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2008-07-05i.MXC family: Adding timer supportJuergen Beisert
This patch adds timer support for the i.MX machine family. This code can be used on the following machs: - i.MX1 (tested) - i.MX2 (i.MX21 (to be tested), i.MX27 (tested)) - i.MX3 (i.MX31 (tested)) TODO: It seems impossible to build a kernel for more than one CPU because the timer do not follow the platform device rules. So it does only work if timer 1 can be accessed on all CPUs at the same address. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05MXC: add io multiplexing functions for mx3Sascha Hauer
This patch adds functions to use the io multiplexer on mx3 platforms. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05MXC arch: Add gpio support for the whole platformJuergen Beisert
This patch bases on the one from Daniel Mack. The most important change to Daniel's patch is to be more generic. This gpio routine supports at least the i.MX27 and i.MX31 processors. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Acked-by: Daniel Mack <daniel@caiaq.de>
2008-07-05mxc: add MX3 support for i.MX internal UART driverSascha Hauer
This patch adds MX3 support for the i.MX internal uart driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05i.MX3: introduce clock APISascha Hauer
This patch introduces the clock API for for arch-mxc Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05MXC family: Add clock handlingJuergen Beisert
Internal clock path handling for the mxc CPUs. Changed against the original Freescale code (and against clocklib for example): - clock rate is always calculated whenever one ask for the current rate (means struct clk has no more a member called "rate"). So switching the PLL base frequency will propagate immediately to all other clocks that are depending on this frequency. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
2008-07-05IMX: introduce clock APISascha Hauer
This patch introduces the clock API for i.MX and converts all in-Kernel drivers to use it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05IMX UART: remove statically initialized tablesSascha Hauer
This patch removes the statically initialized tables from the i.MX serial driver and makes the driver fully dependent on the information provided by the platform_device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-05MXC: do not include board specific header from architecture includeSascha Hauer
do not include board-mx31ads.h from hardware.h, instead include it directly only where needed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2008-07-03[MIPS] cevt-txx9: Reset timer counter on initializationAtsushi Nemoto
The txx9_tmr_init() will not clear a timer counter register in a certain case. The counter register is cleared on 1->0 transition of TCE bit if CRE=1. So just clearing the TCE bit is not enough. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-07-03[MIPS] IP22: Fix crashes due to wrong L1_CACHE_BYTESThomas Bogendoerfer
The introduction of a real dma cache invalidate makes it important to have a correct cache line size, otherwise the kernel will gives out two memory segment, which might share one cache line. The R4400 Indy/Indigo2 CPU modules are using a second level cache line size of 128 bytes, so MIPS_L1_CACHE_SHIFT needs to be bumped up to 7 for IP22. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-07-03[MIPS] IP32: Fix unexpected irq 71Thomas Bogendoerfer
It's possible that the crime interrupt handler is called without pending interrupts (probably a hardware issue). To avoid irritating "unexpected irq 71" messages, we now just ignore the spurious crime interrupts. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-07-02Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] export account_system_vtime [IA64] Bugfix for system with 32 cpus
2008-07-02Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5131/1: Annotate platform_secondary_init with trace_hardirqs_off [ARM] 5117/1: pxafb: fix __devinit/exit annotations [ARM] Export dma_sync_sg_for_device() [ARM] 5109/1: Mark rtc sa1100 driver as wakeup source before registering it [ARM] 5116/1: pxafb: cleanup and fix order of failure handling [ARM] 5115/1: pxafb: fix ifdef for command line option handling ARM: OMAP: Correcting the gpmc prefetch control register address ARM: OMAP: DMA: Don't mark channel active in omap_enable_channel_irq
2008-07-02Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix NODES_SHIFT Kconfig range
2008-07-02Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc/mpc5200: Fix lite5200b suspend/resume powerpc/legacy_serial: Bail if reg-offset/shift properties are present powerpc/bootwrapper: update for initrd with simpleImage
2008-07-03Merge branch 'for-2.6.26' of git://git.secretlab.ca/git/linux-2.6-mpc52xx ↵Paul Mackerras
into merge
2008-07-01powerpc/mpc5200: Fix lite5200b suspend/resumeTim Yamin
Suspend/resume ("echo mem > /sys/power/state") does not work with vanilla kernels -- the system does not suspend correctly and just hangs. This patch fixes this so suspend/resume works: 1) of_iomap does not map the whole 0xC000 of the MPC5200 immr so saving registers does not work. 2) PCI registers need to be saved and restored. Signed-off-by: Tim Yamin <plasm@roo.me.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-07-01powerpc/legacy_serial: Bail if reg-offset/shift properties are presentJohn Linn
The legacy serial driver does not work with an 8250 type UART that is described in the device tree with the reg-offset and reg-shift properties. This change makes legacy_serial ignore these devices. Signed-off-by: John Linn <john.linn@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-07-01powerpc/bootwrapper: update for initrd with simpleImageJohn Linn
This change to the makefile corrects the build of a simpleImage with initrd. Signed-off-by: John Linn <john.linn@xilinx> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-07-01x86: fix NODES_SHIFT Kconfig rangeThomas Gleixner
commit 4323838215184f5a2f081e0d17b8d60731b03164 x86: change size of node ids from u8 to s16 set the range for NODES_SHIFT to 1..15. The possible range is 1..9 Fixes Bugzilla #10726 Reported-by: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-06-30[IA64] export account_system_vtimeDoug Chapman
The symbol account_system_vtime is used by the kvm module but not exported. This breaks building with CONFIG_VIRT_CPU_ACCOUNTING and CONFIG_KVM=m. Signed-off-by: Doug Chapman <doug.chapman@hp.com> Acked-by: Hidetosho Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-06-30[IA64] Bugfix for system with 32 cpusTony Luck
On a system where there are no hot pluggable cpus "additional_cpus" is still set to -1 at the point where we call per_cpu_scan_finalize(). If we didn't find an SRAT table and so pick the default "32" for the number of cpus, when we get to: high_cpu = min(high_cpu + reserve_cpus, NR_CPUS); we will end up initializing for just 31 cpus ... and so we will die horribly when bringing up cpu#32. Problem introduced by: 2c6e6db41f01b6b4eb98809350827c9678996698 "Minimize per_cpu reservations." Acked-by: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-06-30[ARM] 5131/1: Annotate platform_secondary_init with trace_hardirqs_offCatalin Marinas
This patch annotates the platform_secondary_init function in arch/arm/mach-realview/platsmp.c with trace_hardirqs_off to avoid a warning when LOCKDEP and TRACE_IRQFLAGS are enabled. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-30Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: ptrace GET/SET FPXREGS broken x86: fix cpu hotplug crash x86: section/warning fixes x86: shift bits the right way in native_read_tscp
2008-06-30ptrace GET/SET FPXREGS brokenTAKADA Yoshihito
When I update kernel 2.6.25 from 2.6.24, gdb does not work. On 2.6.25, ptrace(PTRACE_GETFPXREGS, ...) returns ENODEV. But 2.6.24 kernel's ptrace() returns EIO. It is issue of compatibility. I attached test program as pt.c and patch for fix it. #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <errno.h> #include <sys/ptrace.h> #include <sys/types.h> struct user_fxsr_struct { unsigned short cwd; unsigned short swd; unsigned short twd; unsigned short fop; long fip; long fcs; long foo; long fos; long mxcsr; long reserved; long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ long padding[56]; }; int main(void) { pid_t pid; pid = fork(); switch(pid){ case -1:/* error */ break; case 0:/* child */ child(); break; default: parent(pid); break; } return 0; } int child(void) { ptrace(PTRACE_TRACEME); kill(getpid(), SIGSTOP); sleep(10); return 0; } int parent(pid_t pid) { int ret; struct user_fxsr_struct fpxregs; ret = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpxregs); if(ret < 0){ printf("%d: %s.\n", errno, strerror(errno)); } kill(pid, SIGCONT); wait(pid); return 0; } /* in the kerel, at kernel/i387.c get_fpxregs() */ Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30x86: fix cpu hotplug crashZhang, Yanmin
Vegard Nossum reported crashes during cpu hotplug tests: http://marc.info/?l=linux-kernel&m=121413950227884&w=4 In function _cpu_up, the panic happens when calling __raw_notifier_call_chain at the second time. Kernel doesn't panic when calling it at the first time. If just say because of nr_cpu_ids, that's not right. By checking the source code, I found that function do_boot_cpu is the culprit. Consider below call chain: _cpu_up=>__cpu_up=>smp_ops.cpu_up=>native_cpu_up=>do_boot_cpu. So do_boot_cpu is called in the end. In do_boot_cpu, if boot_error==true, cpu_clear(cpu, cpu_possible_map) is executed. So later on, when _cpu_up calls __raw_notifier_call_chain at the second time to report CPU_UP_CANCELED, because this cpu is already cleared from cpu_possible_map, get_cpu_sysdev returns NULL. Many resources are related to cpu_possible_map, so it's better not to change it. Below patch against 2.6.26-rc7 fixes it by removing the bit clearing in cpu_possible_map. Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com> Tested-by: Vegard Nossum <vegard.nossum@gmail.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-26x86: section/warning fixesDaniel J Blueman
WARNING: arch/x86/mm/built-in.o(.text+0x3a1): Section mismatch in reference from the function set_pte_phys() to the function .init.text:spp_getpage() The function set_pte_phys() references the function __init spp_getpage(). This is often because set_pte_phys lacks a __init annotation or the annotation of spp_getpage is wrong. arch/x86/mm/init_64.c: In function 'early_memtest': arch/x86/mm/init_64.c:520: warning: passing argument 2 of 'find_e820_area_size' from incompatible pointer type Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com> Cc: "Linus Torvalds" <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-25Blackfin arch: fix up section mismatch warningBryan Wu
-- WARNING: vmlinux.o(.text+0x721a): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7238): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7250): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x7264): Section mismatch in reference from the function ___fill_code_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_code_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_code_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72a2): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72bc): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72d4): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. WARNING: vmlinux.o(.text+0x72e8): Section mismatch in reference from the function ___fill_data_cplbtab() to the function .init.text:_fill_cplbtab() The function ___fill_data_cplbtab() references the function __init _fill_cplbtab(). This is often because ___fill_data_cplbtab lacks a __init annotation or the annotation of _fill_cplbtab is wrong. -- Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-06-25Blackfin arch: fix bug - kernel boot fails when Spinlock and rw-lock ↵Sonic Zhang
debugging enabled Initialize the lock of bad_irq_desc properly. The content of irq_desc array is replaced by bad_irq_desc in blackfin arch irqchip init code. So, do it properly as common irq init code. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-06-24Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Eliminate NULL test after alloc_bootmem in iosapic_alloc_rte() [IA64] Handle count==0 in sn2_ptc_proc_write() [IA64] Fix boot failure on ia64/sn2
2008-06-24Merge branch 'kvm-updates-2.6.26' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: Remove now unused structs from kvm_para.h x86: KVM guest: Use the paravirt clocksource structs and functions KVM: Make kvm host use the paravirt clocksource structs x86: Make xen use the paravirt clocksource structs and functions x86: Add structs and functions for paravirt clocksource KVM: VMX: Fix host msr corruption with preemption enabled KVM: ioapic: fix lost interrupt when changing a device's irq KVM: MMU: Fix oops on guest userspace access to guest pagetable KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend) KVM: MMU: Fix rmap_write_protect() hugepage iteration bug KVM: close timer injection race window in __vcpu_run KVM: Fix race between timer migration and vcpu migration
2008-06-24Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: xen: remove support for non-PAE 32-bit
2008-06-24x86: KVM guest: Use the paravirt clocksource structs and functionsGerd Hoffmann
This patch updates the kvm host code to use the pvclock structs and functions, thereby making it compatible with Xen. The patch also fixes an initialization bug: on SMP systems the per-cpu has two different locations early at boot and after CPU bringup. kvmclock must take that in account when registering the physical address within the host. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: Make kvm host use the paravirt clocksource structsGerd Hoffmann
This patch updates the kvm host code to use the pvclock structs. It also makes the paravirt clock compatible with Xen. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24x86: Make xen use the paravirt clocksource structs and functionsGerd Hoffmann
This patch updates the xen guest to use the pvclock structs and helper functions. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24x86: Add structs and functions for paravirt clocksourceGerd Hoffmann
This patch adds structs for the paravirt clocksource ABI used by both xen and kvm (pvclock-abi.h). It also adds some helper functions to read system time and wall clock time from a paravirtual clocksource (pvclock.[ch]). They are based on the xen code. They are enabled using CONFIG_PARAVIRT_CLOCK. Subsequent patches of this series will put the code in use. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24[IA64] Eliminate NULL test after alloc_bootmem in iosapic_alloc_rte()Julia Lawall
As noted by Akinobu Mita alloc_bootmem and related functions never return NULL and always return a zeroed region of memory. Thus a NULL test or memset after calls to these functions is unnecessary. Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-06-24[IA64] Handle count==0 in sn2_ptc_proc_write()Cliff Wickman
The fix applied in e0c6d97c65e0784aade7e97b9411f245a6c543e7 "security hole in sn2_ptc_proc_write" didn't take into account the case where count==0 (which results in a buffer underrun when adding the trailing '\0'). Thanks to Andi Kleen for pointing this out. Signed-off-by: Cliff Wickman <cpw@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-06-24[IA64] Fix boot failure on ia64/sn2Jes Sorensen
Call check_sal_cache_flush() after platform_setup() as check_sal_cache_flush() now relies on being able to call platform vector code. Problem was introduced by: 3463a93def55c309f3c0d0a8aaf216be3be42d64 "Update check_sal_cache_flush to use platform_send_ipi()" Signed-off-by: Jes Sorensen <jes@sgi.com> Tested-by: Alex Chiang: <achiang@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-06-24xen: remove support for non-PAE 32-bitJeremy Fitzhardinge
Non-PAE operation has been deprecated in Xen for a while, and is rarely tested or used. xen-unstable has now officially dropped non-PAE support. Since Xen/pvops' non-PAE support has also been broken for a while, we may as well completely drop it altogether. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-24KVM: VMX: Fix host msr corruption with preemption enabledAvi Kivity
Switching msrs can occur either synchronously as a result of calls to the msr management functions (usually in response to the guest touching virtualized msrs), or asynchronously when preempting a kvm thread that has guest state loaded. If we're unlucky enough to have the two at the same time, host msrs are corrupted and the machine goes kaput on the next syscall. Most easily triggered by Windows Server 2008, as it does a lot of msr switching during bootup. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: MMU: Fix oops on guest userspace access to guest pagetableAvi Kivity
KVM has a heuristic to unshadow guest pagetables when userspace accesses them, on the assumption that most guests do not allow userspace to access pagetables directly. Unfortunately, in addition to unshadowing the pagetables, it also oopses. This never triggers on ordinary guests since sane OSes will clear the pagetables before assigning them to userspace, which will trigger the flood heuristic, unshadowing the pagetables before the first userspace access. One particular guest, though (Xenner) will run the kernel in userspace, triggering the oops. Since the heuristic is incorrect in this case, we can simply remove it. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend)Marcelo Tosatti
kvm_mmu_pte_write() does not handle 32-bit non-PAE large page backed guests properly. It will instantiate two 2MB sptes pointing to the same physical 2MB page when a guest large pte update is trapped. Instead of duplicating code to handle this, disallow directory level updates to happen through kvm_mmu_pte_write(), so the two 2MB sptes emulating one guest 4MB pte can be correctly created by the page fault handling path. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: MMU: Fix rmap_write_protect() hugepage iteration bugMarcelo Tosatti
rmap_next() does not work correctly after rmap_remove(), as it expects the rmap chains not to change during iteration. Fix (for now) by restarting iteration from the beginning. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: close timer injection race window in __vcpu_runMarcelo Tosatti
If a timer fires after kvm_inject_pending_timer_irqs() but before local_irq_disable() the code will enter guest mode and only inject such timer interrupt the next time an unrelated event causes an exit. It would be simpler if the timer->pending irq conversion could be done with IRQ's disabled, so that the above problem cannot happen. For now introduce a new vcpu requests bit to cancel guest entry. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24KVM: Fix race between timer migration and vcpu migrationMarcelo Tosatti
A guest vcpu instance can be scheduled to a different physical CPU between the test for KVM_REQ_MIGRATE_TIMER and local_irq_disable(). If that happens, the timer will only be migrated to the current pCPU on the next exit, meaning that guest LAPIC timer event can be delayed until a host interrupt is triggered. Fix it by cancelling guest entry if any vcpu request is pending. This has the side effect of nicely consolidating vcpu->requests checks. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-23Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: xen: don't drop NX bit xen: mask unwanted pte bits in __supported_pte_mask xen: Use wmb instead of rmb in xen_evtchn_do_upcall(). x86: fix NULL pointer deref in __switch_to
2008-06-22[ARM] Export dma_sync_sg_for_device()Russell King
Noticed by Martin Michlmayr, this missing export prevents IEEE1394 from building with: ERROR: "dma_sync_sg_for_device" [drivers/ieee1394/ieee1394.ko] undefined! Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-22Merge branch 'omap-fixes' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6