1 #ifndef _ASM_X86_TLBFLUSH_H
2 #define _ASM_X86_TLBFLUSH_H
5 #include <linux/sched.h>
7 #include <asm/processor.h>
8 #include <asm/special_insns.h>
10 #ifdef CONFIG_PARAVIRT
11 #include <asm/paravirt.h>
13 #define __flush_tlb() __native_flush_tlb()
14 #define __flush_tlb_global() __native_flush_tlb_global()
15 #define __flush_tlb_single(addr) __native_flush_tlb_single(addr)
18 static inline void __native_flush_tlb(void)
20 native_write_cr3(native_read_cr3());
23 static inline void __native_flush_tlb_global(void)
29 * Read-modify-write to CR4 - protect it from preemption and
30 * from interrupts. (Use the raw variant because this code can
31 * be called from deep inside debugging code.)
33 raw_local_irq_save(flags);
35 cr4 = native_read_cr4();
37 native_write_cr4(cr4 & ~X86_CR4_PGE);
38 /* write old PGE again and flush TLBs */
39 native_write_cr4(cr4);
41 raw_local_irq_restore(flags);
44 static inline void __native_flush_tlb_single(unsigned long addr)
46 asm volatile("invlpg (%0)" ::"r" (addr) : "memory");
49 static inline void __flush_tlb_all(void)
57 static inline void __flush_tlb_one(unsigned long addr)
59 __flush_tlb_single(addr);
62 #define TLB_FLUSH_ALL -1UL
67 * - flush_tlb() flushes the current mm struct TLBs
68 * - flush_tlb_all() flushes all processes TLBs
69 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
70 * - flush_tlb_page(vma, vmaddr) flushes one page
71 * - flush_tlb_range(vma, start, end) flushes a range of pages
72 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
73 * - flush_tlb_others(cpumask, mm, start, end) flushes TLBs on other cpus
75 * ..but the i386 has somewhat limited tlb flushing capabilities,
76 * and page-granular flushes are available only on i486 and up.
81 #define flush_tlb() __flush_tlb()
82 #define flush_tlb_all() __flush_tlb_all()
83 #define local_flush_tlb() __flush_tlb()
85 static inline void flush_tlb_mm(struct mm_struct *mm)
87 if (mm == current->active_mm)
91 static inline void flush_tlb_page(struct vm_area_struct *vma,
94 if (vma->vm_mm == current->active_mm)
95 __flush_tlb_one(addr);
98 static inline void flush_tlb_range(struct vm_area_struct *vma,
99 unsigned long start, unsigned long end)
101 if (vma->vm_mm == current->active_mm)
105 static inline void flush_tlb_mm_range(struct mm_struct *mm,
106 unsigned long start, unsigned long end, unsigned long vmflag)
108 if (mm == current->active_mm)
112 static inline void native_flush_tlb_others(const struct cpumask *cpumask,
113 struct mm_struct *mm,
119 static inline void reset_lazy_tlbstate(void)
123 static inline void flush_tlb_kernel_range(unsigned long start,
133 #define local_flush_tlb() __flush_tlb()
135 #define flush_tlb_mm(mm) flush_tlb_mm_range(mm, 0UL, TLB_FLUSH_ALL, 0UL)
137 #define flush_tlb_range(vma, start, end) \
138 flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
140 extern void flush_tlb_all(void);
141 extern void flush_tlb_current_task(void);
142 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
143 extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
144 unsigned long end, unsigned long vmflag);
145 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
147 #define flush_tlb() flush_tlb_current_task()
149 void native_flush_tlb_others(const struct cpumask *cpumask,
150 struct mm_struct *mm,
151 unsigned long start, unsigned long end);
153 #define TLBSTATE_OK 1
154 #define TLBSTATE_LAZY 2
157 struct mm_struct *active_mm;
160 DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate);
162 static inline void reset_lazy_tlbstate(void)
164 this_cpu_write(cpu_tlbstate.state, 0);
165 this_cpu_write(cpu_tlbstate.active_mm, &init_mm);
170 #ifndef CONFIG_PARAVIRT
171 #define flush_tlb_others(mask, mm, start, end) \
172 native_flush_tlb_others(mask, mm, start, end)
175 #endif /* _ASM_X86_TLBFLUSH_H */