diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
commit | 8c82a17e9c924c0e9f13e75e4c2f6bca19a4b516 (patch) | |
tree | d535f46a917e14e90deccb29ad00aac016ad18dd /include/asm-x86/paravirt.h | |
parent | 4ce72a2c063a7fa8e42a9435440ae3364115a58d (diff) | |
parent | 57f8f7b60db6f1ed2c6918ab9230c4623a9dbe37 (diff) |
Merge commit 'v2.6.28-rc1' into sched/urgent
Diffstat (limited to 'include/asm-x86/paravirt.h')
-rw-r--r-- | include/asm-x86/paravirt.h | 1650 |
1 files changed, 0 insertions, 1650 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h deleted file mode 100644 index 8d6ae2f760d..00000000000 --- a/include/asm-x86/paravirt.h +++ /dev/null @@ -1,1650 +0,0 @@ -#ifndef ASM_X86__PARAVIRT_H -#define ASM_X86__PARAVIRT_H -/* Various instructions on x86 need to be replaced for - * para-virtualization: those hooks are defined here. */ - -#ifdef CONFIG_PARAVIRT -#include <asm/page.h> -#include <asm/asm.h> - -/* Bitmask of what can be clobbered: usually at least eax. */ -#define CLBR_NONE 0 -#define CLBR_EAX (1 << 0) -#define CLBR_ECX (1 << 1) -#define CLBR_EDX (1 << 2) - -#ifdef CONFIG_X86_64 -#define CLBR_RSI (1 << 3) -#define CLBR_RDI (1 << 4) -#define CLBR_R8 (1 << 5) -#define CLBR_R9 (1 << 6) -#define CLBR_R10 (1 << 7) -#define CLBR_R11 (1 << 8) -#define CLBR_ANY ((1 << 9) - 1) -#include <asm/desc_defs.h> -#else -/* CLBR_ANY should match all regs platform has. For i386, that's just it */ -#define CLBR_ANY ((1 << 3) - 1) -#endif /* X86_64 */ - -#ifndef __ASSEMBLY__ -#include <linux/types.h> -#include <linux/cpumask.h> -#include <asm/kmap_types.h> -#include <asm/desc_defs.h> - -struct page; -struct thread_struct; -struct desc_ptr; -struct tss_struct; -struct mm_struct; -struct desc_struct; - -/* general info */ -struct pv_info { - unsigned int kernel_rpl; - int shared_kernel_pmd; - int paravirt_enabled; - const char *name; -}; - -struct pv_init_ops { - /* - * Patch may replace one of the defined code sequences with - * arbitrary code, subject to the same register constraints. - * This generally means the code is not free to clobber any - * registers other than EAX. The patch function should return - * the number of bytes of code generated, as we nop pad the - * rest in generic code. - */ - unsigned (*patch)(u8 type, u16 clobber, void *insnbuf, - unsigned long addr, unsigned len); - - /* Basic arch-specific setup */ - void (*arch_setup)(void); - char *(*memory_setup)(void); - void (*post_allocator_init)(void); - - /* Print a banner to identify the environment */ - void (*banner)(void); -}; - - -struct pv_lazy_ops { - /* Set deferred update mode, used for batching operations. */ - void (*enter)(void); - void (*leave)(void); -}; - -struct pv_time_ops { - void (*time_init)(void); - - /* Set and set time of day */ - unsigned long (*get_wallclock)(void); - int (*set_wallclock)(unsigned long); - - unsigned long long (*sched_clock)(void); - unsigned long (*get_tsc_khz)(void); -}; - -struct pv_cpu_ops { - /* hooks for various privileged instructions */ - unsigned long (*get_debugreg)(int regno); - void (*set_debugreg)(int regno, unsigned long value); - - void (*clts)(void); - - unsigned long (*read_cr0)(void); - void (*write_cr0)(unsigned long); - - unsigned long (*read_cr4_safe)(void); - unsigned long (*read_cr4)(void); - void (*write_cr4)(unsigned long); - -#ifdef CONFIG_X86_64 - unsigned long (*read_cr8)(void); - void (*write_cr8)(unsigned long); -#endif - - /* Segment descriptor handling */ - void (*load_tr_desc)(void); - void (*load_gdt)(const struct desc_ptr *); - void (*load_idt)(const struct desc_ptr *); - void (*store_gdt)(struct desc_ptr *); - void (*store_idt)(struct desc_ptr *); - void (*set_ldt)(const void *desc, unsigned entries); - unsigned long (*store_tr)(void); - void (*load_tls)(struct thread_struct *t, unsigned int cpu); -#ifdef CONFIG_X86_64 - void (*load_gs_index)(unsigned int idx); -#endif - void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, - const void *desc); - void (*write_gdt_entry)(struct desc_struct *, - int entrynum, const void *desc, int size); - void (*write_idt_entry)(gate_desc *, - int entrynum, const gate_desc *gate); - void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); - void (*free_ldt)(struct desc_struct *ldt, unsigned entries); - - void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t); - - void (*set_iopl_mask)(unsigned mask); - - void (*wbinvd)(void); - void (*io_delay)(void); - - /* cpuid emulation, mostly so that caps bits can be disabled */ - void (*cpuid)(unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx); - - /* MSR, PMC and TSR operations. - err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ - u64 (*read_msr_amd)(unsigned int msr, int *err); - u64 (*read_msr)(unsigned int msr, int *err); - int (*write_msr)(unsigned int msr, unsigned low, unsigned high); - - u64 (*read_tsc)(void); - u64 (*read_pmc)(int counter); - unsigned long long (*read_tscp)(unsigned int *aux); - - /* - * Atomically enable interrupts and return to userspace. This - * is only ever used to return to 32-bit processes; in a - * 64-bit kernel, it's used for 32-on-64 compat processes, but - * never native 64-bit processes. (Jump, not call.) - */ - void (*irq_enable_sysexit)(void); - - /* - * Switch to usermode gs and return to 64-bit usermode using - * sysret. Only used in 64-bit kernels to return to 64-bit - * processes. Usermode register state, including %rsp, must - * already be restored. - */ - void (*usergs_sysret64)(void); - - /* - * Switch to usermode gs and return to 32-bit usermode using - * sysret. Used to return to 32-on-64 compat processes. - * Other usermode register state, including %esp, must already - * be restored. - */ - void (*usergs_sysret32)(void); - - /* Normal iret. Jump to this with the standard iret stack - frame set up. */ - void (*iret)(void); - - void (*swapgs)(void); - - struct pv_lazy_ops lazy_mode; -}; - -struct pv_irq_ops { - void (*init_IRQ)(void); - - /* - * Get/set interrupt state. save_fl and restore_fl are only - * expected to use X86_EFLAGS_IF; all other bits - * returned from save_fl are undefined, and may be ignored by - * restore_fl. - */ - unsigned long (*save_fl)(void); - void (*restore_fl)(unsigned long); - void (*irq_disable)(void); - void (*irq_enable)(void); - void (*safe_halt)(void); - void (*halt)(void); - -#ifdef CONFIG_X86_64 - void (*adjust_exception_frame)(void); -#endif -}; - -struct pv_apic_ops { -#ifdef CONFIG_X86_LOCAL_APIC - void (*setup_boot_clock)(void); - void (*setup_secondary_clock)(void); - - void (*startup_ipi_hook)(int phys_apicid, - unsigned long start_eip, - unsigned long start_esp); -#endif -}; - -struct pv_mmu_ops { - /* - * Called before/after init_mm pagetable setup. setup_start - * may reset %cr3, and may pre-install parts of the pagetable; - * pagetable setup is expected to preserve any existing - * mapping. - */ - void (*pagetable_setup_start)(pgd_t *pgd_base); - void (*pagetable_setup_done)(pgd_t *pgd_base); - - unsigned long (*read_cr2)(void); - void (*write_cr2)(unsigned long); - - unsigned long (*read_cr3)(void); - void (*write_cr3)(unsigned long); - - /* - * Hooks for intercepting the creation/use/destruction of an - * mm_struct. - */ - void (*activate_mm)(struct mm_struct *prev, - struct mm_struct *next); - void (*dup_mmap)(struct mm_struct *oldmm, - struct mm_struct *mm); - void (*exit_mmap)(struct mm_struct *mm); - - - /* TLB operations */ - void (*flush_tlb_user)(void); - void (*flush_tlb_kernel)(void); - void (*flush_tlb_single)(unsigned long addr); - void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm, - unsigned long va); - - /* Hooks for allocating and freeing a pagetable top-level */ - int (*pgd_alloc)(struct mm_struct *mm); - void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); - - /* - * Hooks for allocating/releasing pagetable pages when they're - * attached to a pagetable - */ - void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); - void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); - void (*alloc_pmd_clone)(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count); - void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); - void (*release_pte)(unsigned long pfn); - void (*release_pmd)(unsigned long pfn); - void (*release_pud)(unsigned long pfn); - - /* Pagetable manipulation functions */ - void (*set_pte)(pte_t *ptep, pte_t pteval); - void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pteval); - void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); - void (*pte_update)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep); - void (*pte_update_defer)(struct mm_struct *mm, - unsigned long addr, pte_t *ptep); - - pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep); - void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte); - - pteval_t (*pte_val)(pte_t); - pteval_t (*pte_flags)(pte_t); - pte_t (*make_pte)(pteval_t pte); - - pgdval_t (*pgd_val)(pgd_t); - pgd_t (*make_pgd)(pgdval_t pgd); - -#if PAGETABLE_LEVELS >= 3 -#ifdef CONFIG_X86_PAE - void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); - void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte); - void (*pte_clear)(struct mm_struct *mm, unsigned long addr, - pte_t *ptep); - void (*pmd_clear)(pmd_t *pmdp); - -#endif /* CONFIG_X86_PAE */ - - void (*set_pud)(pud_t *pudp, pud_t pudval); - - pmdval_t (*pmd_val)(pmd_t); - pmd_t (*make_pmd)(pmdval_t pmd); - -#if PAGETABLE_LEVELS == 4 - pudval_t (*pud_val)(pud_t); - pud_t (*make_pud)(pudval_t pud); - - void (*set_pgd)(pgd_t *pudp, pgd_t pgdval); -#endif /* PAGETABLE_LEVELS == 4 */ -#endif /* PAGETABLE_LEVELS >= 3 */ - -#ifdef CONFIG_HIGHPTE - void *(*kmap_atomic_pte)(struct page *page, enum km_type type); -#endif - - struct pv_lazy_ops lazy_mode; - - /* dom0 ops */ - - /* Sometimes the physical address is a pfn, and sometimes its - an mfn. We can tell which is which from the index. */ - void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, - unsigned long phys, pgprot_t flags); -}; - -struct raw_spinlock; -struct pv_lock_ops { - int (*spin_is_locked)(struct raw_spinlock *lock); - int (*spin_is_contended)(struct raw_spinlock *lock); - void (*spin_lock)(struct raw_spinlock *lock); - void (*spin_lock_flags)(struct raw_spinlock *lock, unsigned long flags); - int (*spin_trylock)(struct raw_spinlock *lock); - void (*spin_unlock)(struct raw_spinlock *lock); -}; - -/* This contains all the paravirt structures: we get a convenient - * number for each function using the offset which we use to indicate - * what to patch. */ -struct paravirt_patch_template { - struct pv_init_ops pv_init_ops; - struct pv_time_ops pv_time_ops; - struct pv_cpu_ops pv_cpu_ops; - struct pv_irq_ops pv_irq_ops; - struct pv_apic_ops pv_apic_ops; - struct pv_mmu_ops pv_mmu_ops; - struct pv_lock_ops pv_lock_ops; -}; - -extern struct pv_info pv_info; -extern struct pv_init_ops pv_init_ops; -extern struct pv_time_ops pv_time_ops; -extern struct pv_cpu_ops pv_cpu_ops; -extern struct pv_irq_ops pv_irq_ops; -extern struct pv_apic_ops pv_apic_ops; -extern struct pv_mmu_ops pv_mmu_ops; -extern struct pv_lock_ops pv_lock_ops; - -#define PARAVIRT_PATCH(x) \ - (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) - -#define paravirt_type(op) \ - [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ - [paravirt_opptr] "m" (op) -#define paravirt_clobber(clobber) \ - [paravirt_clobber] "i" (clobber) - -/* - * Generate some code, and mark it as patchable by the - * apply_paravirt() alternate instruction patcher. - */ -#define _paravirt_alt(insn_string, type, clobber) \ - "771:\n\t" insn_string "\n" "772:\n" \ - ".pushsection .parainstructions,\"a\"\n" \ - _ASM_ALIGN "\n" \ - _ASM_PTR " 771b\n" \ - " .byte " type "\n" \ - " .byte 772b-771b\n" \ - " .short " clobber "\n" \ - ".popsection\n" - -/* Generate patchable code, with the default asm parameters. */ -#define paravirt_alt(insn_string) \ - _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") - -/* Simple instruction patching code. */ -#define DEF_NATIVE(ops, name, code) \ - extern const char start_##ops##_##name[], end_##ops##_##name[]; \ - asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":") - -unsigned paravirt_patch_nop(void); -unsigned paravirt_patch_ignore(unsigned len); -unsigned paravirt_patch_call(void *insnbuf, - const void *target, u16 tgt_clobbers, - unsigned long addr, u16 site_clobbers, - unsigned len); -unsigned paravirt_patch_jmp(void *insnbuf, const void *target, - unsigned long addr, unsigned len); -unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, - unsigned long addr, unsigned len); - -unsigned paravirt_patch_insns(void *insnbuf, unsigned len, - const char *start, const char *end); - -unsigned native_patch(u8 type, u16 clobbers, void *ibuf, - unsigned long addr, unsigned len); - -int paravirt_disable_iospace(void); - -/* - * This generates an indirect call based on the operation type number. - * The type number, computed in PARAVIRT_PATCH, is derived from the - * offset into the paravirt_patch_template structure, and can therefore be - * freely converted back into a structure offset. - */ -#define PARAVIRT_CALL "call *%[paravirt_opptr];" - -/* - * These macros are intended to wrap calls through one of the paravirt - * ops structs, so that they can be later identified and patched at - * runtime. - * - * Normally, a call to a pv_op function is a simple indirect call: - * (pv_op_struct.operations)(args...). - * - * Unfortunately, this is a relatively slow operation for modern CPUs, - * because it cannot necessarily determine what the destination - * address is. In this case, the address is a runtime constant, so at - * the very least we can patch the call to e a simple direct call, or - * ideally, patch an inline implementation into the callsite. (Direct - * calls are essentially free, because the call and return addresses - * are completely predictable.) - * - * For i386, these macros rely on the standard gcc "regparm(3)" calling - * convention, in which the first three arguments are placed in %eax, - * %edx, %ecx (in that order), and the remaining arguments are placed - * on the stack. All caller-save registers (eax,edx,ecx) are expected - * to be modified (either clobbered or used for return values). - * X86_64, on the other hand, already specifies a register-based calling - * conventions, returning at %rax, with parameteres going on %rdi, %rsi, - * %rdx, and %rcx. Note that for this reason, x86_64 does not need any - * special handling for dealing with 4 arguments, unlike i386. - * However, x86_64 also have to clobber all caller saved registers, which - * unfortunately, are quite a bit (r8 - r11) - * - * The call instruction itself is marked by placing its start address - * and size into the .parainstructions section, so that - * apply_paravirt() in arch/i386/kernel/alternative.c can do the - * appropriate patching under the control of the backend pv_init_ops - * implementation. - * - * Unfortunately there's no way to get gcc to generate the args setup - * for the call, and then allow the call itself to be generated by an - * inline asm. Because of this, we must do the complete arg setup and - * return value handling from within these macros. This is fairly - * cumbersome. - * - * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. - * It could be extended to more arguments, but there would be little - * to be gained from that. For each number of arguments, there are - * the two VCALL and CALL variants for void and non-void functions. - * - * When there is a return value, the invoker of the macro must specify - * the return type. The macro then uses sizeof() on that type to - * determine whether its a 32 or 64 bit value, and places the return - * in the right register(s) (just %eax for 32-bit, and %edx:%eax for - * 64-bit). For x86_64 machines, it just returns at %rax regardless of - * the return value size. - * - * 64-bit arguments are passed as a pair of adjacent 32-bit arguments - * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments - * in low,high order - * - * Small structures are passed and returned in registers. The macro - * calling convention can't directly deal with this, so the wrapper - * functions must do this. - * - * These PVOP_* macros are only defined within this header. This - * means that all uses must be wrapped in inline functions. This also - * makes sure the incoming and outgoing types are always correct. - */ -#ifdef CONFIG_X86_32 -#define PVOP_VCALL_ARGS unsigned long __eax, __edx, __ecx -#define PVOP_CALL_ARGS PVOP_VCALL_ARGS -#define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ - "=c" (__ecx) -#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS -#define EXTRA_CLOBBERS -#define VEXTRA_CLOBBERS -#else -#define PVOP_VCALL_ARGS unsigned long __edi, __esi, __edx, __ecx -#define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax -#define PVOP_VCALL_CLOBBERS "=D" (__edi), \ - "=S" (__esi), "=d" (__edx), \ - "=c" (__ecx) - -#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) - -#define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" -#define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" -#endif - -#ifdef CONFIG_PARAVIRT_DEBUG -#define PVOP_TEST_NULL(op) BUG_ON(op == NULL) -#else -#define PVOP_TEST_NULL(op) ((void)op) -#endif - -#define __PVOP_CALL(rettype, op, pre, post, ...) \ - ({ \ - rettype __ret; \ - PVOP_CALL_ARGS; \ - PVOP_TEST_NULL(op); \ - /* This is 32-bit specific, but is okay in 64-bit */ \ - /* since this condition will never hold */ \ - if (sizeof(rettype) > sizeof(unsigned long)) { \ - asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ - post \ - : PVOP_CALL_CLOBBERS \ - : paravirt_type(op), \ - paravirt_clobber(CLBR_ANY), \ - ##__VA_ARGS__ \ - : "memory", "cc" EXTRA_CLOBBERS); \ - __ret = (rettype)((((u64)__edx) << 32) | __eax); \ - } else { \ - asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ - post \ - : PVOP_CALL_CLOBBERS \ - : paravirt_type(op), \ - paravirt_clobber(CLBR_ANY), \ - ##__VA_ARGS__ \ - : "memory", "cc" EXTRA_CLOBBERS); \ - __ret = (rettype)__eax; \ - } \ - __ret; \ - }) -#define __PVOP_VCALL(op, pre, post, ...) \ - ({ \ - PVOP_VCALL_ARGS; \ - PVOP_TEST_NULL(op); \ - asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ - post \ - : PVOP_VCALL_CLOBBERS \ - : paravirt_type(op), \ - paravirt_clobber(CLBR_ANY), \ - ##__VA_ARGS__ \ - : "memory", "cc" VEXTRA_CLOBBERS); \ - }) - -#define PVOP_CALL0(rettype, op) \ - __PVOP_CALL(rettype, op, "", "") -#define PVOP_VCALL0(op) \ - __PVOP_VCALL(op, "", "") - -#define PVOP_CALL1(rettype, op, arg1) \ - __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1))) -#define PVOP_VCALL1(op, arg1) \ - __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1))) - -#define PVOP_CALL2(rettype, op, arg1, arg2) \ - __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \ - "1" ((unsigned long)(arg2))) -#define PVOP_VCALL2(op, arg1, arg2) \ - __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \ - "1" ((unsigned long)(arg2))) - -#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ - __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \ - "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3))) -#define PVOP_VCALL3(op, arg1, arg2, arg3) \ - __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \ - "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3))) - -/* This is the only difference in x86_64. We can make it much simpler */ -#ifdef CONFIG_X86_32 -#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ - __PVOP_CALL(rettype, op, \ - "push %[_arg4];", "lea 4(%%esp),%%esp;", \ - "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ - "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) -#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ - __PVOP_VCALL(op, \ - "push %[_arg4];", "lea 4(%%esp),%%esp;", \ - "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ - "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) -#else -#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ - __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \ - "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)), \ - "3"((unsigned long)(arg4))) -#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ - __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \ - "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)), \ - "3"((unsigned long)(arg4))) -#endif - -static inline int paravirt_enabled(void) -{ - return pv_info.paravirt_enabled; -} - -static inline void load_sp0(struct tss_struct *tss, - struct thread_struct *thread) -{ - PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread); -} - -#define ARCH_SETUP pv_init_ops.arch_setup(); -static inline unsigned long get_wallclock(void) -{ - return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock); -} - -static inline int set_wallclock(unsigned long nowtime) -{ - return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime); -} - -static inline void (*choose_time_init(void))(void) -{ - return pv_time_ops.time_init; -} - -/* The paravirtualized CPUID instruction. */ -static inline void __cpuid(unsigned int *eax, unsigned int *ebx, - unsigned int *ecx, unsigned int *edx) -{ - PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx); -} - -/* - * These special macros can be used to get or set a debugging register - */ -static inline unsigned long paravirt_get_debugreg(int reg) -{ - return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg); -} -#define get_debugreg(var, reg) var = paravirt_get_debugreg(reg) -static inline void set_debugreg(unsigned long val, int reg) -{ - PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val); -} - -static inline void clts(void) -{ - PVOP_VCALL0(pv_cpu_ops.clts); -} - -static inline unsigned long read_cr0(void) -{ - return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0); -} - -static inline void write_cr0(unsigned long x) -{ - PVOP_VCALL1(pv_cpu_ops.write_cr0, x); -} - -static inline unsigned long read_cr2(void) -{ - return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2); -} - -static inline void write_cr2(unsigned long x) -{ - PVOP_VCALL1(pv_mmu_ops.write_cr2, x); -} - -static inline unsigned long read_cr3(void) -{ - return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3); -} - -static inline void write_cr3(unsigned long x) -{ - PVOP_VCALL1(pv_mmu_ops.write_cr3, x); -} - -static inline unsigned long read_cr4(void) -{ - return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4); -} -static inline unsigned long read_cr4_safe(void) -{ - return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe); -} - -static inline void write_cr4(unsigned long x) -{ - PVOP_VCALL1(pv_cpu_ops.write_cr4, x); -} - -#ifdef CONFIG_X86_64 -static inline unsigned long read_cr8(void) -{ - return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8); -} - -static inline void write_cr8(unsigned long x) -{ - PVOP_VCALL1(pv_cpu_ops.write_cr8, x); -} -#endif - -static inline void raw_safe_halt(void) -{ - PVOP_VCALL0(pv_irq_ops.safe_halt); -} - -static inline void halt(void) -{ - PVOP_VCALL0(pv_irq_ops.safe_halt); -} - -static inline void wbinvd(void) -{ - PVOP_VCALL0(pv_cpu_ops.wbinvd); -} - -#define get_kernel_rpl() (pv_info.kernel_rpl) - -static inline u64 paravirt_read_msr(unsigned msr, int *err) -{ - return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err); -} -static inline u64 paravirt_read_msr_amd(unsigned msr, int *err) -{ - return PVOP_CALL2(u64, pv_cpu_ops.read_msr_amd, msr, err); -} -static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high) -{ - return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high); -} - -/* These should all do BUG_ON(_err), but our headers are too tangled. */ -#define rdmsr(msr, val1, val2) \ -do { \ - int _err; \ - u64 _l = paravirt_read_msr(msr, &_err); \ - val1 = (u32)_l; \ - val2 = _l >> 32; \ -} while (0) - -#define wrmsr(msr, val1, val2) \ -do { \ - paravirt_write_msr(msr, val1, val2); \ -} while (0) - -#define rdmsrl(msr, val) \ -do { \ - int _err; \ - val = paravirt_read_msr(msr, &_err); \ -} while (0) - -#define wrmsrl(msr, val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32) -#define wrmsr_safe(msr, a, b) paravirt_write_msr(msr, a, b) - -/* rdmsr with exception handling */ -#define rdmsr_safe(msr, a, b) \ -({ \ - int _err; \ - u64 _l = paravirt_read_msr(msr, &_err); \ - (*a) = (u32)_l; \ - (*b) = _l >> 32; \ - _err; \ -}) - -static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) -{ - int err; - - *p = paravirt_read_msr(msr, &err); - return err; -} -static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) -{ - int err; - - *p = paravirt_read_msr_amd(msr, &err); - return err; -} - -static inline u64 paravirt_read_tsc(void) -{ - return PVOP_CALL0(u64, pv_cpu_ops.read_tsc); -} - -#define rdtscl(low) \ -do { \ - u64 _l = paravirt_read_tsc(); \ - low = (int)_l; \ -} while (0) - -#define rdtscll(val) (val = paravirt_read_tsc()) - -static inline unsigned long long paravirt_sched_clock(void) -{ - return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); -} -#define calibrate_tsc() (pv_time_ops.get_tsc_khz()) - -static inline unsigned long long paravirt_read_pmc(int counter) -{ - return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); -} - -#define rdpmc(counter, low, high) \ -do { \ - u64 _l = paravirt_read_pmc(counter); \ - low = (u32)_l; \ - high = _l >> 32; \ -} while (0) - -static inline unsigned long long paravirt_rdtscp(unsigned int *aux) -{ - return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux); -} - -#define rdtscp(low, high, aux) \ -do { \ - int __aux; \ - unsigned long __val = paravirt_rdtscp(&__aux); \ - (low) = (u32)__val; \ - (high) = (u32)(__val >> 32); \ - (aux) = __aux; \ -} while (0) - -#define rdtscpll(val, aux) \ -do { \ - unsigned long __aux; \ - val = paravirt_rdtscp(&__aux); \ - (aux) = __aux; \ -} while (0) - -static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries) -{ - PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries); -} - -static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries) -{ - PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries); -} - -static inline void load_TR_desc(void) -{ - PVOP_VCALL0(pv_cpu_ops.load_tr_desc); -} -static inline void load_gdt(const struct desc_ptr *dtr) -{ - PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr); -} -static inline void load_idt(const struct desc_ptr *dtr) -{ - PVOP_VCALL1(pv_cpu_ops.load_idt, dtr); -} -static inline void set_ldt(const void *addr, unsigned entries) -{ - PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries); -} -static inline void store_gdt(struct desc_ptr *dtr) -{ - PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr); -} -static inline void store_idt(struct desc_ptr *dtr) -{ - PVOP_VCALL1(pv_cpu_ops.store_idt, dtr); -} -static inline unsigned long paravirt_store_tr(void) -{ - return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr); -} -#define store_tr(tr) ((tr) = paravirt_store_tr()) -static inline void load_TLS(struct thread_struct *t, unsigned cpu) -{ - PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu); -} - -#ifdef CONFIG_X86_64 -static inline void load_gs_index(unsigned int gs) -{ - PVOP_VCALL1(pv_cpu_ops.load_gs_index, gs); -} -#endif - -static inline void write_ldt_entry(struct desc_struct *dt, int entry, - const void *desc) -{ - PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc); -} - -static inline void write_gdt_entry(struct desc_struct *dt, int entry, - void *desc, int type) -{ - PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type); -} - -static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) -{ - PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); -} -static inline void set_iopl_mask(unsigned mask) -{ - PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); -} - -/* The paravirtualized I/O functions */ -static inline void slow_down_io(void) -{ - pv_cpu_ops.io_delay(); -#ifdef REALLY_SLOW_IO - pv_cpu_ops.io_delay(); - pv_cpu_ops.io_delay(); - pv_cpu_ops.io_delay(); -#endif -} - -#ifdef CONFIG_X86_LOCAL_APIC -static inline void setup_boot_clock(void) -{ - PVOP_VCALL0(pv_apic_ops.setup_boot_clock); -} - -static inline void setup_secondary_clock(void) -{ - PVOP_VCALL0(pv_apic_ops.setup_secondary_clock); -} -#endif - -static inline void paravirt_post_allocator_init(void) -{ - if (pv_init_ops.post_allocator_init) - (*pv_init_ops.post_allocator_init)(); -} - -static inline void paravirt_pagetable_setup_start(pgd_t *base) -{ - (*pv_mmu_ops.pagetable_setup_start)(base); -} - -static inline void paravirt_pagetable_setup_done(pgd_t *base) -{ - (*pv_mmu_ops.pagetable_setup_done)(base); -} - -#ifdef CONFIG_SMP -static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip, - unsigned long start_esp) -{ - PVOP_VCALL3(pv_apic_ops.startup_ipi_hook, - phys_apicid, start_eip, start_esp); -} -#endif - -static inline void paravirt_activate_mm(struct mm_struct *prev, - struct mm_struct *next) -{ - PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next); -} - -static inline void arch_dup_mmap(struct mm_struct *oldmm, - struct mm_struct *mm) -{ - PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm); -} - -static inline void arch_exit_mmap(struct mm_struct *mm) -{ - PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm); -} - -static inline void __flush_tlb(void) -{ - PVOP_VCALL0(pv_mmu_ops.flush_tlb_user); -} -static inline void __flush_tlb_global(void) -{ - PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel); -} -static inline void __flush_tlb_single(unsigned long addr) -{ - PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr); -} - -static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm, - unsigned long va) -{ - PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va); -} - -static inline int paravirt_pgd_alloc(struct mm_struct *mm) -{ - return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm); -} - -static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) -{ - PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd); -} - -static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) -{ - PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn); -} -static inline void paravirt_release_pte(unsigned long pfn) -{ - PVOP_VCALL1(pv_mmu_ops.release_pte, pfn); -} - -static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) -{ - PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn); -} - -static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, - unsigned long start, unsigned long count) -{ - PVOP_VCALL4(pv_mmu_ops.alloc_pmd_clone, pfn, clonepfn, start, count); -} -static inline void paravirt_release_pmd(unsigned long pfn) -{ - PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn); -} - -static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) -{ - PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn); -} -static inline void paravirt_release_pud(unsigned long pfn) -{ - PVOP_VCALL1(pv_mmu_ops.release_pud, pfn); -} - -#ifdef CONFIG_HIGHPTE -static inline void *kmap_atomic_pte(struct page *page, enum km_type type) -{ - unsigned long ret; - ret = PVOP_CALL2(unsigned long, pv_mmu_ops.kmap_atomic_pte, page, type); - return (void *)ret; -} -#endif - -static inline void pte_update(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep); -} - -static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep); -} - -static inline pte_t __pte(pteval_t val) -{ - pteval_t ret; - - if (sizeof(pteval_t) > sizeof(long)) - ret = PVOP_CALL2(pteval_t, - pv_mmu_ops.make_pte, - val, (u64)val >> 32); - else - ret = PVOP_CALL1(pteval_t, - pv_mmu_ops.make_pte, - val); - - return (pte_t) { .pte = ret }; -} - -static inline pteval_t pte_val(pte_t pte) -{ - pteval_t ret; - - if (sizeof(pteval_t) > sizeof(long)) - ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_val, - pte.pte, (u64)pte.pte >> 32); - else - ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_val, - pte.pte); - - return ret; -} - -static inline pteval_t pte_flags(pte_t pte) -{ - pteval_t ret; - - if (sizeof(pteval_t) > sizeof(long)) - ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_flags, - pte.pte, (u64)pte.pte >> 32); - else - ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_flags, - pte.pte); - -#ifdef CONFIG_PARAVIRT_DEBUG - BUG_ON(ret & PTE_PFN_MASK); -#endif - return ret; -} - -static inline pgd_t __pgd(pgdval_t val) -{ - pgdval_t ret; - - if (sizeof(pgdval_t) > sizeof(long)) - ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.make_pgd, - val, (u64)val >> 32); - else - ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.make_pgd, - val); - - return (pgd_t) { ret }; -} - -static inline pgdval_t pgd_val(pgd_t pgd) -{ - pgdval_t ret; - - if (sizeof(pgdval_t) > sizeof(long)) - ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.pgd_val, - pgd.pgd, (u64)pgd.pgd >> 32); - else - ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.pgd_val, - pgd.pgd); - - return ret; -} - -#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION -static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - pteval_t ret; - - ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start, - mm, addr, ptep); - - return (pte_t) { .pte = ret }; -} - -static inline void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - if (sizeof(pteval_t) > sizeof(long)) - /* 5 arg words */ - pv_mmu_ops.ptep_modify_prot_commit(mm, addr, ptep, pte); - else - PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit, - mm, addr, ptep, pte.pte); -} - -static inline void set_pte(pte_t *ptep, pte_t pte) -{ - if (sizeof(pteval_t) > sizeof(long)) - PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, - pte.pte, (u64)pte.pte >> 32); - else - PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, - pte.pte); -} - -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - if (sizeof(pteval_t) > sizeof(long)) - /* 5 arg words */ - pv_mmu_ops.set_pte_at(mm, addr, ptep, pte); - else - PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte); -} - -static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) -{ - pmdval_t val = native_pmd_val(pmd); - - if (sizeof(pmdval_t) > sizeof(long)) - PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32); - else - PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val); -} - -#if PAGETABLE_LEVELS >= 3 -static inline pmd_t __pmd(pmdval_t val) -{ - pmdval_t ret; - - if (sizeof(pmdval_t) > sizeof(long)) - ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd, - val, (u64)val >> 32); - else - ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.make_pmd, - val); - - return (pmd_t) { ret }; -} - -static inline pmdval_t pmd_val(pmd_t pmd) -{ - pmdval_t ret; - - if (sizeof(pmdval_t) > sizeof(long)) - ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val, - pmd.pmd, (u64)pmd.pmd >> 32); - else - ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.pmd_val, - pmd.pmd); - - return ret; -} - -static inline void set_pud(pud_t *pudp, pud_t pud) -{ - pudval_t val = native_pud_val(pud); - - if (sizeof(pudval_t) > sizeof(long)) - PVOP_VCALL3(pv_mmu_ops.set_pud, pudp, - val, (u64)val >> 32); - else - PVOP_VCALL2(pv_mmu_ops.set_pud, pudp, - val); -} -#if PAGETABLE_LEVELS == 4 -static inline pud_t __pud(pudval_t val) -{ - pudval_t ret; - - if (sizeof(pudval_t) > sizeof(long)) - ret = PVOP_CALL2(pudval_t, pv_mmu_ops.make_pud, - val, (u64)val >> 32); - else - ret = PVOP_CALL1(pudval_t, pv_mmu_ops.make_pud, - val); - - return (pud_t) { ret }; -} - -static inline pudval_t pud_val(pud_t pud) -{ - pudval_t ret; - - if (sizeof(pudval_t) > sizeof(long)) - ret = PVOP_CALL2(pudval_t, pv_mmu_ops.pud_val, - pud.pud, (u64)pud.pud >> 32); - else - ret = PVOP_CALL1(pudval_t, pv_mmu_ops.pud_val, - pud.pud); - - return ret; -} - -static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) -{ - pgdval_t val = native_pgd_val(pgd); - - if (sizeof(pgdval_t) > sizeof(long)) - PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp, - val, (u64)val >> 32); - else - PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, - val); -} - -static inline void pgd_clear(pgd_t *pgdp) -{ - set_pgd(pgdp, __pgd(0)); -} - -static inline void pud_clear(pud_t *pudp) -{ - set_pud(pudp, __pud(0)); -} - -#endif /* PAGETABLE_LEVELS == 4 */ - -#endif /* PAGETABLE_LEVELS >= 3 */ - -#ifdef CONFIG_X86_PAE -/* Special-case pte-setting operations for PAE, which can't update a - 64-bit pte atomically */ -static inline void set_pte_atomic(pte_t *ptep, pte_t pte) -{ - PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep, - pte.pte, pte.pte >> 32); -} - -static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - /* 5 arg words */ - pv_mmu_ops.set_pte_present(mm, addr, ptep, pte); -} - -static inline void pte_clear(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep); -} - -static inline void pmd_clear(pmd_t *pmdp) -{ - PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp); -} -#else /* !CONFIG_X86_PAE */ -static inline void set_pte_atomic(pte_t *ptep, pte_t pte) -{ - set_pte(ptep, pte); -} - -static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - set_pte(ptep, pte); -} - -static inline void pte_clear(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - set_pte_at(mm, addr, ptep, __pte(0)); -} - -static inline void pmd_clear(pmd_t *pmdp) -{ - set_pmd(pmdp, __pmd(0)); -} -#endif /* CONFIG_X86_PAE */ - -/* Lazy mode for batching updates / context switch */ -enum paravirt_lazy_mode { - PARAVIRT_LAZY_NONE, - PARAVIRT_LAZY_MMU, - PARAVIRT_LAZY_CPU, -}; - -enum paravirt_lazy_mode paravirt_get_lazy_mode(void); -void paravirt_enter_lazy_cpu(void); -void paravirt_leave_lazy_cpu(void); -void paravirt_enter_lazy_mmu(void); -void paravirt_leave_lazy_mmu(void); -void paravirt_leave_lazy(enum paravirt_lazy_mode mode); - -#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE -static inline void arch_enter_lazy_cpu_mode(void) -{ - PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter); -} - -static inline void arch_leave_lazy_cpu_mode(void) -{ - PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave); -} - -static inline void arch_flush_lazy_cpu_mode(void) -{ - if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) { - arch_leave_lazy_cpu_mode(); - arch_enter_lazy_cpu_mode(); - } -} - - -#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE -static inline void arch_enter_lazy_mmu_mode(void) -{ - PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter); -} - -static inline void arch_leave_lazy_mmu_mode(void) -{ - PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave); -} - -static inline void arch_flush_lazy_mmu_mode(void) -{ - if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) { - arch_leave_lazy_mmu_mode(); - arch_enter_lazy_mmu_mode(); - } -} - -static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx, - unsigned long phys, pgprot_t flags) -{ - pv_mmu_ops.set_fixmap(idx, phys, flags); -} - -void _paravirt_nop(void); -#define paravirt_nop ((void *)_paravirt_nop) - -void paravirt_use_bytelocks(void); - -#ifdef CONFIG_SMP - -static inline int __raw_spin_is_locked(struct raw_spinlock *lock) -{ - return PVOP_CALL1(int, pv_lock_ops.spin_is_locked, lock); -} - -static inline int __raw_spin_is_contended(struct raw_spinlock *lock) -{ - return PVOP_CALL1(int, pv_lock_ops.spin_is_contended, lock); -} - -static __always_inline void __raw_spin_lock(struct raw_spinlock *lock) -{ - PVOP_VCALL1(pv_lock_ops.spin_lock, lock); -} - -static __always_inline void __raw_spin_lock_flags(struct raw_spinlock *lock, - unsigned long flags) -{ - PVOP_VCALL2(pv_lock_ops.spin_lock_flags, lock, flags); -} - -static __always_inline int __raw_spin_trylock(struct raw_spinlock *lock) -{ - return PVOP_CALL1(int, pv_lock_ops.spin_trylock, lock); -} - -static __always_inline void __raw_spin_unlock(struct raw_spinlock *lock) -{ - PVOP_VCALL1(pv_lock_ops.spin_unlock, lock); -} - -#endif - -/* These all sit in the .parainstructions section to tell us what to patch. */ -struct paravirt_patch_site { - u8 *instr; /* original instructions */ - u8 instrtype; /* type of this instruction */ - u8 len; /* length of original instruction */ - u16 clobbers; /* what registers you may clobber */ -}; - -extern struct paravirt_patch_site __parainstructions[], - __parainstructions_end[]; - -#ifdef CONFIG_X86_32 -#define PV_SAVE_REGS "pushl %%ecx; pushl %%edx;" -#define PV_RESTORE_REGS "popl %%edx; popl %%ecx" -#define PV_FLAGS_ARG "0" -#define PV_EXTRA_CLOBBERS -#define PV_VEXTRA_CLOBBERS -#else -/* We save some registers, but all of them, that's too much. We clobber all - * caller saved registers but the argument parameter */ -#define PV_SAVE_REGS "pushq %%rdi;" -#define PV_RESTORE_REGS "popq %%rdi;" -#define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx", "rsi" -#define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx", "rsi" -#define PV_FLAGS_ARG "D" -#endif - -static inline unsigned long __raw_local_save_flags(void) -{ - unsigned long f; - - asm volatile(paravirt_alt(PV_SAVE_REGS - PARAVIRT_CALL - PV_RESTORE_REGS) - : "=a"(f) - : paravirt_type(pv_irq_ops.save_fl), - paravirt_clobber(CLBR_EAX) - : "memory", "cc" PV_VEXTRA_CLOBBERS); - return f; -} - -static inline void raw_local_irq_restore(unsigned long f) -{ - asm volatile(paravirt_alt(PV_SAVE_REGS - PARAVIRT_CALL - PV_RESTORE_REGS) - : "=a"(f) - : PV_FLAGS_ARG(f), - paravirt_type(pv_irq_ops.restore_fl), - paravirt_clobber(CLBR_EAX) - : "memory", "cc" PV_EXTRA_CLOBBERS); -} - -static inline void raw_local_irq_disable(void) -{ - asm volatile(paravirt_alt(PV_SAVE_REGS - PARAVIRT_CALL - PV_RESTORE_REGS) - : - : paravirt_type(pv_irq_ops.irq_disable), - paravirt_clobber(CLBR_EAX) - : "memory", "eax", "cc" PV_EXTRA_CLOBBERS); -} - -static inline void raw_local_irq_enable(void) -{ - asm volatile(paravirt_alt(PV_SAVE_REGS - PARAVIRT_CALL - PV_RESTORE_REGS) - : - : paravirt_type(pv_irq_ops.irq_enable), - paravirt_clobber(CLBR_EAX) - : "memory", "eax", "cc" PV_EXTRA_CLOBBERS); -} - -static inline unsigned long __raw_local_irq_save(void) -{ - unsigned long f; - - f = __raw_local_save_flags(); - raw_local_irq_disable(); - return f; -} - - -/* Make sure as little as possible of this mess escapes. */ -#undef PARAVIRT_CALL -#undef __PVOP_CALL -#undef __PVOP_VCALL -#undef PVOP_VCALL0 -#undef PVOP_CALL0 -#undef PVOP_VCALL1 -#undef PVOP_CALL1 -#undef PVOP_VCALL2 -#undef PVOP_CALL2 -#undef PVOP_VCALL3 -#undef PVOP_CALL3 -#undef PVOP_VCALL4 -#undef PVOP_CALL4 - -#else /* __ASSEMBLY__ */ - -#define _PVSITE(ptype, clobbers, ops, word, algn) \ -771:; \ - ops; \ -772:; \ - .pushsection .parainstructions,"a"; \ - .align algn; \ - word 771b; \ - .byte ptype; \ - .byte 772b-771b; \ - .short clobbers; \ - .popsection - - -#ifdef CONFIG_X86_64 -#define PV_SAVE_REGS \ - push %rax; \ - push %rcx; \ - push %rdx; \ - push %rsi; \ - push %rdi; \ - push %r8; \ - push %r9; \ - push %r10; \ - push %r11 -#define PV_RESTORE_REGS \ - pop %r11; \ - pop %r10; \ - pop %r9; \ - pop %r8; \ - pop %rdi; \ - pop %rsi; \ - pop %rdx; \ - pop %rcx; \ - pop %rax -#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8) -#define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8) -#define PARA_INDIRECT(addr) *addr(%rip) -#else -#define PV_SAVE_REGS pushl %eax; pushl %edi; pushl %ecx; pushl %edx -#define PV_RESTORE_REGS popl %edx; popl %ecx; popl %edi; popl %eax -#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4) -#define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4) -#define PARA_INDIRECT(addr) *%cs:addr -#endif - -#define INTERRUPT_RETURN \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \ - jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_iret)) - -#define DISABLE_INTERRUPTS(clobbers) \ - PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \ - PV_SAVE_REGS; \ - call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_disable); \ - PV_RESTORE_REGS;) \ - -#define ENABLE_INTERRUPTS(clobbers) \ - PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \ - PV_SAVE_REGS; \ - call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_enable); \ - PV_RESTORE_REGS;) - -#define USERGS_SYSRET32 \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret32), \ - CLBR_NONE, \ - jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret32)) - -#ifdef CONFIG_X86_32 -#define GET_CR0_INTO_EAX \ - push %ecx; push %edx; \ - call PARA_INDIRECT(pv_cpu_ops+PV_CPU_read_cr0); \ - pop %edx; pop %ecx - -#define ENABLE_INTERRUPTS_SYSEXIT \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), \ - CLBR_NONE, \ - jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_irq_enable_sysexit)) - - -#else /* !CONFIG_X86_32 */ - -/* - * If swapgs is used while the userspace stack is still current, - * there's no way to call a pvop. The PV replacement *must* be - * inlined, or the swapgs instruction must be trapped and emulated. - */ -#define SWAPGS_UNSAFE_STACK \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \ - swapgs) - -#define SWAPGS \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \ - PV_SAVE_REGS; \ - call PARA_INDIRECT(pv_cpu_ops+PV_CPU_swapgs); \ - PV_RESTORE_REGS \ - ) - -#define GET_CR2_INTO_RCX \ - call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2); \ - movq %rax, %rcx; \ - xorq %rax, %rax; - -#define PARAVIRT_ADJUST_EXCEPTION_FRAME \ - PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_adjust_exception_frame), \ - CLBR_NONE, \ - call PARA_INDIRECT(pv_irq_ops+PV_IRQ_adjust_exception_frame)) - -#define USERGS_SYSRET64 \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \ - CLBR_NONE, \ - jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret64)) - -#define ENABLE_INTERRUPTS_SYSEXIT32 \ - PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_sysexit), \ - CLBR_NONE, \ - jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_irq_enable_sysexit)) -#endif /* CONFIG_X86_32 */ - -#endif /* __ASSEMBLY__ */ -#endif /* CONFIG_PARAVIRT */ -#endif /* ASM_X86__PARAVIRT_H */ |