source: trunk/packages/xen-3.1/xen-3.1/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/tlbflush.h @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 2.6 KB
Line 
1#ifndef _X8664_TLBFLUSH_H
2#define _X8664_TLBFLUSH_H
3
4#include <linux/mm.h>
5#include <asm/processor.h>
6
7#define __flush_tlb()   xen_tlb_flush()
8
9/*
10 * Global pages have to be flushed a bit differently. Not a real
11 * performance problem because this does not happen often.
12 */
13#define __flush_tlb_global()    xen_tlb_flush()
14
15
16extern unsigned long pgkern_mask;
17
18#define __flush_tlb_all() __flush_tlb_global()
19
20#define __flush_tlb_one(addr)   xen_invlpg((unsigned long)addr)
21
22
23/*
24 * TLB flushing:
25 *
26 *  - flush_tlb() flushes the current mm struct TLBs
27 *  - flush_tlb_all() flushes all processes TLBs
28 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
29 *  - flush_tlb_page(vma, vmaddr) flushes one page
30 *  - flush_tlb_range(vma, start, end) flushes a range of pages
31 *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
32 *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
33 *
34 * x86-64 can only flush individual pages or full VMs. For a range flush
35 * we always do the full VM. Might be worth trying if for a small
36 * range a few INVLPGs in a row are a win.
37 */
38
39#ifndef CONFIG_SMP
40
41#define flush_tlb() __flush_tlb()
42#define flush_tlb_all() __flush_tlb_all()
43#define local_flush_tlb() __flush_tlb()
44
45static inline void flush_tlb_mm(struct mm_struct *mm)
46{
47        if (mm == current->active_mm)
48                __flush_tlb();
49}
50
51static inline void flush_tlb_page(struct vm_area_struct *vma,
52        unsigned long addr)
53{
54        if (vma->vm_mm == current->active_mm)
55                __flush_tlb_one(addr);
56}
57
58static inline void flush_tlb_range(struct vm_area_struct *vma,
59        unsigned long start, unsigned long end)
60{
61        if (vma->vm_mm == current->active_mm)
62                __flush_tlb();
63}
64
65#else
66
67#include <asm/smp.h>
68
69#define local_flush_tlb() \
70        __flush_tlb()
71
72extern void flush_tlb_all(void);
73extern void flush_tlb_current_task(void);
74extern void flush_tlb_mm(struct mm_struct *);
75extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
76
77#define flush_tlb()     flush_tlb_current_task()
78
79static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
80{
81        flush_tlb_mm(vma->vm_mm);
82}
83
84#define TLBSTATE_OK     1
85#define TLBSTATE_LAZY   2
86
87/* Roughly an IPI every 20MB with 4k pages for freeing page table
88   ranges. Cost is about 42k of memory for each CPU. */
89#define ARCH_FREE_PTE_NR 5350   
90
91#endif
92
93#define flush_tlb_kernel_range(start, end) flush_tlb_all()
94
95static inline void flush_tlb_pgtables(struct mm_struct *mm,
96                                      unsigned long start, unsigned long end)
97{
98        /* x86_64 does not keep any page table caches in a software TLB.
99           The CPUs do in their hardware TLBs, but they are handled
100           by the normal TLB flushing algorithms. */
101}
102
103#endif /* _X8664_TLBFLUSH_H */
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