#ifndef _ASM_X86_TLBFLUSH_H #define _ASM_X86_TLBFLUSH_H #include <linux/mm.h> #include <linux/sched.h> #include <asm/processor.h> #include <asm/special_insns.h> #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else #define __flush_tlb() __native_flush_tlb() #define __flush_tlb_global() __native_flush_tlb_global() #define __flush_tlb_single(addr) __native_flush_tlb_single(addr) #endif static inline void __native_flush_tlb(void) { native_write_cr3(native_read_cr3()); } static inline void __native_flush_tlb_global_irq_disabled(void) { unsigned long cr4; cr4 = native_read_cr4(); /* clear PGE */ native_write_cr4(cr4 & ~X86_CR4_PGE); /* write old PGE again and flush TLBs */ native_write_cr4(cr4); } static inline void __native_flush_tlb_global(void) { unsigned long flags; /* * Read-modify-write to CR4 - protect it from preemption and * from interrupts. (Use the raw variant because this code can * be called from deep inside debugging code.) */ raw_local_irq_save(flags); __native_flush_tlb_global_irq_disabled(); raw_local_irq_restore(flags); } static inline void __native_flush_tlb_single(unsigned long addr) { asm volatile("invlpg (%0)" ::"r" (addr) : "memory"); } static inline void __flush_tlb_all(void) { if (cpu_has_pge) __flush_tlb_global(); else __flush_tlb(); } static inline void __flush_tlb_one(unsigned long addr) { count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ONE); __flush_tlb_single(addr); } #define TLB_FLUSH_ALL -1UL /* * TLB flushing: * * - flush_tlb() flushes the current mm struct TLBs * - flush_tlb_all() flushes all processes TLBs * - flush_tlb_mm(mm) flushes the specified mm context TLB's * - flush_tlb_page(vma, vmaddr) flushes one page * - flush_tlb_range(vma, start, end) flushes a range of pages * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages * - flush_tlb_others(cpumask, mm, start, end) flushes TLBs on other cpus * * ..but the i386 has somewhat limited tlb flushing capabilities, * and page-granular flushes are available only on i486 and up. */ #ifndef CONFIG_SMP /* "_up" is for UniProcessor. * * This is a helper for other header functions. *Not* intended to be called * directly. All global TLB flushes need to either call this, or to bump the * vm statistics themselves. */ static inline void __flush_tlb_up(void) { count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL); __flush_tlb(); } static inline void flush_tlb_all(void) { count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL); __flush_tlb_all(); } static inline void flush_tlb(void) { __flush_tlb_up(); } static inline void local_flush_tlb(void) { __flush_tlb_up(); } static inline void flush_tlb_mm(struct mm_struct *mm) { if (mm == current->active_mm) __flush_tlb_up(); } static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) { if (vma->vm_mm == current->active_mm) __flush_tlb_one(addr); } static inline void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { if (vma->vm_mm == current->active_mm) __flush_tlb_up(); } static inline void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, unsigned long end, unsigned long vmflag) { if (mm == current->active_mm) __flush_tlb_up(); } static inline void native_flush_tlb_others(const struct cpumask *cpumask, struct mm_struct *mm, unsigned long start, unsigned long end) { } static inline void reset_lazy_tlbstate(void) { } static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) { flush_tlb_all(); } #else /* SMP */ #include <asm/smp.h> #define local_flush_tlb() __flush_tlb() #define flush_tlb_mm(mm) flush_tlb_mm_range(mm, 0UL, TLB_FLUSH_ALL, 0UL) #define flush_tlb_range(vma, start, end) \ flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags) extern void flush_tlb_all(void); extern void flush_tlb_current_task(void); extern void flush_tlb_page(struct vm_area_struct *, unsigned long); extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, unsigned long end, unsigned long vmflag); extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); #define flush_tlb() flush_tlb_current_task() void native_flush_tlb_others(const struct cpumask *cpumask, struct mm_struct *mm, unsigned long start, unsigned long end); #define TLBSTATE_OK 1 #define TLBSTATE_LAZY 2 struct tlb_state { struct mm_struct *active_mm; int state; }; DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate); static inline void reset_lazy_tlbstate(void) { this_cpu_write(cpu_tlbstate.state, 0); this_cpu_write(cpu_tlbstate.active_mm, &init_mm); } #endif /* SMP */ #ifndef CONFIG_PARAVIRT #define flush_tlb_others(mask, mm, start, end) \ native_flush_tlb_others(mask, mm, start, end) #endif #endif /* _ASM_X86_TLBFLUSH_H */