b5a27bd77669a09af0f32af529452d786240a496
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, start, end) 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.
84 #define flush_tlb() __flush_tlb()
85 #define flush_tlb_all() __flush_tlb_all()
86 #define local_flush_tlb() __flush_tlb()
88 static inline void flush_tlb_mm(struct mm_struct
*mm
)
90 if (mm
== current
->active_mm
)
94 static inline void flush_tlb_page(struct vm_area_struct
*vma
,
97 if (vma
->vm_mm
== current
->active_mm
)
98 __flush_tlb_one(addr
);
101 static inline void flush_tlb_range(struct vm_area_struct
*vma
,
102 unsigned long start
, unsigned long end
)
104 if (vma
->vm_mm
== current
->active_mm
)
108 static inline void flush_tlb_mm_range(struct vm_area_struct
*vma
,
109 unsigned long start
, unsigned long end
, unsigned long vmflag
)
111 if (vma
->vm_mm
== current
->active_mm
)
115 static inline void native_flush_tlb_others(const struct cpumask
*cpumask
,
116 struct mm_struct
*mm
,
122 static inline void reset_lazy_tlbstate(void)
126 static inline void flush_tlb_kernel_range(unsigned long start
,
136 #define local_flush_tlb() __flush_tlb()
138 #define flush_tlb_mm(mm) flush_tlb_mm_range(mm, 0UL, TLB_FLUSH_ALL, 0UL)
140 #define flush_tlb_range(vma, start, end) \
141 flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
143 extern void flush_tlb_all(void);
144 extern void flush_tlb_current_task(void);
145 extern void flush_tlb_page(struct vm_area_struct
*, unsigned long);
146 extern void flush_tlb_mm_range(struct mm_struct
*mm
, unsigned long start
,
147 unsigned long end
, unsigned long vmflag
);
148 extern void flush_tlb_kernel_range(unsigned long start
, unsigned long end
);
150 #define flush_tlb() flush_tlb_current_task()
152 void native_flush_tlb_others(const struct cpumask
*cpumask
,
153 struct mm_struct
*mm
,
154 unsigned long start
, unsigned long end
);
156 #define TLBSTATE_OK 1
157 #define TLBSTATE_LAZY 2
160 struct mm_struct
*active_mm
;
163 DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state
, cpu_tlbstate
);
165 static inline void reset_lazy_tlbstate(void)
167 this_cpu_write(cpu_tlbstate
.state
, 0);
168 this_cpu_write(cpu_tlbstate
.active_mm
, &init_mm
);
173 #ifndef CONFIG_PARAVIRT
174 #define flush_tlb_others(mask, mm, start, end) \
175 native_flush_tlb_others(mask, mm, start, end)
178 #endif /* _ASM_X86_TLBFLUSH_H */