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_irq_disabled(void)
27 cr4
= native_read_cr4();
29 native_write_cr4(cr4
& ~X86_CR4_PGE
);
30 /* write old PGE again and flush TLBs */
31 native_write_cr4(cr4
);
34 static inline void __native_flush_tlb_global(void)
39 * Read-modify-write to CR4 - protect it from preemption and
40 * from interrupts. (Use the raw variant because this code can
41 * be called from deep inside debugging code.)
43 raw_local_irq_save(flags
);
45 __native_flush_tlb_global_irq_disabled();
47 raw_local_irq_restore(flags
);
50 static inline void __native_flush_tlb_single(unsigned long addr
)
52 asm volatile("invlpg (%0)" ::"r" (addr
) : "memory");
55 static inline void __flush_tlb_all(void)
63 static inline void __flush_tlb_one(unsigned long addr
)
65 count_vm_event(NR_TLB_LOCAL_FLUSH_ONE
);
66 __flush_tlb_single(addr
);
69 #define TLB_FLUSH_ALL -1UL
74 * - flush_tlb() flushes the current mm struct TLBs
75 * - flush_tlb_all() flushes all processes TLBs
76 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
77 * - flush_tlb_page(vma, vmaddr) flushes one page
78 * - flush_tlb_range(vma, start, end) flushes a range of pages
79 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
80 * - flush_tlb_others(cpumask, mm, start, end) flushes TLBs on other cpus
82 * ..but the i386 has somewhat limited tlb flushing capabilities,
83 * and page-granular flushes are available only on i486 and up.
88 /* "_up" is for UniProcessor.
90 * This is a helper for other header functions. *Not* intended to be called
91 * directly. All global TLB flushes need to either call this, or to bump the
92 * vm statistics themselves.
94 static inline void __flush_tlb_up(void)
96 count_vm_event(NR_TLB_LOCAL_FLUSH_ALL
);
100 static inline void flush_tlb_all(void)
102 count_vm_event(NR_TLB_LOCAL_FLUSH_ALL
);
106 static inline void flush_tlb(void)
111 static inline void local_flush_tlb(void)
116 static inline void flush_tlb_mm(struct mm_struct
*mm
)
118 if (mm
== current
->active_mm
)
122 static inline void flush_tlb_page(struct vm_area_struct
*vma
,
125 if (vma
->vm_mm
== current
->active_mm
)
126 __flush_tlb_one(addr
);
129 static inline void flush_tlb_range(struct vm_area_struct
*vma
,
130 unsigned long start
, unsigned long end
)
132 if (vma
->vm_mm
== current
->active_mm
)
136 static inline void flush_tlb_mm_range(struct mm_struct
*mm
,
137 unsigned long start
, unsigned long end
, unsigned long vmflag
)
139 if (mm
== current
->active_mm
)
143 static inline void native_flush_tlb_others(const struct cpumask
*cpumask
,
144 struct mm_struct
*mm
,
150 static inline void reset_lazy_tlbstate(void)
154 static inline void flush_tlb_kernel_range(unsigned long start
,
164 #define local_flush_tlb() __flush_tlb()
166 #define flush_tlb_mm(mm) flush_tlb_mm_range(mm, 0UL, TLB_FLUSH_ALL, 0UL)
168 #define flush_tlb_range(vma, start, end) \
169 flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
171 extern void flush_tlb_all(void);
172 extern void flush_tlb_current_task(void);
173 extern void flush_tlb_page(struct vm_area_struct
*, unsigned long);
174 extern void flush_tlb_mm_range(struct mm_struct
*mm
, unsigned long start
,
175 unsigned long end
, unsigned long vmflag
);
176 extern void flush_tlb_kernel_range(unsigned long start
, unsigned long end
);
178 #define flush_tlb() flush_tlb_current_task()
180 void native_flush_tlb_others(const struct cpumask
*cpumask
,
181 struct mm_struct
*mm
,
182 unsigned long start
, unsigned long end
);
184 #define TLBSTATE_OK 1
185 #define TLBSTATE_LAZY 2
188 struct mm_struct
*active_mm
;
191 DECLARE_PER_CPU_SHARED_ALIGNED(struct tlb_state
, cpu_tlbstate
);
193 static inline void reset_lazy_tlbstate(void)
195 this_cpu_write(cpu_tlbstate
.state
, 0);
196 this_cpu_write(cpu_tlbstate
.active_mm
, &init_mm
);
201 #ifndef CONFIG_PARAVIRT
202 #define flush_tlb_others(mask, mm, start, end) \
203 native_flush_tlb_others(mask, mm, start, end)
206 #endif /* _ASM_X86_TLBFLUSH_H */