1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef _I386_TLBFLUSH_H 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _I386_TLBFLUSH_H 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/mm.h> 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/processor.h> 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_PARAVIRT 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/paravirt.h> 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __flush_tlb() __native_flush_tlb() 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __flush_tlb_global() __native_flush_tlb_global() 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __flush_tlb_single(addr) __native_flush_tlb_single(addr) 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __native_flush_tlb() \ 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned int tmpreg; \ 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru \ 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __asm__ __volatile__( \ 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %%cr3, %0; \n" \ 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %0, %%cr3; # flush TLB \n" \ 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru : "=r" (tmpreg) \ 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru :: "memory"); \ 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Global pages have to be flushed a bit differently. Not a real 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * performance problem because this does not happen often. 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __native_flush_tlb_global() \ 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned int tmpreg, cr4, cr4_orig; \ 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru \ 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __asm__ __volatile__( \ 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %%cr4, %2; # turn off PGE \n" \ 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %2, %1; \n" \ 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "andl %3, %1; \n" \ 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %1, %%cr4; \n" \ 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %%cr3, %0; \n" \ 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %0, %%cr3; # flush TLB \n" \ 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru "movl %2, %%cr4; # turn PGE back on \n" \ 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru : "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig) \ 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru : "i" (~X86_CR4_PGE) \ 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru : "memory"); \ 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define __native_flush_tlb_single(addr) \ 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __asm__ __volatile__("invlpg (%0)" ::"r" (addr) : "memory") 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define __flush_tlb_all() \ 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (cpu_has_pge) \ 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb_global(); \ 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru else \ 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb(); \ 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define cpu_has_invlpg (boot_cpu_data.x86 > 3) 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_X86_INVLPG 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define __flush_tlb_one(addr) __flush_tlb_single(addr) 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define __flush_tlb_one(addr) \ 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru do { \ 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (cpu_has_invlpg) \ 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb_single(addr); \ 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru else \ 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb(); \ 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } while (0) 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/* 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * TLB flushing: 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb() flushes the current mm struct TLBs 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_all() flushes all processes TLBs 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_mm(mm) flushes the specified mm context TLB's 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_page(vma, vmaddr) flushes one page 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_range(vma, start, end) flushes a range of pages 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * - flush_tlb_others(cpumask, mm, va) flushes a TLBs on other cpus 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * ..but the i386 has somewhat limited tlb flushing capabilities, 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * and page-granular flushes are available only on i486 and up. 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TLB_FLUSH_ALL 0xffffffff 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef CONFIG_SMP 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/sched.h> 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define flush_tlb() __flush_tlb() 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define flush_tlb_all() __flush_tlb_all() 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define local_flush_tlb() __flush_tlb() 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void flush_tlb_mm(struct mm_struct *mm) 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (mm == current->active_mm) 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb(); 102c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 103c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 104c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void flush_tlb_page(struct vm_area_struct *vma, 105c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long addr) 106c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 107c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (vma->vm_mm == current->active_mm) 108c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb_one(addr); 109c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 110c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 111c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void flush_tlb_range(struct vm_area_struct *vma, 112c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long start, unsigned long end) 113c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 114c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru if (vma->vm_mm == current->active_mm) 115c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb(); 116c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 117c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 118c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void native_flush_tlb_others(const cpumask_t *cpumask, 119c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct mm_struct *mm, unsigned long va) 120c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 121c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 122c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 123c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else /* SMP */ 124c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 125c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <asm/smp.h> 126c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 127c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define local_flush_tlb() \ 128c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __flush_tlb() 129c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 130c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void flush_tlb_all(void); 131c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void flush_tlb_current_task(void); 132c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void flush_tlb_mm(struct mm_struct *); 133c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void flush_tlb_page(struct vm_area_struct *, unsigned long); 134c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 135c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define flush_tlb() flush_tlb_current_task() 136c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 137c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end) 138c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 139c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru flush_tlb_mm(vma->vm_mm); 140c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 141c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 142c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruvoid native_flush_tlb_others(const cpumask_t *cpumask, struct mm_struct *mm, 143c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long va); 144c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 145c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TLBSTATE_OK 1 146c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TLBSTATE_LAZY 2 147c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 148c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct tlb_state 149c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 150c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct mm_struct *active_mm; 151c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru int state; 152c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru char __cacheline_padding[L1_CACHE_BYTES-8]; 153c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 154c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste QueruDECLARE_PER_CPU(struct tlb_state, cpu_tlbstate); 155c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* SMP */ 156c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 157c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef CONFIG_PARAVIRT 158c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define flush_tlb_others(mask, mm, va) \ 159c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru native_flush_tlb_others(&mask, mm, va) 160c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 161c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 162c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void flush_tlb_kernel_range(unsigned long start, 163c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long end) 164c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 165c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru flush_tlb_all(); 166c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 167c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 168c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif /* _I386_TLBFLUSH_H */ 169