspace access to PCI space and the BIOS code and data regions. @@ -287,7 +289,6 @@ config CPA_DEBUG config OPTIMIZE_INLINING bool "Allow gcc to uninline functions marked 'inline'" - depends on BROKEN help This option determines if the kernel forces gcc to inline the functions developers have marked 'inline'. Doing so takes away freedom from gcc to @@ -298,5 +299,7 @@ config OPTIMIZE_INLINING become the default in the future, until then this option is there to test gcc for this. + If unsure, say N. + endmenu diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c index 03399d64013..d93cbc6464d 100644 --- a/arch/x86/boot/edd.c +++ b/arch/x86/boot/edd.c @@ -167,9 +167,8 @@ void query_edd(void) * Scan the BIOS-supported hard disks and query EDD * information... */ - get_edd_info(devno, &ei); - - if (boot_params.eddbuf_entries < EDDMAXNR) { + if (!get_edd_info(devno, &ei) + && boot_params.eddbuf_entries < EDDMAXNR) { memcpy(edp, &ei, sizeof ei); edp++; boot_params.eddbuf_entries++; diff --git a/arch/x86/boot/pm.c b/arch/x86/boot/pm.c index 328956fdb59..85a1cd8a8ff 100644 --- a/arch/x86/boot/pm.c +++ b/arch/x86/boot/pm.c @@ -98,12 +98,6 @@ static void reset_coprocessor(void) /* * Set up the GDT */ -#define GDT_ENTRY(flags, base, limit) \ - (((u64)(base & 0xff000000) << 32) | \ - ((u64)flags << 40) | \ - ((u64)(limit & 0x00ff0000) << 32) | \ - ((u64)(base & 0x00ffffff) << 16) | \ - ((u64)(limit & 0x0000ffff))) struct gdt_ptr { u16 len; diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig index 9bc34e2033e..4d73f53287b 100644 --- a/arch/x86/configs/i386_defconfig +++ b/arch/x86/configs/i386_defconfig @@ -2047,7 +2047,7 @@ CONFIG_PROVIDE_OHCI1394_DMA_INIT=y # CONFIG_SAMPLES is not set # CONFIG_KGDB is not set CONFIG_HAVE_ARCH_KGDB=y -# CONFIG_NONPROMISC_DEVMEM is not set +# CONFIG_STRICT_DEVMEM is not set CONFIG_EARLY_PRINTK=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_DEBUG_STACK_USAGE=y diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig index ae5124e064d..a4045242962 100644 --- a/arch/x86/configs/x86_64_defconfig +++ b/arch/x86/configs/x86_64_defconfig @@ -2012,7 +2012,7 @@ CONFIG_PROVIDE_OHCI1394_DMA_INIT=y # CONFIG_SAMPLES is not set # CONFIG_KGDB is not set CONFIG_HAVE_ARCH_KGDB=y -# CONFIG_NONPROMISC_DEVMEM is not set +# CONFIG_STRICT_DEVMEM is not set CONFIG_EARLY_PRINTK=y CONFIG_DEBUG_STACKOVERFLOW=y CONFIG_DEBUG_STACK_USAGE=y diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c index cb3856a18c8..20af4c79579 100644 --- a/arch/x86/ia32/ia32_signal.c +++ b/arch/x86/ia32/ia32_signal.c @@ -36,6 +36,11 @@ #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) +#define FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \ + X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \ + X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \ + X86_EFLAGS_CF) + asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset); void signal_fault(struct pt_regs *regs, void __user *frame, char *where); @@ -248,7 +253,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs, regs->ss |= 3; err |= __get_user(tmpflags, &sc->flags); - regs->flags = (regs->flags & ~0x40DD5) | (tmpflags & 0x40DD5); + regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS); /* disable syscall checks */ regs->orig_ax = -1; @@ -515,7 +520,6 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, compat_sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *frame; - struct exec_domain *ed = current_thread_info()->exec_domain; void __user *restorer; int err = 0; @@ -538,8 +542,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) goto give_sigsegv; - err |= __put_user((ed && ed->signal_invmap && sig < 32 - ? ed->signal_invmap[sig] : sig), &frame->sig); + err |= __put_user(sig, &frame->sig); err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo); err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc); err |= copy_siginfo_to_user32(&frame->info, info); diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 20371d0635e..23d146ce676 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -37,6 +37,11 @@ movq %rax,R8(%rsp) .endm + /* + * Reload arg registers from stack in case ptrace changed them. + * We don't reload %eax because syscall_trace_enter() returned + * the value it wants us to use in the table lookup. + */ .macro LOAD_ARGS32 offset movl \offset(%rsp),%r11d movl \offset+8(%rsp),%r10d @@ -46,7 +51,6 @@ movl \offset+48(%rsp),%edx movl \offset+56(%rsp),%esi movl \offset+64(%rsp),%edi - movl \offset+72(%rsp),%eax .endm .macro CFI_STARTPROC32 simple @@ -137,13 +141,12 @@ ENTRY(ia32_sysenter_target) .previous GET_THREAD_INFO(%r10) orl $TS_COMPAT,TI_status(%r10) - testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \ - TI_flags(%r10) + testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) CFI_REMEMBER_STATE jnz sysenter_tracesys -sysenter_do_call: cmpl $(IA32_NR_syscalls-1),%eax ja ia32_badsys +sysenter_do_call: IA32_ARG_FIXUP 1 call *ia32_sys_call_table(,%rax,8) movq %rax,RAX-ARGOFFSET(%rsp) @@ -242,8 +245,7 @@ ENTRY(ia32_cstar_target) .previous GET_THREAD_INFO(%r10) orl $TS_COMPAT,TI_status(%r10) - testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \ - TI_flags(%r10) + testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) CFI_REMEMBER_STATE jnz cstar_tracesys cstar_do_call: @@ -321,6 +323,7 @@ ENTRY(ia32_syscall) /*CFI_REL_OFFSET rflags,EFLAGS-RIP*/ /*CFI_REL_OFFSET cs,CS-RIP*/ CFI_REL_OFFSET rip,RIP-RIP + PARAVIRT_ADJUST_EXCEPTION_FRAME SWAPGS /* * No need to follow this irqs on/off section: the syscall @@ -336,8 +339,7 @@ ENTRY(ia32_syscall) SAVE_ARGS 0,0,1 GET_THREAD_INFO(%r10) orl $TS_COMPAT,TI_status(%r10) - testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \ - TI_flags(%r10) + testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10) jnz ia32_tracesys ia32_do_syscall: cmpl $(IA32_NR_syscalls-1),%eax diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index da140611bb5..b78a17b1281 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_OLPC) += olpc.o # 64 bit specific files ifeq ($(CONFIG_X86_64),y) obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o + obj-y += bios_uv.o obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o obj-$(CONFIG_AUDIT) += audit_64.o diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 868de3d5c39..a3ddad18aaa 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -9,6 +9,7 @@ #include <linux/bootmem.h> #include <linux/dmi.h> #include <linux/cpumask.h> +#include <asm/segment.h> #include "realmode/wakeup.h" #include "sleep.h" @@ -23,15 +24,6 @@ static unsigned long acpi_realmode; static char temp_stack[10240]; #endif -/* XXX: this macro should move to asm-x86/segment.h and be shared with the - boot code... */ -#define GDT_ENTRY(flags, base, limit) \ - (((u64)(base & 0xff000000) << 32) | \ - ((u64)flags << 40) | \ - ((u64)(limit & 0x00ff0000) << 32) | \ - ((u64)(base & 0x00ffffff) << 16) | \ - ((u64)(limit & 0x0000ffff))) - /** * acpi_save_state_mem - save kernel state * diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 8c3deb027d3..c25210e6ac8 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -23,7 +23,7 @@ #include <linux/scatterlist.h> #include <linux/iommu-helper.h> #include <asm/proto.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/amd_iommu_types.h> #include <asm/amd_iommu.h> diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 7661b02d720..c9d8ff2eb13 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -25,7 +25,7 @@ #include <asm/pci-direct.h> #include <asm/amd_iommu_types.h> #include <asm/amd_iommu.h> -#include <asm/gart.h> +#include <asm/iommu.h> /* * definitions for the ACPI scanning code diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index 9f907806c1a..44e21826db1 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -21,6 +21,7 @@ #include <linux/suspend.h> #include <asm/e820.h> #include <asm/io.h> +#include <asm/iommu.h> #include <asm/gart.h> #include <asm/pci-direct.h> #include <asm/dma.h> diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c index a437d027f20..d6c89835837 100644 --- a/arch/x86/kernel/apic_32.c +++ b/arch/x86/kernel/apic_32.c @@ -75,7 +75,7 @@ char system_vectors[NR_VECTORS] = { [0 ... NR_VECTORS-1] = SYS_VECTOR_FREE}; /* * Debug level, exported for io_apic.c */ -int apic_verbosity; +unsigned int apic_verbosity; int pic_mode; @@ -177,7 +177,7 @@ void __cpuinit enable_NMI_through_LVT0(void) /* Level triggered for 82489DX */ if (!lapic_is_integrated()) v |= APIC_LVT_LEVEL_TRIGGER; - apic_write_around(APIC_LVT0, v); + apic_write(APIC_LVT0, v); } /** @@ -212,9 +212,6 @@ int lapic_get_maxlvt(void) * this function twice on the boot CPU, once with a bogus timeout * value, second time for real. The other (noncalibrating) CPUs * call this function only once, with the real, calibrated value. - * - * We do reads before writes even if unnecessary, to get around the - * P5 APIC double write bug. */ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen) { @@ -229,18 +226,18 @@ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen) if (!irqen) lvtt_value |= APIC_LVT_MASKED; - apic_write_around(APIC_LVTT, lvtt_value); + apic_write(APIC_LVTT, lvtt_value); /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); - apic_write_around(APIC_TDCR, (tmp_value - & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) - | APIC_TDR_DIV_16); + apic_write(APIC_TDCR, + (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | + APIC_TDR_DIV_16); if (!oneshot) - apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); + apic_write(APIC_TMICT, clocks / APIC_DIVISOR); } /* @@ -249,7 +246,7 @@ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen) static int lapic_next_event(unsigned long delta, struct clock_event_device *evt) { - apic_write_around(APIC_TMICT, delta); + apic_write(APIC_TMICT, delta); return 0; } @@ -278,7 +275,7 @@ static void lapic_timer_setup(enum clock_event_mode mode, case CLOCK_EVT_MODE_SHUTDOWN: v = apic_read(APIC_LVTT); v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR); - apic_write_around(APIC_LVTT, v); + apic_write(APIC_LVTT, v); break; case CLOCK_EVT_MODE_RESUME: /* Nothing to do here */ @@ -372,12 +369,7 @@ static void __init lapic_cal_handler(struct clock_event_device *dev) } } -/* - * Setup the boot APIC - * - * Calibrate and verify the result. - */ -void __init setup_boot_APIC_clock(void) +static int __init calibrate_APIC_clock(void) { struct clock_event_device *levt = &__get_cpu_var(lapic_events); const long pm_100ms = PMTMR_TICKS_PER_SEC/10; @@ -387,24 +379,6 @@ void __init setup_boot_APIC_clock(void) long delta, deltapm; int pm_referenced = 0; - /* - * The local apic timer can be disabled via the kernel - * commandline or from the CPU detection code. Register the lapic - * timer as a dummy clock event source on SMP systems, so the - * broadcast mechanism is used. On UP systems simply ignore it. - */ - if (local_apic_timer_disabled) { - /* No broadcast on UP ! */ - if (num_possible_cpus() > 1) { - lapic_clockevent.mult = 1; - setup_APIC_timer(); - } - return; - } - - apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n" - "calibrating APIC timer ...\n"); - local_irq_disable(); /* Replace the global interrupt handler */ @@ -489,8 +463,6 @@ void __init setup_boot_APIC_clock(void) calibration_result / (1000000 / HZ), calibration_result % (1000000 / HZ)); - local_apic_timer_verify_ok = 1; - /* * Do a sanity check on the APIC calibration result */ @@ -498,12 +470,11 @@ void __init setup_boot_APIC_clock(void) local_irq_enable(); printk(KERN_WARNING "APIC frequency too slow, disabling apic timer\n"); - /* No broadcast on UP ! */ - if (num_possible_cpus() > 1) - setup_APIC_timer(); - return; + return -1; } + local_apic_timer_verify_ok = 1; + /* We trust the pm timer based calibration */ if (!pm_referenced) { apic_printk(APIC_VERBOSE, "... verify APIC timer\n"); @@ -543,22 +514,55 @@ void __init setup_boot_APIC_clock(void) if (!local_apic_timer_verify_ok) { printk(KERN_WARNING "APIC timer disabled due to verification failure.\n"); + return -1; + } + + return 0; +} + +/* + * Setup the boot APIC + * + * Calibrate and verify the result. + */ +void __init setup_boot_APIC_clock(void) +{ + /* + * The local apic timer can be disabled via the kernel + * commandline or from the CPU detection code. Register the lapic + * timer as a dummy clock event source on SMP systems, so the + * broadcast mechanism is used. On UP systems simply ignore it. + */ + if (local_apic_timer_disabled) { /* No broadcast on UP ! */ - if (num_possible_cpus() == 1) - return; - } else { - /* - * If nmi_watchdog is set to IO_APIC, we need the - * PIT/HPET going. Otherwise register lapic as a dummy - * device. - */ - if (nmi_watchdog != NMI_IO_APIC) - lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY; - else - printk(KERN_WARNING "APIC timer registered as dummy," - " due to nmi_watchdog=%d!\n", nmi_watchdog); + if (num_possible_cpus() > 1) { + lapic_clockevent.mult = 1; + setup_APIC_timer(); + } + return; } + apic_printk(APIC_VERBOSE, "Using local APIC timer interrupts.\n" + "calibrating APIC timer ...\n"); + + if (calibrate_APIC_clock()) { + /* No broadcast on UP ! */ + if (num_possible_cpus() > 1) + setup_APIC_timer(); + return; + } + + /* + * If nmi_watchdog is set to IO_APIC, we need the + * PIT/HPET going. Otherwise register lapic as a dummy + * device. + */ + if (nmi_watchdog != NMI_IO_APIC) + lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY; + else + printk(KERN_WARNING "APIC timer registered as dummy," + " due to nmi_watchdog=%d!\n", nmi_watchdog); + /* Setup the lapic or request the broadcast */ setup_APIC_timer(); } @@ -693,44 +697,44 @@ void clear_local_APIC(void) */ if (maxlvt >= 3) { v = ERROR_APIC_VECTOR; /* any non-zero vector will do */ - apic_write_around(APIC_LVTERR, v | APIC_LVT_MASKED); + apic_write(APIC_LVTERR, v | APIC_LVT_MASKED); } /* * Careful: we have to set masks only first to deassert * any level-triggered sources. */ v = apic_read(APIC_LVTT); - apic_write_around(APIC_LVTT, v | APIC_LVT_MASKED); + apic_write(APIC_LVTT, v | APIC_LVT_MASKED); v = apic_read(APIC_LVT0); - apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED); + apic_write(APIC_LVT0, v | APIC_LVT_MASKED); v = apic_read(APIC_LVT1); - apic_write_around(APIC_LVT1, v | APIC_LVT_MASKED); + apic_write(APIC_LVT1, v | APIC_LVT_MASKED); if (maxlvt >= 4) { v = apic_read(APIC_LVTPC); - apic_write_around(APIC_LVTPC, v | APIC_LVT_MASKED); + apic_write(APIC_LVTPC, v | APIC_LVT_MASKED); } /* lets not touch this if we didn't frob it */ #ifdef CONFIG_X86_MCE_P4THERMAL if (maxlvt >= 5) { v = apic_read(APIC_LVTTHMR); - apic_write_around(APIC_LVTTHMR, v | APIC_LVT_MASKED); + apic_write(APIC_LVTTHMR, v | APIC_LVT_MASKED); } #endif /* * Clean APIC state for other OSs: */ - apic_write_around(APIC_LVTT, APIC_LVT_MASKED); - apic_write_around(APIC_LVT0, APIC_LVT_MASKED); - apic_write_around(APIC_LVT1, APIC_LVT_MASKED); + apic_write(APIC_LVTT, APIC_LVT_MASKED); + apic_write(APIC_LVT0, APIC_LVT_MASKED); + apic_write(APIC_LVT1, APIC_LVT_MASKED); if (maxlvt >= 3) - apic_write_around(APIC_LVTERR, APIC_LVT_MASKED); + apic_write(APIC_LVTERR, APIC_LVT_MASKED); if (maxlvt >= 4) - apic_write_around(APIC_LVTPC, APIC_LVT_MASKED); + apic_write(APIC_LVTPC, APIC_LVT_MASKED); #ifdef CONFIG_X86_MCE_P4THERMAL if (maxlvt >= 5) - apic_write_around(APIC_LVTTHMR, APIC_LVT_MASKED); + apic_write(APIC_LVTTHMR, APIC_LVT_MASKED); #endif /* Integrated APIC (!82489DX) ? */ if (lapic_is_integrated()) { @@ -756,7 +760,7 @@ void disable_local_APIC(void) */ value = apic_read(APIC_SPIV); value &= ~APIC_SPIV_APIC_ENABLED; - apic_write_around(APIC_SPIV, value); + apic_write(APIC_SPIV, value); /* * When LAPIC was disabled by the BIOS and enabled by the kernel, @@ -865,8 +869,8 @@ void __init sync_Arb_IDs(void) apic_wait_icr_idle(); apic_printk(APIC_DEBUG, "Synchronizing Arb IDs.\n"); - apic_write_around(APIC_ICR, APIC_DEST_ALLINC | APIC_INT_LEVELTRIG - | APIC_DM_INIT); + apic_write(APIC_ICR, + APIC_DEST_ALLINC | APIC_INT_LEVELTRIG | APIC_DM_INIT); } /* @@ -902,16 +906,16 @@ void __init init_bsp_APIC(void) else value |= APIC_SPIV_FOCUS_DISABLED; value |= SPURIOUS_APIC_VECTOR; - apic_write_around(APIC_SPIV, value); + apic_write(APIC_SPIV, value); /* * Set up the virtual wire mode. */ - apic_write_around(APIC_LVT0, APIC_DM_EXTINT); + apic_write(APIC_LVT0, APIC_DM_EXTINT); value = APIC_DM_NMI; if (!lapic_is_integrated()) /* 82489DX */ value |= APIC_LVT_LEVEL_TRIGGER; - apic_write_around(APIC_LVT1, value); + apic_write(APIC_LVT1, value); } static void __cpuinit lapic_setup_esr(void) @@ -926,7 +930,7 @@ static void __cpuinit lapic_setup_esr(void) /* enables sending errors */ value = ERROR_APIC_VECTOR; - apic_write_around(APIC_LVTERR, value); + apic_write(APIC_LVTERR, value); /* * spec says clear errors after enabling vector. */ @@ -989,7 +993,7 @@ void __cpuinit setup_local_APIC(void) */ value = apic_read(APIC_TASKPRI); value &= ~APIC_TPRI_MASK; - apic_write_around(APIC_TASKPRI, value); + apic_write(APIC_TASKPRI, value); /* * After a crash, we no longer service the interrupts and a pending @@ -1047,7 +1051,7 @@ void __cpuinit setup_local_APIC(void) * Set spurious IRQ vector */ value |= SPURIOUS_APIC_VECTOR; - apic_write_around(APIC_SPIV, value); + apic_write(APIC_SPIV, value); /* * Set up LVT0, LVT1: @@ -1069,7 +1073,7 @@ void __cpuinit setup_local_APIC(void) apic_printk(APIC_VERBOSE, "masked ExtINT on CPU#%d\n", smp_processor_id()); } - apic_write_around(APIC_LVT0, value); + apic_write(APIC_LVT0, value); /* * only the BP should see the LINT1 NMI signal, obviously. @@ -1080,7 +1084,7 @@ void __cpuinit setup_local_APIC(void) value = APIC_DM_NMI | APIC_LVT_MASKED; if (!integrated) /* 82489DX */ value |= APIC_LVT_LEVEL_TRIGGER; - apic_write_around(APIC_LVT1, value); + apic_write(APIC_LVT1, value); } void __cpuinit end_local_APIC_setup(void) @@ -1091,7 +1095,7 @@ void __cpuinit end_local_APIC_setup(void) /* Disable the local apic timer */ value = apic_read(APIC_LVTT); value |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR); - apic_write_around(APIC_LVTT, value); + apic_write(APIC_LVTT, value); setup_apic_nmi_watchdog(NULL); apic_pm_activate(); @@ -1214,9 +1218,6 @@ int apic_version[MAX_APICS]; int __init APIC_init_uniprocessor(void) { - if (disable_apic) - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); - if (!smp_found_config && !cpu_has_apic) return -1; @@ -1419,7 +1420,7 @@ void disconnect_bsp_APIC(int virt_wire_setup) value &= ~APIC_VECTOR_MASK; value |= APIC_SPIV_APIC_ENABLED; value |= 0xf; - apic_write_around(APIC_SPIV, value); + apic_write(APIC_SPIV, value); if (!virt_wire_setup) { /* @@ -1432,10 +1433,10 @@ void disconnect_bsp_APIC(int virt_wire_setup) APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED); value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING; value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_EXTINT); - apic_write_around(APIC_LVT0, value); + apic_write(APIC_LVT0, value); } else { /* Disable LVT0 */ - apic_write_around(APIC_LVT0, APIC_LVT_MASKED); + apic_write(APIC_LVT0, APIC_LVT_MASKED); } /* @@ -1449,7 +1450,7 @@ void disconnect_bsp_APIC(int virt_wire_setup) APIC_LVT_LEVEL_TRIGGER | APIC_LVT_MASKED); value |= APIC_LVT_REMOTE_IRR | APIC_SEND_PENDING; value = SET_APIC_DELIVERY_MODE(value, APIC_MODE_NMI); - apic_write_around(APIC_LVT1, value); + apic_write(APIC_LVT1, value); } } @@ -1700,7 +1701,7 @@ early_param("lapic", parse_lapic); static int __init parse_nolapic(char *arg) { disable_apic = 1; - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); + setup_clear_cpu_cap(X86_FEATURE_APIC); return 0; } early_param("nolapic", parse_nolapic); diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index 1e3d32e27c1..7f1f030da7e 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -54,7 +54,7 @@ EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok); /* * Debug level, exported for io_apic.c */ -int apic_verbosity; +unsigned int apic_verbosity; /* Have we found an MP table */ int smp_found_config; @@ -314,7 +314,7 @@ static void setup_APIC_timer(void) #define TICK_COUNT 100000000 -static void __init calibrate_APIC_clock(void) +static int __init calibrate_APIC_clock(void) { unsigned apic, apic_start; unsigned long tsc, tsc_start; @@ -368,6 +368,17 @@ static void __init calibrate_APIC_clock(void) clockevent_delta2ns(0xF, &lapic_clockevent); calibration_result = result / HZ; + + /* + * Do a sanity check on the APIC calibration result + */ + if (calibration_result < (1000000 / HZ)) { + printk(KERN_WARNING + "APIC frequency too slow, disabling apic timer\n"); + return -1; + } + + return 0; } /* @@ -394,14 +405,7 @@ void __init setup_boot_APIC_clock(void) } printk(KERN_INFO "Using local APIC timer interrupts.\n"); - calibrate_APIC_clock(); - - /* - * Do a sanity check on the APIC calibration result - */ - if (calibration_result < (1000000 / HZ)) { - printk(KERN_WARNING - "APIC frequency too slow, disabling apic timer\n"); + if (calibrate_APIC_clock()) { /* No broadcast on UP ! */ if (num_possible_cpus() > 1) setup_APIC_timer(); @@ -1337,7 +1341,7 @@ early_param("apic", apic_set_verbosity); static __init int setup_disableapic(char *str) { disable_apic = 1; - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); + setup_clear_cpu_cap(X86_FEATURE_APIC); return 0; } early_param("disableapic", setup_disableapic); diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c index bacf5deeec2..aa89387006f 100644 --- a/arch/x86/kernel/asm-offsets_64.c +++ b/arch/x86/kernel/asm-offsets_64.c @@ -18,6 +18,8 @@ #include <asm/ia32.h> #include <asm/bootparam.h> +#include <xen/interface/xen.h> + #define __NO_STUBS 1 #undef __SYSCALL #undef _ASM_X86_64_UNISTD_H_ @@ -131,5 +133,14 @@ int main(void) OFFSET(BP_loadflags, boot_params, hdr.loadflags); OFFSET(BP_hardware_subarch, boot_params, hdr.hardware_subarch); OFFSET(BP_version, boot_params, hdr.version); + + BLANK(); + DEFINE(PAGE_SIZE_asm, PAGE_SIZE); +#ifdef CONFIG_XEN + BLANK(); + OFFSET(XEN_vcpu_info_mask, vcpu_info, evtchn_upcall_mask); + OFFSET(XEN_vcpu_info_pending, vcpu_info, evtchn_upcall_pending); +#undef ENTRY +#endif return 0; } diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c new file mode 100644 index 00000000000..c639bd55391 --- /dev/null +++ b/arch/x86/kernel/bios_uv.c @@ -0,0 +1,48 @@ +/* + * BIOS run time interface routines. + * + * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <asm/uv/bios.h> + +const char * +x86_bios_strerror(long status) +{ + const char *str; + switch (status) { + case 0: str = "Call completed without error"; break; + case -1: str = "Not implemented"; break; + case -2: str = "Invalid argument"; break; + case -3: str = "Call completed with error"; break; + default: str = "Unknown BIOS status code"; break; + } + return str; +} + +long +x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second, + unsigned long *drift_info) +{ + struct uv_bios_retval isrv; + + BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0); + *ticks_per_second = isrv.v0; + *drift_info = isrv.v1; + return isrv.status; +} +EXPORT_SYMBOL_GPL(x86_bios_freq_base); diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 81a07ca65d4..cae9cabc303 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -24,8 +24,6 @@ extern void vide(void); __asm__(".align 4\nvide: ret"); -int force_mwait __cpuinitdata; - static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) { if (cpuid_eax(0x80000000) >= 0x80000007) { diff --git a/arch/x86/kernel/cpu/amd_64.c b/arch/x86/kernel/cpu/amd_64.c index 7c36fb8a28d..d1692b2a41f 100644 --- a/arch/x86/kernel/cpu/amd_64.c +++ b/arch/x86/kernel/cpu/amd_64.c @@ -115,6 +115,8 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */ if (c->x86_power & (1<<8)) set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); + + set_cpu_cap(c, X86_FEATURE_SYSCALL32); } static void __cpuinit init_amd(struct cpuinfo_x86 *c) diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 1b1c56bb338..c9b58a806e8 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -131,13 +131,7 @@ static void __init check_popad(void) * (for due to lack of "invlpg" and working WP on a i386) * - In order to run on anything without a TSC, we need to be * compiled for a i486. - * - In order to support the local APIC on a buggy Pentium machine, - * we need to be compiled with CONFIG_X86_GOOD_APIC disabled, - * which happens implicitly if compiled for a Pentium or lower - * (unless an advanced selection of CPU features is used) as an - * otherwise config implies a properly working local APIC without - * the need to do extra reads from the APIC. -*/ + */ static void __init check_config(void) { @@ -151,21 +145,6 @@ static void __init check_config(void) if (boot_cpu_data.x86 == 3) panic("Kernel requires i486+ for 'invlpg' and other features"); #endif - -/* - * If we were told we had a good local APIC, check for buggy Pentia, - * i.e. all B steppings and the C2 stepping of P54C when using their - * integrated APIC (see 11AP erratum in "Pentium Processor - * Specification Update"). - */ -#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_GOOD_APIC) - if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL - && cpu_has_apic - && boot_cpu_data.x86 == 5 - && boot_cpu_data.x86_model == 2 - && (boot_cpu_data.x86_mask < 6 || boot_cpu_data.x86_mask == 11)) - panic("Kernel compiled for PMMX+, assumes a local APIC without the read-before-write bug!"); -#endif } diff --git a/arch/x86/kernel/cpu/common_64.c b/arch/x86/kernel/cpu/common_64.c index 7b8cc72feb4..dd6e3f15017 100644 --- a/arch/x86/kernel/cpu/common_64.c +++ b/arch/x86/kernel/cpu/common_64.c @@ -7,15 +7,13 @@ #include <linux/module.h> #include <linux/kgdb.h> #include <linux/topology.h> -#include <linux/string.h> #include <linux/delay.h> #include <linux/smp.h> -#include <linux/module.h> #include <linux/percpu.h> -#include <asm/processor.h> #include <asm/i387.h> #include <asm/msr.h> #include <asm/io.h> +#include <asm/linkage.h> #include <asm/mmu_context.h> #include <asm/mtrr.h> #include <asm/mce.h> @@ -305,7 +303,6 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) c->x86_capability[2] = cpuid_edx(0x80860001); } - c->extended_cpuid_level = cpuid_eax(0x80000000); if (c->extended_cpuid_level >= 0x80000007) c->x86_power = cpuid_edx(0x80000007); @@ -316,18 +313,11 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) c->x86_phys_bits = eax & 0xff; } - /* Assume all 64-bit CPUs support 32-bit syscall */ - set_cpu_cap(c, X86_FEATURE_SYSCALL32); - if (c->x86_vendor != X86_VENDOR_UNKNOWN && cpu_devs[c->x86_vendor]->c_early_init) cpu_devs[c->x86_vendor]->c_early_init(c); validate_pat_support(c); - - /* early_param could clear that, but recall get it set again */ - if (disable_apic) - clear_cpu_cap(c, X86_FEATURE_APIC); } /* @@ -517,8 +507,7 @@ void pda_init(int cpu) } char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + - DEBUG_STKSZ] -__attribute__((section(".bss.page_aligned"))); + DEBUG_STKSZ] __page_aligned_bss; extern asmlinkage void ignore_sysret(void); diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 70609efdf1d..b75f2569b8f 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -227,6 +227,16 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c) if (cpu_has_bts) ds_init_intel(c); + /* + * See if we have a good local APIC by checking for buggy Pentia, + * i.e. all B steppings and the C2 stepping of P54C when using their + * integrated APIC (see 11AP erratum in "Pentium Processor + * Specification Update"). + */ + if (cpu_has_apic && (c->x86<<8 | c->x86_model<<4) == 0x520 && + (c->x86_mask < 0x6 || c->x86_mask == 0xb)) + set_cpu_cap(c, X86_FEATURE_11AP); + #ifdef CONFIG_X86_NUMAQ numaq_tsc_disable(); #endif diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index 2c8afafa18e..ff517f0b8cc 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -780,15 +780,14 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev) } kobject_put(per_cpu(cache_kobject, cpu)); cpuid4_cache_sysfs_exit(cpu); - break; + return retval; } kobject_uevent(&(this_object->kobj), KOBJ_ADD); } - if (!retval) - cpu_set(cpu, cache_dev_map); + cpu_set(cpu, cache_dev_map); kobject_uevent(per_cpu(cache_kobject, cpu), KOBJ_ADD); - return retval; + return 0; } static void __cpuinit cache_remove_dev(struct sys_device * sys_dev) diff --git a/arch/x86/kernel/cpu/mcheck/p4.c b/arch/x86/kernel/cpu/mcheck/p4.c index eef001ad3bd..9b60fce09f7 100644 --- a/arch/x86/kernel/cpu/mcheck/p4.c +++ b/arch/x86/kernel/cpu/mcheck/p4.c @@ -102,7 +102,7 @@ static void intel_init_thermal(struct cpuinfo_x86 *c) /* The temperature transition interrupt handler setup */ h = THERMAL_APIC_VECTOR; /* our delivery vector */ h |= (APIC_DM_FIXED | APIC_LVT_MASKED); /* we'll mask till we're ready */ - apic_write_around(APIC_LVTTHMR, h); + apic_write(APIC_LVTTHMR, h); rdmsr(MSR_IA32_THERM_INTERRUPT, l, h); wrmsr(MSR_IA32_THERM_INTERRUPT, l | 0x03 , h); @@ -114,7 +114,7 @@ static void intel_init_thermal(struct cpuinfo_x86 *c) wrmsr(MSR_IA32_MISC_ENABLE, l | (1<<3), h); l = apic_read(APIC_LVTTHMR); - apic_write_around(APIC_LVTTHMR, l & ~APIC_LVT_MASKED); + apic_write(APIC_LVTTHMR, l & ~APIC_LVT_MASKED); printk(KERN_INFO "CPU%d: Thermal monitoring enabled\n", cpu); /* enable thermal throttle processing */ diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 28c29180b38..9af89078f7b 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -877,7 +877,8 @@ void __init early_res_to_bootmem(u64 start, u64 end) for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) count++; - printk(KERN_INFO "(%d early reservations) ==> bootmem\n", count); + printk(KERN_INFO "(%d early reservations) ==> bootmem [%010llx - %010llx]\n", + count, start, end); for (i = 0; i < count; i++) { struct early_res *r = &early_res[i]; printk(KERN_INFO " #%d [%010llx - %010llx] %16s", i, @@ -1298,11 +1299,6 @@ void __init e820_reserve_resources(void) } } -/* - * Non-standard memory setup can be specified via this quirk: - */ -char * (*arch_memory_setup_quirk)(void); - char *__init default_machine_specific_memory_setup(void) { char *who = "BIOS-e820"; @@ -1343,8 +1339,8 @@ char *__init default_machine_specific_memory_setup(void) char *__init __attribute__((weak)) machine_specific_memory_setup(void) { - if (arch_memory_setup_quirk) { - char *who = arch_memory_setup_quirk(); + if (x86_quirks->arch_memory_setup) { + char *who = x86_quirks->arch_memory_setup(); if (who) return who; @@ -1367,24 +1363,3 @@ void __init setup_memory_map(void) printk(KERN_INFO "BIOS-provided physical RAM map:\n"); e820_print_map(who); } - -#ifdef CONFIG_X86_64 -int __init arch_get_ram_range(int slot, u64 *addr, u64 *size) -{ - int i; - - if (slot < 0 || slot >= e820.nr_map) - return -1; - for (i = slot; i < e820.nr_map; i++) { - if (e820.map[i].type != E820_RAM) - continue; - break; - } - if (i == e820.nr_map || e820.map[i].addr > (max_pfn << PAGE_SHIFT)) - return -1; - *addr = e820.map[i].addr; - *size = min_t(u64, e820.map[i].size + e820.map[i].addr, - max_pfn << PAGE_SHIFT) - *addr; - return i + 1; -} -#endif diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c index a0e11c0cc87..4353cf5e6fa 100644 --- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -16,10 +16,7 @@ #include <asm/dma.h> #include <asm/io_apic.h> #include <asm/apic.h> - -#ifdef CONFIG_GART_IOMMU -#include <asm/gart.h> -#endif +#include <asm/iommu.h> static void __init fix_hypertransport_config(int num, int slot, int func) { diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 6bc07f0f120..cdfd94cc6b1 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -332,7 +332,7 @@ sysenter_past_esp: GET_THREAD_INFO(%ebp) /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */ - testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp) + testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp) jnz syscall_trace_entry cmpl $(nr_syscalls), %eax jae syscall_badsys @@ -370,7 +370,7 @@ ENTRY(system_call) GET_THREAD_INFO(%ebp) # system call tracing in operation / emulation /* Note, _TIF_SECCOMP is bit number 8, and so it needs testw and not testb */ - testw $(_TIF_SYSCALL_EMU|_TIF_SYSCALL_TRACE|_TIF_SECCOMP|_TIF_SYSCALL_AUDIT),TI_flags(%ebp) + testw $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp) jnz syscall_trace_entry cmpl $(nr_syscalls), %eax jae syscall_badsys @@ -383,10 +383,6 @@ syscall_exit: # setting need_resched or sigpending # between sampling and the iret TRACE_IRQS_OFF - testl $X86_EFLAGS_TF,PT_EFLAGS(%esp) # If tracing set singlestep flag on exit - jz no_singlestep - orl $_TIF_SINGLESTEP,TI_flags(%ebp) -no_singlestep: movl TI_flags(%ebp), %ecx testw $_TIF_ALLWORK_MASK, %cx # current->work jne syscall_exit_work @@ -514,12 +510,8 @@ END(work_pending) syscall_trace_entry: movl $-ENOSYS,PT_EAX(%esp) movl %esp, %eax - xorl %edx,%edx - call do_syscall_trace - cmpl $0, %eax - jne resume_userspace # ret != 0 -> running under PTRACE_SYSEMU, - # so must skip actual syscall - movl PT_ORIG_EAX(%esp), %eax + call syscall_trace_enter + /* What it returned is what we'll actually use. */ cmpl $(nr_syscalls), %eax jnae syscall_call jmp syscall_exit @@ -528,14 +520,13 @@ END(syscall_trace_entry) # perform syscall exit tracing ALIGN syscall_exit_work: - testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl + testb $_TIF_WORK_SYSCALL_EXIT, %cl jz work_pending TRACE_IRQS_ON - ENABLE_INTERRUPTS(CLBR_ANY) # could let do_syscall_trace() call + ENABLE_INTERRUPTS(CLBR_ANY) # could let syscall_trace_leave() call # schedule() instead movl %esp, %eax - movl $1, %edx - call do_syscall_trace + call syscall_trace_leave jmp resume_userspace END(syscall_exit_work) CFI_ENDPROC @@ -1024,6 +1015,7 @@ ENDPROC(kernel_thread_helper) ENTRY(xen_sysenter_target) RING0_INT_FRAME addl $5*4, %esp /* remove xen-provided frame */ + CFI_ADJUST_CFA_OFFSET -5*4 jmp sysenter_past_esp CFI_ENDPROC diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index ae63e584c34..8410e26f418 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -349,8 +349,7 @@ ENTRY(system_call_after_swapgs) movq %rcx,RIP-ARGOFFSET(%rsp) CFI_REL_OFFSET rip,RIP-ARGOFFSET GET_THREAD_INFO(%rcx) - testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \ - TI_flags(%rcx) + testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%rcx) jnz tracesys cmpq $__NR_syscall_max,%rax ja badsys @@ -430,7 +429,12 @@ tracesys: FIXUP_TOP_OF_STACK %rdi movq %rsp,%rdi call syscall_trace_enter - LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */ + /* + * Reload arg registers from stack in case ptrace changed them. + * We don't reload %rax because syscall_trace_enter() returned + * the value it wants us to use in the table lookup. + */ + LOAD_ARGS ARGOFFSET, 1 RESTORE_REST cmpq $__NR_syscall_max,%rax ja int_ret_from_sys_call /* RAX(%rsp) set to -ENOSYS above */ @@ -483,7 +487,7 @@ int_very_careful: ENABLE_INTERRUPTS(CLBR_NONE) SAVE_REST /* Check for syscall exit trace */ - testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edx + testl $_TIF_WORK_SYSCALL_EXIT,%edx jz int_signal pushq %rdi CFI_ADJUST_CFA_OFFSET 8 @@ -491,7 +495,7 @@ int_very_careful: call syscall_trace_leave popq %rdi CFI_ADJUST_CFA_OFFSET -8 - andl $~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP),%edi + andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi jmp int_restore_rest int_signal: @@ -1189,6 +1193,7 @@ END(device_not_available) /* runs on exception stack */ KPROBE_ENTRY(debug) INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME pushq $0 CFI_ADJUST_CFA_OFFSET 8 paranoidentry do_debug, DEBUG_STACK @@ -1198,6 +1203,7 @@ KPROBE_END(debug) /* runs on exception stack */ KPROBE_ENTRY(nmi) INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME pushq $-1 CFI_ADJUST_CFA_OFFSET 8 paranoidentry do_nmi, 0, 0 @@ -1211,6 +1217,7 @@ KPROBE_END(nmi) KPROBE_ENTRY(int3) INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME pushq $0 CFI_ADJUST_CFA_OFFSET 8 paranoidentry do_int3, DEBUG_STACK @@ -1237,6 +1244,7 @@ END(coprocessor_segment_overrun) /* runs on exception stack */ ENTRY(double_fault) XCPT_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME paranoidentry do_double_fault jmp paranoid_exit1 CFI_ENDPROC @@ -1253,6 +1261,7 @@ END(segment_not_present) /* runs on exception stack */ ENTRY(stack_segment) XCPT_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME paranoidentry do_stack_segment jmp paranoid_exit1 CFI_ENDPROC @@ -1278,6 +1287,7 @@ END(spurious_interrupt_bug) /* runs on exception stack */ ENTRY(machine_check) INTR_FRAME + PARAVIRT_ADJUST_EXCEPTION_FRAME pushq $0 CFI_ADJUST_CFA_OFFSET 8 paranoidentry do_machine_check @@ -1312,3 +1322,103 @@ KPROBE_ENTRY(ignore_sysret) sysret CFI_ENDPROC ENDPROC(ignore_sysret) + +#ifdef CONFIG_XEN +ENTRY(xen_hypervisor_callback) + zeroentry xen_do_hypervisor_callback +END(xen_hypervisor_callback) + +/* +# A note on the "critical region" in our callback handler. +# We want to avoid stacking callback handlers due to events occurring +# during handling of the last event. To do this, we keep events disabled +# until we've done all processing. HOWEVER, we must enable events before +# popping the stack frame (can't be done atomically) and so it would still +# be possible to get enough handler activations to overflow the stack. +# Although unlikely, bugs of that kind are hard to track down, so we'd +# like to avoid the possibility. +# So, on entry to the handler we detect whether we interrupted an +# existing activation in its critical region -- if so, we pop the current +# activation and restart the handler using the previous one. +*/ +ENTRY(xen_do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs) + CFI_STARTPROC +/* Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will + see the correct pointer to the pt_regs */ + movq %rdi, %rsp # we don't return, adjust the stack frame + CFI_ENDPROC + CFI_DEFAULT_STACK +11: incl %gs:pda_irqcount + movq %rsp,%rbp + CFI_DEF_CFA_REGISTER rbp + cmovzq %gs:pda_irqstackptr,%rsp + pushq %rbp # backlink for old unwinder + call xen_evtchn_do_upcall + popq %rsp + CFI_DEF_CFA_REGISTER rsp + decl %gs:pda_irqcount + jmp error_exit + CFI_ENDPROC +END(do_hypervisor_callback) + +/* +# Hypervisor uses this for application faults while it executes. +# We get here for two reasons: +# 1. Fault while reloading DS, ES, FS or GS +# 2. Fault while executing IRET +# Category 1 we do not need to fix up as Xen has already reloaded all segment +# registers that could be reloaded and zeroed the others. +# Category 2 we fix up by killing the current process. We cannot use the +# normal Linux return path in this case because if we use the IRET hypercall +# to pop the stack frame we end up in an infinite loop of failsafe callbacks. +# We distinguish between categories by comparing each saved segment register +# with its current contents: any discrepancy means we in category 1. +*/ +ENTRY(xen_failsafe_callback) + framesz = (RIP-0x30) /* workaround buggy gas */ + _frame framesz + CFI_REL_OFFSET rcx, 0 + CFI_REL_OFFSET r11, 8 + movw %ds,%cx + cmpw %cx,0x10(%rsp) + CFI_REMEMBER_STATE + jne 1f + movw %es,%cx + cmpw %cx,0x18(%rsp) + jne 1f + movw %fs,%cx + cmpw %cx,0x20(%rsp) + jne 1f + movw %gs,%cx + cmpw %cx,0x28(%rsp) + jne 1f + /* All segments match their saved values => Category 2 (Bad IRET). */ + movq (%rsp),%rcx + CFI_RESTORE rcx + movq 8(%rsp),%r11 + CFI_RESTORE r11 + addq $0x30,%rsp + CFI_ADJUST_CFA_OFFSET -0x30 + pushq $0 + CFI_ADJUST_CFA_OFFSET 8 + pushq %r11 + CFI_ADJUST_CFA_OFFSET 8 + pushq %rcx + CFI_ADJUST_CFA_OFFSET 8 + jmp general_protection + CFI_RESTORE_STATE +1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */ + movq (%rsp),%rcx + CFI_RESTORE rcx + movq 8(%rsp),%r11 + CFI_RESTORE r11 + addq $0x30,%rsp + CFI_ADJUST_CFA_OFFSET -0x30 + pushq $0 + CFI_ADJUST_CFA_OFFSET 8 + SAVE_ALL + jmp error_exit + CFI_ENDPROC +END(xen_failsafe_callback) + +#endif /* CONFIG_XEN */ diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c index 711f11c30b0..3c392934069 100644 --- a/arch/x86/kernel/genx2apic_uv_x.c +++ b/arch/x86/kernel/genx2apic_uv_x.c @@ -24,6 +24,7 @@ #include <asm/pgtable.h> #include <asm/uv/uv_mmrs.h> #include <asm/uv/uv_hub.h> +#include <asm/uv/bios.h> DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info); EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info); @@ -40,6 +41,9 @@ EXPORT_SYMBOL_GPL(uv_cpu_to_blade); short uv_possible_blades; EXPORT_SYMBOL_GPL(uv_possible_blades); +unsigned long sn_rtc_cycles_per_second; +EXPORT_SYMBOL(sn_rtc_cycles_per_second); + /* Start with all IRQs pointing to boot CPU. IRQ balancing will shift them. */ static cpumask_t uv_target_cpus(void) @@ -272,6 +276,23 @@ static __init void map_mmioh_high(int max_pnode) map_high("MMIOH", mmioh.s.base, shift, map_uc); } +static __init void uv_rtc_init(void) +{ + long status, ticks_per_sec, drift; + + status = + x86_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec, + &drift); + if (status != 0 || ticks_per_sec < 100000) { + printk(KERN_WARNING + "unable to determine platform RTC clock frequency, " + "guessing.\n"); + /* BIOS gives wrong value for clock freq. so guess */ + sn_rtc_cycles_per_second = 1000000000000UL / 30000UL; + } else + sn_rtc_cycles_per_second = ticks_per_sec; +} + static __init void uv_system_init(void) { union uvh_si_addr_map_config_u m_n_config; @@ -326,6 +347,8 @@ static __init void uv_system_init(void) gnode_upper = (((unsigned long)node_id.s.node_id) & ~((1 << n_val) - 1)) << m_val; + uv_rtc_init(); + for_each_present_cpu(cpu) { nid = cpu_to_node(cpu); pnode = uv_apicid_to_pnode(per_cpu(x86_cpu_to_apicid, cpu)); diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index c9781982914..1b318e903bf 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -39,6 +39,13 @@ static struct x8664_pda *__cpu_pda[NR_CPUS] __initdata; static struct x8664_pda *__cpu_pda[NR_CPUS] __read_mostly; #endif +void __init x86_64_init_pda(void) +{ + _cpu_pda = __cpu_pda; + cpu_pda(0) = &_boot_cpu_pda; + pda_init(0); +} + static void __init zap_identity_mappings(void) { pgd_t *pgd = pgd_offset_k(0UL); @@ -102,9 +109,7 @@ void __init x86_64_start_kernel(char * real_mode_data) early_printk("Kernel alive\n"); - _cpu_pda = __cpu_pda; - cpu_pda(0) = &_boot_cpu_pda; - pda_init(0); + x86_64_init_pda(); early_printk("Kernel really alive\n"); diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index b07ac7b217c..db3280afe88 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -407,6 +407,7 @@ ENTRY(phys_base) /* This must match the first entry in level2_kernel_pgt */ .quad 0x0000000000000000 +#include "../../x86/xen/xen-head.S" .section .bss, "aw", @nobits .align L1_CACHE_BYTES diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c index 558abf4c796..de9aa0e3a9c 100644 --- a/arch/x86/kernel/io_apic_32.c +++ b/arch/x86/kernel/io_apic_32.c @@ -756,7 +756,7 @@ void send_IPI_self(int vector) /* * Send the IPI. The write to APIC_ICR fires this off. */ - apic_write_around(APIC_ICR, cfg); + apic_write(APIC_ICR, cfg); } #endif /* !CONFIG_SMP */ @@ -2030,7 +2030,7 @@ static void mask_lapic_irq(unsigned int irq) unsigned long v; v = apic_read(APIC_LVT0); - apic_write_around(APIC_LVT0, v | APIC_LVT_MASKED); + apic_write(APIC_LVT0, v | APIC_LVT_MASKED); } static void unmask_lapic_irq(unsigned int irq) @@ -2038,7 +2038,7 @@ static void unmask_lapic_irq(unsigned int irq) unsigned long v; v = apic_read(APIC_LVT0); - apic_write_around(APIC_LVT0, v & ~APIC_LVT_MASKED); + apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED); } static struct irq_chip lapic_chip __read_mostly = { @@ -2168,7 +2168,7 @@ static inline void __init check_timer(void) * The AEOI mode will finish them in the 8259A * automatically. */ - apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); + apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT); init_8259A(1); timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver)); @@ -2177,8 +2177,9 @@ static inline void __init check_timer(void) pin2 = ioapic_i8259.pin; apic2 = ioapic_i8259.apic; - printk(KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n", - vector, apic1, pin1, apic2, pin2); + apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X " + "apic1=%d pin1=%d apic2=%d pin2=%d\n", + vector, apic1, pin1, apic2, pin2); /* * Some BIOS writers are clueless and report the ExtINTA @@ -2216,12 +2217,13 @@ static inline void __init check_timer(void) } clear_IO_APIC_pin(apic1, pin1); if (!no_pin1) - printk(KERN_ERR "..MP-BIOS bug: " - "8254 timer not connected to IO-APIC\n"); + apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: " + "8254 timer not connected to IO-APIC\n"); - printk(KERN_INFO "...trying to set up timer (IRQ0) " - "through the 8259A ... "); - printk("\n..... (found pin %d) ...", pin2); + apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer " + "(IRQ0) through the 8259A ...\n"); + apic_printk(APIC_QUIET, KERN_INFO + "..... (found apic %d pin %d) ...\n", apic2, pin2); /* * legacy devices should be connected to IO APIC #0 */ @@ -2230,7 +2232,7 @@ static inline void __init check_timer(void) unmask_IO_APIC_irq(0); enable_8259A_irq(0); if (timer_irq_works()) { - printk("works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "....... works.\n"); timer_through_8259 = 1; if (nmi_watchdog == NMI_IO_APIC) { disable_8259A_irq(0); @@ -2244,44 +2246,47 @@ static inline void __init check_timer(void) */ disable_8259A_irq(0); clear_IO_APIC_pin(apic2, pin2); - printk(" failed.\n"); + apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n"); } if (nmi_watchdog == NMI_IO_APIC) { - printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n"); + apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work " + "through the IO-APIC - disabling NMI Watchdog!\n"); nmi_watchdog = NMI_NONE; } timer_ack = 0; - printk(KERN_INFO "...trying to set up timer as Virtual Wire IRQ..."); + apic_printk(APIC_QUIET, KERN_INFO + "...trying to set up timer as Virtual Wire IRQ...\n"); lapic_register_intr(0, vector); - apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */ + apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */ enable_8259A_irq(0); if (timer_irq_works()) { - printk(" works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); goto out; } disable_8259A_irq(0); - apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector); - printk(" failed.\n"); + apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector); + apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n"); - printk(KERN_INFO "...trying to set up timer as ExtINT IRQ..."); + apic_printk(APIC_QUIET, KERN_INFO + "...trying to set up timer as ExtINT IRQ...\n"); init_8259A(0); make_8259A_irq(0); - apic_write_around(APIC_LVT0, APIC_DM_EXTINT); + apic_write(APIC_LVT0, APIC_DM_EXTINT); unlock_ExtINT_logic(); if (timer_irq_works()) { - printk(" works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); goto out; } - printk(" failed :(.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n"); panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a " - "report. Then try booting with the 'noapic' option"); + "report. Then try booting with the 'noapic' option.\n"); out: local_irq_restore(flags); } diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c index 6510cde36b3..64a46affd85 100644 --- a/arch/x86/kernel/io_apic_64.c +++ b/arch/x86/kernel/io_apic_64.c @@ -45,6 +45,7 @@ #include <asm/proto.h> #include <asm/acpi.h> #include <asm/dma.h> +#include <asm/i8259.h> #include <asm/nmi.h> #include <asm/msidef.h> #include <asm/hypertransport.h> @@ -1696,8 +1697,9 @@ static inline void __init check_timer(void) pin2 = ioapic_i8259.pin; apic2 = ioapic_i8259.apic; - apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n", - cfg->vector, apic1, pin1, apic2, pin2); + apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X " + "apic1=%d pin1=%d apic2=%d pin2=%d\n", + cfg->vector, apic1, pin1, apic2, pin2); /* * Some BIOS writers are clueless and report the ExtINTA @@ -1735,14 +1737,13 @@ static inline void __init check_timer(void) } clear_IO_APIC_pin(apic1, pin1); if (!no_pin1) - apic_printk(APIC_QUIET,KERN_ERR "..MP-BIOS bug: " + apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: " "8254 timer not connected to IO-APIC\n"); - apic_printk(APIC_VERBOSE,KERN_INFO - "...trying to set up timer (IRQ0) " - "through the 8259A ... "); - apic_printk(APIC_VERBOSE,"\n..... (found apic %d pin %d) ...", - apic2, pin2); + apic_printk(APIC_QUIET, KERN_INFO "...trying to set up timer " + "(IRQ0) through the 8259A ...\n"); + apic_printk(APIC_QUIET, KERN_INFO + "..... (found apic %d pin %d) ...\n", apic2, pin2); /* * legacy devices should be connected to IO APIC #0 */ @@ -1751,7 +1752,7 @@ static inline void __init check_timer(void) unmask_IO_APIC_irq(0); enable_8259A_irq(0); if (timer_irq_works()) { - apic_printk(APIC_VERBOSE," works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "....... works.\n"); timer_through_8259 = 1; if (nmi_watchdog == NMI_IO_APIC) { disable_8259A_irq(0); @@ -1765,29 +1766,32 @@ static inline void __init check_timer(void) */ disable_8259A_irq(0); clear_IO_APIC_pin(apic2, pin2); - apic_printk(APIC_VERBOSE," failed.\n"); + apic_printk(APIC_QUIET, KERN_INFO "....... failed.\n"); } if (nmi_watchdog == NMI_IO_APIC) { - printk(KERN_WARNING "timer doesn't work through the IO-APIC - disabling NMI Watchdog!\n"); + apic_printk(APIC_QUIET, KERN_WARNING "timer doesn't work " + "through the IO-APIC - disabling NMI Watchdog!\n"); nmi_watchdog = NMI_NONE; } - apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ..."); + apic_printk(APIC_QUIET, KERN_INFO + "...trying to set up timer as Virtual Wire IRQ...\n"); lapic_register_intr(0); apic_write(APIC_LVT0, APIC_DM_FIXED | cfg->vector); /* Fixed mode */ enable_8259A_irq(0); if (timer_irq_works()) { - apic_printk(APIC_VERBOSE," works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); goto out; } disable_8259A_irq(0); apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector); - apic_printk(APIC_VERBOSE," failed.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... failed.\n"); - apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as ExtINT IRQ..."); + apic_printk(APIC_QUIET, KERN_INFO + "...trying to set up timer as ExtINT IRQ...\n"); init_8259A(0); make_8259A_irq(0); @@ -1796,11 +1800,12 @@ static inline void __init check_timer(void) unlock_ExtINT_logic(); if (timer_irq_works()) { - apic_printk(APIC_VERBOSE," works.\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... works.\n"); goto out; } - apic_printk(APIC_VERBOSE," failed :(.\n"); - panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n"); + apic_printk(APIC_QUIET, KERN_INFO "..... failed :(.\n"); + panic("IO-APIC + timer doesn't work! Boot with apic=debug and send a " + "report. Then try booting with the 'noapic' option.\n"); out: local_irq_restore(flags); } diff --git a/arch/x86/kernel/io_delay.c b/arch/x86/kernel/io_delay.c index 5921e5f0a64..1c3a66a67f8 100644 --- a/arch/x86/kernel/io_delay.c +++ b/arch/x86/kernel/io_delay.c @@ -103,6 +103,9 @@ void __init io_delay_init(void) static int __init io_delay_param(char *s) { + if (!s) + return -EINVAL; + if (!strcmp(s, "0x80")) io_delay_type = CONFIG_IO_DELAY_TYPE_0X80; else if (!strcmp(s, "0xed")) diff --git a/arch/x86/kernel/ipi.c b/arch/x86/kernel/ipi.c index 9d98cda39ad..3f7537b669d 100644 --- a/arch/x86/kernel/ipi.c +++ b/arch/x86/kernel/ipi.c @@ -70,7 +70,7 @@ void __send_IPI_shortcut(unsigned int shortcut, int vector) /* * Send the IPI. The write to APIC_ICR fires this off. */ - apic_write_around(APIC_ICR, cfg); + apic_write(APIC_ICR, cfg); } void send_IPI_self(int vector) @@ -98,7 +98,7 @@ static inline void __send_IPI_dest_field(unsigned long mask, int vector) * prepare target chip field */ cfg = __prepare_ICR2(mask); - apic_write_around(APIC_ICR2, cfg); + apic_write(APIC_ICR2, cfg); /* * program the ICR @@ -108,7 +108,7 @@ static inline void __send_IPI_dest_field(unsigned long mask, int vector) /* * Send the IPI. The write to APIC_ICR fires this off. */ - apic_write_around(APIC_ICR, cfg); + apic_write(APIC_ICR, cfg); } /* diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 47a6f6f1247..1cf8c1fcc08 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -83,11 +83,8 @@ union irq_ctx { static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly; static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly; -static char softirq_stack[NR_CPUS * THREAD_SIZE] - __attribute__((__section__(".bss.page_aligned"))); - -static char hardirq_stack[NR_CPUS * THREAD_SIZE] - __attribute__((__section__(".bss.page_aligned"))); +static char softirq_stack[NR_CPUS * THREAD_SIZE] __page_aligned_bss; +static char hardirq_stack[NR_CPUS * THREAD_SIZE] __page_aligned_bss; static void call_on_stack(void *func, void *stack) { diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c index c0320599171..f2d43bc7551 100644 --- a/arch/x86/kernel/kdebugfs.c +++ b/arch/x86/kernel/kdebugfs.c @@ -12,9 +12,13 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/mm.h> +#include <linux/module.h> #include <asm/setup.h> +struct dentry *arch_debugfs_dir; +EXPORT_SYMBOL(arch_debugfs_dir); + #ifdef CONFIG_DEBUG_BOOT_PARAMS struct setup_data_node { u64 paddr; @@ -209,6 +213,10 @@ static int __init arch_kdebugfs_init(void) { int error = 0; + arch_debugfs_dir = debugfs_create_dir("x86", NULL); + if (!arch_debugfs_dir) + return -ENOMEM; + #ifdef CONFIG_DEBUG_BOOT_PARAMS error = boot_params_kdebugfs_init(); #endif diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c index b8c6743a13d..43c019f85f0 100644 --- a/arch/x86/kernel/kprobes.c +++ b/arch/x86/kernel/kprobes.c @@ -860,7 +860,6 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs) resume_execution(cur, regs, kcb); regs->flags |= kcb->kprobe_saved_flags; - trace_hardirqs_fixup_flags(regs->flags); if ((kcb->kprobe_status != KPROBE_REENTER) && cur->post_handler) { kcb->kprobe_status = KPROBE_HIT_SSDONE; diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 87edf1ceb1d..d02def06ca9 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -113,7 +113,7 @@ static void kvm_setup_secondary_clock(void) #endif #ifdef CONFIG_SMP -void __init kvm_smp_prepare_boot_cpu(void) +static void __init kvm_smp_prepare_boot_cpu(void) { WARN_ON(kvm_register_clock("primary cpu clock")); native_smp_prepare_boot_cpu(); diff --git a/arch/x86/kernel/module_64.c b/arch/x86/kernel/module_64.c index a888e67f587..0e867676b5a 100644 --- a/arch/x86/kernel/module_64.c +++ b/arch/x86/kernel/module_64.c @@ -150,7 +150,8 @@ int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL; + const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL, + *para = NULL; char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { @@ -160,6 +161,8 @@ int module_finalize(const Elf_Ehdr *hdr, alt = s; if (!strcmp(".smp_locks", secstrings + s->sh_name)) locks= s; + if (!strcmp(".parainstructions", secstrings + s->sh_name)) + para = s; } if (alt) { @@ -175,6 +178,11 @@ int module_finalize(const Elf_Ehdr *hdr, tseg, tseg + text->sh_size); } + if (para) { + void *pseg = (void *)para->sh_addr; + apply_paravirt(pseg, pseg + para->sh_size); + } + return module_bug_finalize(hdr, sechdrs, me); } diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index 3b25e49380c..6ae005ccaed 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -27,6 +27,7 @@ #include <asm/bios_ebda.h> #include <asm/e820.h> #include <asm/trampoline.h> +#include <asm/setup.h> #include <mach_apic.h> #ifdef CONFIG_X86_32 @@ -48,76 +49,6 @@ static int __init mpf_checksum(unsigned char *mp, int len) return sum & 0xFF; } -#ifdef CONFIG_X86_NUMAQ -int found_numaq; -/* - * Have to match translation table entries to main table entries by counter - * hence the mpc_record variable .... can't see a less disgusting way of - * doing this .... - */ -struct mpc_config_translation { - unsigned char mpc_type; - unsigned char trans_len; - unsigned char trans_type; - unsigned char trans_quad; - unsigned char trans_global; - unsigned char trans_local; - unsigned short trans_reserved; -}; - - -static int mpc_record; -static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] - __cpuinitdata; - -static inline int generate_logical_apicid(int quad, int phys_apicid) -{ - return (quad << 4) + (phys_apicid ? phys_apicid << 1 : 1); -} - - -static inline int mpc_apic_id(struct mpc_config_processor *m, - struct mpc_config_translation *translation_record) -{ - int quad = translation_record->trans_quad; - int logical_apicid = generate_logical_apicid(quad, m->mpc_apicid); - - printk(KERN_DEBUG "Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n", - m->mpc_apicid, - (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8, - (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4, - m->mpc_apicver, quad, logical_apicid); - return logical_apicid; -} - -int mp_bus_id_to_node[MAX_MP_BUSSES]; - -int mp_bus_id_to_local[MAX_MP_BUSSES]; - -static void mpc_oem_bus_info(struct mpc_config_bus *m, char *name, - struct mpc_config_translation *translation) -{ - int quad = translation->trans_quad; - int local = translation->trans_local; - - mp_bus_id_to_node[m->mpc_busid] = quad; - mp_bus_id_to_local[m->mpc_busid] = local; - printk(KERN_INFO "Bus #%d is %s (node %d)\n", - m->mpc_busid, name, quad); -} - -int quad_local_to_mp_bus_id [NR_CPUS/4][4]; -static void mpc_oem_pci_bus(struct mpc_config_bus *m, - struct mpc_config_translation *translation) -{ - int quad = translation->trans_quad; - int local = translation->trans_local; - - quad_local_to_mp_bus_id[quad][local] = m->mpc_busid; -} - -#endif - static void __cpuinit MP_processor_info(struct mpc_config_processor *m) { int apicid; @@ -127,14 +58,12 @@ static void __cpuinit MP_processor_info(struct mpc_config_processor *m) disabled_cpus++; return; } -#ifdef CONFIG_X86_NUMAQ - if (found_numaq) - apicid = mpc_apic_id(m, translation_table[mpc_record]); + + if (x86_quirks->mpc_apic_id) + apicid = x86_quirks->mpc_apic_id(m); else apicid = m->mpc_apicid; -#else - apicid = m->mpc_apicid; -#endif + if (m->mpc_cpuflag & CPU_BOOTPROCESSOR) { bootup_cpu = " (Bootup-CPU)"; boot_cpu_physical_apicid = m->mpc_apicid; @@ -151,12 +80,10 @@ static void __init MP_bus_info(struct mpc_config_bus *m) memcpy(str, m->mpc_bustype, 6); str[6] = 0; -#ifdef CONFIG_X86_NUMAQ - if (found_numaq) - mpc_oem_bus_info(m, str, translation_table[mpc_record]); -#else - printk(KERN_INFO "Bus #%d is %s\n", m->mpc_busid, str); -#endif + if (x86_quirks->mpc_oem_bus_info) + x86_quirks->mpc_oem_bus_info(m, str); + else + printk(KERN_INFO "Bus #%d is %s\n", m->mpc_busid, str); #if MAX_MP_BUSSES < 256 if (m->mpc_busid >= MAX_MP_BUSSES) { @@ -173,10 +100,9 @@ static void __init MP_bus_info(struct mpc_config_bus *m) mp_bus_id_to_type[m->mpc_busid] = MP_BUS_ISA; #endif } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) { -#ifdef CONFIG_X86_NUMAQ - if (found_numaq) - mpc_oem_pci_bus(m, translation_table[mpc_record]); -#endif + if (x86_quirks->mpc_oem_pci_bus) + x86_quirks->mpc_oem_pci_bus(m); + clear_bit(m->mpc_busid, mp_bus_not_pci); #if defined(CONFIG_EISA) || defined (CONFIG_MCA) mp_bus_id_to_type[m->mpc_busid] = MP_BUS_PCI; @@ -316,83 +242,6 @@ static void __init MP_lintsrc_info(struct mpc_config_lintsrc *m) m->mpc_srcbusirq, m->mpc_destapic, m->mpc_destapiclint); } -#ifdef CONFIG_X86_NUMAQ -static void __init MP_translation_info(struct mpc_config_translation *m) -{ - printk(KERN_INFO - "Translation: record %d, type %d, quad %d, global %d, local %d\n", - mpc_record, m->trans_type, m->trans_quad, m->trans_global, - m->trans_local); - - if (mpc_record >= MAX_MPC_ENTRY) - printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n"); - else - translation_table[mpc_record] = m; /* stash this for later */ - if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad)) - node_set_online(m->trans_quad); -} - -/* - * Read/parse the MPC oem tables - */ - -static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable, - unsigned short oemsize) -{ - int count = sizeof(*oemtable); /* the header size */ - unsigned char *oemptr = ((unsigned char *)oemtable) + count; - - mpc_record = 0; - printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n", - oemtable); - if (memcmp(oemtable->oem_signature, MPC_OEM_SIGNATURE, 4)) { - printk(KERN_WARNING - "SMP mpc oemtable: bad signature [%c%c%c%c]!\n", - oemtable->oem_signature[0], oemtable->oem_signature[1], - oemtable->oem_signature[2], oemtable->oem_signature[3]); - return; - } - if (mpf_checksum((unsigned char *)oemtable, oemtable->oem_length)) { - printk(KERN_WARNING "SMP oem mptable: checksum error!\n"); - return; - } - while (count < oemtable->oem_length) { - switch (*oemptr) { - case MP_TRANSLATION: - { - struct mpc_config_translation *m = - (struct mpc_config_translation *)oemptr; - MP_translation_info(m); - oemptr += sizeof(*m); - count += sizeof(*m); - ++mpc_record; - break; - } - default: - { - printk(KERN_WARNING - "Unrecognised OEM table entry type! - %d\n", - (int)*oemptr); - return; - } - } - } -} - -void numaq_mps_oem_check(struct mp_config_table *mpc, char *oem, - char *productid) -{ - if (strncmp(oem, "IBM NUMA", 8)) - printk("Warning! Not a NUMA-Q system!\n"); - else - found_numaq = 1; - - if (mpc->mpc_oemptr) - smp_read_mpc_oem((struct mp_config_oemtable *)mpc->mpc_oemptr, - mpc->mpc_oemsize); -} -#endif /* CONFIG_X86_NUMAQ */ - /* * Read/parse the MPC */ @@ -457,7 +306,6 @@ static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early) } else mps_oem_check(mpc, oem, str); #endif - /* save the local APIC address, it might be non-default */ if (!acpi_lapic) mp_lapic_addr = mpc->mpc_lapic; @@ -465,12 +313,17 @@ static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early) if (early) return 1; + if (mpc->mpc_oemptr && x86_quirks->smp_read_mpc_oem) { + struct mp_config_oemtable *oem_table = (struct mp_config_oemtable *)(unsigned long)mpc->mpc_oemptr; + x86_quirks->smp_read_mpc_oem(oem_table, mpc->mpc_oemsize); + } + /* * Now process the configuration blocks. */ -#ifdef CONFIG_X86_NUMAQ - mpc_record = 0; -#endif + if (x86_quirks->mpc_record) + *x86_quirks->mpc_record = 0; + while (count < mpc->mpc_length) { switch (*mpt) { case MP_PROCESSOR: @@ -536,9 +389,8 @@ static int __init smp_read_mpc(struct mp_config_table *mpc, unsigned early) count = mpc->mpc_length; break; } -#ifdef CONFIG_X86_NUMAQ - ++mpc_record; -#endif + if (x86_quirks->mpc_record) + (*x86_quirks->mpc_record)++; } #ifdef CONFIG_X86_GENERICARCH @@ -726,20 +578,14 @@ static inline void __init construct_default_ISA_mptable(int mpc_default_type) static struct intel_mp_floating *mpf_found; /* - * Machine specific quirk for finding the SMP config before other setup - * activities destroy the table: - */ -int (*mach_get_smp_config_quirk)(unsigned int early); - -/* * Scan the memory blocks for an SMP configuration block. */ static void __init __get_smp_config(unsigned int early) { struct intel_mp_floating *mpf = mpf_found; - if (mach_get_smp_config_quirk) { - if (mach_get_smp_config_quirk(early)) + if (x86_quirks->mach_get_smp_config) { + if (x86_quirks->mach_get_smp_config(early)) return; } if (acpi_lapic && early) @@ -899,14 +745,12 @@ static int __init smp_scan_config(unsigned long base, unsigned long length, return 0; } -int (*mach_find_smp_config_quirk)(unsigned int reserve); - static void __init __find_smp_config(unsigned int reserve) { unsigned int address; - if (mach_find_smp_config_quirk) { - if (mach_find_smp_config_quirk(reserve)) + if (x86_quirks->mach_find_smp_config) { + if (x86_quirks->mach_find_smp_config(reserve)) return; } /* diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c index ec024b3baad..ac6d51222e7 100644 --- a/arch/x86/kernel/nmi.c +++ b/arch/x86/kernel/nmi.c @@ -263,7 +263,7 @@ late_initcall(init_lapic_nmi_sysfs); static void __acpi_nmi_enable(void *__unused) { - apic_write_around(APIC_LVT0, APIC_DM_NMI); + apic_write(APIC_LVT0, APIC_DM_NMI); } /* @@ -277,7 +277,7 @@ void acpi_nmi_enable(void) static void __acpi_nmi_disable(void *__unused) { - apic_write_around(APIC_LVT0, APIC_DM_NMI | APIC_LVT_MASKED); + apic_write(APIC_LVT0, APIC_DM_NMI | APIC_LVT_MASKED); } /* @@ -448,6 +448,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason) #ifdef CONFIG_SYSCTL +static int __init setup_unknown_nmi_panic(char *str) +{ + unknown_nmi_panic = 1; + return 1; +} +__setup("unknown_nmi_panic", setup_unknown_nmi_panic); + static int unknown_nmi_panic_callback(struct pt_regs *regs, int cpu) { unsigned char reason = get_nmi_reason(); diff --git a/arch/x86/kernel/numaq_32.c b/arch/x86/kernel/numaq_32.c index a23e8233b9a..b8c45610b20 100644 --- a/arch/x86/kernel/numaq_32.c +++ b/arch/x86/kernel/numaq_32.c @@ -33,6 +33,7 @@ #include <asm/processor.h> #include <asm/mpspec.h> #include <asm/e820.h> +#include <asm/setup.h> #define MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT)) @@ -71,6 +72,188 @@ static void __init smp_dump_qct(void) } } + +void __init numaq_tsc_disable(void) +{ + if (!found_numaq) + return; + + if (num_online_nodes() > 1) { + printk(KERN_DEBUG "NUMAQ: disabling TSC\n"); + setup_clear_cpu_cap(X86_FEATURE_TSC); + } +} + +static int __init numaq_pre_time_init(void) +{ + numaq_tsc_disable(); + return 0; +} + +int found_numaq; +/* + * Have to match translation table entries to main table entries by counter + * hence the mpc_record variable .... can't see a less disgusting way of + * doing this .... + */ +struct mpc_config_translation { + unsigned char mpc_type; + unsigned char trans_len; + unsigned char trans_type; + unsigned char trans_quad; + unsigned char trans_global; + unsigned char trans_local; + unsigned short trans_reserved; +}; + +/* x86_quirks member */ +static int mpc_record; +static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY] + __cpuinitdata; + +static inline int generate_logical_apicid(int quad, int phys_apicid) +{ + return (quad << 4) + (phys_apicid ? phys_apicid << 1 : 1); +} + +/* x86_quirks member */ +static int mpc_apic_id(struct mpc_config_processor *m) +{ + int quad = translation_table[mpc_record]->trans_quad; + int logical_apicid = generate_logical_apicid(quad, m->mpc_apicid); + + printk(KERN_DEBUG "Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n", + m->mpc_apicid, + (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8, + (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4, + m->mpc_apicver, quad, logical_apicid); + return logical_apicid; +} + +int mp_bus_id_to_node[MAX_MP_BUSSES]; + +int mp_bus_id_to_local[MAX_MP_BUSSES]; + +/* x86_quirks member */ +static void mpc_oem_bus_info(struct mpc_config_bus *m, char *name) +{ + int quad = translation_table[mpc_record]->trans_quad; + int local = translation_table[mpc_record]->trans_local; + + mp_bus_id_to_node[m->mpc_busid] = quad; + mp_bus_id_to_local[m->mpc_busid] = local; + printk(KERN_INFO "Bus #%d is %s (node %d)\n", + m->mpc_busid, name, quad); +} + +int quad_local_to_mp_bus_id [NR_CPUS/4][4]; + +/* x86_quirks member */ +static void mpc_oem_pci_bus(struct mpc_config_bus *m) +{ + int quad = translation_table[mpc_record]->trans_quad; + int local = translation_table[mpc_record]->trans_local; + + quad_local_to_mp_bus_id[quad][local] = m->mpc_busid; +} + +static void __init MP_translation_info(struct mpc_config_translation *m) +{ + printk(KERN_INFO + "Translation: record %d, type %d, quad %d, global %d, local %d\n", + mpc_record, m->trans_type, m->trans_quad, m->trans_global, + m->trans_local); + + if (mpc_record >= MAX_MPC_ENTRY) + printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n"); + else + translation_table[mpc_record] = m; /* stash this for later */ + if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad)) + node_set_online(m->trans_quad); +} + +static int __init mpf_checksum(unsigned char *mp, int len) +{ + int sum = 0; + + while (len--) + sum += *mp++; + + return sum & 0xFF; +} + +/* + * Read/parse the MPC oem tables + */ + +static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable, + unsigned short oemsize) +{ + int count = sizeof(*oemtable); /* the header size */ + unsigned char *oemptr = ((unsigned char *)oemtable) + count; + + mpc_record = 0; + printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n", + oemtable); + if (memcmp(oemtable->oem_signature, MPC_OEM_SIGNATURE, 4)) { + printk(KERN_WARNING + "SMP mpc oemtable: bad signature [%c%c%c%c]!\n", + oemtable->oem_signature[0], oemtable->oem_signature[1], + oemtable->oem_signature[2], oemtable->oem_signature[3]); + return; + } + if (mpf_checksum((unsigned char *)oemtable, oemtable->oem_length)) { + printk(KERN_WARNING "SMP oem mptable: checksum error!\n"); + return; + } + while (count < oemtable->oem_length) { + switch (*oemptr) { + case MP_TRANSLATION: + { + struct mpc_config_translation *m = + (struct mpc_config_translation *)oemptr; + MP_translation_info(m); + oemptr += sizeof(*m); + count += sizeof(*m); + ++mpc_record; + break; + } + default: + { + printk(KERN_WARNING + "Unrecognised OEM table entry type! - %d\n", + (int)*oemptr); + return; + } + } + } +} + +static struct x86_quirks numaq_x86_quirks __initdata = { + .arch_pre_time_init = numaq_pre_time_init, + .arch_time_init = NULL, + .arch_pre_intr_init = NULL, + .arch_memory_setup = NULL, + .arch_intr_init = NULL, + .arch_trap_init = NULL, + .mach_get_smp_config = NULL, + .mach_find_smp_config = NULL, + .mpc_record = &mpc_record, + .mpc_apic_id = mpc_apic_id, + .mpc_oem_bus_info = mpc_oem_bus_info, + .mpc_oem_pci_bus = mpc_oem_pci_bus, + .smp_read_mpc_oem = smp_read_mpc_oem, +}; + +void numaq_mps_oem_check(struct mp_config_table *mpc, char *oem, + char *productid) +{ + if (strncmp(oem, "IBM NUMA", 8)) + printk("Warning! Not a NUMA-Q system!\n"); + else + found_numaq = 1; +} + static __init void early_check_numaq(void) { /* @@ -82,6 +265,9 @@ static __init void early_check_numaq(void) */ if (smp_found_config) early_get_smp_config(); + + if (found_numaq) + x86_quirks = &numaq_x86_quirks; } int __init get_memcfg_numaq(void) @@ -92,14 +278,3 @@ int __init get_memcfg_numaq(void) smp_dump_qct(); return 1; } - -void __init numaq_tsc_disable(void) -{ - if (!found_numaq) - return; - - if (num_online_nodes() > 1) { - printk(KERN_DEBUG "NUMAQ: disabling TSC\n"); - setup_clear_cpu_cap(X86_FEATURE_TSC); - } -} diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index e0f571d58c1..b4564d089b4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -29,6 +29,7 @@ #include <asm/desc.h> #include <asm/setup.h> #include <asm/arch_hooks.h> +#include <asm/pgtable.h> #include <asm/time.h> #include <asm/pgalloc.h> #include <asm/irq.h> @@ -361,7 +362,6 @@ struct pv_cpu_ops pv_cpu_ops = { struct pv_apic_ops pv_apic_ops = { #ifdef CONFIG_X86_LOCAL_APIC .apic_write = native_apic_write, - .apic_write_atomic = native_apic_write_atomic, .apic_read = native_apic_read, .setup_boot_clock = setup_boot_APIC_clock, .setup_secondary_clock = setup_secondary_APIC_clock, @@ -373,6 +373,9 @@ struct pv_mmu_ops pv_mmu_ops = { #ifndef CONFIG_X86_64 .pagetable_setup_start = native_pagetable_setup_start, .pagetable_setup_done = native_pagetable_setup_done, +#else + .pagetable_setup_start = paravirt_nop, + .pagetable_setup_done = paravirt_nop, #endif .read_cr2 = native_read_cr2, diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c index 6959b5c45df..151f2d171f7 100644 --- a/arch/x86/kernel/pci-calgary_64.c +++ b/arch/x86/kernel/pci-calgary_64.c @@ -36,7 +36,7 @@ #include <linux/delay.h> #include <linux/scatterlist.h> #include <linux/iommu-helper.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/calgary.h> #include <asm/tce.h> #include <asm/pci-direct.h> diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 8467ec2320f..a4213c00dff 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -5,12 +5,11 @@ #include <asm/proto.h> #include <asm/dma.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/calgary.h> #include <asm/amd_iommu.h> -int forbid_dac __read_mostly; -EXPORT_SYMBOL(forbid_dac); +static int forbid_dac __read_mostly; const struct dma_mapping_ops *dma_ops; EXPORT_SYMBOL(dma_ops); @@ -114,21 +113,15 @@ void __init pci_iommu_alloc(void) * The order of these functions is important for * fall-back/fail-over reasons */ -#ifdef CONFIG_GART_IOMMU gart_iommu_hole_init(); -#endif -#ifdef CONFIG_CALGARY_IOMMU detect_calgary(); -#endif detect_intel_iommu(); amd_iommu_detect(); -#ifdef CONFIG_SWIOTLB pci_swiotlb_init(); -#endif } #endif @@ -184,9 +177,7 @@ static __init int iommu_setup(char *p) swiotlb = 1; #endif -#ifdef CONFIG_GART_IOMMU gart_parse_options(p); -#endif #ifdef CONFIG_CALGARY_IOMMU if (!strncmp(p, "calgary", 7)) @@ -500,17 +491,13 @@ EXPORT_SYMBOL(dma_free_coherent); static int __init pci_iommu_init(void) { -#ifdef CONFIG_CALGARY_IOMMU calgary_iommu_init(); -#endif intel_iommu_init(); amd_iommu_init(); -#ifdef CONFIG_GART_IOMMU gart_iommu_init(); -#endif no_iommu_init(); return 0; diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index c3fe78406d1..be60961f869 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -32,6 +32,7 @@ #include <asm/mtrr.h> #include <asm/pgtable.h> #include <asm/proto.h> +#include <asm/iommu.h> #include <asm/gart.h> #include <asm/cacheflush.h> #include <asm/swiotlb.h> diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index aec43d56f49..792b9179eff 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -7,7 +7,7 @@ #include <linux/dma-mapping.h> #include <linux/scatterlist.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/processor.h> #include <asm/dma.h> diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c index 82299cd1d04..20df839b9c2 100644 --- a/arch/x86/kernel/pci-swiotlb_64.c +++ b/arch/x86/kernel/pci-swiotlb_64.c @@ -5,7 +5,7 @@ #include <linux/module.h> #include <linux/dma-mapping.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/swiotlb.h> #include <asm/dma.h> diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 4d629c62f4f..7fc4d5b0a6a 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -15,6 +15,7 @@ unsigned long idle_nomwait; EXPORT_SYMBOL(idle_nomwait); struct kmem_cache *task_xstate_cachep; +static int force_mwait __cpuinitdata; int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { @@ -199,6 +200,7 @@ static void poll_idle(void) * * idle=mwait overrides this decision and forces the usage of mwait. */ +static int __cpuinitdata force_mwait; #define MWAIT_INFO 0x05 #define MWAIT_ECX_EXTENDED_INFO 0x01 @@ -326,6 +328,9 @@ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c) static int __init idle_setup(char *str) { + if (!str) + return -EINVAL; + if (!strcmp(str, "poll")) { printk("using polling idle threads.\n"); pm_idle = poll_idle; diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index a8e53626ac9..e8a8e1b9981 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -537,8 +537,8 @@ static inline void __switch_to_xtra(struct task_struct *prev_p, struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct *next_p) { - struct thread_struct *prev = &prev_p->thread, - *next = &next_p->thread; + struct thread_struct *prev = &prev_p->thread; + struct thread_struct *next = &next_p->thread; int cpu = smp_processor_id(); struct tss_struct *tss = &per_cpu(init_tss, cpu); unsigned fsindex, gsindex; @@ -586,35 +586,34 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) /* * Switch FS and GS. + * + * Segment register != 0 always requires a reload. Also + * reload when it has changed. When prev process used 64bit + * base always reload to avoid an information leak. */ - { - /* segment register != 0 always requires a reload. - also reload when it has changed. - when prev process used 64bit base always reload - to avoid an information leak. */ - if (unlikely(fsindex | next->fsindex | prev->fs)) { - loadsegment(fs, next->fsindex); - /* check if the user used a selector != 0 - * if yes clear 64bit base, since overloaded base - * is always mapped to the Null selector - */ - if (fsindex) + if (unlikely(fsindex | next->fsindex | prev->fs)) { + loadsegment(fs, next->fsindex); + /* + * Check if the user used a selector != 0; if yes + * clear 64bit base, since overloaded base is always + * mapped to the Null selector + */ + if (fsindex) prev->fs = 0; - } - /* when next process has a 64bit base use it */ - if (next->fs) - wrmsrl(MSR_FS_BASE, next->fs); - prev->fsindex = fsindex; - - if (unlikely(gsindex | next->gsindex | prev->gs)) { - load_gs_index(next->gsindex); - if (gsindex) + } + /* when next process has a 64bit base use it */ + if (next->fs) + wrmsrl(MSR_FS_BASE, next->fs); + prev->fsindex = fsindex; + + if (unlikely(gsindex | next->gsindex | prev->gs)) { + load_gs_index(next->gsindex); + if (gsindex) prev->gs = 0; - } - if (next->gs) - wrmsrl(MSR_KERNEL_GS_BASE, next->gs); - prev->gsindex = gsindex; } + if (next->gs) + wrmsrl(MSR_KERNEL_GS_BASE, next->gs); + prev->gsindex = gsindex; /* Must be after DS reload */ unlazy_fpu(prev_p); @@ -627,7 +626,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) write_pda(pcurrent, next_p); write_pda(kernelstack, - (unsigned long)task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET); + (unsigned long)task_stack_page(next_p) + + THREAD_SIZE - PDA_STACKOFFSET); #ifdef CONFIG_CC_STACKPROTECTOR write_pda(stack_canary, next_p->stack_canary); /* diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 77040b6070e..e37dccce85d 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -1357,8 +1357,6 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task) #endif } -#ifdef CONFIG_X86_32 - void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) { struct siginfo info; @@ -1377,89 +1375,10 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) force_sig_info(SIGTRAP, &info, tsk); } -/* notification of system call entry/exit - * - triggered by current->work.syscall_trace - */ -int do_syscall_trace(struct pt_regs *regs, int entryexit) -{ - int is_sysemu = test_thread_flag(TIF_SYSCALL_EMU); - /* - * With TIF_SYSCALL_EMU set we want to ignore TIF_SINGLESTEP for syscall - * interception - */ - int is_singlestep = !is_sysemu && test_thread_flag(TIF_SINGLESTEP); - int ret = 0; - - /* do the secure computing check first */ - if (!entryexit) - secure_computing(regs->orig_ax); - - if (unlikely(current->audit_context)) { - if (entryexit) - audit_syscall_exit(AUDITSC_RESULT(regs->ax), - regs->ax); - /* Debug traps, when using PTRACE_SINGLESTEP, must be sent only - * on the syscall exit path. Normally, when TIF_SYSCALL_AUDIT is - * not used, entry.S will call us only on syscall exit, not - * entry; so when TIF_SYSCALL_AUDIT is used we must avoid - * calling send_sigtrap() on syscall entry. - * - * Note that when PTRACE_SYSEMU_SINGLESTEP is used, - * is_singlestep is false, despite his name, so we will still do - * the correct thing. - */ - else if (is_singlestep) - goto out; - } - - if (!(current->ptrace & PT_PTRACED)) - goto out; - - /* If a process stops on the 1st tracepoint with SYSCALL_TRACE - * and then is resumed with SYSEMU_SINGLESTEP, it will come in - * here. We have to check this and return */ - if (is_sysemu && entryexit) - return 0; - - /* Fake a debug trap */ - if (is_singlestep) - send_sigtrap(current, regs, 0); - - if (!test_thread_flag(TIF_SYSCALL_TRACE) && !is_sysemu) - goto out; - - /* the 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ - /* Note that the debugger could change the result of test_thread_flag!*/ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) ? 0x80:0)); - - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } - ret = is_sysemu; -out: - if (unlikely(current->audit_context) && !entryexit) - audit_syscall_entry(AUDIT_ARCH_I386, regs->orig_ax, - regs->bx, regs->cx, regs->dx, regs->si); - if (ret == 0) - return 0; - - regs->orig_ax = -1; /* force skip of syscall restarting */ - if (unlikely(current->audit_context)) - audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax); - return 1; -} - -#else /* CONFIG_X86_64 */ - static void syscall_trace(struct pt_regs *regs) { + if (!(current->ptrace & PT_PTRACED)) + return; #if 0 printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n", @@ -1481,39 +1400,81 @@ static void syscall_trace(struct pt_regs *regs) } } -asmlinkage void syscall_trace_enter(struct pt_regs *regs) +#ifdef CONFIG_X86_32 +# define IS_IA32 1 +#elif defined CONFIG_IA32_EMULATION +# define IS_IA32 test_thread_flag(TIF_IA32) +#else +# define IS_IA32 0 +#endif + +/* + * We must return the syscall number to actually look up in the table. + * This can be -1L to skip running any syscall at all. + */ +asmregparm long syscall_trace_enter(struct pt_regs *regs) { + long ret = 0; + + /* + * If we stepped into a sysenter/syscall insn, it trapped in + * kernel mode; do_debug() cleared TF and set TIF_SINGLESTEP. + * If user-mode had set TF itself, then it's still clear from + * do_debug() and we need to set it again to restore the user + * state. If we entered on the slow path, TF was already set. + */ + if (test_thread_flag(TIF_SINGLESTEP)) + regs->flags |= X86_EFLAGS_TF; + /* do the secure computing check first */ secure_computing(regs->orig_ax); - if (test_thread_flag(TIF_SYSCALL_TRACE) - && (current->ptrace & PT_PTRACED)) + if (unlikely(test_thread_flag(TIF_SYSCALL_EMU))) + ret = -1L; + + if (ret || test_thread_flag(TIF_SYSCALL_TRACE)) syscall_trace(regs); if (unlikely(current->audit_context)) { - if (test_thread_flag(TIF_IA32)) { + if (IS_IA32) audit_syscall_entry(AUDIT_ARCH_I386, regs->orig_ax, regs->bx, regs->cx, regs->dx, regs->si); - } else { +#ifdef CONFIG_X86_64 + else audit_syscall_entry(AUDIT_ARCH_X86_64, regs->orig_ax, regs->di, regs->si, regs->dx, regs->r10); - } +#endif } + + return ret ?: regs->orig_ax; } -asmlinkage void syscall_trace_leave(struct pt_regs *regs) +asmregparm void syscall_trace_leave(struct pt_regs *regs) { if (unlikely(current->audit_context)) audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax); - if ((test_thread_flag(TIF_SYSCALL_TRACE) - || test_thread_flag(TIF_SINGLESTEP)) - && (current->ptrace & PT_PTRACED)) + if (test_thread_flag(TIF_SYSCALL_TRACE)) syscall_trace(regs); -} -#endif /* CONFIG_X86_32 */ + /* + * If TIF_SYSCALL_EMU is set, we only get here because of + * TIF_SINGLESTEP (i.e. this is PTRACE_SYSEMU_SINGLESTEP). + * We already reported this syscall instruction in + * syscall_trace_enter(), so don't do any more now. + */ + if (unlikely(test_thread_flag(TIF_SYSCALL_EMU))) + return; + + /* + * If we are single-stepping, synthesize a trap to follow the + * system call instruction. + */ + if (test_thread_flag(TIF_SINGLESTEP) && + (current->ptrace & PT_PTRACED)) + send_sigtrap(current, regs, 0); +} diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index f8a62160e15..9dcf39c0297 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -177,6 +177,14 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 2400"), }, }, + { /* Handle problems with rebooting on Dell T5400's */ + .callback = set_bios_reboot, + .ident = "Dell Precision T5400", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation T5400"), + }, + }, { /* Handle problems with rebooting on HP laptops */ .callback = set_bios_reboot, .ident = "HP Compaq Laptop", diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 531b55b8e81..ec952aa5394 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -57,12 +57,8 @@ #include <linux/slab.h> #include <linux/user.h> #include <linux/delay.h> -#include <linux/highmem.h> #include <linux/kallsyms.h> -#include <linux/edd.h> -#include <linux/iscsi_ibft.h> -#include <linux/kexec.h> #include <linux/cpufreq.h> #include <linux/dma-mapping.h> #include <linux/ctype.h> @@ -96,7 +92,7 @@ #include <asm/smp.h> #include <asm/desc.h> #include <asm/dma.h> -#include <asm/gart.h> +#include <asm/iommu.h> #include <asm/mmu_context.h> #include <asm/proto.h> @@ -104,7 +100,6 @@ #include <asm/paravirt.h> #include <asm/percpu.h> -#include <asm/sections.h> #include <asm/topology.h> #include <asm/apicdef.h> #ifdef CONFIG_X86_64 @@ -579,6 +574,10 @@ static int __init setup_elfcorehdr(char *arg) early_param("elfcorehdr", setup_elfcorehdr); #endif +static struct x86_quirks default_x86_quirks __initdata; + +struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; + /* * Determine if we were loaded by an EFI loader. If so, then we have also been * passed the efi memmap, systab, etc., so we should use these data structures @@ -824,7 +823,10 @@ void __init setup_arch(char **cmdline_p) vmi_init(); #endif + paravirt_pagetable_setup_start(swapper_pg_dir); paging_init(); + paravirt_pagetable_setup_done(swapper_pg_dir); + paravirt_post_allocator_init(); #ifdef CONFIG_X86_64 map_vsyscall(); @@ -854,14 +856,6 @@ void __init setup_arch(char **cmdline_p) init_cpu_to_node(); #endif -#ifdef CONFIG_X86_NUMAQ - /* - * need to check online nodes num, call it - * here before time_init/tsc_init - */ - numaq_tsc_disable(); -#endif - init_apic_mappings(); ioapic_init_mappings(); diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c index d9237363096..07faaa5109c 100644 --- a/arch/x86/kernel/signal_32.c +++ b/arch/x86/kernel/signal_32.c @@ -212,7 +212,7 @@ asmlinkage unsigned long sys_sigreturn(unsigned long __unused) badframe: if (show_unhandled_signals && printk_ratelimit()) { - printk(KERN_INFO "%s%s[%d] bad frame in sigreturn frame:" + printk("%s%s[%d] bad frame in sigreturn frame:" "%p ip:%lx sp:%lx oeax:%lx", task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG, current->comm, task_pid_nr(current), frame, regs->ip, @@ -657,12 +657,6 @@ static void do_signal(struct pt_regs *regs) void do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags) { - /* Pending single-step? */ - if (thread_info_flags & _TIF_SINGLESTEP) { - regs->flags |= X86_EFLAGS_TF; - clear_thread_flag(TIF_SINGLESTEP); - } - /* deal with pending signal delivery */ if (thread_info_flags & _TIF_SIGPENDING) do_signal(regs); diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c index e53b267662e..bf87684474f 100644 --- a/arch/x86/kernel/signal_64.c +++ b/arch/x86/kernel/signal_64.c @@ -487,12 +487,6 @@ static void do_signal(struct pt_regs *regs) void do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags) { - /* Pending single-step? */ - if (thread_info_flags & _TIF_SINGLESTEP) { - regs->flags |= X86_EFLAGS_TF; - clear_thread_flag(TIF_SINGLESTEP); - } - #ifdef CONFIG_X86_MCE /* notify userspace of pending MCEs */ if (thread_info_flags & _TIF_MCE_NOTIFY) diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 687376ab07e..27640196eb7 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -546,8 +546,8 @@ static inline void __inquire_remote_apic(int apicid) printk(KERN_CONT "a previous APIC delivery may have failed\n"); - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid)); - apic_write_around(APIC_ICR, APIC_DM_REMRD | regs[i]); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(apicid)); + apic_write(APIC_ICR, APIC_DM_REMRD | regs[i]); timeout = 0; do { @@ -579,11 +579,11 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip) int maxlvt; /* Target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(logical_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(logical_apicid)); /* Boot on the stack */ /* Kick the second */ - apic_write_around(APIC_ICR, APIC_DM_NMI | APIC_DEST_LOGICAL); + apic_write(APIC_ICR, APIC_DM_NMI | APIC_DEST_LOGICAL); Dprintk("Waiting for send to finish...\n"); send_status = safe_apic_wait_icr_idle(); @@ -592,14 +592,9 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip) * Give the other CPU some time to accept the IPI. */ udelay(200); - /* - * Due to the Pentium erratum 3AP. - */ maxlvt = lapic_get_maxlvt(); - if (maxlvt > 3) { - apic_read_around(APIC_SPIV); + if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ apic_write(APIC_ESR, 0); - } accept_status = (apic_read(APIC_ESR) & 0xEF); Dprintk("NMI sent.\n"); @@ -625,12 +620,14 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) return send_status; } + maxlvt = lapic_get_maxlvt(); + /* * Be paranoid about clearing APIC errors. */ if (APIC_INTEGRATED(apic_version[phys_apicid])) { - apic_read_around(APIC_SPIV); - apic_write(APIC_ESR, 0); + if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ + apic_write(APIC_ESR, 0); apic_read(APIC_ESR); } @@ -639,13 +636,13 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) /* * Turn INIT on target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* * Send IPI */ - apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT - | APIC_DM_INIT); + apic_write(APIC_ICR, + APIC_INT_LEVELTRIG | APIC_INT_ASSERT | APIC_DM_INIT); Dprintk("Waiting for send to finish...\n"); send_status = safe_apic_wait_icr_idle(); @@ -655,10 +652,10 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) Dprintk("Deasserting INIT.\n"); /* Target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* Send IPI */ - apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT); + apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT); Dprintk("Waiting for send to finish...\n"); send_status = safe_apic_wait_icr_idle(); @@ -689,12 +686,10 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) */ Dprintk("#startup loops: %d.\n", num_starts); - maxlvt = lapic_get_maxlvt(); - for (j = 1; j <= num_starts; j++) { Dprintk("Sending STARTUP #%d.\n", j); - apic_read_around(APIC_SPIV); - apic_write(APIC_ESR, 0); + if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ + apic_write(APIC_ESR, 0); apic_read(APIC_ESR); Dprintk("After apic_write.\n"); @@ -703,12 +698,11 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) */ /* Target chip */ - apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); + apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid)); /* Boot on the stack */ /* Kick the second */ - apic_write_around(APIC_ICR, APIC_DM_STARTUP - | (start_eip >> 12)); + apic_write(APIC_ICR, APIC_DM_STARTUP | (start_eip >> 12)); /* * Give the other CPU some time to accept the IPI. @@ -724,13 +718,8 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip) * Give the other CPU some time to accept the IPI. */ udelay(200); - /* - * Due to the Pentium erratum 3AP. - */ - if (maxlvt > 3) { - apic_read_around(APIC_SPIV); + if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ apic_write(APIC_ESR, 0); - } accept_status = (apic_read(APIC_ESR) & 0xEF); if (send_status || accept_status) break; @@ -768,7 +757,7 @@ static void __cpuinit do_fork_idle(struct work_struct *work) * * Must be called after the _cpu_pda pointer table is initialized. */ -static int __cpuinit get_local_pda(int cpu) +int __cpuinit get_local_pda(int cpu) { struct x8664_pda *oldpda, *newpda; unsigned long size = sizeof(struct x8664_pda); @@ -1311,7 +1300,7 @@ static void __ref remove_cpu_from_maps(int cpu) cpu_clear(cpu, cpu_callout_map); cpu_clear(cpu, cpu_callin_map); /* was set by cpu_init() */ - clear_bit(cpu, (unsigned long *)&cpu_initialized); + cpu_clear(cpu, cpu_initialized); numa_remove_cpu(cpu); } @@ -1390,7 +1379,8 @@ static int __init parse_maxcpus(char *arg) { extern unsigned int maxcpus; - maxcpus = simple_strtoul(arg, NULL, 0); + if (arg) + maxcpus = simple_strtoul(arg, NULL, 0); return 0; } early_param("maxcpus", parse_maxcpus); diff --git a/arch/x86/kernel/smpcommon_32.c b/arch/x86/kernel/smpcommon_32.c deleted file mode 100644 index 8b137891791..00000000000 --- a/arch/x86/kernel/smpcommon_32.c +++ /dev/null @@ -1 +0,0 @@ - diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c index 92c20fee678..e8b9863ef8c 100644 --- a/arch/x86/kernel/step.c +++ b/arch/x86/kernel/step.c @@ -105,6 +105,20 @@ static int is_setting_trap_flag(struct task_struct *child, struct pt_regs *regs) static int enable_single_step(struct task_struct *child) { struct pt_regs *regs = task_pt_regs(child); + unsigned long oflags; + + /* + * If we stepped into a sysenter/syscall insn, it trapped in + * kernel mode; do_debug() cleared TF and set TIF_SINGLESTEP. + * If user-mode had set TF itself, then it's still clear from + * do_debug() and we need to set it again to restore the user + * state so we don't wrongly set TIF_FORCED_TF below. + * If enable_single_step() was used last and that is what + * set TIF_SINGLESTEP, then both TF and TIF_FORCED_TF are + * already set and our bookkeeping is fine. + */ + if (unlikely(test_tsk_thread_flag(child, TIF_SINGLESTEP))) + regs->flags |= X86_EFLAGS_TF; /* * Always set TIF_SINGLESTEP - this guarantees that @@ -113,11 +127,7 @@ static int enable_single_step(struct task_struct *child) */ set_tsk_thread_flag(child, TIF_SINGLESTEP); - /* - * If TF was already set, don't do anything else - */ - if (regs->flags & X86_EFLAGS_TF) - return 0; + oflags = regs->flags; /* Set TF on the kernel stack.. */ regs->flags |= X86_EFLAGS_TF; @@ -126,9 +136,22 @@ static int enable_single_step(struct task_struct *child) * ..but if TF is changed by the instruction we will trace, * don't mark it as being "us" that set it, so that we * won't clear it by hand later. + * + * Note that if we don't actually execute the popf because + * of a signal arriving right now or suchlike, we will lose + * track of the fact that it really was "us" that set it. */ - if (is_setting_trap_flag(child, regs)) + if (is_setting_trap_flag(child, regs)) { + clear_tsk_thread_flag(child, TIF_FORCED_TF); return 0; + } + + /* + * If TF was already set, check whether it was us who set it. + * If not, we should never attempt a block step. + */ + if (oflags & X86_EFLAGS_TF) + return test_tsk_thread_flag(child, TIF_FORCED_TF); set_tsk_thread_flag(child, TIF_FORCED_TF); diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c index 059ca6ee59b..ffe3c664afc 100644 --- a/arch/x86/kernel/time_32.c +++ b/arch/x86/kernel/time_32.c @@ -129,6 +129,7 @@ void __init hpet_time_init(void) */ void __init time_init(void) { + pre_time_init_hook(); tsc_init(); late_time_init = choose_time_init(); } diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c index 8a768973c4f..03df8e45e5a 100644 --- a/arch/x86/kernel/traps_32.c +++ b/arch/x86/kernel/traps_32.c @@ -58,6 +58,7 @@ #include <asm/nmi.h> #include <asm/smp.h> #include <asm/io.h> +#include <asm/traps.h> #include "mach_traps.h" @@ -77,26 +78,6 @@ char ignore_fpu_irq; gate_desc idt_table[256] __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, }; -asmlinkage void divide_error(void); -asmlinkage void debug(void); -asmlinkage void nmi(void); -asmlinkage void int3(void); -asmlinkage void overflow(void); -asmlinkage void bounds(void); -asmlinkage void invalid_op(void); -asmlinkage void device_not_available(void); -asmlinkage void coprocessor_segment_overrun(void); -asmlinkage void invalid_TSS(void); -asmlinkage void segment_not_present(void); -asmlinkage void stack_segment(void); -asmlinkage void general_protection(void); -asmlinkage void page_fault(void); -asmlinkage void coprocessor_error(void); -asmlinkage void simd_coprocessor_error(void); -asmlinkage void alignment_check(void); -asmlinkage void spurious_interrupt_bug(void); -asmlinkage void machine_check(void); - int panic_on_unrecovered_nmi; int kstack_depth_to_print = 24; static unsigned int code_bytes = 64; @@ -256,7 +237,7 @@ static const struct stacktrace_ops print_trace_ops = { static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, - unsigned long *stack, unsigned long bp, char *log_lvl) + unsigned long *stack, unsigned long bp, char *log_lvl) { dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl); printk("%s =======================\n", log_lvl); @@ -383,6 +364,54 @@ int is_valid_bugaddr(unsigned long ip) return ud2 == 0x0b0f; } +static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED; +static int die_owner = -1; +static unsigned int die_nest_count; + +unsigned __kprobes long oops_begin(void) +{ + unsigned long flags; + + oops_enter(); + + if (die_owner != raw_smp_processor_id()) { + console_verbose(); + raw_local_irq_save(flags); + __raw_spin_lock(&die_lock); + die_owner = smp_processor_id(); + die_nest_count = 0; + bust_spinlocks(1); + } else { + raw_local_irq_save(flags); + } + die_nest_count++; + return flags; +} + +void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr) +{ + bust_spinlocks(0); + die_owner = -1; + add_taint(TAINT_DIE); + __raw_spin_unlock(&die_lock); + raw_local_irq_restore(flags); + + if (!regs) + return; + + if (kexec_should_crash(current)) + crash_kexec(regs); + + if (in_interrupt()) + panic("Fatal exception in interrupt"); + + if (panic_on_oops) + panic("Fatal exception"); + + oops_exit(); + do_exit(signr); +} + int __kprobes __die(const char *str, struct pt_regs *regs, long err) { unsigned short ss; @@ -423,31 +452,9 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err) */ void die(const char *str, struct pt_regs *regs, long err) { - static struct { - raw_spinlock_t lock; - u32 lock_owner; - int lock_owner_depth; - } die = { - .lock = __RAW_SPIN_LOCK_UNLOCKED, - .lock_owner = -1, - .lock_owner_depth = 0 - }; - unsigned long flags; - - oops_enter(); - - if (die.lock_owner != raw_smp_processor_id()) { - console_verbose(); - raw_local_irq_save(flags); - __raw_spin_lock(&die.lock); - die.lock_owner = smp_processor_id(); - die.lock_owner_depth = 0; - bust_spinlocks(1); - } else { - raw_local_irq_save(flags); - } + unsigned long flags = oops_begin(); - if (++die.lock_owner_depth < 3) { + if (die_nest_count < 3) { report_bug(regs->ip, regs); if (__die(str, regs, err)) @@ -456,26 +463,7 @@ void die(const char *str, struct pt_regs *regs, long err) printk(KERN_EMERG "Recursive die() failure, output suppressed\n"); } - bust_spinlocks(0); - die.lock_owner = -1; - add_taint(TAINT_DIE); - __raw_spin_unlock(&die.lock); - raw_local_irq_restore(flags); - - if (!regs) - return; - - if (kexec_should_crash(current)) - crash_kexec(regs); - - if (in_interrupt()) - panic("Fatal exception in interrupt"); - - if (panic_on_oops) - panic("Fatal exception"); - - oops_exit(); - do_exit(SIGSEGV); + oops_end(flags, regs, SIGSEGV); } static inline void diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c index 2696a683778..3f18d73f420 100644 --- a/arch/x86/kernel/traps_64.c +++ b/arch/x86/kernel/traps_64.c @@ -51,30 +51,10 @@ #include <asm/pgalloc.h> #include <asm/proto.h> #include <asm/pda.h> +#include <asm/traps.h> #include <mach_traps.h> -asmlinkage void divide_error(void); -asmlinkage void debug(void); -asmlinkage void nmi(void); -asmlinkage void int3(void); -asmlinkage void overflow(void); -asmlinkage void bounds(void); -asmlinkage void invalid_op(void); -asmlinkage void device_not_available(void); -asmlinkage void double_fault(void); -asmlinkage void coprocessor_segment_overrun(void); -asmlinkage void invalid_TSS(void); -asmlinkage void segment_not_present(void); -asmlinkage void stack_segment(void); -asmlinkage void general_protection(void); -asmlinkage void page_fault(void); -asmlinkage void coprocessor_error(void); -asmlinkage void simd_coprocessor_error(void); -asmlinkage void alignment_check(void); -asmlinkage void spurious_interrupt_bug(void); -asmlinkage void machine_check(void); - int panic_on_unrecovered_nmi; int kstack_depth_to_print = 12; static unsigned int code_bytes = 64; @@ -355,17 +335,24 @@ static const struct stacktrace_ops print_trace_ops = { .address = print_trace_address, }; -void show_trace(struct task_struct *task, struct pt_regs *regs, - unsigned long *stack, unsigned long bp) +static void +show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, + unsigned long *stack, unsigned long bp, char *log_lvl) { printk("\nCall Trace:\n"); - dump_trace(task, regs, stack, bp, &print_trace_ops, NULL); + dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl); printk("\n"); } +void show_trace(struct task_struct *task, struct pt_regs *regs, + unsigned long *stack, unsigned long bp) +{ + show_trace_log_lvl(task, regs, stack, bp, ""); +} + static void -_show_stack(struct task_struct *task, struct pt_regs *regs, - unsigned long *sp, unsigned long bp) +show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, + unsigned long *sp, unsigned long bp, char *log_lvl) { unsigned long *stack; int i; @@ -399,12 +386,12 @@ _show_stack(struct task_struct *task, struct pt_regs *regs, printk(" %016lx", *stack++); touch_nmi_watchdog(); } - show_trace(task, regs, sp, bp); + show_trace_log_lvl(task, regs, sp, bp, log_lvl); } void show_stack(struct task_struct *task, unsigned long *sp) { - _show_stack(task, NULL, sp, 0); + show_stack_log_lvl(task, NULL, sp, 0, ""); } /* @@ -454,7 +441,8 @@ void show_registers(struct pt_regs *regs) u8 *ip; printk("Stack: "); - _show_stack(NULL, regs, (unsigned long *)sp, regs->bp); + show_stack_log_lvl(NULL, regs, (unsigned long *)sp, + regs->bp, ""); printk("\n"); printk(KERN_EMERG "Code: "); @@ -518,7 +506,7 @@ unsigned __kprobes long oops_begin(void) } void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr) -{ +{ die_owner = -1; bust_spinlocks(0); die_nest_count--; diff --git a/arch/x86/kernel/visws_quirks.c b/arch/x86/kernel/visws_quirks.c index e94bdb6add1..41e01b145c4 100644 --- a/arch/x86/kernel/visws_quirks.c +++ b/arch/x86/kernel/visws_quirks.c @@ -73,7 +73,7 @@ int is_visws_box(void) return visws_board_type >= 0; } -static int __init visws_time_init_quirk(void) +static int __init visws_time_init(void) { printk(KERN_INFO "Starting Cobalt Timer system clock\n"); @@ -93,7 +93,7 @@ static int __init visws_time_init_quirk(void) return 0; } -static int __init visws_pre_intr_init_quirk(void) +static int __init visws_pre_intr_init(void) { init_VISWS_APIC_irqs(); @@ -114,7 +114,7 @@ EXPORT_SYMBOL(sgivwfb_mem_size); long long mem_size __initdata = 0; -static char * __init visws_memory_setup_quirk(void) +static char * __init visws_memory_setup(void) { long long gfx_mem_size = 8 * MB; @@ -176,7 +176,7 @@ static void visws_machine_power_off(void) outl(PIIX_SPECIAL_STOP, 0xCFC); } -static int __init visws_get_smp_config_quirk(unsigned int early) +static int __init visws_get_smp_config(unsigned int early) { /* * Prevent MP-table parsing by the generic code: @@ -192,7 +192,7 @@ extern unsigned int __cpuinitdata maxcpus; * No problem for Linux. */ -static void __init MP_processor_info (struct mpc_config_processor *m) +static void __init MP_processor_info(struct mpc_config_processor *m) { int ver, logical_apicid; physid_mask_t apic_cpus; @@ -232,7 +232,7 @@ static void __init MP_processor_info (struct mpc_config_processor *m) apic_version[m->mpc_apicid] = ver; } -int __init visws_find_smp_config_quirk(unsigned int reserve) +static int __init visws_find_smp_config(unsigned int reserve) { struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS); unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS)); @@ -258,7 +258,17 @@ int __init visws_find_smp_config_quirk(unsigned int reserve) return 1; } -extern int visws_trap_init_quirk(void); +static int visws_trap_init(void); + +static struct x86_quirks visws_x86_quirks __initdata = { + .arch_time_init = visws_time_init, + .arch_pre_intr_init = visws_pre_intr_init, + .arch_memory_setup = visws_memory_setup, + .arch_intr_init = NULL, + .arch_trap_init = visws_trap_init, + .mach_get_smp_config = visws_get_smp_config, + .mach_find_smp_config = visws_find_smp_config, +}; void __init visws_early_detect(void) { @@ -272,16 +282,10 @@ void __init visws_early_detect(void) /* * Install special quirks for timer, interrupt and memory setup: - */ - arch_time_init_quirk = visws_time_init_quirk; - arch_pre_intr_init_quirk = visws_pre_intr_init_quirk; - arch_memory_setup_quirk = visws_memory_setup_quirk; - - /* * Fall back to generic behavior for traps: + * Override generic MP-table parsing: */ - arch_intr_init_quirk = NULL; - arch_trap_init_quirk = visws_trap_init_quirk; + x86_quirks = &visws_x86_quirks; /* * Install reboot quirks: @@ -294,12 +298,6 @@ void __init visws_early_detect(void) */ no_broadcast = 0; - /* - * Override generic MP-table parsing: - */ - mach_get_smp_config_quirk = visws_get_smp_config_quirk; - mach_find_smp_config_quirk = visws_find_smp_config_quirk; - #ifdef CONFIG_X86_IO_APIC /* * Turn off IO-APIC detection and initialization: @@ -426,7 +424,7 @@ static __init void cobalt_init(void) co_apic_read(CO_APIC_ID)); } -int __init visws_trap_init_quirk(void) +static int __init visws_trap_init(void) { lithium_init(); cobalt_init(); diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c index b15346092b7..0a1b1a9d922 100644 --- a/arch/x86/kernel/vmi_32.c +++ b/arch/x86/kernel/vmi_32.c @@ -906,7 +906,6 @@ static inline int __init activate_vmi(void) #ifdef CONFIG_X86_LOCAL_APIC para_fill(pv_apic_ops.apic_read, APICRead); para_fill(pv_apic_ops.apic_write, APICWrite); - para_fill(pv_apic_ops.apic_write_atomic, APICWrite); #endif /* diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index c97d35c218d..d0e940bb6f4 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -2,7 +2,8 @@ # Makefile for Kernel-based Virtual Machine module # -common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o) +common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \ + coalesced_mmio.o) ifeq ($(CONFIG_KVM_TRACE),y) common-objs += $(addprefix ../../../virt/kvm/, kvm_trace.o) endif diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 3829aa7b663..c0f7872a912 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -91,7 +91,7 @@ static void pit_set_gate(struct kvm *kvm, int channel, u32 val) c->gate = val; } -int pit_get_gate(struct kvm *kvm, int channel) +static int pit_get_gate(struct kvm *kvm, int channel) { WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock)); @@ -193,19 +193,16 @@ static void pit_latch_status(struct kvm *kvm, int channel) } } -int __pit_timer_fn(struct kvm_kpit_state *ps) +static int __pit_timer_fn(struct kvm_kpit_state *ps) { struct kvm_vcpu *vcpu0 = ps->pit->kvm->vcpus[0]; struct kvm_kpit_timer *pt = &ps->pit_timer; - atomic_inc(&pt->pending); - smp_mb__after_atomic_inc(); - if (vcpu0) { + if (!atomic_inc_and_test(&pt->pending)) set_bit(KVM_REQ_PENDING_TIMER, &vcpu0->requests); - if (waitqueue_active(&vcpu0->wq)) { - vcpu0->arch.mp_state = KVM_MP_STATE_RUNNABLE; - wake_up_interruptible(&vcpu0->wq); - } + if (vcpu0 && waitqueue_active(&vcpu0->wq)) { + vcpu0->arch.mp_state = KVM_MP_STATE_RUNNABLE; + wake_up_interruptible(&vcpu0->wq); } pt->timer.expires = ktime_add_ns(pt->timer.expires, pt->period); @@ -308,6 +305,7 @@ static void pit_load_count(struct kvm *kvm, int channel, u32 val) create_pit_timer(&ps->pit_timer, val, 0); break; case 2: + case 3: create_pit_timer(&ps->pit_timer, val, 1); break; default: @@ -459,7 +457,8 @@ static void pit_ioport_read(struct kvm_io_device *this, mutex_unlock(&pit_state->lock); } -static int pit_in_range(struct kvm_io_device *this, gpa_t addr) +static int pit_in_range(struct kvm_io_device *this, gpa_t addr, + int len, int is_write) { return ((addr >= KVM_PIT_BASE_ADDRESS) && (addr < KVM_PIT_BASE_ADDRESS + KVM_PIT_MEM_LENGTH)); @@ -500,7 +499,8 @@ static void speaker_ioport_read(struct kvm_io_device *this, mutex_unlock(&pit_state->lock); } -static int speaker_in_range(struct kvm_io_device *this, gpa_t addr) +static int speaker_in_range(struct kvm_io_device *this, gpa_t addr, + int len, int is_write) { return (addr == KVM_SPEAKER_BASE_ADDRESS); } @@ -575,7 +575,7 @@ void kvm_free_pit(struct kvm *kvm) } } -void __inject_pit_timer_intr(struct kvm *kvm) +static void __inject_pit_timer_intr(struct kvm *kvm) { mutex_lock(&kvm->lock); kvm_ioapic_set_irq(kvm->arch.vioapic, 0, 1); diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index ab29cf2def4..c31164e8aa4 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -130,8 +130,10 @@ void kvm_pic_set_irq(void *opaque, int irq, int level) { struct kvm_pic *s = opaque; - pic_set_irq1(&s->pics[irq >> 3], irq & 7, level); - pic_update_irq(s); + if (irq >= 0 && irq < PIC_NUM_PINS) { + pic_set_irq1(&s->pics[irq >> 3], irq & 7, level); + pic_update_irq(s); + } } /* @@ -346,7 +348,8 @@ static u32 elcr_ioport_read(void *opaque, u32 addr1) return s->elcr; } -static int picdev_in_range(struct kvm_io_device *this, gpa_t addr) +static int picdev_in_range(struct kvm_io_device *this, gpa_t addr, + int len, int is_write) { switch (addr) { case 0x20: diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index 2a15be2275c..7ca47cbb48b 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -30,6 +30,8 @@ #include "ioapic.h" #include "lapic.h" +#define PIC_NUM_PINS 16 + struct kvm; struct kvm_vcpu; diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index ebc03f5ae16..73f43de69f6 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -356,8 +356,9 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, case APIC_DM_SMI: printk(KERN_DEBUG "Ignoring guest SMI\n"); break; + case APIC_DM_NMI: - printk(KERN_DEBUG "Ignoring guest NMI\n"); + kvm_inject_nmi(vcpu); break; case APIC_DM_INIT: @@ -572,6 +573,8 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) { u32 val = 0; + KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); + if (offset >= LAPIC_MMIO_LENGTH) return 0; @@ -695,6 +698,8 @@ static void apic_mmio_write(struct kvm_io_device *this, offset &= 0xff0; + KVMTRACE_1D(APIC_ACCESS, apic->vcpu, (u32)offset, handler); + switch (offset) { case APIC_ID: /* Local APIC ID */ apic_set_reg(apic, APIC_ID, val); @@ -780,7 +785,8 @@ static void apic_mmio_write(struct kvm_io_device *this, } -static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr) +static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr, + int len, int size) { struct kvm_lapic *apic = (struct kvm_lapic *)this->private; int ret = 0; @@ -939,8 +945,8 @@ static int __apic_timer_fn(struct kvm_lapic *apic) int result = 0; wait_queue_head_t *q = &apic->vcpu->wq; - atomic_inc(&apic->timer.pending); - set_bit(KVM_REQ_PENDING_TIMER, &apic->vcpu->requests); + if(!atomic_inc_and_test(&apic->timer.pending)) + set_bit(KVM_REQ_PENDING_TIMER, &apic->vcpu->requests); if (waitqueue_active(q)) { apic->vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; wake_up_interruptible(q); diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index 676c396c9ce..81858881287 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -31,6 +31,7 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu); u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu); void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8); void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value); +u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu); int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest); int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda); diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 7e7c3969f7a..b0e4ddca6c1 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -66,7 +66,8 @@ static void kvm_mmu_audit(struct kvm_vcpu *vcpu, const char *msg) {} #endif #if defined(MMU_DEBUG) || defined(AUDIT) -static int dbg = 1; +static int dbg = 0; +module_param(dbg, bool, 0644); #endif #ifndef MMU_DEBUG @@ -776,6 +777,15 @@ static void mmu_page_remove_parent_pte(struct kvm_mmu_page *sp, BUG(); } +static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu, + struct kvm_mmu_page *sp) +{ + int i; + + for (i = 0; i < PT64_ENT_PER_PAGE; ++i) + sp->spt[i] = shadow_trap_nonpresent_pte; +} + static struct kvm_mmu_page *kvm_mmu_lookup_page(struct kvm *kvm, gfn_t gfn) { unsigned index; @@ -841,7 +851,10 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, hlist_add_head(&sp->hash_link, bucket); if (!metaphysical) rmap_write_protect(vcpu->kvm, gfn); - vcpu->arch.mmu.prefetch_page(vcpu, sp); + if (shadow_trap_nonpresent_pte != shadow_notrap_nonpresent_pte) + vcpu->arch.mmu.prefetch_page(vcpu, sp); + else + nonpaging_prefetch_page(vcpu, sp); return sp; } @@ -917,14 +930,17 @@ static void kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp) } kvm_mmu_page_unlink_children(kvm, sp); if (!sp->root_count) { - if (!sp->role.metaphysical) + if (!sp->role.metaphysical && !sp->role.invalid) unaccount_shadowed(kvm, sp->gfn); hlist_del(&sp->hash_link); kvm_mmu_free_page(kvm, sp); } else { + int invalid = sp->role.invalid; list_move(&sp->link, &kvm->arch.active_mmu_pages); sp->role.invalid = 1; kvm_reload_remote_mmus(kvm); + if (!sp->role.metaphysical && !invalid) + unaccount_shadowed(kvm, sp->gfn); } kvm_mmu_reset_last_pte_updated(kvm); } @@ -1103,7 +1119,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, mark_page_dirty(vcpu->kvm, gfn); pgprintk("%s: setting spte %llx\n", __func__, spte); - pgprintk("instantiating %s PTE (%s) at %d (%llx) addr %llx\n", + pgprintk("instantiating %s PTE (%s) at %ld (%llx) addr %p\n", (spte&PT_PAGE_SIZE_MASK)? "2MB" : "4kB", (spte&PT_WRITABLE_MASK)?"RW":"R", gfn, spte, shadow_pte); set_shadow_pte(shadow_pte, spte); @@ -1122,8 +1138,10 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte, else kvm_release_pfn_clean(pfn); } - if (!ptwrite || !*ptwrite) + if (speculative) { vcpu->arch.last_pte_updated = shadow_pte; + vcpu->arch.last_pte_gfn = gfn; + } } static void nonpaging_new_cr3(struct kvm_vcpu *vcpu) @@ -1171,9 +1189,10 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write, return -ENOMEM; } - table[index] = __pa(new_table->spt) - | PT_PRESENT_MASK | PT_WRITABLE_MASK - | shadow_user_mask | shadow_x_mask; + set_shadow_pte(&table[index], + __pa(new_table->spt) + | PT_PRESENT_MASK | PT_WRITABLE_MASK + | shadow_user_mask | shadow_x_mask); } table_addr = table[index] & PT64_BASE_ADDR_MASK; } @@ -1211,15 +1230,6 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, int write, gfn_t gfn) } -static void nonpaging_prefetch_page(struct kvm_vcpu *vcpu, - struct kvm_mmu_page *sp) -{ - int i; - - for (i = 0; i < PT64_ENT_PER_PAGE; ++i) - sp->spt[i] = shadow_trap_nonpresent_pte; -} - static void mmu_free_roots(struct kvm_vcpu *vcpu) { int i; @@ -1671,6 +1681,18 @@ static void mmu_guess_page_from_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, vcpu->arch.update_pte.pfn = pfn; } +static void kvm_mmu_access_page(struct kvm_vcpu *vcpu, gfn_t gfn) +{ + u64 *spte = vcpu->arch.last_pte_updated; + + if (spte + && vcpu->arch.last_pte_gfn == gfn + && shadow_accessed_mask + && !(*spte & shadow_accessed_mask) + && is_shadow_present_pte(*spte)) + set_bit(PT_ACCESSED_SHIFT, (unsigned long *)spte); +} + void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new, int bytes) { @@ -1694,6 +1716,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, pgprintk("%s: gpa %llx bytes %d\n", __func__, gpa, bytes); mmu_guess_page_from_pte_write(vcpu, gpa, new, bytes); spin_lock(&vcpu->kvm->mmu_lock); + kvm_mmu_access_page(vcpu, gfn); kvm_mmu_free_some_pages(vcpu); ++vcpu->kvm->stat.mmu_pte_write; kvm_mmu_audit(vcpu, "pre pte write"); @@ -1948,7 +1971,7 @@ void kvm_mmu_zap_all(struct kvm *kvm) kvm_flush_remote_tlbs(kvm); } -void kvm_mmu_remove_one_alloc_mmu_page(struct kvm *kvm) +static void kvm_mmu_remove_one_alloc_mmu_page(struct kvm *kvm) { struct kvm_mmu_page *page; @@ -1968,6 +1991,8 @@ static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask) list_for_each_entry(kvm, &vm_list, vm_list) { int npages; + if (!down_read_trylock(&kvm->slots_lock)) + continue; spin_lock(&kvm->mmu_lock); npages = kvm->arch.n_alloc_mmu_pages - kvm->arch.n_free_mmu_pages; @@ -1980,6 +2005,7 @@ static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask) nr_to_scan--; spin_unlock(&kvm->mmu_lock); + up_read(&kvm->slots_lock); } if (kvm_freed) list_move_tail(&kvm_freed->vm_list, &vm_list); diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 1730757bbc7..258e5d56298 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -15,7 +15,8 @@ #define PT_USER_MASK (1ULL << 2) #define PT_PWT_MASK (1ULL << 3) #define PT_PCD_MASK (1ULL << 4) -#define PT_ACCESSED_MASK (1ULL << 5) +#define PT_ACCESSED_SHIFT 5 +#define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT) #define PT_DIRTY_MASK (1ULL << 6) #define PT_PAGE_SIZE_MASK (1ULL << 7) #define PT_PAT_MASK (1ULL << 7) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 934c7b61939..4d918220bae 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -460,8 +460,9 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr) static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) { - int i, offset = 0, r = 0; - pt_element_t pt; + int i, j, offset, r; + pt_element_t pt[256 / sizeof(pt_element_t)]; + gpa_t pte_gpa; if (sp->role.metaphysical || (PTTYPE == 32 && sp->role.level > PT_PAGE_TABLE_LEVEL)) { @@ -469,19 +470,20 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu, return; } - if (PTTYPE == 32) + pte_gpa = gfn_to_gpa(sp->gfn); + if (PTTYPE == 32) { offset = sp->role.quadrant << PT64_LEVEL_BITS; + pte_gpa += offset * sizeof(pt_element_t); + } - for (i = 0; i < PT64_ENT_PER_PAGE; ++i) { - gpa_t pte_gpa = gfn_to_gpa(sp->gfn); - pte_gpa += (i+offset) * sizeof(pt_element_t); - - r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &pt, - sizeof(pt_element_t)); - if (r || is_present_pte(pt)) - sp->spt[i] = shadow_trap_nonpresent_pte; - else - sp->spt[i] = shadow_notrap_nonpresent_pte; + for (i = 0; i < PT64_ENT_PER_PAGE; i += ARRAY_SIZE(pt)) { + r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, pt, sizeof pt); + pte_gpa += ARRAY_SIZE(pt) * sizeof(pt_element_t); + for (j = 0; j < ARRAY_SIZE(pt); ++j) + if (r || is_present_pte(pt[j])) + sp->spt[i+j] = shadow_trap_nonpresent_pte; + else + sp->spt[i+j] = shadow_notrap_nonpresent_pte; } } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 6b0d5fa5bab..b756e876dce 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -27,6 +27,8 @@ #include <asm/desc.h> +#define __ex(x) __kvm_handle_fault_on_reboot(x) + MODULE_AUTHOR("Qumranet"); MODULE_LICENSE("GPL"); @@ -129,17 +131,17 @@ static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq) static inline void clgi(void) { - asm volatile (SVM_CLGI); + asm volatile (__ex(SVM_CLGI)); } static inline void stgi(void) { - asm volatile (SVM_STGI); + asm volatile (__ex(SVM_STGI)); } static inline void invlpga(unsigned long addr, u32 asid) { - asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid)); + asm volatile (__ex(SVM_INVLPGA) :: "a"(addr), "c"(asid)); } static inline unsigned long kvm_read_cr2(void) @@ -270,19 +272,11 @@ static int has_svm(void) static void svm_hardware_disable(void *garbage) { - struct svm_cpu_data *svm_data - = per_cpu(svm_data, raw_smp_processor_id()); - - if (svm_data) { - uint64_t efer; + uint64_t efer; - wrmsrl(MSR_VM_HSAVE_PA, 0); - rdmsrl(MSR_EFER, efer); - wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK); - per_cpu(svm_data, raw_smp_processor_id()) = NULL; - __free_page(svm_data->save_area); - kfree(svm_data); - } + wrmsrl(MSR_VM_HSAVE_PA, 0); + rdmsrl(MSR_EFER, efer); + wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK); } static void svm_hardware_enable(void *garbage) @@ -321,6 +315,19 @@ static void svm_hardware_enable(void *garbage) page_to_pfn(svm_data->save_area) << PAGE_SHIFT); } +static void svm_cpu_uninit(int cpu) +{ + struct svm_cpu_data *svm_data + = per_cpu(svm_data, raw_smp_processor_id()); + + if (!svm_data) + return; + + per_cpu(svm_data, raw_smp_processor_id()) = NULL; + __free_page(svm_data->save_area); + kfree(svm_data); +} + static int svm_cpu_init(int cpu) { struct svm_cpu_data *svm_data; @@ -458,6 +465,11 @@ err: static __exit void svm_hardware_unsetup(void) { + int cpu; + + for_each_online_cpu(cpu) + svm_cpu_uninit(cpu); + __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); iopm_base = 0; } @@ -707,10 +719,6 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu) rdtscll(vcpu->arch.host_tsc); } -static void svm_vcpu_decache(struct kvm_vcpu *vcpu) -{ -} - static void svm_cache_regs(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); @@ -949,7 +957,9 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *svm_data) static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr) { - return to_svm(vcpu)->db_regs[dr]; + unsigned long val = to_svm(vcpu)->db_regs[dr]; + KVMTRACE_2D(DR_READ, vcpu, (u32)dr, (u32)val, handler); + return val; } static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value, @@ -1004,6 +1014,16 @@ static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) fault_address = svm->vmcb->control.exit_info_2; error_code = svm->vmcb->control.exit_info_1; + + if (!npt_enabled) + KVMTRACE_3D(PAGE_FAULT, &svm->vcpu, error_code, + (u32)fault_address, (u32)(fault_address >> 32), + handler); + else + KVMTRACE_3D(TDP_FAULT, &svm->vcpu, error_code, + (u32)fault_address, (u32)(fault_address >> 32), + handler); + return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code); } @@ -1081,6 +1101,19 @@ static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port); } +static int nmi_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) +{ + KVMTRACE_0D(NMI, &svm->vcpu, handler); + return 1; +} + +static int intr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) +{ + ++svm->vcpu.stat.irq_exits; + KVMTRACE_0D(INTR, &svm->vcpu, handler); + return 1; +} + static int nop_on_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) { return 1; @@ -1219,6 +1252,9 @@ static int rdmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) if (svm_get_msr(&svm->vcpu, ecx, &data)) kvm_inject_gp(&svm->vcpu, 0); else { + KVMTRACE_3D(MSR_READ, &svm->vcpu, ecx, (u32)data, + (u32)(data >> 32), handler); + svm->vmcb->save.rax = data & 0xffffffff; svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32; svm->next_rip = svm->vmcb->save.rip + 2; @@ -1284,16 +1320,19 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) case MSR_K7_EVNTSEL1: case MSR_K7_EVNTSEL2: case MSR_K7_EVNTSEL3: + case MSR_K7_PERFCTR0: + case MSR_K7_PERFCTR1: + case MSR_K7_PERFCTR2: + case MSR_K7_PERFCTR3: /* - * only support writing 0 to the performance counters for now - * to make Windows happy. Should be replaced by a real - * performance counter emulation later. + * Just discard all writes to the performance counters; this + * should keep both older linux and windows 64-bit guests + * happy */ - if (data != 0) - goto unhandled; + pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", ecx, data); + break; default: - unhandled: return kvm_set_msr_common(vcpu, ecx, data); } return 0; @@ -1304,6 +1343,10 @@ static int wrmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; u64 data = (svm->vmcb->save.rax & -1u) | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32); + + KVMTRACE_3D(MSR_WRITE, &svm->vcpu, ecx, (u32)data, (u32)(data >> 32), + handler); + svm->next_rip = svm->vmcb->save.rip + 2; if (svm_set_msr(&svm->vcpu, ecx, data)) kvm_inject_gp(&svm->vcpu, 0); @@ -1323,6 +1366,8 @@ static int msr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) static int interrupt_window_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run) { + KVMTRACE_0D(PEND_INTR, &svm->vcpu, handler); + svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR); svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; /* @@ -1364,8 +1409,8 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm, [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, - [SVM_EXIT_INTR] = nop_on_interception, - [SVM_EXIT_NMI] = nop_on_interception, + [SVM_EXIT_INTR] = intr_interception, + [SVM_EXIT_NMI] = nmi_interception, [SVM_EXIT_SMI] = nop_on_interception, [SVM_EXIT_INIT] = nop_on_interception, [SVM_EXIT_VINTR] = interrupt_window_interception, @@ -1397,6 +1442,9 @@ static int handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) struct vcpu_svm *svm = to_svm(vcpu); u32 exit_code = svm->vmcb->control.exit_code; + KVMTRACE_3D(VMEXIT, vcpu, exit_code, (u32)svm->vmcb->save.rip, + (u32)((u64)svm->vmcb->save.rip >> 32), entryexit); + if (npt_enabled) { int mmu_reload = 0; if ((vcpu->arch.cr0 ^ svm->vmcb->save.cr0) & X86_CR0_PG) { @@ -1470,6 +1518,8 @@ static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) { struct vmcb_control_area *control; + KVMTRACE_1D(INJ_VIRQ, &svm->vcpu, (u32)irq, handler); + control = &svm->vmcb->control; control->int_vector = irq; control->int_ctl &= ~V_INTR_PRIO_MASK; @@ -1660,9 +1710,9 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) sync_lapic_to_cr8(vcpu); save_host_msrs(vcpu); - fs_selector = read_fs(); - gs_selector = read_gs(); - ldt_selector = read_ldt(); + fs_selector = kvm_read_fs(); + gs_selector = kvm_read_gs(); + ldt_selector = kvm_read_ldt(); svm->host_cr2 = kvm_read_cr2(); svm->host_dr6 = read_dr6(); svm->host_dr7 = read_dr7(); @@ -1716,17 +1766,17 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) /* Enter guest mode */ "push %%rax \n\t" "mov %c[vmcb](%[svm]), %%rax \n\t" - SVM_VMLOAD "\n\t" - SVM_VMRUN "\n\t" - SVM_VMSAVE "\n\t" + __ex(SVM_VMLOAD) "\n\t" + __ex(SVM_VMRUN) "\n\t" + __ex(SVM_VMSAVE) "\n\t" "pop %%rax \n\t" #else /* Enter guest mode */ "push %%eax \n\t" "mov %c[vmcb](%[svm]), %%eax \n\t" - SVM_VMLOAD "\n\t" - SVM_VMRUN "\n\t" - SVM_VMSAVE "\n\t" + __ex(SVM_VMLOAD) "\n\t" + __ex(SVM_VMRUN) "\n\t" + __ex(SVM_VMSAVE) "\n\t" "pop %%eax \n\t" #endif @@ -1795,9 +1845,9 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) write_dr7(svm->host_dr7); kvm_write_cr2(svm->host_cr2); - load_fs(fs_selector); - load_gs(gs_selector); - load_ldt(ldt_selector); + kvm_load_fs(fs_selector); + kvm_load_gs(gs_selector); + kvm_load_ldt(ldt_selector); load_host_msrs(vcpu); reload_tss(vcpu); @@ -1889,7 +1939,6 @@ static struct kvm_x86_ops svm_x86_ops = { .prepare_guest_switch = svm_prepare_guest_switch, .vcpu_load = svm_vcpu_load, .vcpu_put = svm_vcpu_put, - .vcpu_decache = svm_vcpu_decache, .set_guest_debug = svm_guest_debug, .get_msr = svm_get_msr, diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 10ce6ee4c49..0cac6370171 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -30,6 +30,8 @@ #include <asm/io.h> #include <asm/desc.h> +#define __ex(x) __kvm_handle_fault_on_reboot(x) + MODULE_AUTHOR("Qumranet"); MODULE_LICENSE("GPL"); @@ -53,6 +55,7 @@ struct vmcs { struct vcpu_vmx { struct kvm_vcpu vcpu; + struct list_head local_vcpus_link; int launched; u8 fail; u32 idt_vectoring_info; @@ -88,9 +91,11 @@ static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) } static int init_rmode(struct kvm *kvm); +static u64 construct_eptp(unsigned long root_hpa); static DEFINE_PER_CPU(struct vmcs *, vmxarea); static DEFINE_PER_CPU(struct vmcs *, current_vmcs); +static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu); static struct page *vmx_io_bitmap_a; static struct page *vmx_io_bitmap_b; @@ -260,6 +265,11 @@ static inline int cpu_has_vmx_vpid(void) SECONDARY_EXEC_ENABLE_VPID); } +static inline int cpu_has_virtual_nmis(void) +{ + return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; +} + static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) { int i; @@ -278,7 +288,7 @@ static inline void __invvpid(int ext, u16 vpid, gva_t gva) u64 gva; } operand = { vpid, 0, gva }; - asm volatile (ASM_VMX_INVVPID + asm volatile (__ex(ASM_VMX_INVVPID) /* CF==1 or ZF==1 --> rc = -1 */ "; ja 1f ; ud2 ; 1:" : : "a"(&operand), "c"(ext) : "cc", "memory"); @@ -290,7 +300,7 @@ static inline void __invept(int ext, u64 eptp, gpa_t gpa) u64 eptp, gpa; } operand = {eptp, gpa}; - asm volatile (ASM_VMX_INVEPT + asm volatile (__ex(ASM_VMX_INVEPT) /* CF==1 or ZF==1 --> rc = -1 */ "; ja 1f ; ud2 ; 1:\n" : : "a" (&operand), "c" (ext) : "cc", "memory"); @@ -311,7 +321,7 @@ static void vmcs_clear(struct vmcs *vmcs) u64 phys_addr = __pa(vmcs); u8 error; - asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0" + asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) : "cc", "memory"); if (error) @@ -329,6 +339,9 @@ static void __vcpu_clear(void *arg) if (per_cpu(current_vmcs, cpu) == vmx->vmcs) per_cpu(current_vmcs, cpu) = NULL; rdtscll(vmx->vcpu.arch.host_tsc); + list_del(&vmx->local_vcpus_link); + vmx->vcpu.cpu = -1; + vmx->launched = 0; } static void vcpu_clear(struct vcpu_vmx *vmx) @@ -336,7 +349,6 @@ static void vcpu_clear(struct vcpu_vmx *vmx) if (vmx->vcpu.cpu == -1) return; smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); - vmx->launched = 0; } static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx) @@ -378,7 +390,7 @@ static unsigned long vmcs_readl(unsigned long field) { unsigned long value; - asm volatile (ASM_VMX_VMREAD_RDX_RAX + asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) : "=a"(value) : "d"(field) : "cc"); return value; } @@ -413,7 +425,7 @@ static void vmcs_writel(unsigned long field, unsigned long value) { u8 error; - asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" + asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" : "=q"(error) : "a"(value), "d"(field) : "cc"); if (unlikely(error)) vmwrite_error(field, value); @@ -431,10 +443,8 @@ static void vmcs_write32(unsigned long field, u32 value) static void vmcs_write64(unsigned long field, u64 value) { -#ifdef CONFIG_X86_64 - vmcs_writel(field, value); -#else vmcs_writel(field, value); +#ifndef CONFIG_X86_64 asm volatile (""); vmcs_writel(field+1, value >> 32); #endif @@ -474,7 +484,7 @@ static void reload_tss(void) struct descriptor_table gdt; struct desc_struct *descs; - get_gdt(&gdt); + kvm_get_gdt(&gdt); descs = (void *)gdt.base; descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ load_TR_desc(); @@ -530,9 +540,9 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu) * Set host fs and gs selectors. Unfortunately, 22.2.3 does not * allow segment selectors with cpl > 0 or ti == 1. */ - vmx->host_state.ldt_sel = read_ldt(); + vmx->host_state.ldt_sel = kvm_read_ldt(); vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; - vmx->host_state.fs_sel = read_fs(); + vmx->host_state.fs_sel = kvm_read_fs(); if (!(vmx->host_state.fs_sel & 7)) { vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); vmx->host_state.fs_reload_needed = 0; @@ -540,7 +550,7 @@ static void vmx_save_host_state(struct kvm_vcpu *vcpu) vmcs_write16(HOST_FS_SELECTOR, 0); vmx->host_state.fs_reload_needed = 1; } - vmx->host_state.gs_sel = read_gs(); + vmx->host_state.gs_sel = kvm_read_gs(); if (!(vmx->host_state.gs_sel & 7)) vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); else { @@ -576,15 +586,15 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx) ++vmx->vcpu.stat.host_state_reload; vmx->host_state.loaded = 0; if (vmx->host_state.fs_reload_needed) - load_fs(vmx->host_state.fs_sel); + kvm_load_fs(vmx->host_state.fs_sel); if (vmx->host_state.gs_ldt_reload_needed) { - load_ldt(vmx->host_state.ldt_sel); + kvm_load_ldt(vmx->host_state.ldt_sel); /* * If we have to reload gs, we must take care to * preserve our gs base. */ local_irq_save(flags); - load_gs(vmx->host_state.gs_sel); + kvm_load_gs(vmx->host_state.gs_sel); #ifdef CONFIG_X86_64 wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE)); #endif @@ -617,13 +627,17 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) vcpu_clear(vmx); kvm_migrate_timers(vcpu); vpid_sync_vcpu_all(vmx); + local_irq_disable(); + list_add(&vmx->local_vcpus_link, + &per_cpu(vcpus_on_cpu, cpu)); + local_irq_enable(); } if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { u8 error; per_cpu(current_vmcs, cpu) = vmx->vmcs; - asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0" + asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" : "=g"(error) : "a"(&phys_addr), "m"(phys_addr) : "cc"); if (error) @@ -640,8 +654,8 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) * Linux uses per-cpu TSS and GDT, so set these when switching * processors. */ - vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */ - get_gdt(&dt); + vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ + kvm_get_gdt(&dt); vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */ rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); @@ -684,11 +698,6 @@ static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) update_exception_bitmap(vcpu); } -static void vmx_vcpu_decache(struct kvm_vcpu *vcpu) -{ - vcpu_clear(to_vmx(vcpu)); -} - static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) { return vmcs_readl(GUEST_RFLAGS); @@ -913,6 +922,18 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) case MSR_IA32_TIME_STAMP_COUNTER: guest_write_tsc(data); break; + case MSR_P6_PERFCTR0: + case MSR_P6_PERFCTR1: + case MSR_P6_EVNTSEL0: + case MSR_P6_EVNTSEL1: + /* + * Just discard all writes to the performance counters; this + * should keep both older linux and windows 64-bit guests + * happy + */ + pr_unimpl(vcpu, "unimplemented perfctr wrmsr: 0x%x data 0x%llx\n", msr_index, data); + + break; default: vmx_load_host_state(vmx); msr = find_msr_entry(vmx, msr_index); @@ -1022,6 +1043,7 @@ static void hardware_enable(void *garbage) u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); u64 old; + INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu)); rdmsrl(MSR_IA32_FEATURE_CONTROL, old); if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED)) @@ -1032,13 +1054,25 @@ static void hardware_enable(void *garbage) MSR_IA32_FEATURE_CONTROL_LOCKED | MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED); write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ - asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr) + asm volatile (ASM_VMX_VMXON_RAX + : : "a"(&phys_addr), "m"(phys_addr) : "memory", "cc"); } +static void vmclear_local_vcpus(void) +{ + int cpu = raw_smp_processor_id(); + struct vcpu_vmx *vmx, *n; + + list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu), + local_vcpus_link) + __vcpu_clear(vmx); +} + static void hardware_disable(void *garbage) { - asm volatile (ASM_VMX_VMXOFF : : : "cc"); + vmclear_local_vcpus(); + asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); write_cr4(read_cr4() & ~X86_CR4_VMXE); } @@ -1072,7 +1106,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) u32 _vmentry_control = 0; min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; - opt = 0; + opt = PIN_BASED_VIRTUAL_NMIS; if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, &_pin_based_exec_control) < 0) return -EIO; @@ -1389,6 +1423,8 @@ static void exit_lmode(struct kvm_vcpu *vcpu) static void vmx_flush_tlb(struct kvm_vcpu *vcpu) { vpid_sync_vcpu_all(to_vmx(vcpu)); + if (vm_need_ept()) + ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); } static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) @@ -1420,7 +1456,7 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, if (!(cr0 & X86_CR0_PG)) { /* From paging/starting to nonpaging */ vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, - vmcs_config.cpu_based_exec_ctrl | + vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | (CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING)); vcpu->arch.cr0 = cr0; @@ -1430,7 +1466,7 @@ static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, } else if (!is_paging(vcpu)) { /* From nonpaging to paging */ vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, - vmcs_config.cpu_based_exec_ctrl & + vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & ~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING)); vcpu->arch.cr0 = cr0; @@ -1821,7 +1857,7 @@ static void allocate_vpid(struct vcpu_vmx *vmx) spin_unlock(&vmx_vpid_lock); } -void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr) +static void vmx_disable_intercept_for_msr(struct page *msr_bitmap, u32 msr) { void *va; @@ -1907,8 +1943,8 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ - vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */ - vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */ + vmcs_write16(HOST_FS_SELECTOR, kvm_read_fs()); /* 22.2.4 */ + vmcs_write16(HOST_GS_SELECTOR, kvm_read_gs()); /* 22.2.4 */ vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ #ifdef CONFIG_X86_64 rdmsrl(MSR_FS_BASE, a); @@ -1922,7 +1958,7 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ - get_idt(&dt); + kvm_get_idt(&dt); vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */ asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); @@ -2114,6 +2150,13 @@ static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq) irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); } +static void vmx_inject_nmi(struct kvm_vcpu *vcpu) +{ + vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, + INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); + vcpu->arch.nmi_pending = 0; +} + static void kvm_do_inject_irq(struct kvm_vcpu *vcpu) { int word_index = __ffs(vcpu->arch.irq_summary); @@ -2554,8 +2597,6 @@ static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) exit_qualification = vmcs_read64(EXIT_QUALIFICATION); offset = exit_qualification & 0xffful; - KVMTRACE_1D(APIC_ACCESS, vcpu, (u32)offset, handler); - er = emulate_instruction(vcpu, kvm_run, 0, 0, 0); if (er != EMULATE_DONE) { @@ -2639,6 +2680,19 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 1; } +static int handle_nmi_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + u32 cpu_based_vm_exec_control; + + /* clear pending NMI */ + cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); + cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; + vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); + ++vcpu->stat.nmi_window_exits; + + return 1; +} + /* * The exit handlers return 1 if the exit was handled fully and guest execution * may resume. Otherwise they set the kvm_run parameter to indicate what needs @@ -2649,6 +2703,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, [EXIT_REASON_EXCEPTION_NMI] = handle_exception, [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, + [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, [EXIT_REASON_IO_INSTRUCTION] = handle_io, [EXIT_REASON_CR_ACCESS] = handle_cr, [EXIT_REASON_DR_ACCESS] = handle_dr, @@ -2736,17 +2791,52 @@ static void enable_irq_window(struct kvm_vcpu *vcpu) vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); } +static void enable_nmi_window(struct kvm_vcpu *vcpu) +{ + u32 cpu_based_vm_exec_control; + + if (!cpu_has_virtual_nmis()) + return; + + cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); + cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; + vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); +} + +static int vmx_nmi_enabled(struct kvm_vcpu *vcpu) +{ + u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); + return !(guest_intr & (GUEST_INTR_STATE_NMI | + GUEST_INTR_STATE_MOV_SS | + GUEST_INTR_STATE_STI)); +} + +static int vmx_irq_enabled(struct kvm_vcpu *vcpu) +{ + u32 guest_intr = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); + return (!(guest_intr & (GUEST_INTR_STATE_MOV_SS | + GUEST_INTR_STATE_STI)) && + (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF)); +} + +static void enable_intr_window(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.nmi_pending) + enable_nmi_window(vcpu); + else if (kvm_cpu_has_interrupt(vcpu)) + enable_irq_window(vcpu); +} + static void vmx_intr_assist(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); - u32 idtv_info_field, intr_info_field; - int has_ext_irq, interrupt_window_open; + u32 idtv_info_field, intr_info_field, exit_intr_info_field; int vector; update_tpr_threshold(vcpu); - has_ext_irq = kvm_cpu_has_interrupt(vcpu); intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD); + exit_intr_info_field = vmcs_read32(VM_EXIT_INTR_INFO); idtv_info_field = vmx->idt_vectoring_info; if (intr_info_field & INTR_INFO_VALID_MASK) { if (idtv_info_field & INTR_INFO_VALID_MASK) { @@ -2754,8 +2844,7 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) if (printk_ratelimit()) printk(KERN_ERR "Fault when IDT_Vectoring\n"); } - if (has_ext_irq) - enable_irq_window(vcpu); + enable_intr_window(vcpu); return; } if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) { @@ -2765,30 +2854,56 @@ static void vmx_intr_assist(struct kvm_vcpu *vcpu) u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK; vmx_inject_irq(vcpu, vect); - if (unlikely(has_ext_irq)) - enable_irq_window(vcpu); + enable_intr_window(vcpu); return; } KVMTRACE_1D(REDELIVER_EVT, vcpu, idtv_info_field, handler); - vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field); + /* + * SDM 3: 25.7.1.2 + * Clear bit "block by NMI" before VM entry if a NMI delivery + * faulted. + */ + if ((idtv_info_field & VECTORING_INFO_TYPE_MASK) + == INTR_TYPE_NMI_INTR && cpu_has_virtual_nmis()) + vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, + vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & + ~GUEST_INTR_STATE_NMI); + + vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field + & ~INTR_INFO_RESVD_BITS_MASK); vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); if (unlikely(idtv_info_field & INTR_INFO_DELIVER_CODE_MASK)) vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, vmcs_read32(IDT_VECTORING_ERROR_CODE)); - if (unlikely(has_ext_irq)) - enable_irq_window(vcpu); + enable_intr_window(vcpu); return; } - if (!has_ext_irq) + if (cpu_has_virtual_nmis()) { + /* + * SDM 3: 25.7.1.2 + * Re-set bit "block by NMI" before VM entry if vmexit caused by + * a guest IRET fault. + */ + if ((exit_intr_info_field & INTR_INFO_UNBLOCK_NMI) && + (exit_intr_info_field & INTR_INFO_VECTOR_MASK) != 8) + vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, + vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | + GUEST_INTR_STATE_NMI); + else if (vcpu->arch.nmi_pending) { + if (vmx_nmi_enabled(vcpu)) + vmx_inject_nmi(vcpu); + enable_intr_window(vcpu); + return; + } + + } + if (!kvm_cpu_has_interrupt(vcpu)) return; - interrupt_window_open = - ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && - (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0); - if (interrupt_window_open) { + if (vmx_irq_enabled(vcpu)) { vector = kvm_cpu_get_interrupt(vcpu); vmx_inject_irq(vcpu, vector); kvm_timer_intr_post(vcpu, vector); @@ -2838,7 +2953,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) "push %%edx; push %%ebp;" "push %%ecx \n\t" #endif - ASM_VMX_VMWRITE_RSP_RDX "\n\t" + __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" /* Check if vmlaunch of vmresume is needed */ "cmpl $0, %c[launched](%0) \n\t" /* Load guest registers. Don't clobber flags. */ @@ -2873,9 +2988,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) #endif /* Enter guest mode */ "jne .Llaunched \n\t" - ASM_VMX_VMLAUNCH "\n\t" + __ex(ASM_VMX_VMLAUNCH) "\n\t" "jmp .Lkvm_vmx_return \n\t" - ".Llaunched: " ASM_VMX_VMRESUME "\n\t" + ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" ".Lkvm_vmx_return: " /* Save guest registers, load host registers, keep flags */ #ifdef CONFIG_X86_64 @@ -2949,7 +3064,8 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) fixup_rmode_irq(vmx); vcpu->arch.interrupt_window_open = - (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0; + (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & + (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)) == 0; asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); vmx->launched = 1; @@ -2957,7 +3073,8 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) intr_info = vmcs_read32(VM_EXIT_INTR_INFO); /* We need to handle NMIs before interrupts are enabled */ - if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) { /* nmi */ + if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200 && + (intr_info & INTR_INFO_VALID_MASK)) { KVMTRACE_0D(NMI, vcpu, handler); asm("int $2"); } @@ -2968,7 +3085,7 @@ static void vmx_free_vmcs(struct kvm_vcpu *vcpu) struct vcpu_vmx *vmx = to_vmx(vcpu); if (vmx->vmcs) { - on_each_cpu(__vcpu_clear, vmx, 1); + vcpu_clear(vmx); free_vmcs(vmx->vmcs); vmx->vmcs = NULL; } @@ -3095,7 +3212,6 @@ static struct kvm_x86_ops vmx_x86_ops = { .prepare_guest_switch = vmx_save_host_state, .vcpu_load = vmx_vcpu_load, .vcpu_put = vmx_vcpu_put, - .vcpu_decache = vmx_vcpu_decache, .set_guest_debug = set_guest_debug, .guest_debug_pre = kvm_guest_debug_pre, diff --git a/arch/x86/kvm/vmx.h b/arch/x86/kvm/vmx.h index 79d94c610df..425a13436b3 100644 --- a/arch/x86/kvm/vmx.h +++ b/arch/x86/kvm/vmx.h @@ -40,6 +40,7 @@ #define CPU_BASED_CR8_LOAD_EXITING 0x00080000 #define CPU_BASED_CR8_STORE_EXITING 0x00100000 #define CPU_BASED_TPR_SHADOW 0x00200000 +#define CPU_BASED_VIRTUAL_NMI_PENDING 0x00400000 #define CPU_BASED_MOV_DR_EXITING 0x00800000 #define CPU_BASED_UNCOND_IO_EXITING 0x01000000 #define CPU_BASED_USE_IO_BITMAPS 0x02000000 @@ -216,7 +217,7 @@ enum vmcs_field { #define EXIT_REASON_TRIPLE_FAULT 2 #define EXIT_REASON_PENDING_INTERRUPT 7 - +#define EXIT_REASON_NMI_WINDOW 8 #define EXIT_REASON_TASK_SWITCH 9 #define EXIT_REASON_CPUID 10 #define EXIT_REASON_HLT 12 @@ -251,7 +252,9 @@ enum vmcs_field { #define INTR_INFO_VECTOR_MASK 0xff /* 7:0 */ #define INTR_INFO_INTR_TYPE_MASK 0x700 /* 10:8 */ #define INTR_INFO_DELIVER_CODE_MASK 0x800 /* 11 */ +#define INTR_INFO_UNBLOCK_NMI 0x1000 /* 12 */ #define INTR_INFO_VALID_MASK 0x80000000 /* 31 */ +#define INTR_INFO_RESVD_BITS_MASK 0x7ffff000 #define VECTORING_INFO_VECTOR_MASK INTR_INFO_VECTOR_MASK #define VECTORING_INFO_TYPE_MASK INTR_INFO_INTR_TYPE_MASK @@ -259,9 +262,16 @@ enum vmcs_field { #define VECTORING_INFO_VALID_MASK INTR_INFO_VALID_MASK #define INTR_TYPE_EXT_INTR (0 << 8) /* external interrupt */ +#define INTR_TYPE_NMI_INTR (2 << 8) /* NMI */ #define INTR_TYPE_EXCEPTION (3 << 8) /* processor exception */ #define INTR_TYPE_SOFT_INTR (4 << 8) /* software interrupt */ +/* GUEST_INTERRUPTIBILITY_INFO flags. */ +#define GUEST_INTR_STATE_STI 0x00000001 +#define GUEST_INTR_STATE_MOV_SS 0x00000002 +#define GUEST_INTR_STATE_SMI 0x00000004 +#define GUEST_INTR_STATE_NMI 0x00000008 + /* * Exit Qualifications for MOV for Control Register Access */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0faa2546b1c..9f1cdb011cf 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -72,6 +72,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { { "mmio_exits", VCPU_STAT(mmio_exits) }, { "signal_exits", VCPU_STAT(signal_exits) }, { "irq_window", VCPU_STAT(irq_window_exits) }, + { "nmi_window", VCPU_STAT(nmi_window_exits) }, { "halt_exits", VCPU_STAT(halt_exits) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "hypercalls", VCPU_STAT(hypercalls) }, @@ -173,6 +174,12 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); } +void kvm_inject_nmi(struct kvm_vcpu *vcpu) +{ + vcpu->arch.nmi_pending = 1; +} +EXPORT_SYMBOL_GPL(kvm_inject_nmi); + void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) { WARN_ON(vcpu->arch.exception.pending); @@ -604,6 +611,38 @@ static void kvm_write_guest_time(struct kvm_vcpu *v) mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); } +static bool msr_mtrr_valid(unsigned msr) +{ + switch (msr) { + case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: + case MSR_MTRRfix64K_00000: + case MSR_MTRRfix16K_80000: + case MSR_MTRRfix16K_A0000: + case MSR_MTRRfix4K_C0000: + case MSR_MTRRfix4K_C8000: + case MSR_MTRRfix4K_D0000: + case MSR_MTRRfix4K_D8000: + case MSR_MTRRfix4K_E0000: + case MSR_MTRRfix4K_E8000: + case MSR_MTRRfix4K_F0000: + case MSR_MTRRfix4K_F8000: + case MSR_MTRRdefType: + case MSR_IA32_CR_PAT: + return true; + case 0x2f8: + return true; + } + return false; +} + +static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) +{ + if (!msr_mtrr_valid(msr)) + return 1; + + vcpu->arch.mtrr[msr - 0x200] = data; + return 0; +} int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) { @@ -625,8 +664,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) break; case MSR_IA32_UCODE_REV: case MSR_IA32_UCODE_WRITE: - case 0x200 ... 0x2ff: /* MTRRs */ break; + case 0x200 ... 0x2ff: + return set_msr_mtrr(vcpu, msr, data); case MSR_IA32_APICBASE: kvm_set_apic_base(vcpu, data); break; @@ -684,6 +724,15 @@ int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); } +static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) +{ + if (!msr_mtrr_valid(msr)) + return 1; + + *pdata = vcpu->arch.mtrr[msr - 0x200]; + return 0; +} + int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) { u64 data; @@ -705,11 +754,13 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_IA32_MC0_MISC+16: case MSR_IA32_UCODE_REV: case MSR_IA32_EBL_CR_POWERON: - /* MTRR registers */ - case 0xfe: - case 0x200 ... 0x2ff: data = 0; break; + case MSR_MTRRcap: + data = 0x500 | KVM_NR_VAR_MTRR; + break; + case 0x200 ... 0x2ff: + return get_msr_mtrr(vcpu, msr, pdata); case 0xcd: /* fsb frequency */ data = 3; break; @@ -817,41 +868,6 @@ out: return r; } -/* - * Make sure that a cpu that is being hot-unplugged does not have any vcpus - * cached on it. - */ -void decache_vcpus_on_cpu(int cpu) -{ - struct kvm *vm; - struct kvm_vcpu *vcpu; - int i; - - spin_lock(&kvm_lock); - list_for_each_entry(vm, &vm_list, vm_list) - for (i = 0; i < KVM_MAX_VCPUS; ++i) { - vcpu = vm->vcpus[i]; - if (!vcpu) - continue; - /* - * If the vcpu is locked, then it is running on some - * other cpu and therefore it is not cached on the - * cpu in question. - * - * If it's not locked, check the last cpu it executed - * on. - */ - if (mutex_trylock(&vcpu->mutex)) { - if (vcpu->cpu == cpu) { - kvm_x86_ops->vcpu_decache(vcpu); - vcpu->cpu = -1; - } - mutex_unlock(&vcpu->mutex); - } - } - spin_unlock(&kvm_lock); -} - int kvm_dev_ioctl_check_extension(long ext) { int r; @@ -869,6 +885,9 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_MP_STATE: r = 1; break; + case KVM_CAP_COALESCED_MMIO: + r = KVM_COALESCED_MMIO_PAGE_OFFSET; + break; case KVM_CAP_VAPIC: r = !kvm_x86_ops->cpu_has_accelerated_tpr(); break; @@ -1781,13 +1800,14 @@ static void kvm_init_msr_list(void) * Only apic need an MMIO device hook, so shortcut now.. */ static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, - gpa_t addr) + gpa_t addr, int len, + int is_write) { struct kvm_io_device *dev; if (vcpu->arch.apic) { dev = &vcpu->arch.apic->dev; - if (dev->in_range(dev, addr)) + if (dev->in_range(dev, addr, len, is_write)) return dev; } return NULL; @@ -1795,13 +1815,15 @@ static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, - gpa_t addr) + gpa_t addr, int len, + int is_write) { struct kvm_io_device *dev; - dev = vcpu_find_pervcpu_dev(vcpu, addr); + dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); if (dev == NULL) - dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); + dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, + is_write); return dev; } @@ -1869,7 +1891,7 @@ mmio: * Is this MMIO handled locally? */ mutex_lock(&vcpu->kvm->lock); - mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); + mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); if (mmio_dev) { kvm_iodevice_read(mmio_dev, gpa, bytes, val); mutex_unlock(&vcpu->kvm->lock); @@ -1924,7 +1946,7 @@ mmio: * Is this MMIO handled locally? */ mutex_lock(&vcpu->kvm->lock); - mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); + mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); if (mmio_dev) { kvm_iodevice_write(mmio_dev, gpa, bytes, val); mutex_unlock(&vcpu->kvm->lock); @@ -2020,6 +2042,7 @@ int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) int emulate_clts(struct kvm_vcpu *vcpu) { + KVMTRACE_0D(CLTS, vcpu, handler); kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); return X86EMUL_CONTINUE; } @@ -2053,21 +2076,19 @@ int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) { - static int reported; u8 opcodes[4]; unsigned long rip = vcpu->arch.rip; unsigned long rip_linear; - rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); - - if (reported) + if (!printk_ratelimit()) return; + rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); + emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu); printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); - reported = 1; } EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); @@ -2105,27 +2126,6 @@ int emulate_instruction(struct kvm_vcpu *vcpu, ? X86EMUL_MODE_PROT64 : cs_db ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; - if (vcpu->arch.emulate_ctxt.mode == X86EMUL_MODE_PROT64) { - vcpu->arch.emulate_ctxt.cs_base = 0; - vcpu->arch.emulate_ctxt.ds_base = 0; - vcpu->arch.emulate_ctxt.es_base = 0; - vcpu->arch.emulate_ctxt.ss_base = 0; - } else { - vcpu->arch.emulate_ctxt.cs_base = - get_segment_base(vcpu, VCPU_SREG_CS); - vcpu->arch.emulate_ctxt.ds_base = - get_segment_base(vcpu, VCPU_SREG_DS); - vcpu->arch.emulate_ctxt.es_base = - get_segment_base(vcpu, VCPU_SREG_ES); - vcpu->arch.emulate_ctxt.ss_base = - get_segment_base(vcpu, VCPU_SREG_SS); - } - - vcpu->arch.emulate_ctxt.gs_base = - get_segment_base(vcpu, VCPU_SREG_GS); - vcpu->arch.emulate_ctxt.fs_base = - get_segment_base(vcpu, VCPU_SREG_FS); - r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); /* Reject the instructions other than VMCALL/VMMCALL when @@ -2300,9 +2300,10 @@ static void pio_string_write(struct kvm_io_device *pio_dev, } static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, - gpa_t addr) + gpa_t addr, int len, + int is_write) { - return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); + return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write); } int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, @@ -2331,11 +2332,10 @@ int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, kvm_x86_ops->cache_regs(vcpu); memcpy(vcpu->arch.pio_data, &vcpu->arch.regs[VCPU_REGS_RAX], 4); - kvm_x86_ops->decache_regs(vcpu); kvm_x86_ops->skip_emulated_instruction(vcpu); - pio_dev = vcpu_find_pio_dev(vcpu, port); + pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); if (pio_dev) { kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); complete_pio(vcpu); @@ -2417,7 +2417,9 @@ int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, } } - pio_dev = vcpu_find_pio_dev(vcpu, port); + pio_dev = vcpu_find_pio_dev(vcpu, port, + vcpu->arch.pio.cur_count, + !vcpu->arch.pio.in); if (!vcpu->arch.pio.in) { /* string PIO write */ ret = pio_copy_data(vcpu); @@ -2600,27 +2602,41 @@ void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) { + unsigned long value; + kvm_x86_ops->decache_cr4_guest_bits(vcpu); switch (cr) { case 0: - return vcpu->arch.cr0; + value = vcpu->arch.cr0; + break; case 2: - return vcpu->arch.cr2; + value = vcpu->arch.cr2; + break; case 3: - return vcpu->arch.cr3; + value = vcpu->arch.cr3; + break; case 4: - return vcpu->arch.cr4; + value = vcpu->arch.cr4; + break; case 8: - return kvm_get_cr8(vcpu); + value = kvm_get_cr8(vcpu); + break; default: vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); return 0; } + KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, + (u32)((u64)value >> 32), handler); + + return value; } void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, unsigned long *rflags) { + KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, + (u32)((u64)val >> 32), handler); + switch (cr) { case 0: kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); @@ -2771,8 +2787,10 @@ static void vapic_exit(struct kvm_vcpu *vcpu) if (!apic || !apic->vapic_addr) return; + down_read(&vcpu->kvm->slots_lock); kvm_release_page_dirty(apic->vapic_page); mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); + up_read(&vcpu->kvm->slots_lock); } static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) @@ -2928,9 +2946,7 @@ out: post_kvm_run_save(vcpu, kvm_run); - down_read(&vcpu->kvm->slots_lock); vapic_exit(vcpu); - up_read(&vcpu->kvm->slots_lock); return r; } @@ -2942,15 +2958,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) vcpu_load(vcpu); + if (vcpu->sigset_active) + sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); + if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { kvm_vcpu_block(vcpu); - vcpu_put(vcpu); - return -EAGAIN; + r = -EAGAIN; + goto out; } - if (vcpu->sigset_active) - sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); - /* re-sync apic's tpr */ if (!irqchip_in_kernel(vcpu->kvm)) kvm_set_cr8(vcpu, kvm_run->cr8); @@ -3070,8 +3086,8 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) return 0; } -static void get_segment(struct kvm_vcpu *vcpu, - struct kvm_segment *var, int seg) +void kvm_get_segment(struct kvm_vcpu *vcpu, + struct kvm_segment *var, int seg) { kvm_x86_ops->get_segment(vcpu, var, seg); } @@ -3080,7 +3096,7 @@ void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) { struct kvm_segment cs; - get_segment(vcpu, &cs, VCPU_SREG_CS); + kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); *db = cs.db; *l = cs.l; } @@ -3094,15 +3110,15 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, vcpu_load(vcpu); - get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); - get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); - get_segment(vcpu, &sregs->es, VCPU_SREG_ES); - get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); - get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); - get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); + kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); + kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); + kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); + kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); + kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); + kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); - get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); - get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); + kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); + kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); kvm_x86_ops->get_idt(vcpu, &dt); sregs->idt.limit = dt.limit; @@ -3154,7 +3170,7 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, return 0; } -static void set_segment(struct kvm_vcpu *vcpu, +static void kvm_set_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg) { kvm_x86_ops->set_segment(vcpu, var, seg); @@ -3191,7 +3207,7 @@ static void get_segment_descritptor_dtable(struct kvm_vcpu *vcpu, if (selector & 1 << 2) { struct kvm_segment kvm_seg; - get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); + kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); if (kvm_seg.unusable) dtable->limit = 0; @@ -3297,7 +3313,7 @@ static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) { struct kvm_segment kvm_seg; - get_segment(vcpu, &kvm_seg, seg); + kvm_get_segment(vcpu, &kvm_seg, seg); return kvm_seg.selector; } @@ -3313,8 +3329,8 @@ static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, return 0; } -static int load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, - int type_bits, int seg) +int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, + int type_bits, int seg) { struct kvm_segment kvm_seg; @@ -3327,7 +3343,7 @@ static int load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, if (!kvm_seg.s) kvm_seg.unusable = 1; - set_segment(vcpu, &kvm_seg, seg); + kvm_set_segment(vcpu, &kvm_seg, seg); return 0; } @@ -3373,25 +3389,25 @@ static int load_state_from_tss32(struct kvm_vcpu *vcpu, vcpu->arch.regs[VCPU_REGS_RSI] = tss->esi; vcpu->arch.regs[VCPU_REGS_RDI] = tss->edi; - if (load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) + if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) return 1; - if (load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) + if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) return 1; - if (load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) + if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) return 1; - if (load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) + if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) return 1; - if (load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) + if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) return 1; - if (load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) + if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) return 1; - if (load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) + if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) return 1; return 0; } @@ -3432,24 +3448,24 @@ static int load_state_from_tss16(struct kvm_vcpu *vcpu, vcpu->arch.regs[VCPU_REGS_RSI] = tss->si; vcpu->arch.regs[VCPU_REGS_RDI] = tss->di; - if (load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) + if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) return 1; - if (load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) + if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) return 1; - if (load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) + if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) return 1; - if (load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) + if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) return 1; - if (load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) + if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) return 1; return 0; } -int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, +static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, struct desc_struct *cseg_desc, struct desc_struct *nseg_desc) { @@ -3472,7 +3488,7 @@ out: return ret; } -int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, +static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, struct desc_struct *cseg_desc, struct desc_struct *nseg_desc) { @@ -3502,7 +3518,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) struct desc_struct nseg_desc; int ret = 0; - get_segment(vcpu, &tr_seg, VCPU_SREG_TR); + kvm_get_segment(vcpu, &tr_seg, VCPU_SREG_TR); if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) goto out; @@ -3561,7 +3577,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); tr_seg.type = 11; - set_segment(vcpu, &tr_seg, VCPU_SREG_TR); + kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); out: kvm_x86_ops->decache_regs(vcpu); return ret; @@ -3628,15 +3644,15 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, } } - set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); - set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); - set_segment(vcpu, &sregs->es, VCPU_SREG_ES); - set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); - set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); - set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); + kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); + kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); + kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); + kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); + kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); + kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); - set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); - set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); + kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); + kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); vcpu_put(vcpu); @@ -3751,14 +3767,14 @@ void fx_init(struct kvm_vcpu *vcpu) * allocate ram with GFP_KERNEL. */ if (!used_math()) - fx_save(&vcpu->arch.host_fx_image); + kvm_fx_save(&vcpu->arch.host_fx_image); /* Initialize guest FPU by resetting ours and saving into guest's */ preempt_disable(); - fx_save(&vcpu->arch.host_fx_image); - fx_finit(); - fx_save(&vcpu->arch.guest_fx_image); - fx_restore(&vcpu->arch.host_fx_image); + kvm_fx_save(&vcpu->arch.host_fx_image); + kvm_fx_finit(); + kvm_fx_save(&vcpu->arch.guest_fx_image); + kvm_fx_restore(&vcpu->arch.host_fx_image); preempt_enable(); vcpu->arch.cr0 |= X86_CR0_ET; @@ -3775,8 +3791,8 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) return; vcpu->guest_fpu_loaded = 1; - fx_save(&vcpu->arch.host_fx_image); - fx_restore(&vcpu->arch.guest_fx_image); + kvm_fx_save(&vcpu->arch.host_fx_image); + kvm_fx_restore(&vcpu->arch.guest_fx_image); } EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); @@ -3786,8 +3802,8 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) return; vcpu->guest_fpu_loaded = 0; - fx_save(&vcpu->arch.guest_fx_image); - fx_restore(&vcpu->arch.host_fx_image); + kvm_fx_save(&vcpu->arch.guest_fx_image); + kvm_fx_restore(&vcpu->arch.host_fx_image); ++vcpu->stat.fpu_reload; } EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); @@ -4016,6 +4032,11 @@ int kvm_arch_set_memory_region(struct kvm *kvm, return 0; } +void kvm_arch_flush_shadow(struct kvm *kvm) +{ + kvm_mmu_zap_all(kvm); +} + int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) { return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 932f216d890..f2f90468f8b 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -121,7 +121,7 @@ static u16 opcode_table[256] = { 0, 0, 0, DstReg | SrcMem32 | ModRM | Mov /* movsxd (x86/64) */ , 0, 0, 0, 0, /* 0x68 - 0x6F */ - 0, 0, ImplicitOps | Mov | Stack, 0, + SrcImm | Mov | Stack, 0, SrcImmByte | Mov | Stack, 0, SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* insb, insw/insd */ SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* outsb, outsw/outsd */ /* 0x70 - 0x77 */ @@ -138,9 +138,11 @@ static u16 opcode_table[256] = { /* 0x88 - 0x8F */ ByteOp | DstMem | SrcReg | ModRM | Mov, DstMem | SrcReg | ModRM | Mov, ByteOp | DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov, - 0, ModRM | DstReg, 0, Group | Group1A, - /* 0x90 - 0x9F */ - 0, 0, 0, 0, 0, 0, 0, 0, + DstMem | SrcReg | ModRM | Mov, ModRM | DstReg, + DstReg | SrcMem | ModRM | Mov, Group | Group1A, + /* 0x90 - 0x97 */ + DstReg, DstReg, DstReg, DstReg, DstReg, DstReg, DstReg, DstReg, + /* 0x98 - 0x9F */ 0, 0, 0, 0, ImplicitOps | Stack, ImplicitOps | Stack, 0, 0, /* 0xA0 - 0xA7 */ ByteOp | DstReg | SrcMem | Mov | MemAbs, DstReg | SrcMem | Mov | MemAbs, @@ -152,7 +154,8 @@ static u16 opcode_table[256] = { ByteOp | ImplicitOps | Mov | String, ImplicitOps | Mov | String, ByteOp | ImplicitOps | String, ImplicitOps | String, /* 0xB0 - 0xBF */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + DstReg | SrcImm | Mov, 0, 0, 0, 0, 0, 0, 0, /* 0xC0 - 0xC7 */ ByteOp | DstMem | SrcImm | ModRM, DstMem | SrcImmByte | ModRM, 0, ImplicitOps | Stack, 0, 0, @@ -168,7 +171,8 @@ static u16 opcode_table[256] = { /* 0xE0 - 0xE7 */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0xE8 - 0xEF */ - ImplicitOps | Stack, SrcImm|ImplicitOps, 0, SrcImmByte|ImplicitOps, + ImplicitOps | Stack, SrcImm | ImplicitOps, + ImplicitOps, SrcImmByte | ImplicitOps, 0, 0, 0, 0, /* 0xF0 - 0xF7 */ 0, 0, 0, 0, @@ -215,7 +219,7 @@ static u16 twobyte_table[256] = { /* 0xA0 - 0xA7 */ 0, 0, 0, DstMem | SrcReg | ModRM | BitOp, 0, 0, 0, 0, /* 0xA8 - 0xAF */ - 0, 0, 0, DstMem | SrcReg | ModRM | BitOp, 0, 0, 0, 0, + 0, 0, 0, DstMem | SrcReg | ModRM | BitOp, 0, 0, ModRM, 0, /* 0xB0 - 0xB7 */ ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM, 0, DstMem | SrcReg | ModRM | BitOp, @@ -518,6 +522,39 @@ static inline void jmp_rel(struct decode_cache *c, int rel) register_address_increment(c, &c->eip, rel); } +static void set_seg_override(struct decode_cache *c, int seg) +{ + c->has_seg_override = true; + c->seg_override = seg; +} + +static unsigned long seg_base(struct x86_emulate_ctxt *ctxt, int seg) +{ + if (ctxt->mode == X86EMUL_MODE_PROT64 && seg < VCPU_SREG_FS) + return 0; + + return kvm_x86_ops->get_segment_base(ctxt->vcpu, seg); +} + +static unsigned long seg_override_base(struct x86_emulate_ctxt *ctxt, + struct decode_cache *c) +{ + if (!c->has_seg_override) + return 0; + + return seg_base(ctxt, c->seg_override); +} + +static unsigned long es_base(struct x86_emulate_ctxt *ctxt) +{ + return seg_base(ctxt, VCPU_SREG_ES); +} + +static unsigned long ss_base(struct x86_emulate_ctxt *ctxt) +{ + return seg_base(ctxt, VCPU_SREG_SS); +} + static int do_fetch_insn_byte(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops, unsigned long linear, u8 *dest) @@ -660,7 +697,7 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, { struct decode_cache *c = &ctxt->decode; u8 sib; - int index_reg = 0, base_reg = 0, scale, rip_relative = 0; + int index_reg = 0, base_reg = 0, scale; int rc = 0; if (c->rex_prefix) { @@ -731,47 +768,28 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, } if (c->modrm_rm == 2 || c->modrm_rm == 3 || (c->modrm_rm == 6 && c->modrm_mod != 0)) - if (!c->override_base) - c->override_base = &ctxt->ss_base; + if (!c->has_seg_override) + set_seg_override(c, VCPU_SREG_SS); c->modrm_ea = (u16)c->modrm_ea; } else { /* 32/64-bit ModR/M decode. */ - switch (c->modrm_rm) { - case 4: - case 12: + if ((c->modrm_rm & 7) == 4) { sib = insn_fetch(u8, 1, c->eip); index_reg |= (sib >> 3) & 7; base_reg |= sib & 7; scale = sib >> 6; - switch (base_reg) { - case 5: - if (c->modrm_mod != 0) - c->modrm_ea += c->regs[base_reg]; - else - c->modrm_ea += - insn_fetch(s32, 4, c->eip); - break; - default: + if ((base_reg & 7) == 5 && c->modrm_mod == 0) + c->modrm_ea += insn_fetch(s32, 4, c->eip); + else c->modrm_ea += c->regs[base_reg]; - } - switch (index_reg) { - case 4: - break; - default: + if (index_reg != 4) c->modrm_ea += c->regs[index_reg] << scale; - } - break; - case 5: - if (c->modrm_mod != 0) - c->modrm_ea += c->regs[c->modrm_rm]; - else if (ctxt->mode == X86EMUL_MODE_PROT64) - rip_relative = 1; - break; - default: + } else if ((c->modrm_rm & 7) == 5 && c->modrm_mod == 0) { + if (ctxt->mode == X86EMUL_MODE_PROT64) + c->rip_relative = 1; + } else c->modrm_ea += c->regs[c->modrm_rm]; - break; - } switch (c->modrm_mod) { case 0: if (c->modrm_rm == 5) @@ -785,22 +803,6 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt, break; } } - if (rip_relative) { - c->modrm_ea += c->eip; - switch (c->d & SrcMask) { - case SrcImmByte: - c->modrm_ea += 1; - break; - case SrcImm: - if (c->d & ByteOp) - c->modrm_ea += 1; - else - if (c->op_bytes == 8) - c->modrm_ea += 4; - else - c->modrm_ea += c->op_bytes; - } - } done: return rc; } @@ -838,6 +840,7 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) memset(c, 0, sizeof(struct decode_cache)); c->eip = ctxt->vcpu->arch.rip; + ctxt->cs_base = seg_base(ctxt, VCPU_SREG_CS); memcpy(c->regs, ctxt->vcpu->arch.regs, sizeof c->regs); switch (mode) { @@ -876,23 +879,15 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) /* switch between 2/4 bytes */ c->ad_bytes = def_ad_bytes ^ 6; break; + case 0x26: /* ES override */ case 0x2e: /* CS override */ - c->override_base = &ctxt->cs_base; - break; + case 0x36: /* SS override */ case 0x3e: /* DS override */ - c->override_base = &ctxt->ds_base; - break; - case 0x26: /* ES override */ - c->override_base = &ctxt->es_base; + set_seg_override(c, (c->b >> 3) & 3); break; case 0x64: /* FS override */ - c->override_base = &ctxt->fs_base; - break; case 0x65: /* GS override */ - c->override_base = &ctxt->gs_base; - break; - case 0x36: /* SS override */ - c->override_base = &ctxt->ss_base; + set_seg_override(c, c->b & 7); break; case 0x40 ... 0x4f: /* REX */ if (mode != X86EMUL_MODE_PROT64) @@ -964,15 +959,11 @@ done_prefixes: if (rc) goto done; - if (!c->override_base) - c->override_base = &ctxt->ds_base; - if (mode == X86EMUL_MODE_PROT64 && - c->override_base != &ctxt->fs_base && - c->override_base != &ctxt->gs_base) - c->override_base = NULL; + if (!c->has_seg_override) + set_seg_override(c, VCPU_SREG_DS); - if (c->override_base) - c->modrm_ea += *c->override_base; + if (!(!c->twobyte && c->b == 0x8d)) + c->modrm_ea += seg_override_base(ctxt, c); if (c->ad_bytes != 8) c->modrm_ea = (u32)c->modrm_ea; @@ -1049,6 +1040,7 @@ done_prefixes: break; case DstMem: if ((c->d & ModRM) && c->modrm_mod == 3) { + c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.type = OP_REG; c->dst.val = c->dst.orig_val = c->modrm_val; c->dst.ptr = c->modrm_ptr; @@ -1058,6 +1050,9 @@ done_prefixes: break; } + if (c->rip_relative) + c->modrm_ea += c->eip; + done: return (rc == X86EMUL_UNHANDLEABLE) ? -1 : 0; } @@ -1070,7 +1065,7 @@ static inline void emulate_push(struct x86_emulate_ctxt *ctxt) c->dst.bytes = c->op_bytes; c->dst.val = c->src.val; register_address_increment(c, &c->regs[VCPU_REGS_RSP], -c->op_bytes); - c->dst.ptr = (void *) register_address(c, ctxt->ss_base, + c->dst.ptr = (void *) register_address(c, ss_base(ctxt), c->regs[VCPU_REGS_RSP]); } @@ -1080,7 +1075,7 @@ static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt, struct decode_cache *c = &ctxt->decode; int rc; - rc = ops->read_std(register_address(c, ctxt->ss_base, + rc = ops->read_std(register_address(c, ss_base(ctxt), c->regs[VCPU_REGS_RSP]), &c->dst.val, c->dst.bytes, ctxt->vcpu); if (rc != 0) @@ -1402,11 +1397,11 @@ special_insn: register_address_increment(c, &c->regs[VCPU_REGS_RSP], -c->op_bytes); c->dst.ptr = (void *) register_address( - c, ctxt->ss_base, c->regs[VCPU_REGS_RSP]); + c, ss_base(ctxt), c->regs[VCPU_REGS_RSP]); break; case 0x58 ... 0x5f: /* pop reg */ pop_instruction: - if ((rc = ops->read_std(register_address(c, ctxt->ss_base, + if ((rc = ops->read_std(register_address(c, ss_base(ctxt), c->regs[VCPU_REGS_RSP]), c->dst.ptr, c->op_bytes, ctxt->vcpu)) != 0) goto done; @@ -1420,9 +1415,8 @@ special_insn: goto cannot_emulate; c->dst.val = (s32) c->src.val; break; + case 0x68: /* push imm */ case 0x6a: /* push imm8 */ - c->src.val = 0L; - c->src.val = insn_fetch(s8, 1, c->eip); emulate_push(ctxt); break; case 0x6c: /* insb */ @@ -1433,7 +1427,7 @@ special_insn: c->rep_prefix ? address_mask(c, c->regs[VCPU_REGS_RCX]) : 1, (ctxt->eflags & EFLG_DF), - register_address(c, ctxt->es_base, + register_address(c, es_base(ctxt), c->regs[VCPU_REGS_RDI]), c->rep_prefix, c->regs[VCPU_REGS_RDX]) == 0) { @@ -1449,9 +1443,8 @@ special_insn: c->rep_prefix ? address_mask(c, c->regs[VCPU_REGS_RCX]) : 1, (ctxt->eflags & EFLG_DF), - register_address(c, c->override_base ? - *c->override_base : - ctxt->ds_base, + register_address(c, + seg_override_base(ctxt, c), c->regs[VCPU_REGS_RSI]), c->rep_prefix, c->regs[VCPU_REGS_RDX]) == 0) { @@ -1490,6 +1483,7 @@ special_insn: emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags); break; case 0x86 ... 0x87: /* xchg */ + xchg: /* Write back the register source. */ switch (c->dst.bytes) { case 1: @@ -1514,14 +1508,60 @@ special_insn: break; case 0x88 ... 0x8b: /* mov */ goto mov; + case 0x8c: { /* mov r/m, sreg */ + struct kvm_segment segreg; + + if (c->modrm_reg <= 5) + kvm_get_segment(ctxt->vcpu, &segreg, c->modrm_reg); + else { + printk(KERN_INFO "0x8c: Invalid segreg in modrm byte 0x%02x\n", + c->modrm); + goto cannot_emulate; + } + c->dst.val = segreg.selector; + break; + } case 0x8d: /* lea r16/r32, m */ c->dst.val = c->modrm_ea; break; + case 0x8e: { /* mov seg, r/m16 */ + uint16_t sel; + int type_bits; + int err; + + sel = c->src.val; + if (c->modrm_reg <= 5) { + type_bits = (c->modrm_reg == 1) ? 9 : 1; + err = kvm_load_segment_descriptor(ctxt->vcpu, sel, + type_bits, c->modrm_reg); + } else { + printk(KERN_INFO "Invalid segreg in modrm byte 0x%02x\n", + c->modrm); + goto cannot_emulate; + } + + if (err < 0) + goto cannot_emulate; + + c->dst.type = OP_NONE; /* Disable writeback. */ + break; + } case 0x8f: /* pop (sole member of Grp1a) */ rc = emulate_grp1a(ctxt, ops); if (rc != 0) goto done; break; + case 0x90: /* nop / xchg r8,rax */ + if (!(c->rex_prefix & 1)) { /* nop */ + c->dst.type = OP_NONE; + break; + } + case 0x91 ... 0x97: /* xchg reg,rax */ + c->src.type = c->dst.type = OP_REG; + c->src.bytes = c->dst.bytes = c->op_bytes; + c->src.ptr = (unsigned long *) &c->regs[VCPU_REGS_RAX]; + c->src.val = *(c->src.ptr); + goto xchg; case 0x9c: /* pushf */ c->src.val = (unsigned long) ctxt->eflags; emulate_push(ctxt); @@ -1540,11 +1580,10 @@ special_insn: c->dst.type = OP_MEM; c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.ptr = (unsigned long *)register_address(c, - ctxt->es_base, + es_base(ctxt), c->regs[VCPU_REGS_RDI]); if ((rc = ops->read_emulated(register_address(c, - c->override_base ? *c->override_base : - ctxt->ds_base, + seg_override_base(ctxt, c), c->regs[VCPU_REGS_RSI]), &c->dst.val, c->dst.bytes, ctxt->vcpu)) != 0) @@ -1560,8 +1599,7 @@ special_insn: c->src.type = OP_NONE; /* Disable writeback. */ c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->src.ptr = (unsigned long *)register_address(c, - c->override_base ? *c->override_base : - ctxt->ds_base, + seg_override_base(ctxt, c), c->regs[VCPU_REGS_RSI]); if ((rc = ops->read_emulated((unsigned long)c->src.ptr, &c->src.val, @@ -1572,7 +1610,7 @@ special_insn: c->dst.type = OP_NONE; /* Disable writeback. */ c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.ptr = (unsigned long *)register_address(c, - ctxt->es_base, + es_base(ctxt), c->regs[VCPU_REGS_RDI]); if ((rc = ops->read_emulated((unsigned long)c->dst.ptr, &c->dst.val, @@ -1596,7 +1634,7 @@ special_insn: c->dst.type = OP_MEM; c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.ptr = (unsigned long *)register_address(c, - ctxt->es_base, + es_base(ctxt), c->regs[VCPU_REGS_RDI]); c->dst.val = c->regs[VCPU_REGS_RAX]; register_address_increment(c, &c->regs[VCPU_REGS_RDI], @@ -1608,8 +1646,7 @@ special_insn: c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes; c->dst.ptr = (unsigned long *)&c->regs[VCPU_REGS_RAX]; if ((rc = ops->read_emulated(register_address(c, - c->override_base ? *c->override_base : - ctxt->ds_base, + seg_override_base(ctxt, c), c->regs[VCPU_REGS_RSI]), &c->dst.val, c->dst.bytes, @@ -1622,6 +1659,8 @@ special_insn: case 0xae ... 0xaf: /* scas */ DPRINTF("Urk! I don't handle SCAS.\n"); goto cannot_emulate; + case 0xb8: /* mov r, imm */ + goto mov; case 0xc0 ... 0xc1: emulate_grp2(ctxt); break; @@ -1660,13 +1699,39 @@ special_insn: break; } case 0xe9: /* jmp rel */ - case 0xeb: /* jmp rel short */ + goto jmp; + case 0xea: /* jmp far */ { + uint32_t eip; + uint16_t sel; + + switch (c->op_bytes) { + case 2: + eip = insn_fetch(u16, 2, c->eip); + break; + case 4: + eip = insn_fetch(u32, 4, c->eip); + break; + default: + DPRINTF("jmp far: Invalid op_bytes\n"); + goto cannot_emulate; + } + sel = insn_fetch(u16, 2, c->eip); + if (kvm_load_segment_descriptor(ctxt->vcpu, sel, 9, VCPU_SREG_CS) < 0) { + DPRINTF("jmp far: Failed to load CS descriptor\n"); + goto cannot_emulate; + } + + c->eip = eip; + break; + } + case 0xeb: + jmp: /* jmp rel short */ jmp_rel(c, c->src.val); c->dst.type = OP_NONE; /* Disable writeback. */ break; case 0xf4: /* hlt */ ctxt->vcpu->arch.halt_request = 1; - goto done; + break; case 0xf5: /* cmc */ /* complement carry flag from eflags reg */ ctxt->eflags ^= EFLG_CF; @@ -1882,6 +1947,8 @@ twobyte_insn: c->src.val &= (c->dst.bytes << 3) - 1; emulate_2op_SrcV_nobyte("bts", c->src, c->dst, ctxt->eflags); break; + case 0xae: /* clflush */ + break; case 0xb0 ... 0xb1: /* cmpxchg */ /* * Save real source value, then compare EAX against diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 50dad44fb54..0313a5eec41 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -991,7 +991,6 @@ __init void lguest_init(void) #ifdef CONFIG_X86_LOCAL_APIC /* apic read/write intercepts */ pv_apic_ops.apic_write = lguest_apic_write; - pv_apic_ops.apic_write_atomic = lguest_apic_write; pv_apic_ops.apic_read = lguest_apic_read; #endif diff --git a/arch/x86/mach-default/setup.c b/arch/x86/mach-default/setup.c index 48278fa7d3d..3d317836be9 100644 --- a/arch/x86/mach-default/setup.c +++ b/arch/x86/mach-default/setup.c @@ -10,14 +10,6 @@ #include <asm/e820.h> #include <asm/setup.h> -/* - * Any quirks to be performed to initialize timers/irqs/etc? - */ -int (*arch_time_init_quirk)(void); -int (*arch_pre_intr_init_quirk)(void); -int (*arch_intr_init_quirk)(void); -int (*arch_trap_init_quirk)(void); - #ifdef CONFIG_HOTPLUG_CPU #define DEFAULT_SEND_IPI (1) #else @@ -37,8 +29,8 @@ int no_broadcast=DEFAULT_SEND_IPI; **/ void __init pre_intr_init_hook(void) { - if (arch_pre_intr_init_quirk) { - if (arch_pre_intr_init_quirk()) + if (x86_quirks->arch_pre_intr_init) { + if (x86_quirks->arch_pre_intr_init()) return; } init_ISA_irqs(); @@ -64,8 +56,8 @@ static struct irqaction irq2 = { **/ void __init intr_init_hook(void) { - if (arch_intr_init_quirk) { - if (arch_intr_init_quirk()) + if (x86_quirks->arch_intr_init) { + if (x86_quirks->arch_intr_init()) return; } #ifdef CONFIG_X86_LOCAL_APIC @@ -97,8 +89,8 @@ void __init pre_setup_arch_hook(void) **/ void __init trap_init_hook(void) { - if (arch_trap_init_quirk) { - if (arch_trap_init_quirk()) + if (x86_quirks->arch_trap_init) { + if (x86_quirks->arch_trap_init()) return; } } @@ -111,6 +103,16 @@ static struct irqaction irq0 = { }; /** + * pre_time_init_hook - do any specific initialisations before. + * + **/ +void __init pre_time_init_hook(void) +{ + if (x86_quirks->arch_pre_time_init) + x86_quirks->arch_pre_time_init(); +} + +/** * time_init_hook - do any specific initialisations for the system timer. * * Description: @@ -119,13 +121,13 @@ static struct irqaction irq0 = { **/ void __init time_init_hook(void) { - if (arch_time_init_quirk) { + if (x86_quirks->arch_time_init) { /* * A nonzero return code does not mean failure, it means * that the architecture quirk does not want any * generic (timer) setup to be performed after this: */ - if (arch_time_init_quirk()) + if (x86_quirks->arch_time_init()) return; } diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile index 9873716e9f7..1fbb844c3d7 100644 --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_K8_NUMA) += k8topology_64.o endif obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o +obj-$(CONFIG_MEMTEST) += memtest.o diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 9689a5138e6..d37f29376b0 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -844,6 +844,9 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, reserve_early(table_start << PAGE_SHIFT, table_end << PAGE_SHIFT, "PGTABLE"); + if (!after_init_bootmem) + early_memtest(start, end); + return end >> PAGE_SHIFT; } @@ -868,8 +871,6 @@ void __init paging_init(void) */ sparse_init(); zone_sizes_init(); - - paravirt_post_allocator_init(); } /* diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 306049edd55..ec37121f670 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -517,118 +517,6 @@ static void __init init_gbpages(void) direct_gbpages = 0; } -#ifdef CONFIG_MEMTEST - -static void __init memtest(unsigned long start_phys, unsigned long size, - unsigned pattern) -{ - unsigned long i; - unsigned long *start; - unsigned long start_bad; - unsigned long last_bad; - unsigned long val; - unsigned long start_phys_aligned; - unsigned long count; - unsigned long incr; - - switch (pattern) { - case 0: - val = 0UL; - break; - case 1: - val = -1UL; - break; - case 2: - val = 0x5555555555555555UL; - break; - case 3: - val = 0xaaaaaaaaaaaaaaaaUL; - break; - default: - return; - } - - incr = sizeof(unsigned long); - start_phys_aligned = ALIGN(start_phys, incr); - count = (size - (start_phys_aligned - start_phys))/incr; - start = __va(start_phys_aligned); - start_bad = 0; - last_bad = 0; - - for (i = 0; i < count; i++) - start[i] = val; - for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { - if (*start != val) { - if (start_phys_aligned == last_bad + incr) { - last_bad += incr; - } else { - if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved", - val, start_bad, last_bad + incr); - reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); - } - start_bad = last_bad = start_phys_aligned; - } - } - } - if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %016lx - %016lx reserved", - val, start_bad, last_bad + incr); - reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); - } - -} - -/* default is disabled */ -static int memtest_pattern __initdata; - -static int __init parse_memtest(char *arg) -{ - if (arg) - memtest_pattern = simple_strtoul(arg, NULL, 0); - return 0; -} - -early_param("memtest", parse_memtest); - -static void __init early_memtest(unsigned long start, unsigned long end) -{ - u64 t_start, t_size; - unsigned pattern; - - if (!memtest_pattern) - return; - - printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); - for (pattern = 0; pattern < memtest_pattern; pattern++) { - t_start = start; - t_size = 0; - while (t_start < end) { - t_start = find_e820_area_size(t_start, &t_size, 1); - - /* done ? */ - if (t_start >= end) - break; - if (t_start + t_size > end) - t_size = end - t_start; - - printk(KERN_CONT "\n %016llx - %016llx pattern %d", - (unsigned long long)t_start, - (unsigned long long)t_start + t_size, pattern); - - memtest(t_start, t_size, pattern); - - t_start += t_size; - } - } - printk(KERN_CONT "\n"); -} -#else -static void __init early_memtest(unsigned long start, unsigned long end) -{ -} -#endif - static unsigned long __init kernel_physical_mapping_init(unsigned long start, unsigned long end, unsigned long page_size_mask) diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c new file mode 100644 index 00000000000..672e17f8262 --- /dev/null +++ b/arch/x86/mm/memtest.c @@ -0,0 +1,123 @@ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/init.h> +#include <linux/pfn.h> + +#include <asm/e820.h> + +static void __init memtest(unsigned long start_phys, unsigned long size, + unsigned pattern) +{ + unsigned long i; + unsigned long *start; + unsigned long start_bad; + unsigned long last_bad; + unsigned long val; + unsigned long start_phys_aligned; + unsigned long count; + unsigned long incr; + + switch (pattern) { + case 0: + val = 0UL; + break; + case 1: + val = -1UL; + break; + case 2: +#ifdef CONFIG_X86_64 + val = 0x5555555555555555UL; +#else + val = 0x55555555UL; +#endif + break; + case 3: +#ifdef CONFIG_X86_64 + val = 0xaaaaaaaaaaaaaaaaUL; +#else + val = 0xaaaaaaaaUL; +#endif + break; + default: + return; + } + + incr = sizeof(unsigned long); + start_phys_aligned = ALIGN(start_phys, incr); + count = (size - (start_phys_aligned - start_phys))/incr; + start = __va(start_phys_aligned); + start_bad = 0; + last_bad = 0; + + for (i = 0; i < count; i++) + start[i] = val; + for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { + if (*start != val) { + if (start_phys_aligned == last_bad + incr) { + last_bad += incr; + } else { + if (start_bad) { + printk(KERN_CONT "\n %010lx bad mem addr %010lx - %010lx reserved", + val, start_bad, last_bad + incr); + reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); + } + start_bad = last_bad = start_phys_aligned; + } + } + } + if (start_bad) { + printk(KERN_CONT "\n %016lx bad mem addr %010lx - %010lx reserved", + val, start_bad, last_bad + incr); + reserve_early(start_bad, last_bad - start_bad, "BAD RAM"); + } + +} + +/* default is disabled */ +static int memtest_pattern __initdata; + +static int __init parse_memtest(char *arg) +{ + if (arg) + memtest_pattern = simple_strtoul(arg, NULL, 0); + return 0; +} + +early_param("memtest", parse_memtest); + +void __init early_memtest(unsigned long start, unsigned long end) +{ + u64 t_start, t_size; + unsigned pattern; + + if (!memtest_pattern) + return; + + printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); + for (pattern = 0; pattern < memtest_pattern; pattern++) { + t_start = start; + t_size = 0; + while (t_start < end) { + t_start = find_e820_area_size(t_start, &t_size, 1); + + /* done ? */ + if (t_start >= end) + break; + if (t_start + t_size > end) + t_size = end - t_start; + + printk(KERN_CONT "\n %010llx - %010llx pattern %d", + (unsigned long long)t_start, + (unsigned long long)t_start + t_size, pattern); + + memtest(t_start, t_size, pattern); + + t_start += t_size; + } + } + printk(KERN_CONT "\n"); +} diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index d4585077977..2fe30916d4b 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -12,6 +12,8 @@ #include <linux/gfp.h> #include <linux/fs.h> #include <linux/bootmem.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> #include <asm/msr.h> #include <asm/tlbflush.h> @@ -373,8 +375,8 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, return vma_prot; } -#ifdef CONFIG_NONPROMISC_DEVMEM -/* This check is done in drivers/char/mem.c in case of NONPROMISC_DEVMEM*/ +#ifdef CONFIG_STRICT_DEVMEM +/* This check is done in drivers/char/mem.c in case of STRICT_DEVMEM*/ static inline int range_is_allowed(unsigned long pfn, unsigned long size) { return 1; @@ -398,7 +400,7 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size) } return 1; } -#endif /* CONFIG_NONPROMISC_DEVMEM */ +#endif /* CONFIG_STRICT_DEVMEM */ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, unsigned long size, pgprot_t *vma_prot) @@ -489,3 +491,89 @@ void unmap_devmem(unsigned long pfn, unsigned long size, pgprot_t vma_prot) free_memtype(addr, addr + size); } + +#if defined(CONFIG_DEBUG_FS) + +/* get Nth element of the linked list */ +static struct memtype *memtype_get_idx(loff_t pos) +{ + struct memtype *list_node, *print_entry; + int i = 1; + + print_entry = kmalloc(sizeof(struct memtype), GFP_KERNEL); + if (!print_entry) + return NULL; + + spin_lock(&memtype_lock); + list_for_each_entry(list_node, &memtype_list, nd) { + if (pos == i) { + *print_entry = *list_node; + spin_unlock(&memtype_lock); + return print_entry; + } + ++i; + } + spin_unlock(&memtype_lock); + kfree(print_entry); + return NULL; +} + +static void *memtype_seq_start(struct seq_file *seq, loff_t *pos) +{ + if (*pos == 0) { + ++*pos; + seq_printf(seq, "PAT memtype list:\n"); + } + + return memtype_get_idx(*pos); +} + +static void *memtype_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + return memtype_get_idx(*pos); +} + +static void memtype_seq_stop(struct seq_file *seq, void *v) +{ +} + +static int memtype_seq_show(struct seq_file *seq, void *v) +{ + struct memtype *print_entry = (struct memtype *)v; + + seq_printf(seq, "%s @ 0x%Lx-0x%Lx\n", cattr_name(print_entry->type), + print_entry->start, print_entry->end); + kfree(print_entry); + return 0; +} + +static struct seq_operations memtype_seq_ops = { + .start = memtype_seq_start, + .next = memtype_seq_next, + .stop = memtype_seq_stop, + .show = memtype_seq_show, +}; + +static int memtype_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &memtype_seq_ops); +} + +static const struct file_operations memtype_fops = { + .open = memtype_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int __init pat_memtype_list_init(void) +{ + debugfs_create_file("pat_memtype_list", S_IRUSR, arch_debugfs_dir, + NULL, &memtype_fops); + return 0; +} + +late_initcall(pat_memtype_list_init); + +#endif /* CONFIG_DEBUG_FS */ diff --git a/arch/x86/pci/Makefile b/arch/x86/pci/Makefile index e515e8db842..d49202e740e 100644 --- a/arch/x86/pci/Makefile +++ b/arch/x86/pci/Makefile @@ -5,13 +5,13 @@ obj-$(CONFIG_PCI_MMCONFIG) += mmconfig_$(BITS).o direct.o mmconfig-shared.o obj-$(CONFIG_PCI_DIRECT) += direct.o obj-$(CONFIG_PCI_OLPC) += olpc.o -pci-y := fixup.o -pci-$(CONFIG_ACPI) += acpi.o -pci-y += legacy.o irq.o +obj-y += fixup.o +obj-$(CONFIG_ACPI) += acpi.o +obj-y += legacy.o irq.o -pci-$(CONFIG_X86_VISWS) += visws.o +obj-$(CONFIG_X86_VISWS) += visws.o -pci-$(CONFIG_X86_NUMAQ) += numa.o +obj-$(CONFIG_X86_NUMAQ) += numaq_32.o -obj-y += $(pci-y) common.o early.o +obj-y += common.o early.o obj-y += amd_bus.o diff --git a/arch/x86/pci/legacy.c b/arch/x86/pci/legacy.c index 132876cc6fc..ec9ce35e44d 100644 --- a/arch/x86/pci/legacy.c +++ b/arch/x86/pci/legacy.c @@ -57,14 +57,17 @@ static int __init pci_legacy_init(void) int __init pci_subsys_init(void) { +#ifdef CONFIG_X86_NUMAQ + pci_numaq_init(); +#endif #ifdef CONFIG_ACPI pci_acpi_init(); #endif +#ifdef CONFIG_X86_VISWS + pci_visws_init(); +#endif pci_legacy_init(); pcibios_irq_init(); -#ifdef CONFIG_X86_NUMAQ - pci_numa_init(); -#endif pcibios_init(); return 0; diff --git a/arch/x86/pci/numa.c b/arch/x86/pci/numaq_32.c index 8b5ca196673..f4b16dc11da 100644 --- a/arch/x86/pci/numa.c +++ b/arch/x86/pci/numaq_32.c @@ -1,5 +1,5 @@ /* - * numa.c - Low-level PCI access for NUMA-Q machines + * numaq_32.c - Low-level PCI access for NUMA-Q machines */ #include <linux/pci.h> @@ -151,7 +151,7 @@ static void __devinit pci_fixup_i450nx(struct pci_dev *d) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx); -int __init pci_numa_init(void) +int __init pci_numaq_init(void) { int quad; diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h index 3e25deb821a..15b9cf6be72 100644 --- a/arch/x86/pci/pci.h +++ b/arch/x86/pci/pci.h @@ -108,7 +108,8 @@ extern void __init dmi_check_skip_isa_align(void); /* some common used subsys_initcalls */ extern int __init pci_acpi_init(void); extern int __init pcibios_irq_init(void); -extern int __init pci_numa_init(void); +extern int __init pci_visws_init(void); +extern int __init pci_numaq_init(void); extern int __init pcibios_init(void); /* pci-mmconfig.c */ diff --git a/arch/x86/pci/visws.c b/arch/x86/pci/visws.c index 1a7bed492bb..42f4cb19fac 100644 --- a/arch/x86/pci/visws.c +++ b/arch/x86/pci/visws.c @@ -86,8 +86,14 @@ void __init pcibios_update_irq(struct pci_dev *dev, int irq) pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); } -static int __init pci_visws_init(void) +int __init pci_visws_init(void) { + if (!is_visws_box()) + return -1; + + pcibios_enable_irq = &pci_visws_enable_irq; + pcibios_disable_irq = &pci_visws_disable_irq; + /* The VISWS supports configuration access type 1 only */ pci_probe = (pci_probe | PCI_PROBE_CONF1) & ~(PCI_PROBE_BIOS | PCI_PROBE_CONF2); @@ -105,18 +111,3 @@ static int __init pci_visws_init(void) pcibios_resource_survey(); return 0; } - -static __init int pci_subsys_init(void) -{ - if (!is_visws_box()) - return -1; - - pcibios_enable_irq = &pci_visws_enable_irq; - pcibios_disable_irq = &pci_visws_disable_irq; - - pci_visws_init(); - pcibios_init(); - - return 0; -} -subsys_initcall(pci_subsys_init); diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index b7ad9f89d21..4d6ef0a336d 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -62,7 +62,7 @@ $(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE # Build multiple 32-bit vDSO images to choose from at boot time. # obj-$(VDSO32-y) += vdso32-syms.lds -vdso32.so-$(CONFIG_X86_32) += int80 +vdso32.so-$(VDSO32-y) += int80 vdso32.so-$(CONFIG_COMPAT) += syscall vdso32.so-$(VDSO32-y) += sysenter diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c index 0bce5429a51..513f330c583 100644 --- a/arch/x86/vdso/vdso32-setup.c +++ b/arch/x86/vdso/vdso32-setup.c @@ -193,17 +193,12 @@ static __init void relocate_vdso(Elf32_Ehdr *ehdr) } } -/* - * These symbols are defined by vdso32.S to mark the bounds - * of the ELF DSO images included therein. - */ -extern const char vdso32_default_start, vdso32_default_end; -extern const char vdso32_sysenter_start, vdso32_sysenter_end; static struct page *vdso32_pages[1]; #ifdef CONFIG_X86_64 #define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SYSENTER32)) +#define vdso32_syscall() (boot_cpu_has(X86_FEATURE_SYSCALL32)) /* May not be __init: called during resume */ void syscall32_cpu_init(void) @@ -226,6 +221,7 @@ static inline void map_compat_vdso(int map) #else /* CONFIG_X86_32 */ #define vdso32_sysenter() (boot_cpu_has(X86_FEATURE_SEP)) +#define vdso32_syscall() (0) void enable_sep_cpu(void) { @@ -296,12 +292,15 @@ int __init sysenter_setup(void) gate_vma_init(); #endif - if (!vdso32_sysenter()) { - vsyscall = &vdso32_default_start; - vsyscall_len = &vdso32_default_end - &vdso32_default_start; - } else { + if (vdso32_syscall()) { + vsyscall = &vdso32_syscall_start; + vsyscall_len = &vdso32_syscall_end - &vdso32_syscall_start; + } else if (vdso32_sysenter()){ vsyscall = &vdso32_sysenter_start; vsyscall_len = &vdso32_sysenter_end - &vdso32_sysenter_start; + } else { + vsyscall = &vdso32_int80_start; + vsyscall_len = &vdso32_int80_end - &vdso32_int80_start; } memcpy(syscall_page, vsyscall, vsyscall_len); diff --git a/arch/x86/vdso/vdso32.S b/arch/x86/vdso/vdso32.S index 1e36f72cab8..2ce5f82c333 100644 --- a/arch/x86/vdso/vdso32.S +++ b/arch/x86/vdso/vdso32.S @@ -2,14 +2,17 @@ __INITDATA - .globl vdso32_default_start, vdso32_default_end -vdso32_default_start: -#ifdef CONFIG_X86_32 + .globl vdso32_int80_start, vdso32_int80_end +vdso32_int80_start: .incbin "arch/x86/vdso/vdso32-int80.so" -#else +vdso32_int80_end: + + .globl vdso32_syscall_start, vdso32_syscall_end +vdso32_syscall_start: +#ifdef CONFIG_COMPAT .incbin "arch/x86/vdso/vdso32-syscall.so" #endif -vdso32_default_end: +vdso32_syscall_end: .globl vdso32_sysenter_start, vdso32_sysenter_end vdso32_sysenter_start: diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c index 19a6cfaf5db..257ba4a10ab 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/vdso/vma.c @@ -21,7 +21,8 @@ unsigned int __read_mostly vdso_enabled = 1; extern char vdso_start[], vdso_end[]; extern unsigned short vdso_sync_cpuid; -struct page **vdso_pages; +static struct page **vdso_pages; +static unsigned vdso_size; static inline void *var_ref(void *p, char *name) { @@ -38,6 +39,7 @@ static int __init init_vdso_vars(void) int i; char *vbase; + vdso_size = npages << PAGE_SHIFT; vdso_pages = kmalloc(sizeof(struct page *) * npages, GFP_KERNEL); if (!vdso_pages) goto oom; @@ -101,20 +103,19 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack) struct mm_struct *mm = current->mm; unsigned long addr; int ret; - unsigned len = round_up(vdso_end - vdso_start, PAGE_SIZE); if (!vdso_enabled) return 0; down_write(&mm->mmap_sem); - addr = vdso_addr(mm->start_stack, len); - addr = get_unmapped_area(NULL, addr, len, 0, 0); + addr = vdso_addr(mm->start_stack, vdso_size); + addr = get_unmapped_area(NULL, addr, vdso_size, 0, 0); if (IS_ERR_VALUE(addr)) { ret = addr; goto up_fail; } - ret = install_special_mapping(mm, addr, len, + ret = install_special_mapping(mm, addr, vdso_size, VM_READ|VM_EXEC| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| VM_ALWAYSDUMP, diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index c2cc9958087..3815e425f47 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -6,8 +6,8 @@ config XEN bool "Xen guest support" select PARAVIRT select PARAVIRT_CLOCK - depends on X86_32 - depends on X86_CMPXCHG && X86_TSC && X86_PAE && !(X86_VISWS || X86_VOYAGER) + depends on X86_64 || (X86_32 && X86_PAE && !(X86_VISWS || X86_VOYAGER)) + depends on X86_CMPXCHG && X86_TSC help This is the Linux Xen port. Enabling this will allow the kernel to boot in a paravirtualized environment under the @@ -15,10 +15,16 @@ config XEN config XEN_MAX_DOMAIN_MEMORY int "Maximum allowed size of a domain in gigabytes" - default 8 + default 8 if X86_32 + default 32 if X86_64 depends on XEN help The pseudo-physical to machine address array is sized according to the maximum possible memory size of a Xen domain. This array uses 1 page per gigabyte, so there's no - need to be too stingy here.
\ No newline at end of file + need to be too stingy here. + +config XEN_SAVE_RESTORE + bool + depends on PM + default y
\ No newline at end of file diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile index 2ba2d164913..59c1e539aed 100644 --- a/arch/x86/xen/Makefile +++ b/arch/x86/xen/Makefile @@ -1,4 +1,4 @@ obj-y := enlighten.o setup.o multicalls.o mmu.o \ - time.o xen-asm.o grant-table.o suspend.o + time.o xen-asm_$(BITS).o grant-table.o suspend.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index bb508456ef5..194bbd6e324 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -33,6 +33,7 @@ #include <xen/interface/sched.h> #include <xen/features.h> #include <xen/page.h> +#include <xen/hvc-console.h> #include <asm/paravirt.h> #include <asm/page.h> @@ -40,12 +41,12 @@ #include <asm/xen/hypervisor.h> #include <asm/fixmap.h> #include <asm/processor.h> +#include <asm/msr-index.h> #include <asm/setup.h> #include <asm/desc.h> #include <asm/pgtable.h> #include <asm/tlbflush.h> #include <asm/reboot.h> -#include <asm/pgalloc.h> #include "xen-ops.h" #include "mmu.h" @@ -57,6 +58,18 @@ DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu); DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info); /* + * Identity map, in addition to plain kernel map. This needs to be + * large enough to allocate page table pages to allocate the rest. + * Each page can map 2MB. + */ +static pte_t level1_ident_pgt[PTRS_PER_PTE * 4] __page_aligned_bss; + +#ifdef CONFIG_X86_64 +/* l3 pud for userspace vsyscall mapping */ +static pud_t level3_user_vsyscall[PTRS_PER_PUD] __page_aligned_bss; +#endif /* CONFIG_X86_64 */ + +/* * Note about cr3 (pagetable base) values: * * xen_cr3 contains the current logical cr3 value; it contains the @@ -167,10 +180,14 @@ void xen_vcpu_restore(void) static void __init xen_banner(void) { + unsigned version = HYPERVISOR_xen_version(XENVER_version, NULL); + struct xen_extraversion extra; + HYPERVISOR_xen_version(XENVER_extraversion, &extra); + printk(KERN_INFO "Booting paravirtualized kernel on %s\n", pv_info.name); - printk(KERN_INFO "Hypervisor signature: %s%s\n", - xen_start_info->magic, + printk(KERN_INFO "Xen version: %d.%d%s%s\n", + version >> 16, version & 0xffff, extra.extraversion, xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : ""); } @@ -363,14 +380,6 @@ static void load_TLS_descriptor(struct thread_struct *t, static void xen_load_tls(struct thread_struct *t, unsigned int cpu) { - xen_mc_batch(); - - load_TLS_descriptor(t, cpu, 0); - load_TLS_descriptor(t, cpu, 1); - load_TLS_descriptor(t, cpu, 2); - - xen_mc_issue(PARAVIRT_LAZY_CPU); - /* * XXX sleazy hack: If we're being called in a lazy-cpu zone, * it means we're in a context switch, and %gs has just been @@ -379,10 +388,39 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu) * Either way, it has been saved, and the new value will get * loaded properly. This will go away as soon as Xen has been * modified to not save/restore %gs for normal hypercalls. + * + * On x86_64, this hack is not used for %gs, because gs points + * to KERNEL_GS_BASE (and uses it for PDA references), so we + * must not zero %gs on x86_64 + * + * For x86_64, we need to zero %fs, otherwise we may get an + * exception between the new %fs descriptor being loaded and + * %fs being effectively cleared at __switch_to(). */ - if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) + if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) { +#ifdef CONFIG_X86_32 loadsegment(gs, 0); +#else + loadsegment(fs, 0); +#endif + } + + xen_mc_batch(); + + load_TLS_descriptor(t, cpu, 0); + load_TLS_descriptor(t, cpu, 1); + load_TLS_descriptor(t, cpu, 2); + + xen_mc_issue(PARAVIRT_LAZY_CPU); +} + +#ifdef CONFIG_X86_64 +static void xen_load_gs_index(unsigned int idx) +{ + if (HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, idx)) + BUG(); } +#endif static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum, const void *ptr) @@ -400,23 +438,18 @@ static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum, preempt_enable(); } -static int cvt_gate_to_trap(int vector, u32 low, u32 high, +static int cvt_gate_to_trap(int vector, const gate_desc *val, struct trap_info *info) { - u8 type, dpl; - - type = (high >> 8) & 0x1f; - dpl = (high >> 13) & 3; - - if (type != 0xf && type != 0xe) + if (val->type != 0xf && val->type != 0xe) return 0; info->vector = vector; - info->address = (high & 0xffff0000) | (low & 0x0000ffff); - info->cs = low >> 16; - info->flags = dpl; + info->address = gate_offset(*val); + info->cs = gate_segment(*val); + info->flags = val->dpl; /* interrupt gates clear IF */ - if (type == 0xe) + if (val->type == 0xe) info->flags |= 4; return 1; @@ -443,11 +476,10 @@ static void xen_write_idt_entry(gate_desc *dt, int entrynum, const gate_desc *g) if (p >= start && (p + 8) <= end) { struct trap_info info[2]; - u32 *desc = (u32 *)g; info[1].address = 0; - if (cvt_gate_to_trap(entrynum, desc[0], desc[1], &info[0])) + if (cvt_gate_to_trap(entrynum, g, &info[0])) if (HYPERVISOR_set_trap_table(info)) BUG(); } @@ -460,13 +492,13 @@ static void xen_convert_trap_info(const struct desc_ptr *desc, { unsigned in, out, count; - count = (desc->size+1) / 8; + count = (desc->size+1) / sizeof(gate_desc); BUG_ON(count > 256); for (in = out = 0; in < count; in++) { - const u32 *entry = (u32 *)(desc->address + in * 8); + gate_desc *entry = (gate_desc*)(desc->address) + in; - if (cvt_gate_to_trap(in, entry[0], entry[1], &traps[out])) + if (cvt_gate_to_trap(in, entry, &traps[out])) out++; } traps[out].address = 0; @@ -695,33 +727,89 @@ static void set_current_cr3(void *v) x86_write_percpu(xen_current_cr3, (unsigned long)v); } -static void xen_write_cr3(unsigned long cr3) +static void __xen_write_cr3(bool kernel, unsigned long cr3) { struct mmuext_op *op; struct multicall_space mcs; - unsigned long mfn = pfn_to_mfn(PFN_DOWN(cr3)); + unsigned long mfn; - BUG_ON(preemptible()); + if (cr3) + mfn = pfn_to_mfn(PFN_DOWN(cr3)); + else + mfn = 0; - mcs = xen_mc_entry(sizeof(*op)); /* disables interrupts */ + WARN_ON(mfn == 0 && kernel); - /* Update while interrupts are disabled, so its atomic with - respect to ipis */ - x86_write_percpu(xen_cr3, cr3); + mcs = __xen_mc_entry(sizeof(*op)); op = mcs.args; - op->cmd = MMUEXT_NEW_BASEPTR; + op->cmd = kernel ? MMUEXT_NEW_BASEPTR : MMUEXT_NEW_USER_BASEPTR; op->arg1.mfn = mfn; MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF); - /* Update xen_update_cr3 once the batch has actually - been submitted. */ - xen_mc_callback(set_current_cr3, (void *)cr3); + if (kernel) { + x86_write_percpu(xen_cr3, cr3); + + /* Update xen_current_cr3 once the batch has actually + been submitted. */ + xen_mc_callback(set_current_cr3, (void *)cr3); + } +} + +static void xen_write_cr3(unsigned long cr3) +{ + BUG_ON(preemptible()); + + xen_mc_batch(); /* disables interrupts */ + + /* Update while interrupts are disabled, so its atomic with + respect to ipis */ + x86_write_percpu(xen_cr3, cr3); + + __xen_write_cr3(true, cr3); + +#ifdef CONFIG_X86_64 + { + pgd_t *user_pgd = xen_get_user_pgd(__va(cr3)); + if (user_pgd) + __xen_write_cr3(false, __pa(user_pgd)); + else + __xen_write_cr3(false, 0); + } +#endif xen_mc_issue(PARAVIRT_LAZY_CPU); /* interrupts restored */ } +static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high) +{ + int ret; + + ret = 0; + + switch(msr) { +#ifdef CONFIG_X86_64 + unsigned which; + u64 base; + + case MSR_FS_BASE: which = SEGBASE_FS; goto set; + case MSR_KERNEL_GS_BASE: which = SEGBASE_GS_USER; goto set; + case MSR_GS_BASE: which = SEGBASE_GS_KERNEL; goto set; + + set: + base = ((u64)high << 32) | low; + if (HYPERVISOR_set_segment_base(which, base) != 0) + ret = -EFAULT; + break; +#endif + default: + ret = native_write_msr_safe(msr, low, high); + } + + return ret; +} + /* Early in boot, while setting up the initial pagetable, assume everything is pinned. */ static __init void xen_alloc_pte_init(struct mm_struct *mm, u32 pfn) @@ -778,6 +866,48 @@ static void xen_alloc_pmd(struct mm_struct *mm, u32 pfn) xen_alloc_ptpage(mm, pfn, PT_PMD); } +static int xen_pgd_alloc(struct mm_struct *mm) +{ + pgd_t *pgd = mm->pgd; + int ret = 0; + + BUG_ON(PagePinned(virt_to_page(pgd))); + +#ifdef CONFIG_X86_64 + { + struct page *page = virt_to_page(pgd); + pgd_t *user_pgd; + + BUG_ON(page->private != 0); + + ret = -ENOMEM; + + user_pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); + page->private = (unsigned long)user_pgd; + + if (user_pgd != NULL) { + user_pgd[pgd_index(VSYSCALL_START)] = + __pgd(__pa(level3_user_vsyscall) | _PAGE_TABLE); + ret = 0; + } + + BUG_ON(PagePinned(virt_to_page(xen_get_user_pgd(pgd)))); + } +#endif + + return ret; +} + +static void xen_pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ +#ifdef CONFIG_X86_64 + pgd_t *user_pgd = xen_get_user_pgd(pgd); + + if (user_pgd) + free_page((unsigned long)user_pgd); +#endif +} + /* This should never happen until we're OK to use struct page */ static void xen_release_ptpage(u32 pfn, unsigned level) { @@ -803,6 +933,18 @@ static void xen_release_pmd(u32 pfn) xen_release_ptpage(pfn, PT_PMD); } +#if PAGETABLE_LEVELS == 4 +static void xen_alloc_pud(struct mm_struct *mm, u32 pfn) +{ + xen_alloc_ptpage(mm, pfn, PT_PUD); +} + +static void xen_release_pud(u32 pfn) +{ + xen_release_ptpage(pfn, PT_PUD); +} +#endif + #ifdef CONFIG_HIGHPTE static void *xen_kmap_atomic_pte(struct page *page, enum km_type type) { @@ -841,68 +983,16 @@ static __init void xen_set_pte_init(pte_t *ptep, pte_t pte) static __init void xen_pagetable_setup_start(pgd_t *base) { - pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base; - int i; - - /* special set_pte for pagetable initialization */ - pv_mmu_ops.set_pte = xen_set_pte_init; - - init_mm.pgd = base; - /* - * copy top-level of Xen-supplied pagetable into place. This - * is a stand-in while we copy the pmd pages. - */ - memcpy(base, xen_pgd, PTRS_PER_PGD * sizeof(pgd_t)); - - /* - * For PAE, need to allocate new pmds, rather than - * share Xen's, since Xen doesn't like pmd's being - * shared between address spaces. - */ - for (i = 0; i < PTRS_PER_PGD; i++) { - if (pgd_val_ma(xen_pgd[i]) & _PAGE_PRESENT) { - pmd_t *pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE); - - memcpy(pmd, (void *)pgd_page_vaddr(xen_pgd[i]), - PAGE_SIZE); - - make_lowmem_page_readonly(pmd); - - set_pgd(&base[i], __pgd(1 + __pa(pmd))); - } else - pgd_clear(&base[i]); - } - - /* make sure zero_page is mapped RO so we can use it in pagetables */ - make_lowmem_page_readonly(empty_zero_page); - make_lowmem_page_readonly(base); - /* - * Switch to new pagetable. This is done before - * pagetable_init has done anything so that the new pages - * added to the table can be prepared properly for Xen. - */ - xen_write_cr3(__pa(base)); - - /* Unpin initial Xen pagetable */ - pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, - PFN_DOWN(__pa(xen_start_info->pt_base))); } void xen_setup_shared_info(void) { if (!xen_feature(XENFEAT_auto_translated_physmap)) { - unsigned long addr = fix_to_virt(FIX_PARAVIRT_BOOTMAP); - - /* - * Create a mapping for the shared info page. - * Should be set_fixmap(), but shared_info is a machine - * address with no corresponding pseudo-phys address. - */ - set_pte_mfn(addr, - PFN_DOWN(xen_start_info->shared_info), - PAGE_KERNEL); - - HYPERVISOR_shared_info = (struct shared_info *)addr; + set_fixmap(FIX_PARAVIRT_BOOTMAP, + xen_start_info->shared_info); + + HYPERVISOR_shared_info = + (struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP); } else HYPERVISOR_shared_info = (struct shared_info *)__va(xen_start_info->shared_info); @@ -917,26 +1007,32 @@ void xen_setup_shared_info(void) static __init void xen_pagetable_setup_done(pgd_t *base) { - /* This will work as long as patching hasn't happened yet - (which it hasn't) */ - pv_mmu_ops.alloc_pte = xen_alloc_pte; - pv_mmu_ops.alloc_pmd = xen_alloc_pmd; - pv_mmu_ops.release_pte = xen_release_pte; - pv_mmu_ops.release_pmd = xen_release_pmd; - pv_mmu_ops.set_pte = xen_set_pte; - xen_setup_shared_info(); - - /* Actually pin the pagetable down, but we can't set PG_pinned - yet because the page structures don't exist yet. */ - pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(base))); } static __init void xen_post_allocator_init(void) { + pv_mmu_ops.set_pte = xen_set_pte; pv_mmu_ops.set_pmd = xen_set_pmd; pv_mmu_ops.set_pud = xen_set_pud; +#if PAGETABLE_LEVELS == 4 + pv_mmu_ops.set_pgd = xen_set_pgd; +#endif + + /* This will work as long as patching hasn't happened yet + (which it hasn't) */ + pv_mmu_ops.alloc_pte = xen_alloc_pte; + pv_mmu_ops.alloc_pmd = xen_alloc_pmd; + pv_mmu_ops.release_pte = xen_release_pte; + pv_mmu_ops.release_pmd = xen_release_pmd; +#if PAGETABLE_LEVELS == 4 + pv_mmu_ops.alloc_pud = xen_alloc_pud; + pv_mmu_ops.release_pud = xen_release_pud; +#endif +#ifdef CONFIG_X86_64 + SetPagePinned(virt_to_page(level3_user_vsyscall)); +#endif xen_mark_init_mm_pinned(); } @@ -950,6 +1046,7 @@ void xen_setup_vcpu_info_placement(void) /* xen_vcpu_setup managed to place the vcpu_info within the percpu area for all cpus, so make use of it */ +#ifdef CONFIG_X86_32 if (have_vcpu_info_placement) { printk(KERN_INFO "Xen: using vcpu_info placement\n"); @@ -959,6 +1056,7 @@ void xen_setup_vcpu_info_placement(void) pv_irq_ops.irq_enable = xen_irq_enable_direct; pv_mmu_ops.read_cr2 = xen_read_cr2_direct; } +#endif } static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf, @@ -979,10 +1077,12 @@ static unsigned xen_patch(u8 type, u16 clobbers, void *insnbuf, goto patch_site switch (type) { +#ifdef CONFIG_X86_32 SITE(pv_irq_ops, irq_enable); SITE(pv_irq_ops, irq_disable); SITE(pv_irq_ops, save_fl); SITE(pv_irq_ops, restore_fl); +#endif /* CONFIG_X86_32 */ #undef SITE patch_site: @@ -1025,8 +1125,15 @@ static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot) #ifdef CONFIG_X86_F00F_BUG case FIX_F00F_IDT: #endif +#ifdef CONFIG_X86_32 case FIX_WP_TEST: case FIX_VDSO: +# ifdef CONFIG_HIGHMEM + case FIX_KMAP_BEGIN ... FIX_KMAP_END: +# endif +#else + case VSYSCALL_LAST_PAGE ... VSYSCALL_FIRST_PAGE: +#endif #ifdef CONFIG_X86_LOCAL_APIC case FIX_APIC_BASE: /* maps dummy local APIC */ #endif @@ -1039,6 +1146,15 @@ static void xen_set_fixmap(unsigned idx, unsigned long phys, pgprot_t prot) } __native_set_fixmap(idx, pte); + +#ifdef CONFIG_X86_64 + /* Replicate changes to map the vsyscall page into the user + pagetable vsyscall mapping. */ + if (idx >= VSYSCALL_LAST_PAGE && idx <= VSYSCALL_FIRST_PAGE) { + unsigned long vaddr = __fix_to_virt(idx); + set_pte_vaddr_pud(level3_user_vsyscall, vaddr, pte); + } +#endif } static const struct pv_info xen_info __initdata = { @@ -1084,18 +1200,25 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = { .wbinvd = native_wbinvd, .read_msr = native_read_msr_safe, - .write_msr = native_write_msr_safe, + .write_msr = xen_write_msr_safe, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, .iret = xen_iret, .irq_enable_sysexit = xen_sysexit, +#ifdef CONFIG_X86_64 + .usergs_sysret32 = xen_sysret32, + .usergs_sysret64 = xen_sysret64, +#endif .load_tr_desc = paravirt_nop, .set_ldt = xen_set_ldt, .load_gdt = xen_load_gdt, .load_idt = xen_load_idt, .load_tls = xen_load_tls, +#ifdef CONFIG_X86_64 + .load_gs_index = xen_load_gs_index, +#endif .store_gdt = native_store_gdt, .store_idt = native_store_idt, @@ -1109,14 +1232,34 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = { .set_iopl_mask = xen_set_iopl_mask, .io_delay = xen_io_delay, + /* Xen takes care of %gs when switching to usermode for us */ + .swapgs = paravirt_nop, + .lazy_mode = { .enter = paravirt_enter_lazy_cpu, .leave = xen_leave_lazy, }, }; +static void __init __xen_init_IRQ(void) +{ +#ifdef CONFIG_X86_64 + int i; + + /* Create identity vector->irq map */ + for(i = 0; i < NR_VECTORS; i++) { + int cpu; + + for_each_possible_cpu(cpu) + per_cpu(vector_irq, cpu)[i] = i; + } +#endif /* CONFIG_X86_64 */ + + xen_init_IRQ(); +} + static const struct pv_irq_ops xen_irq_ops __initdata = { - .init_IRQ = xen_init_IRQ, + .init_IRQ = __xen_init_IRQ, .save_fl = xen_save_fl, .restore_fl = xen_restore_fl, .irq_disable = xen_irq_disable, @@ -1124,14 +1267,13 @@ static const struct pv_irq_ops xen_irq_ops __initdata = { .safe_halt = xen_safe_halt, .halt = xen_halt, #ifdef CONFIG_X86_64 - .adjust_exception_frame = paravirt_nop, + .adjust_exception_frame = xen_adjust_exception_frame, #endif }; static const struct pv_apic_ops xen_apic_ops __initdata = { #ifdef CONFIG_X86_LOCAL_APIC .apic_write = xen_apic_write, - .apic_write_atomic = xen_apic_write, .apic_read = xen_apic_read, .setup_boot_clock = paravirt_nop, .setup_secondary_clock = paravirt_nop, @@ -1157,8 +1299,8 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .pte_update = paravirt_nop, .pte_update_defer = paravirt_nop, - .pgd_alloc = __paravirt_pgd_alloc, - .pgd_free = paravirt_nop, + .pgd_alloc = xen_pgd_alloc, + .pgd_free = xen_pgd_free, .alloc_pte = xen_alloc_pte_init, .release_pte = xen_release_pte_init, @@ -1170,7 +1312,11 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .kmap_atomic_pte = xen_kmap_atomic_pte, #endif - .set_pte = NULL, /* see xen_pagetable_setup_* */ +#ifdef CONFIG_X86_64 + .set_pte = xen_set_pte, +#else + .set_pte = xen_set_pte_init, +#endif .set_pte_at = xen_set_pte_at, .set_pmd = xen_set_pmd_hyper, @@ -1184,15 +1330,26 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .make_pte = xen_make_pte, .make_pgd = xen_make_pgd, +#ifdef CONFIG_X86_PAE .set_pte_atomic = xen_set_pte_atomic, .set_pte_present = xen_set_pte_at, - .set_pud = xen_set_pud_hyper, .pte_clear = xen_pte_clear, .pmd_clear = xen_pmd_clear, +#endif /* CONFIG_X86_PAE */ + .set_pud = xen_set_pud_hyper, .make_pmd = xen_make_pmd, .pmd_val = xen_pmd_val, +#if PAGETABLE_LEVELS == 4 + .pud_val = xen_pud_val, + .make_pud = xen_make_pud, + .set_pgd = xen_set_pgd_hyper, + + .alloc_pud = xen_alloc_pte_init, + .release_pud = xen_release_pte_init, +#endif /* PAGETABLE_LEVELS == 4 */ + .activate_mm = xen_activate_mm, .dup_mmap = xen_dup_mmap, .exit_mmap = xen_exit_mmap, @@ -1205,21 +1362,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .set_fixmap = xen_set_fixmap, }; -#ifdef CONFIG_SMP -static const struct smp_ops xen_smp_ops __initdata = { - .smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu, - .smp_prepare_cpus = xen_smp_prepare_cpus, - .cpu_up = xen_cpu_up, - .smp_cpus_done = xen_smp_cpus_done, - - .smp_send_stop = xen_smp_send_stop, - .smp_send_reschedule = xen_smp_send_reschedule, - - .send_call_func_ipi = xen_smp_send_call_function_ipi, - .send_call_func_single_ipi = xen_smp_send_call_function_single_ipi, -}; -#endif /* CONFIG_SMP */ - static void xen_reboot(int reason) { struct sched_shutdown r = { .reason = reason }; @@ -1264,6 +1406,7 @@ static const struct machine_ops __initdata xen_machine_ops = { static void __init xen_reserve_top(void) { +#ifdef CONFIG_X86_32 unsigned long top = HYPERVISOR_VIRT_START; struct xen_platform_parameters pp; @@ -1271,8 +1414,248 @@ static void __init xen_reserve_top(void) top = pp.virt_start; reserve_top_address(-top + 2 * PAGE_SIZE); +#endif /* CONFIG_X86_32 */ +} + +/* + * Like __va(), but returns address in the kernel mapping (which is + * all we have until the physical memory mapping has been set up. + */ +static void *__ka(phys_addr_t paddr) +{ +#ifdef CONFIG_X86_64 + return (void *)(paddr + __START_KERNEL_map); +#else + return __va(paddr); +#endif } +/* Convert a machine address to physical address */ +static unsigned long m2p(phys_addr_t maddr) +{ + phys_addr_t paddr; + + maddr &= PTE_MASK; + paddr = mfn_to_pfn(maddr >> PAGE_SHIFT) << PAGE_SHIFT; + + return paddr; +} + +/* Convert a machine address to kernel virtual */ +static void *m2v(phys_addr_t maddr) +{ + return __ka(m2p(maddr)); +} + +#ifdef CONFIG_X86_64 +static void walk(pgd_t *pgd, unsigned long addr) +{ + unsigned l4idx = pgd_index(addr); + unsigned l3idx = pud_index(addr); + unsigned l2idx = pmd_index(addr); + unsigned l1idx = pte_index(addr); + pgd_t l4; + pud_t l3; + pmd_t l2; + pte_t l1; + + xen_raw_printk("walk %p, %lx -> %d %d %d %d\n", + pgd, addr, l4idx, l3idx, l2idx, l1idx); + + l4 = pgd[l4idx]; + xen_raw_printk(" l4: %016lx\n", l4.pgd); + xen_raw_printk(" %016lx\n", pgd_val(l4)); + + l3 = ((pud_t *)(m2v(l4.pgd)))[l3idx]; + xen_raw_printk(" l3: %016lx\n", l3.pud); + xen_raw_printk(" %016lx\n", pud_val(l3)); + + l2 = ((pmd_t *)(m2v(l3.pud)))[l2idx]; + xen_raw_printk(" l2: %016lx\n", l2.pmd); + xen_raw_printk(" %016lx\n", pmd_val(l2)); + + l1 = ((pte_t *)(m2v(l2.pmd)))[l1idx]; + xen_raw_printk(" l1: %016lx\n", l1.pte); + xen_raw_printk(" %016lx\n", pte_val(l1)); +} +#endif + +static void set_page_prot(void *addr, pgprot_t prot) +{ + unsigned long pfn = __pa(addr) >> PAGE_SHIFT; + pte_t pte = pfn_pte(pfn, prot); + + xen_raw_printk("addr=%p pfn=%lx mfn=%lx prot=%016llx pte=%016llx\n", + addr, pfn, get_phys_to_machine(pfn), + pgprot_val(prot), pte.pte); + + if (HYPERVISOR_update_va_mapping((unsigned long)addr, pte, 0)) + BUG(); +} + +static __init void xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn) +{ + unsigned pmdidx, pteidx; + unsigned ident_pte; + unsigned long pfn; + + ident_pte = 0; + pfn = 0; + for(pmdidx = 0; pmdidx < PTRS_PER_PMD && pfn < max_pfn; pmdidx++) { + pte_t *pte_page; + + /* Reuse or allocate a page of ptes */ + if (pmd_present(pmd[pmdidx])) + pte_page = m2v(pmd[pmdidx].pmd); + else { + /* Check for free pte pages */ + if (ident_pte == ARRAY_SIZE(level1_ident_pgt)) + break; + + pte_page = &level1_ident_pgt[ident_pte]; + ident_pte += PTRS_PER_PTE; + + pmd[pmdidx] = __pmd(__pa(pte_page) | _PAGE_TABLE); + } + + /* Install mappings */ + for(pteidx = 0; pteidx < PTRS_PER_PTE; pteidx++, pfn++) { + pte_t pte; + + if (pfn > max_pfn_mapped) + max_pfn_mapped = pfn; + + if (!pte_none(pte_page[pteidx])) + continue; + + pte = pfn_pte(pfn, PAGE_KERNEL_EXEC); + pte_page[pteidx] = pte; + } + } + + for(pteidx = 0; pteidx < ident_pte; pteidx += PTRS_PER_PTE) + set_page_prot(&level1_ident_pgt[pteidx], PAGE_KERNEL_RO); + + set_page_prot(pmd, PAGE_KERNEL_RO); +} + +#ifdef CONFIG_X86_64 +static void convert_pfn_mfn(void *v) +{ + pte_t *pte = v; + int i; + + /* All levels are converted the same way, so just treat them + as ptes. */ + for(i = 0; i < PTRS_PER_PTE; i++) + pte[i] = xen_make_pte(pte[i].pte); +} + +/* + * Set up the inital kernel pagetable. + * + * We can construct this by grafting the Xen provided pagetable into + * head_64.S's preconstructed pagetables. We copy the Xen L2's into + * level2_ident_pgt, level2_kernel_pgt and level2_fixmap_pgt. This + * means that only the kernel has a physical mapping to start with - + * but that's enough to get __va working. We need to fill in the rest + * of the physical mapping once some sort of allocator has been set + * up. + */ +static __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) +{ + pud_t *l3; + pmd_t *l2; + + /* Zap identity mapping */ + init_level4_pgt[0] = __pgd(0); + + /* Pre-constructed entries are in pfn, so convert to mfn */ + convert_pfn_mfn(init_level4_pgt); + convert_pfn_mfn(level3_ident_pgt); + convert_pfn_mfn(level3_kernel_pgt); + + l3 = m2v(pgd[pgd_index(__START_KERNEL_map)].pgd); + l2 = m2v(l3[pud_index(__START_KERNEL_map)].pud); + + memcpy(level2_ident_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + memcpy(level2_kernel_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + + l3 = m2v(pgd[pgd_index(__START_KERNEL_map + PMD_SIZE)].pgd); + l2 = m2v(l3[pud_index(__START_KERNEL_map + PMD_SIZE)].pud); + memcpy(level2_fixmap_pgt, l2, sizeof(pmd_t) * PTRS_PER_PMD); + + /* Set up identity map */ + xen_map_identity_early(level2_ident_pgt, max_pfn); + + /* Make pagetable pieces RO */ + set_page_prot(init_level4_pgt, PAGE_KERNEL_RO); + set_page_prot(level3_ident_pgt, PAGE_KERNEL_RO); + set_page_prot(level3_kernel_pgt, PAGE_KERNEL_RO); + set_page_prot(level3_user_vsyscall, PAGE_KERNEL_RO); + set_page_prot(level2_kernel_pgt, PAGE_KERNEL_RO); + set_page_prot(level2_fixmap_pgt, PAGE_KERNEL_RO); + + /* Pin down new L4 */ + pin_pagetable_pfn(MMUEXT_PIN_L4_TABLE, + PFN_DOWN(__pa_symbol(init_level4_pgt))); + + /* Unpin Xen-provided one */ + pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(pgd))); + + /* Switch over */ + pgd = init_level4_pgt; + + /* + * At this stage there can be no user pgd, and no page + * structure to attach it to, so make sure we just set kernel + * pgd. + */ + xen_mc_batch(); + __xen_write_cr3(true, __pa(pgd)); + xen_mc_issue(PARAVIRT_LAZY_CPU); + + reserve_early(__pa(xen_start_info->pt_base), + __pa(xen_start_info->pt_base + + xen_start_info->nr_pt_frames * PAGE_SIZE), + "XEN PAGETABLES"); + + return pgd; +} +#else /* !CONFIG_X86_64 */ +static pmd_t level2_kernel_pgt[PTRS_PER_PMD] __page_aligned_bss; + +static __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) +{ + pmd_t *kernel_pmd; + + init_pg_tables_start = __pa(pgd); + init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE; + max_pfn_mapped = PFN_DOWN(init_pg_tables_end + 512*1024); + + kernel_pmd = m2v(pgd[KERNEL_PGD_BOUNDARY].pgd); + memcpy(level2_kernel_pgt, kernel_pmd, sizeof(pmd_t) * PTRS_PER_PMD); + + xen_map_identity_early(level2_kernel_pgt, max_pfn); + + memcpy(swapper_pg_dir, pgd, sizeof(pgd_t) * PTRS_PER_PGD); + set_pgd(&swapper_pg_dir[KERNEL_PGD_BOUNDARY], + __pgd(__pa(level2_kernel_pgt) | _PAGE_PRESENT)); + + set_page_prot(level2_kernel_pgt, PAGE_KERNEL_RO); + set_page_prot(swapper_pg_dir, PAGE_KERNEL_RO); + set_page_prot(empty_zero_page, PAGE_KERNEL_RO); + + pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(pgd))); + + xen_write_cr3(__pa(swapper_pg_dir)); + + pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir))); + + return swapper_pg_dir; +} +#endif /* CONFIG_X86_64 */ + /* First C function to be called on Xen boot */ asmlinkage void __init xen_start_kernel(void) { @@ -1301,53 +1684,56 @@ asmlinkage void __init xen_start_kernel(void) machine_ops = xen_machine_ops; -#ifdef CONFIG_SMP - smp_ops = xen_smp_ops; +#ifdef CONFIG_X86_64 + /* Disable until direct per-cpu data access. */ + have_vcpu_info_placement = 0; + x86_64_init_pda(); #endif + xen_smp_init(); + /* Get mfn list */ if (!xen_feature(XENFEAT_auto_translated_physmap)) xen_build_dynamic_phys_to_machine(); pgd = (pgd_t *)xen_start_info->pt_base; - init_pg_tables_start = __pa(pgd); - init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE; - max_pfn_mapped = (init_pg_tables_end + 512*1024) >> PAGE_SHIFT; - - init_mm.pgd = pgd; /* use the Xen pagetables to start */ - - /* keep using Xen gdt for now; no urgent need to change it */ - - x86_write_percpu(xen_cr3, __pa(pgd)); - x86_write_percpu(xen_current_cr3, __pa(pgd)); + /* Prevent unwanted bits from being set in PTEs. */ + __supported_pte_mask &= ~_PAGE_GLOBAL; + if (!is_initial_xendomain()) + __supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD); /* Don't do the full vcpu_info placement stuff until we have a possible map and a non-dummy shared_info. */ per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0]; + xen_raw_console_write("mapping kernel into physical memory\n"); + pgd = xen_setup_kernel_pagetable(pgd, xen_start_info->nr_pages); + + init_mm.pgd = pgd; + + /* keep using Xen gdt for now; no urgent need to change it */ + pv_info.kernel_rpl = 1; if (xen_feature(XENFEAT_supervisor_mode_kernel)) pv_info.kernel_rpl = 0; - /* Prevent unwanted bits from being set in PTEs. */ - __supported_pte_mask &= ~_PAGE_GLOBAL; - if (!is_initial_xendomain()) - __supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD); - /* set the limit of our address space */ xen_reserve_top(); +#ifdef CONFIG_X86_32 /* set up basic CPUID stuff */ cpu_detect(&new_cpu_data); new_cpu_data.hard_math = 1; new_cpu_data.x86_capability[0] = cpuid_edx(1); +#endif /* Poke various useful things into boot_params */ boot_params.hdr.type_of_loader = (9 << 4) | 0; boot_params.hdr.ramdisk_image = xen_start_info->mod_start ? __pa(xen_start_info->mod_start) : 0; boot_params.hdr.ramdisk_size = xen_start_info->mod_len; + boot_params.hdr.cmd_line_ptr = __pa(xen_start_info->cmd_line); if (!is_initial_xendomain()) { add_preferred_console("xenboot", 0, NULL); @@ -1355,6 +1741,21 @@ asmlinkage void __init xen_start_kernel(void) add_preferred_console("hvc", 0, NULL); } + xen_raw_console_write("about to get started...\n"); + +#if 0 + xen_raw_printk("&boot_params=%p __pa(&boot_params)=%lx __va(__pa(&boot_params))=%lx\n", + &boot_params, __pa_symbol(&boot_params), + __va(__pa_symbol(&boot_params))); + + walk(pgd, &boot_params); + walk(pgd, __va(__pa(&boot_params))); +#endif + /* Start the world */ +#ifdef CONFIG_X86_32 i386_start_kernel(); +#else + x86_64_start_reservations((char *)__pa_symbol(&boot_params)); +#endif } diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index ff0aa74afaa..a44d56e38bd 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -44,8 +44,10 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> +#include <asm/fixmap.h> #include <asm/mmu_context.h> #include <asm/paravirt.h> +#include <asm/linkage.h> #include <asm/xen/hypercall.h> #include <asm/xen/hypervisor.h> @@ -56,26 +58,29 @@ #include "multicalls.h" #include "mmu.h" +/* + * Just beyond the highest usermode address. STACK_TOP_MAX has a + * redzone above it, so round it up to a PGD boundary. + */ +#define USER_LIMIT ((STACK_TOP_MAX + PGDIR_SIZE - 1) & PGDIR_MASK) + + #define P2M_ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) #define TOP_ENTRIES (MAX_DOMAIN_PAGES / P2M_ENTRIES_PER_PAGE) /* Placeholder for holes in the address space */ -static unsigned long p2m_missing[P2M_ENTRIES_PER_PAGE] - __attribute__((section(".data.page_aligned"))) = +static unsigned long p2m_missing[P2M_ENTRIES_PER_PAGE] __page_aligned_data = { [ 0 ... P2M_ENTRIES_PER_PAGE-1 ] = ~0UL }; /* Array of pointers to pages containing p2m entries */ -static unsigned long *p2m_top[TOP_ENTRIES] - __attribute__((section(".data.page_aligned"))) = +static unsigned long *p2m_top[TOP_ENTRIES] __page_aligned_data = { [ 0 ... TOP_ENTRIES - 1] = &p2m_missing[0] }; /* Arrays of p2m arrays expressed in mfns used for save/restore */ -static unsigned long p2m_top_mfn[TOP_ENTRIES] - __attribute__((section(".bss.page_aligned"))); +static unsigned long p2m_top_mfn[TOP_ENTRIES] __page_aligned_bss; -static unsigned long p2m_top_mfn_list[ - PAGE_ALIGN(TOP_ENTRIES / P2M_ENTRIES_PER_PAGE)] - __attribute__((section(".bss.page_aligned"))); +static unsigned long p2m_top_mfn_list[TOP_ENTRIES / P2M_ENTRIES_PER_PAGE] + __page_aligned_bss; static inline unsigned p2m_top_index(unsigned long pfn) { @@ -181,15 +186,16 @@ void set_phys_to_machine(unsigned long pfn, unsigned long mfn) p2m_top[topidx][idx] = mfn; } -xmaddr_t arbitrary_virt_to_machine(unsigned long address) +xmaddr_t arbitrary_virt_to_machine(void *vaddr) { + unsigned long address = (unsigned long)vaddr; unsigned int level; pte_t *pte = lookup_address(address, &level); unsigned offset = address & ~PAGE_MASK; BUG_ON(pte == NULL); - return XMADDR((pte_mfn(*pte) << PAGE_SHIFT) + offset); + return XMADDR(((phys_addr_t)pte_mfn(*pte) << PAGE_SHIFT) + offset); } void make_lowmem_page_readonly(void *vaddr) @@ -256,7 +262,8 @@ void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val) xen_mc_batch(); - u.ptr = virt_to_machine(ptr).maddr; + /* ptr may be ioremapped for 64-bit pagetable setup */ + u.ptr = arbitrary_virt_to_machine(ptr).maddr; u.val = pmd_val_ma(val); extend_mmu_update(&u); @@ -283,35 +290,7 @@ void xen_set_pmd(pmd_t *ptr, pmd_t val) */ void set_pte_mfn(unsigned long vaddr, unsigned long mfn, pgprot_t flags) { - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - pgd = swapper_pg_dir + pgd_index(vaddr); - if (pgd_none(*pgd)) { - BUG(); - return; - } - pud = pud_offset(pgd, vaddr); - if (pud_none(*pud)) { - BUG(); - return; - } - pmd = pmd_offset(pud, vaddr); - if (pmd_none(*pmd)) { - BUG(); - return; - } - pte = pte_offset_kernel(pmd, vaddr); - /* <mfn,flags> stored as-is, to permit clearing entries */ - xen_set_pte(pte, mfn_pte(mfn, flags)); - - /* - * It's enough to flush this one mapping. - * (PGE mappings get flushed as well) - */ - __flush_tlb_one(vaddr); + set_pte_vaddr(vaddr, mfn_pte(mfn, flags)); } void xen_set_pte_at(struct mm_struct *mm, unsigned long addr, @@ -418,7 +397,8 @@ void xen_set_pud_hyper(pud_t *ptr, pud_t val) xen_mc_batch(); - u.ptr = virt_to_machine(ptr).maddr; + /* ptr may be ioremapped for 64-bit pagetable setup */ + u.ptr = arbitrary_virt_to_machine(ptr).maddr; u.val = pud_val_ma(val); extend_mmu_update(&u); @@ -441,14 +421,19 @@ void xen_set_pud(pud_t *ptr, pud_t val) void xen_set_pte(pte_t *ptep, pte_t pte) { +#ifdef CONFIG_X86_PAE ptep->pte_high = pte.pte_high; smp_wmb(); ptep->pte_low = pte.pte_low; +#else + *ptep = pte; +#endif } +#ifdef CONFIG_X86_PAE void xen_set_pte_atomic(pte_t *ptep, pte_t pte) { - set_64bit((u64 *)ptep, pte_val_ma(pte)); + set_64bit((u64 *)ptep, native_pte_val(pte)); } void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) @@ -462,6 +447,7 @@ void xen_pmd_clear(pmd_t *pmdp) { set_pmd(pmdp, __pmd(0)); } +#endif /* CONFIG_X86_PAE */ pmd_t xen_make_pmd(pmdval_t pmd) { @@ -469,78 +455,189 @@ pmd_t xen_make_pmd(pmdval_t pmd) return native_make_pmd(pmd); } +#if PAGETABLE_LEVELS == 4 +pudval_t xen_pud_val(pud_t pud) +{ + return pte_mfn_to_pfn(pud.pud); +} + +pud_t xen_make_pud(pudval_t pud) +{ + pud = pte_pfn_to_mfn(pud); + + return native_make_pud(pud); +} + +pgd_t *xen_get_user_pgd(pgd_t *pgd) +{ + pgd_t *pgd_page = (pgd_t *)(((unsigned long)pgd) & PAGE_MASK); + unsigned offset = pgd - pgd_page; + pgd_t *user_ptr = NULL; + + if (offset < pgd_index(USER_LIMIT)) { + struct page *page = virt_to_page(pgd_page); + user_ptr = (pgd_t *)page->private; + if (user_ptr) + user_ptr += offset; + } + + return user_ptr; +} + +static void __xen_set_pgd_hyper(pgd_t *ptr, pgd_t val) +{ + struct mmu_update u; + + u.ptr = virt_to_machine(ptr).maddr; + u.val = pgd_val_ma(val); + extend_mmu_update(&u); +} + +/* + * Raw hypercall-based set_pgd, intended for in early boot before + * there's a page structure. This implies: + * 1. The only existing pagetable is the kernel's + * 2. It is always pinned + * 3. It has no user pagetable attached to it + */ +void __init xen_set_pgd_hyper(pgd_t *ptr, pgd_t val) +{ + preempt_disable(); + + xen_mc_batch(); + + __xen_set_pgd_hyper(ptr, val); + + xen_mc_issue(PARAVIRT_LAZY_MMU); + + preempt_enable(); +} + +void xen_set_pgd(pgd_t *ptr, pgd_t val) +{ + pgd_t *user_ptr = xen_get_user_pgd(ptr); + + /* If page is not pinned, we can just update the entry + directly */ + if (!page_pinned(ptr)) { + *ptr = val; + if (user_ptr) { + WARN_ON(page_pinned(user_ptr)); + *user_ptr = val; + } + return; + } + + /* If it's pinned, then we can at least batch the kernel and + user updates together. */ + xen_mc_batch(); + + __xen_set_pgd_hyper(ptr, val); + if (user_ptr) + __xen_set_pgd_hyper(user_ptr, val); + + xen_mc_issue(PARAVIRT_LAZY_MMU); +} +#endif /* PAGETABLE_LEVELS == 4 */ + /* - (Yet another) pagetable walker. This one is intended for pinning a - pagetable. This means that it walks a pagetable and calls the - callback function on each page it finds making up the page table, - at every level. It walks the entire pagetable, but it only bothers - pinning pte pages which are below pte_limit. In the normal case - this will be TASK_SIZE, but at boot we need to pin up to - FIXADDR_TOP. But the important bit is that we don't pin beyond - there, because then we start getting into Xen's ptes. -*/ -static int pgd_walk(pgd_t *pgd_base, int (*func)(struct page *, enum pt_level), + * (Yet another) pagetable walker. This one is intended for pinning a + * pagetable. This means that it walks a pagetable and calls the + * callback function on each page it finds making up the page table, + * at every level. It walks the entire pagetable, but it only bothers + * pinning pte pages which are below limit. In the normal case this + * will be STACK_TOP_MAX, but at boot we need to pin up to + * FIXADDR_TOP. + * + * For 32-bit the important bit is that we don't pin beyond there, + * because then we start getting into Xen's ptes. + * + * For 64-bit, we must skip the Xen hole in the middle of the address + * space, just after the big x86-64 virtual hole. + */ +static int pgd_walk(pgd_t *pgd, int (*func)(struct page *, enum pt_level), unsigned long limit) { - pgd_t *pgd = pgd_base; int flush = 0; - unsigned long addr = 0; - unsigned long pgd_next; + unsigned hole_low, hole_high; + unsigned pgdidx_limit, pudidx_limit, pmdidx_limit; + unsigned pgdidx, pudidx, pmdidx; - BUG_ON(limit > FIXADDR_TOP); + /* The limit is the last byte to be touched */ + limit--; + BUG_ON(limit >= FIXADDR_TOP); if (xen_feature(XENFEAT_auto_translated_physmap)) return 0; - for (; addr != FIXADDR_TOP; pgd++, addr = pgd_next) { + /* + * 64-bit has a great big hole in the middle of the address + * space, which contains the Xen mappings. On 32-bit these + * will end up making a zero-sized hole and so is a no-op. + */ + hole_low = pgd_index(USER_LIMIT); + hole_high = pgd_index(PAGE_OFFSET); + + pgdidx_limit = pgd_index(limit); +#if PTRS_PER_PUD > 1 + pudidx_limit = pud_index(limit); +#else + pudidx_limit = 0; +#endif +#if PTRS_PER_PMD > 1 + pmdidx_limit = pmd_index(limit); +#else + pmdidx_limit = 0; +#endif + + flush |= (*func)(virt_to_page(pgd), PT_PGD); + + for (pgdidx = 0; pgdidx <= pgdidx_limit; pgdidx++) { pud_t *pud; - unsigned long pud_limit, pud_next; - pgd_next = pud_limit = pgd_addr_end(addr, FIXADDR_TOP); + if (pgdidx >= hole_low && pgdidx < hole_high) + continue; - if (!pgd_val(*pgd)) + if (!pgd_val(pgd[pgdidx])) continue; - pud = pud_offset(pgd, 0); + pud = pud_offset(&pgd[pgdidx], 0); if (PTRS_PER_PUD > 1) /* not folded */ flush |= (*func)(virt_to_page(pud), PT_PUD); - for (; addr != pud_limit; pud++, addr = pud_next) { + for (pudidx = 0; pudidx < PTRS_PER_PUD; pudidx++) { pmd_t *pmd; - unsigned long pmd_limit; - pud_next = pud_addr_end(addr, pud_limit); - - if (pud_next < limit) - pmd_limit = pud_next; - else - pmd_limit = limit; + if (pgdidx == pgdidx_limit && + pudidx > pudidx_limit) + goto out; - if (pud_none(*pud)) + if (pud_none(pud[pudidx])) continue; - pmd = pmd_offset(pud, 0); + pmd = pmd_offset(&pud[pudidx], 0); if (PTRS_PER_PMD > 1) /* not folded */ flush |= (*func)(virt_to_page(pmd), PT_PMD); - for (; addr != pmd_limit; pmd++) { - addr += (PAGE_SIZE * PTRS_PER_PTE); - if ((pmd_limit-1) < (addr-1)) { - addr = pmd_limit; - break; - } + for (pmdidx = 0; pmdidx < PTRS_PER_PMD; pmdidx++) { + struct page *pte; + + if (pgdidx == pgdidx_limit && + pudidx == pudidx_limit && + pmdidx > pmdidx_limit) + goto out; - if (pmd_none(*pmd)) + if (pmd_none(pmd[pmdidx])) continue; - flush |= (*func)(pmd_page(*pmd), PT_PTE); + pte = pmd_page(pmd[pmdidx]); + flush |= (*func)(pte, PT_PTE); } } } - - flush |= (*func)(virt_to_page(pgd_base), PT_PGD); +out: return flush; } @@ -622,14 +719,31 @@ void xen_pgd_pin(pgd_t *pgd) { xen_mc_batch(); - if (pgd_walk(pgd, pin_page, TASK_SIZE)) { + if (pgd_walk(pgd, pin_page, USER_LIMIT)) { /* re-enable interrupts for kmap_flush_unused */ xen_mc_issue(0); kmap_flush_unused(); xen_mc_batch(); } +#ifdef CONFIG_X86_64 + { + pgd_t *user_pgd = xen_get_user_pgd(pgd); + + xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(pgd))); + + if (user_pgd) { + pin_page(virt_to_page(user_pgd), PT_PGD); + xen_do_pin(MMUEXT_PIN_L4_TABLE, PFN_DOWN(__pa(user_pgd))); + } + } +#else /* CONFIG_X86_32 */ +#ifdef CONFIG_X86_PAE + /* Need to make sure unshared kernel PMD is pinnable */ + pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD); +#endif xen_do_pin(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(pgd))); +#endif /* CONFIG_X86_64 */ xen_mc_issue(0); } @@ -656,9 +770,11 @@ void xen_mm_pin_all(void) spin_unlock_irqrestore(&pgd_lock, flags); } -/* The init_mm pagetable is really pinned as soon as its created, but - that's before we have page structures to store the bits. So do all - the book-keeping now. */ +/* + * The init_mm pagetable is really pinned as soon as its created, but + * that's before we have page structures to store the bits. So do all + * the book-keeping now. + */ static __init int mark_pinned(struct page *page, enum pt_level level) { SetPagePinned(page); @@ -708,7 +824,23 @@ static void xen_pgd_unpin(pgd_t *pgd) xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(pgd))); - pgd_walk(pgd, unpin_page, TASK_SIZE); +#ifdef CONFIG_X86_64 + { + pgd_t *user_pgd = xen_get_user_pgd(pgd); + + if (user_pgd) { + xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(user_pgd))); + unpin_page(virt_to_page(user_pgd), PT_PGD); + } + } +#endif + +#ifdef CONFIG_X86_PAE + /* Need to make sure unshared kernel PMD is unpinned */ + pin_page(virt_to_page(pgd_page(pgd[pgd_index(TASK_SIZE)])), PT_PMD); +#endif + + pgd_walk(pgd, unpin_page, USER_LIMIT); xen_mc_issue(0); } @@ -727,7 +859,6 @@ void xen_mm_unpin_all(void) list_for_each_entry(page, &pgd_list, lru) { if (PageSavePinned(page)) { BUG_ON(!PagePinned(page)); - printk("unpinning pinned %p\n", page_address(page)); xen_pgd_unpin((pgd_t *)page_address(page)); ClearPageSavePinned(page); } @@ -757,8 +888,15 @@ void xen_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) static void drop_other_mm_ref(void *info) { struct mm_struct *mm = info; + struct mm_struct *active_mm; + +#ifdef CONFIG_X86_64 + active_mm = read_pda(active_mm); +#else + active_mm = __get_cpu_var(cpu_tlbstate).active_mm; +#endif - if (__get_cpu_var(cpu_tlbstate).active_mm == mm) + if (active_mm == mm) leave_mm(smp_processor_id()); /* If this cpu still has a stale cr3 reference, then make sure diff --git a/arch/x86/xen/mmu.h b/arch/x86/xen/mmu.h index 297bf9f5b8b..0f59bd03f9e 100644 --- a/arch/x86/xen/mmu.h +++ b/arch/x86/xen/mmu.h @@ -10,18 +10,6 @@ enum pt_level { PT_PTE }; -/* - * Page-directory addresses above 4GB do not fit into architectural %cr3. - * When accessing %cr3, or equivalent field in vcpu_guest_context, guests - * must use the following accessor macros to pack/unpack valid MFNs. - * - * Note that Xen is using the fact that the pagetable base is always - * page-aligned, and putting the 12 MSB of the address into the 12 LSB - * of cr3. - */ -#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) -#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) - void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags); @@ -44,13 +32,26 @@ pgd_t xen_make_pgd(pgdval_t); void xen_set_pte(pte_t *ptep, pte_t pteval); void xen_set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval); + +#ifdef CONFIG_X86_PAE void xen_set_pte_atomic(pte_t *ptep, pte_t pte); +void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep); +void xen_pmd_clear(pmd_t *pmdp); +#endif /* CONFIG_X86_PAE */ + void xen_set_pmd(pmd_t *pmdp, pmd_t pmdval); void xen_set_pud(pud_t *ptr, pud_t val); void xen_set_pmd_hyper(pmd_t *pmdp, pmd_t pmdval); void xen_set_pud_hyper(pud_t *ptr, pud_t val); -void xen_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep); -void xen_pmd_clear(pmd_t *pmdp); + +#if PAGETABLE_LEVELS == 4 +pudval_t xen_pud_val(pud_t pud); +pud_t xen_make_pud(pudval_t pudval); +void xen_set_pgd(pgd_t *pgdp, pgd_t pgd); +void xen_set_pgd_hyper(pgd_t *pgdp, pgd_t pgd); +#endif + +pgd_t *xen_get_user_pgd(pgd_t *pgd); pte_t xen_ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, pte_t *ptep); void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, diff --git a/arch/x86/xen/multicalls.c b/arch/x86/xen/multicalls.c index 3c63c4da7ed..9efd1c6c977 100644 --- a/arch/x86/xen/multicalls.c +++ b/arch/x86/xen/multicalls.c @@ -76,6 +76,7 @@ void xen_mc_flush(void) if (ret) { printk(KERN_ERR "%d multicall(s) failed: cpu %d\n", ret, smp_processor_id()); + dump_stack(); for (i = 0; i < b->mcidx; i++) { printk(" call %2d/%d: op=%lu arg=[%lx] result=%ld\n", i+1, b->mcidx, diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index e0a39595bde..b6acc3a0af4 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -83,30 +83,72 @@ static void xen_idle(void) /* * Set the bit indicating "nosegneg" library variants should be used. + * We only need to bother in pure 32-bit mode; compat 32-bit processes + * can have un-truncated segments, so wrapping around is allowed. */ static void __init fiddle_vdso(void) { - extern const char vdso32_default_start; - u32 *mask = VDSO32_SYMBOL(&vdso32_default_start, NOTE_MASK); +#ifdef CONFIG_X86_32 + u32 *mask; + mask = VDSO32_SYMBOL(&vdso32_int80_start, NOTE_MASK); *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; + mask = VDSO32_SYMBOL(&vdso32_sysenter_start, NOTE_MASK); + *mask |= 1 << VDSO_NOTE_NONEGSEG_BIT; +#endif } -void xen_enable_sysenter(void) +static __cpuinit int register_callback(unsigned type, const void *func) { - int cpu = smp_processor_id(); - extern void xen_sysenter_target(void); - /* Mask events on entry, even though they get enabled immediately */ - static struct callback_register sysenter = { - .type = CALLBACKTYPE_sysenter, - .address = { __KERNEL_CS, (unsigned long)xen_sysenter_target }, + struct callback_register callback = { + .type = type, + .address = XEN_CALLBACK(__KERNEL_CS, func), .flags = CALLBACKF_mask_events, }; - if (!boot_cpu_has(X86_FEATURE_SEP) || - HYPERVISOR_callback_op(CALLBACKOP_register, &sysenter) != 0) { - clear_cpu_cap(&cpu_data(cpu), X86_FEATURE_SEP); - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_SEP); + return HYPERVISOR_callback_op(CALLBACKOP_register, &callback); +} + +void __cpuinit xen_enable_sysenter(void) +{ + extern void xen_sysenter_target(void); + int ret; + unsigned sysenter_feature; + +#ifdef CONFIG_X86_32 + sysenter_feature = X86_FEATURE_SEP; +#else + sysenter_feature = X86_FEATURE_SYSENTER32; +#endif + + if (!boot_cpu_has(sysenter_feature)) + return; + + ret = register_callback(CALLBACKTYPE_sysenter, xen_sysenter_target); + if(ret != 0) + setup_clear_cpu_cap(sysenter_feature); +} + +void __cpuinit xen_enable_syscall(void) +{ +#ifdef CONFIG_X86_64 + int ret; + extern void xen_syscall_target(void); + extern void xen_syscall32_target(void); + + ret = register_callback(CALLBACKTYPE_syscall, xen_syscall_target); + if (ret != 0) { + printk(KERN_ERR "Failed to set syscall callback: %d\n", ret); + /* Pretty fatal; 64-bit userspace has no other + mechanism for syscalls. */ } + + if (boot_cpu_has(X86_FEATURE_SYSCALL32)) { + ret = register_callback(CALLBACKTYPE_syscall32, + xen_syscall32_target); + if (ret != 0) + setup_clear_cpu_cap(X86_FEATURE_SYSCALL32); + } +#endif /* CONFIG_X86_64 */ } void __init xen_arch_setup(void) @@ -120,10 +162,12 @@ void __init xen_arch_setup(void) if (!xen_feature(XENFEAT_auto_translated_physmap)) HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3); - HYPERVISOR_set_callbacks(__KERNEL_CS, (unsigned long)xen_hypervisor_callback, - __KERNEL_CS, (unsigned long)xen_failsafe_callback); + if (register_callback(CALLBACKTYPE_event, xen_hypervisor_callback) || + register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback)) + BUG(); xen_enable_sysenter(); + xen_enable_syscall(); set_iopl.iopl = 1; rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl); @@ -143,11 +187,6 @@ void __init xen_arch_setup(void) pm_idle = xen_idle; -#ifdef CONFIG_SMP - /* fill cpus_possible with all available cpus */ - xen_fill_possible_map(); -#endif - paravirt_disable_iospace(); fiddle_vdso(); diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 233156f39b7..f702199312a 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -66,13 +66,22 @@ static __cpuinit void cpu_bringup_and_idle(void) int cpu = smp_processor_id(); cpu_init(); + preempt_disable(); + xen_enable_sysenter(); + xen_enable_syscall(); - preempt_disable(); - per_cpu(cpu_state, cpu) = CPU_ONLINE; + cpu = smp_processor_id(); + smp_store_cpu_info(cpu); + cpu_data(cpu).x86_max_cores = 1; + set_cpu_sibling_map(cpu); xen_setup_cpu_clockevents(); + cpu_set(cpu, cpu_online_map); + x86_write_percpu(cpu_state, CPU_ONLINE); + wmb(); + /* We can take interrupts now: we're officially "up". */ local_irq_enable(); @@ -141,56 +150,37 @@ static int xen_smp_intr_init(unsigned int cpu) return rc; } -void __init xen_fill_possible_map(void) +static void __init xen_fill_possible_map(void) { int i, rc; for (i = 0; i < NR_CPUS; i++) { rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL); - if (rc >= 0) + if (rc >= 0) { + num_processors++; cpu_set(i, cpu_possible_map); + } } } -void __init xen_smp_prepare_boot_cpu(void) +static void __init xen_smp_prepare_boot_cpu(void) { - int cpu; - BUG_ON(smp_processor_id() != 0); native_smp_prepare_boot_cpu(); /* We've switched to the "real" per-cpu gdt, so make sure the old memory can be recycled */ - make_lowmem_page_readwrite(&per_cpu__gdt_page); - - for_each_possible_cpu(cpu) { - cpus_clear(per_cpu(cpu_sibling_map, cpu)); - /* - * cpu_core_map lives in a per cpu area that is cleared - * when the per cpu array is allocated. - * - * cpus_clear(per_cpu(cpu_core_map, cpu)); - */ - } + make_lowmem_page_readwrite(&per_cpu_var(gdt_page)); xen_setup_vcpu_info_placement(); } -void __init xen_smp_prepare_cpus(unsigned int max_cpus) +static void __init xen_smp_prepare_cpus(unsigned int max_cpus) { unsigned cpu; - for_each_possible_cpu(cpu) { - cpus_clear(per_cpu(cpu_sibling_map, cpu)); - /* - * cpu_core_ map will be zeroed when the per - * cpu area is allocated. - * - * cpus_clear(per_cpu(cpu_core_map, cpu)); - */ - } - smp_store_cpu_info(0); + cpu_data(0).x86_max_cores = 1; set_cpu_sibling_map(0); if (xen_smp_intr_init(0)) @@ -225,7 +215,7 @@ static __cpuinit int cpu_initialize_context(unsigned int cpu, struct task_struct *idle) { struct vcpu_guest_context *ctxt; - struct gdt_page *gdt = &per_cpu(gdt_page, cpu); + struct desc_struct *gdt; if (cpu_test_and_set(cpu, xen_cpu_initialized_map)) return 0; @@ -234,12 +224,15 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) if (ctxt == NULL) return -ENOMEM; + gdt = get_cpu_gdt_table(cpu); + ctxt->flags = VGCF_IN_KERNEL; ctxt->user_regs.ds = __USER_DS; ctxt->user_regs.es = __USER_DS; - ctxt->user_regs.fs = __KERNEL_PERCPU; - ctxt->user_regs.gs = 0; ctxt->user_regs.ss = __KERNEL_DS; +#ifdef CONFIG_X86_32 + ctxt->user_regs.fs = __KERNEL_PERCPU; +#endif ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle; ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */ @@ -249,11 +242,11 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) ctxt->ldt_ents = 0; - BUG_ON((unsigned long)gdt->gdt & ~PAGE_MASK); - make_lowmem_page_readonly(gdt->gdt); + BUG_ON((unsigned long)gdt & ~PAGE_MASK); + make_lowmem_page_readonly(gdt); - ctxt->gdt_frames[0] = virt_to_mfn(gdt->gdt); - ctxt->gdt_ents = ARRAY_SIZE(gdt->gdt); + ctxt->gdt_frames[0] = virt_to_mfn(gdt); + ctxt->gdt_ents = GDT_ENTRIES; ctxt->user_regs.cs = __KERNEL_CS; ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs); @@ -261,9 +254,11 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) ctxt->kernel_ss = __KERNEL_DS; ctxt->kernel_sp = idle->thread.sp0; +#ifdef CONFIG_X86_32 ctxt->event_callback_cs = __KERNEL_CS; - ctxt->event_callback_eip = (unsigned long)xen_hypervisor_callback; ctxt->failsafe_callback_cs = __KERNEL_CS; +#endif + ctxt->event_callback_eip = (unsigned long)xen_hypervisor_callback; ctxt->failsafe_callback_eip = (unsigned long)xen_failsafe_callback; per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir); @@ -276,7 +271,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) return 0; } -int __cpuinit xen_cpu_up(unsigned int cpu) +static int __cpuinit xen_cpu_up(unsigned int cpu) { struct task_struct *idle = idle_task(cpu); int rc; @@ -287,11 +282,28 @@ int __cpuinit xen_cpu_up(unsigned int cpu) return rc; #endif +#ifdef CONFIG_X86_64 + /* Allocate node local memory for AP pdas */ + WARN_ON(cpu == 0); + if (cpu > 0) { + rc = get_local_pda(cpu); + if (rc) + return rc; + } +#endif + +#ifdef CONFIG_X86_32 init_gdt(cpu); per_cpu(current_task, cpu) = idle; irq_ctx_init(cpu); +#else + cpu_pda(cpu)->pcurrent = idle; + clear_tsk_thread_flag(idle, TIF_FORK); +#endif xen_setup_timer(cpu); + per_cpu(cpu_state, cpu) = CPU_UP_PREPARE; + /* make sure interrupts start blocked */ per_cpu(xen_vcpu, cpu)->evtchn_upcall_mask = 1; @@ -306,20 +318,18 @@ int __cpuinit xen_cpu_up(unsigned int cpu) if (rc) return rc; - smp_store_cpu_info(cpu); - set_cpu_sibling_map(cpu); - /* This must be done before setting cpu_online_map */ - wmb(); - - cpu_set(cpu, cpu_online_map); - rc = HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL); BUG_ON(rc); + while(per_cpu(cpu_state, cpu) != CPU_ONLINE) { + HYPERVISOR_sched_op(SCHEDOP_yield, 0); + barrier(); + } + return 0; } -void xen_smp_cpus_done(unsigned int max_cpus) +static void xen_smp_cpus_done(unsigned int max_cpus) { } @@ -335,12 +345,12 @@ static void stop_self(void *v) BUG(); } -void xen_smp_send_stop(void) +static void xen_smp_send_stop(void) { smp_call_function(stop_self, NULL, 0); } -void xen_smp_send_reschedule(int cpu) +static void xen_smp_send_reschedule(int cpu) { xen_send_IPI_one(cpu, XEN_RESCHEDULE_VECTOR); } @@ -355,7 +365,7 @@ static void xen_send_IPI_mask(cpumask_t mask, enum ipi_vector vector) xen_send_IPI_one(cpu, vector); } -void xen_smp_send_call_function_ipi(cpumask_t mask) +static void xen_smp_send_call_function_ipi(cpumask_t mask) { int cpu; @@ -370,7 +380,7 @@ void xen_smp_send_call_function_ipi(cpumask_t mask) } } -void xen_smp_send_call_function_single_ipi(int cpu) +static void xen_smp_send_call_function_single_ipi(int cpu) { xen_send_IPI_mask(cpumask_of_cpu(cpu), XEN_CALL_FUNCTION_SINGLE_VECTOR); } @@ -379,7 +389,11 @@ static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id) { irq_enter(); generic_smp_call_function_interrupt(); +#ifdef CONFIG_X86_32 __get_cpu_var(irq_stat).irq_call_count++; +#else + add_pda(irq_call_count, 1); +#endif irq_exit(); return IRQ_HANDLED; @@ -389,8 +403,31 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id) { irq_enter(); generic_smp_call_function_single_interrupt(); +#ifdef CONFIG_X86_32 __get_cpu_var(irq_stat).irq_call_count++; +#else + add_pda(irq_call_count, 1); +#endif irq_exit(); return IRQ_HANDLED; } + +static const struct smp_ops xen_smp_ops __initdata = { + .smp_prepare_boot_cpu = xen_smp_prepare_boot_cpu, + .smp_prepare_cpus = xen_smp_prepare_cpus, + .cpu_up = xen_cpu_up, + .smp_cpus_done = xen_smp_cpus_done, + + .smp_send_stop = xen_smp_send_stop, + .smp_send_reschedule = xen_smp_send_reschedule, + + .send_call_func_ipi = xen_smp_send_call_function_ipi, + .send_call_func_single_ipi = xen_smp_send_call_function_single_ipi, +}; + +void __init xen_smp_init(void) +{ + smp_ops = xen_smp_ops; + xen_fill_possible_map(); +} diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c index 251669a932d..2a234db5949 100644 --- a/arch/x86/xen/suspend.c +++ b/arch/x86/xen/suspend.c @@ -38,8 +38,11 @@ void xen_post_suspend(int suspend_cancelled) xen_cpu_initialized_map = cpu_online_map; #endif xen_vcpu_restore(); - xen_timer_resume(); } } +void xen_arch_resume(void) +{ + /* nothing */ +} diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm_32.S index 2497a30f41d..2497a30f41d 100644 --- a/arch/x86/xen/xen-asm.S +++ b/arch/x86/xen/xen-asm_32.S diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S new file mode 100644 index 00000000000..4038cbfe333 --- /dev/null +++ b/arch/x86/xen/xen-asm_64.S @@ -0,0 +1,271 @@ +/* + Asm versions of Xen pv-ops, suitable for either direct use or inlining. + The inline versions are the same as the direct-use versions, with the + pre- and post-amble chopped off. + + This code is encoded for size rather than absolute efficiency, + with a view to being able to inline as much as possible. + + We only bother with direct forms (ie, vcpu in pda) of the operations + here; the indirect forms are better handled in C, since they're + generally too large to inline anyway. + */ + +#include <linux/linkage.h> + +#include <asm/asm-offsets.h> +#include <asm/processor-flags.h> +#include <asm/errno.h> +#include <asm/segment.h> + +#include <xen/interface/xen.h> + +#define RELOC(x, v) .globl x##_reloc; x##_reloc=v +#define ENDPATCH(x) .globl x##_end; x##_end=. + +/* Pseudo-flag used for virtual NMI, which we don't implement yet */ +#define XEN_EFLAGS_NMI 0x80000000 + +#if 0 +#include <asm/percpu.h> + +/* + Enable events. This clears the event mask and tests the pending + event status with one and operation. If there are pending + events, then enter the hypervisor to get them handled. + */ +ENTRY(xen_irq_enable_direct) + /* Unmask events */ + movb $0, PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_mask) + + /* Preempt here doesn't matter because that will deal with + any pending interrupts. The pending check may end up being + run on the wrong CPU, but that doesn't hurt. */ + + /* Test for pending */ + testb $0xff, PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_pending) + jz 1f + +2: call check_events +1: +ENDPATCH(xen_irq_enable_direct) + ret + ENDPROC(xen_irq_enable_direct) + RELOC(xen_irq_enable_direct, 2b+1) + +/* + Disabling events is simply a matter of making the event mask + non-zero. + */ +ENTRY(xen_irq_disable_direct) + movb $1, PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_mask) +ENDPATCH(xen_irq_disable_direct) + ret + ENDPROC(xen_irq_disable_direct) + RELOC(xen_irq_disable_direct, 0) + +/* + (xen_)save_fl is used to get the current interrupt enable status. + Callers expect the status to be in X86_EFLAGS_IF, and other bits + may be set in the return value. We take advantage of this by + making sure that X86_EFLAGS_IF has the right value (and other bits + in that byte are 0), but other bits in the return value are + undefined. We need to toggle the state of the bit, because + Xen and x86 use opposite senses (mask vs enable). + */ +ENTRY(xen_save_fl_direct) + testb $0xff, PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_mask) + setz %ah + addb %ah,%ah +ENDPATCH(xen_save_fl_direct) + ret + ENDPROC(xen_save_fl_direct) + RELOC(xen_save_fl_direct, 0) + +/* + In principle the caller should be passing us a value return + from xen_save_fl_direct, but for robustness sake we test only + the X86_EFLAGS_IF flag rather than the whole byte. After + setting the interrupt mask state, it checks for unmasked + pending events and enters the hypervisor to get them delivered + if so. + */ +ENTRY(xen_restore_fl_direct) + testb $X86_EFLAGS_IF>>8, %ah + setz PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_mask) + /* Preempt here doesn't matter because that will deal with + any pending interrupts. The pending check may end up being + run on the wrong CPU, but that doesn't hurt. */ + + /* check for unmasked and pending */ + cmpw $0x0001, PER_CPU_VAR(xen_vcpu_info, XEN_vcpu_info_pending) + jz 1f +2: call check_events +1: +ENDPATCH(xen_restore_fl_direct) + ret + ENDPROC(xen_restore_fl_direct) + RELOC(xen_restore_fl_direct, 2b+1) + + +/* + Force an event check by making a hypercall, + but preserve regs before making the call. + */ +check_events: + push %rax + push %rcx + push %rdx + push %rsi + push %rdi + push %r8 + push %r9 + push %r10 + push %r11 + call force_evtchn_callback + pop %r11 + pop %r10 + pop %r9 + pop %r8 + pop %rdi + pop %rsi + pop %rdx + pop %rcx + pop %rax + ret +#endif + +ENTRY(xen_adjust_exception_frame) + mov 8+0(%rsp),%rcx + mov 8+8(%rsp),%r11 + ret $16 + +hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32 +/* + Xen64 iret frame: + + ss + rsp + rflags + cs + rip <-- standard iret frame + + flags + + rcx } + r11 }<-- pushed by hypercall page +rsp -> rax } + */ +ENTRY(xen_iret) + pushq $0 +1: jmp hypercall_iret +ENDPATCH(xen_iret) +RELOC(xen_iret, 1b+1) + +/* + sysexit is not used for 64-bit processes, so it's + only ever used to return to 32-bit compat userspace. + */ +ENTRY(xen_sysexit) + pushq $__USER32_DS + pushq %rcx + pushq $X86_EFLAGS_IF + pushq $__USER32_CS + pushq %rdx + + pushq $VGCF_in_syscall +1: jmp hypercall_iret +ENDPATCH(xen_sysexit) +RELOC(xen_sysexit, 1b+1) + +ENTRY(xen_sysret64) + /* We're already on the usermode stack at this point, but still + with the kernel gs, so we can easily switch back */ + movq %rsp, %gs:pda_oldrsp + movq %gs:pda_kernelstack,%rsp + + pushq $__USER_DS + pushq %gs:pda_oldrsp + pushq %r11 + pushq $__USER_CS + pushq %rcx + + pushq $VGCF_in_syscall +1: jmp hypercall_iret +ENDPATCH(xen_sysret64) +RELOC(xen_sysret64, 1b+1) + +ENTRY(xen_sysret32) + /* We're already on the usermode stack at this point, but still + with the kernel gs, so we can easily switch back */ + movq %rsp, %gs:pda_oldrsp + movq %gs:pda_kernelstack, %rsp + + pushq $__USER32_DS + pushq %gs:pda_oldrsp + pushq %r11 + pushq $__USER32_CS + pushq %rcx + + pushq $VGCF_in_syscall +1: jmp hypercall_iret +ENDPATCH(xen_sysret32) +RELOC(xen_sysret32, 1b+1) + +/* + Xen handles syscall callbacks much like ordinary exceptions, + which means we have: + - kernel gs + - kernel rsp + - an iret-like stack frame on the stack (including rcx and r11): + ss + rsp + rflags + cs + rip + r11 + rsp-> rcx + + In all the entrypoints, we undo all that to make it look + like a CPU-generated syscall/sysenter and jump to the normal + entrypoint. + */ + +.macro undo_xen_syscall + mov 0*8(%rsp),%rcx + mov 1*8(%rsp),%r11 + mov 5*8(%rsp),%rsp +.endm + +/* Normal 64-bit system call target */ +ENTRY(xen_syscall_target) + undo_xen_syscall + jmp system_call_after_swapgs +ENDPROC(xen_syscall_target) + +#ifdef CONFIG_IA32_EMULATION + +/* 32-bit compat syscall target */ +ENTRY(xen_syscall32_target) + undo_xen_syscall + jmp ia32_cstar_target +ENDPROC(xen_syscall32_target) + +/* 32-bit compat sysenter target */ +ENTRY(xen_sysenter_target) + undo_xen_syscall + jmp ia32_sysenter_target +ENDPROC(xen_sysenter_target) + +#else /* !CONFIG_IA32_EMULATION */ + +ENTRY(xen_syscall32_target) +ENTRY(xen_sysenter_target) + lea 16(%rsp), %rsp /* strip %rcx,%r11 */ + mov $-ENOSYS, %rax + pushq $VGCF_in_syscall + jmp hypercall_iret +ENDPROC(xen_syscall32_target) +ENDPROC(xen_sysenter_target) + +#endif /* CONFIG_IA32_EMULATION */ diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S index 7c0cf6320a0..63d49a523ed 100644 --- a/arch/x86/xen/xen-head.S +++ b/arch/x86/xen/xen-head.S @@ -5,15 +5,24 @@ #include <linux/elfnote.h> #include <linux/init.h> + #include <asm/boot.h> +#include <asm/asm.h> +#include <asm/page.h> + #include <xen/interface/elfnote.h> #include <asm/xen/interface.h> __INIT ENTRY(startup_xen) - movl %esi,xen_start_info cld - movl $(init_thread_union+THREAD_SIZE),%esp +#ifdef CONFIG_X86_32 + mov %esi,xen_start_info + mov $init_thread_union+THREAD_SIZE,%esp +#else + mov %rsi,xen_start_info + mov $init_thread_union+THREAD_SIZE,%rsp +#endif jmp xen_start_kernel __FINIT @@ -21,21 +30,26 @@ ENTRY(startup_xen) .pushsection .text .align PAGE_SIZE_asm ENTRY(hypercall_page) - .skip 0x1000 + .skip PAGE_SIZE_asm .popsection ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") - ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long __PAGE_OFFSET) - ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long startup_xen) - ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long hypercall_page) +#ifdef CONFIG_X86_32 + ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) +#else + ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) +#endif + ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) + ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz "!writable_page_tables|pae_pgdir_above_4gb") ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) - ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .long __HYPERVISOR_VIRT_START) + ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) + ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) #endif /*CONFIG_XEN */ diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 6f4b1045c1c..dd3c23152a2 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -26,6 +26,7 @@ char * __init xen_memory_setup(void); void __init xen_arch_setup(void); void __init xen_init_IRQ(void); void xen_enable_sysenter(void); +void xen_enable_syscall(void); void xen_vcpu_restore(void); void __init xen_build_dynamic_phys_to_machine(void); @@ -37,7 +38,6 @@ void __init xen_time_init(void); unsigned long xen_get_wallclock(void); int xen_set_wallclock(unsigned long time); unsigned long long xen_sched_clock(void); -void xen_timer_resume(void); irqreturn_t xen_debug_interrupt(int irq, void *dev_id); @@ -45,20 +45,15 @@ bool xen_vcpu_stolen(int vcpu); void xen_mark_init_mm_pinned(void); -void __init xen_fill_possible_map(void); - void __init xen_setup_vcpu_info_placement(void); -void xen_smp_prepare_boot_cpu(void); -void xen_smp_prepare_cpus(unsigned int max_cpus); -int xen_cpu_up(unsigned int cpu); -void xen_smp_cpus_done(unsigned int max_cpus); -void xen_smp_send_stop(void); -void xen_smp_send_reschedule(int cpu); -void xen_smp_send_call_function_ipi(cpumask_t mask); -void xen_smp_send_call_function_single_ipi(int cpu); +#ifdef CONFIG_SMP +void xen_smp_init(void); extern cpumask_t xen_cpu_initialized_map; +#else +static inline void xen_smp_init(void) {} +#endif /* Declare an asm function, along with symbols needed to make it @@ -73,7 +68,11 @@ DECL_ASM(void, xen_irq_disable_direct, void); DECL_ASM(unsigned long, xen_save_fl_direct, void); DECL_ASM(void, xen_restore_fl_direct, unsigned long); +/* These are not functions, and cannot be called normally */ void xen_iret(void); void xen_sysexit(void); +void xen_sysret32(void); +void xen_sysret64(void); +void xen_adjust_exception_frame(void); #endif /* XEN_OPS_H */ |