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)
60 __flush_tlb_single(addr);
65 #define TLB_FLUSH_ALL -1UL
70 * - flush_tlb() flushes the current mm struct TLBs
71 * - flush_tlb_all() flushes all processes TLBs
72 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
73 * - flush_tlb_page(vma, vmaddr) flushes one page
74 * - flush_tlb_range(vma, start, end) flushes a range of pages
75 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
76 * - flush_tlb_others(cpumask, mm, va) flushes TLBs on other cpus
78 * ..but the i386 has somewhat limited tlb flushing capabilities,
79 * and page-granular flushes are available only on i486 and up.
81 * x86-64 can only flush individual pages or full VMs. For a range flush
82 * we always do the full VM. Might be worth trying if for a small
83 * range a few INVLPGs in a row are a win.
88 #define flush_tlb() __flush_tlb()
89 #define flush_tlb_all() __flush_tlb_all()
90 #define local_flush_tlb() __flush_tlb()
92 static inline void flush_tlb_mm(struct mm_struct *mm)
94 if (mm == current->active_mm)
98 static inline void flush_tlb_page(struct vm_area_struct *vma,
101 if (vma->vm_mm == current->active_mm)
102 __flush_tlb_one(addr);
105 static inline void flush_tlb_range(struct vm_area_struct *vma,
106 unsigned long start, unsigned long end)
108 if (vma->vm_mm == current->active_mm)
112 static inline void native_flush_tlb_others(const struct cpumask *cpumask,
113 struct mm_struct *mm,
118 static inline void reset_lazy_tlbstate(void)
126 #define local_flush_tlb() __flush_tlb()
128 extern void flush_tlb_all(void);
129 extern void flush_tlb_current_task(void);
130 extern void flush_tlb_mm(struct mm_struct *);
131 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
133 #define flush_tlb() flush_tlb_current_task()
135 static inline void flush_tlb_range(struct vm_area_struct *vma,
136 unsigned long start, unsigned long end)
138 flush_tlb_mm(vma->vm_mm);
141 void native_flush_tlb_others(const struct cpumask *cpumask,
142 struct mm_struct *mm, unsigned long va);
144 #define TLBSTATE_OK 1
145 #define TLBSTATE_LAZY 2
148 struct mm_struct *active_mm;
151 DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state, cpu_tlbstate);
153 static inline void reset_lazy_tlbstate(void)
155 this_cpu_write(cpu_tlbstate.state, 0);
156 this_cpu_write(cpu_tlbstate.active_mm, &init_mm);
161 #ifndef CONFIG_PARAVIRT
162 #define flush_tlb_others(mask, mm, va) native_flush_tlb_others(mask, mm, va)
165 static inline void flush_tlb_kernel_range(unsigned long start,
171 #endif /* _ASM_X86_TLBFLUSH_H */