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yaml
---
r: 80223
b: refs/heads/master
c: 195466d
h: refs/heads/master
i:
  80221: be33403
  80219: a8ede27
  80215: 1854901
  80207: a205916
  80191: ca4dfd2
v: v3
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Jeremy Fitzhardinge authored and Ingo Molnar committed Jan 30, 2008
1 parent 2b9fad8 commit 58fd5a0
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Showing 6 changed files with 114 additions and 144 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: e33287013585e96180c575288bf1db22bee47b52
refs/heads/master: 195466dc4b9b8a4cc89d37ea1211746f3afbc941
1 change: 0 additions & 1 deletion trunk/include/asm-x86/pgtable-2level.h
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Expand Up @@ -33,7 +33,6 @@ static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
#define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)

#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)

static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp)
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1 change: 0 additions & 1 deletion trunk/include/asm-x86/pgtable-3level.h
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Expand Up @@ -101,7 +101,6 @@ static inline void native_pmd_clear(pmd_t *pmd)
#define set_pte_atomic(ptep, pte) native_set_pte_atomic(ptep, pte)
#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
#define set_pud(pudp, pud) native_set_pud(pudp, pud)
#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
#define pmd_clear(pmd) native_pmd_clear(pmd)
#endif

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110 changes: 109 additions & 1 deletion trunk/include/asm-x86/pgtable.h
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Expand Up @@ -116,6 +116,7 @@ extern unsigned long long __PAGE_KERNEL, __PAGE_KERNEL_EXEC;
#define __S111 PAGE_SHARED_EXEC

#ifndef __ASSEMBLY__

/*
* The following only work if pte_present() is true.
* Undefined behaviour if not..
Expand Down Expand Up @@ -169,7 +170,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
return __pte(val);
}


#endif /* __ASSEMBLY__ */

#ifdef CONFIG_X86_32
Expand All @@ -178,4 +178,112 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
# include "pgtable_64.h"
#endif

#ifndef __ASSEMBLY__

#ifndef CONFIG_PARAVIRT
/*
* Rules for using pte_update - it must be called after any PTE update which
* has not been done using the set_pte / clear_pte interfaces. It is used by
* shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
* updates should either be sets, clears, or set_pte_atomic for P->P
* transitions, which means this hook should only be called for user PTEs.
* This hook implies a P->P protection or access change has taken place, which
* requires a subsequent TLB flush. The notification can optionally be delayed
* until the TLB flush event by using the pte_update_defer form of the
* interface, but care must be taken to assure that the flush happens while
* still holding the same page table lock so that the shadow and primary pages
* do not become out of sync on SMP.
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
#endif

/* local pte updates need not use xchg for locking */
static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
{
pte_t res = *ptep;

/* Pure native function needs no input for mm, addr */
native_pte_clear(NULL, 0, ptep);
return res;
}

/*
* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
* will do the accessed bit for us, and we don't want to
* race with other CPU's that might be updating the dirty
* bit at the same time.
*/
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
({ \
int __changed = !pte_same(*(ptep), entry); \
if (__changed && dirty) { \
*ptep = entry; \
pte_update_defer((vma)->vm_mm, (address), (ptep)); \
flush_tlb_page(vma, address); \
} \
__changed; \
})

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
int __ret = 0; \
if (pte_young(*(ptep))) \
__ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
&(ptep)->pte); \
if (__ret) \
pte_update((vma)->vm_mm, addr, ptep); \
__ret; \
})

#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
int __young; \
__young = ptep_test_and_clear_young((vma), (address), (ptep)); \
if (__young) \
flush_tlb_page(vma, address); \
__young; \
})

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
return pte;
}

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
{
pte_t pte;
if (full) {
/*
* Full address destruction in progress; paravirt does not
* care about updates and native needs no locking
*/
pte = native_local_ptep_get_and_clear(ptep);
} else {
pte = ptep_get_and_clear(mm, addr, ptep);
}
return pte;
}

#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
clear_bit(_PAGE_BIT_RW, &ptep->pte);
pte_update(mm, addr, ptep);
}

#ifndef CONFIG_PARAVIRT
#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
#endif /* !CONFIG_PARAVIRT */

#include <asm-generic/pgtable.h>
#endif /* __ASSEMBLY__ */

#endif /* _ASM_X86_PGTABLE_H */
101 changes: 0 additions & 101 deletions trunk/include/asm-x86/pgtable_32.h
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Original file line number Diff line number Diff line change
Expand Up @@ -107,105 +107,6 @@ extern unsigned long pg0[];
# include <asm/pgtable-2level.h>
#endif

#ifndef CONFIG_PARAVIRT
/*
* Rules for using pte_update - it must be called after any PTE update which
* has not been done using the set_pte / clear_pte interfaces. It is used by
* shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
* updates should either be sets, clears, or set_pte_atomic for P->P
* transitions, which means this hook should only be called for user PTEs.
* This hook implies a P->P protection or access change has taken place, which
* requires a subsequent TLB flush. The notification can optionally be delayed
* until the TLB flush event by using the pte_update_defer form of the
* interface, but care must be taken to assure that the flush happens while
* still holding the same page table lock so that the shadow and primary pages
* do not become out of sync on SMP.
*/
#define pte_update(mm, addr, ptep) do { } while (0)
#define pte_update_defer(mm, addr, ptep) do { } while (0)
#endif

/* local pte updates need not use xchg for locking */
static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
{
pte_t res = *ptep;

/* Pure native function needs no input for mm, addr */
native_pte_clear(NULL, 0, ptep);
return res;
}

/*
* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
* will do the accessed bit for us, and we don't want to
* race with other CPU's that might be updating the dirty
* bit at the same time.
*/
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
({ \
int __changed = !pte_same(*(ptep), entry); \
if (__changed && dirty) { \
(ptep)->pte_low = (entry).pte_low; \
pte_update_defer((vma)->vm_mm, (address), (ptep)); \
flush_tlb_page(vma, address); \
} \
__changed; \
})

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
int __ret = 0; \
if (pte_young(*(ptep))) \
__ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
&(ptep)->pte_low); \
if (__ret) \
pte_update((vma)->vm_mm, addr, ptep); \
__ret; \
})

#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
int __young; \
__young = ptep_test_and_clear_young((vma), (address), (ptep)); \
if (__young) \
flush_tlb_page(vma, address); \
__young; \
})

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
pte_t pte = native_ptep_get_and_clear(ptep);
pte_update(mm, addr, ptep);
return pte;
}

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
{
pte_t pte;
if (full) {
/*
* Full address destruction in progress; paravirt does not
* care about updates and native needs no locking
*/
pte = native_local_ptep_get_and_clear(ptep);
} else {
pte = ptep_get_and_clear(mm, addr, ptep);
}
return pte;
}

#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
clear_bit(_PAGE_BIT_RW, &ptep->pte_low);
pte_update(mm, addr, ptep);
}

/*
* clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
*
Expand Down Expand Up @@ -359,6 +260,4 @@ static inline void paravirt_pagetable_setup_done(pgd_t *base)
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)

#include <asm-generic/pgtable.h>

#endif /* _I386_PGTABLE_H */
43 changes: 4 additions & 39 deletions trunk/include/asm-x86/pgtable_64.h
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Original file line number Diff line number Diff line change
Expand Up @@ -101,18 +101,18 @@ static inline void pgd_clear (pgd_t * pgd)
set_pgd(pgd, __pgd(0));
}

#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0))
#define native_ptep_get_and_clear(xp) __pte(xchg(&(xp)->pte, 0))

struct mm_struct;

static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
static inline pte_t native_ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
{
pte_t pte;
if (full) {
pte = *ptep;
*ptep = __pte(0);
} else {
pte = ptep_get_and_clear(mm, addr, ptep);
pte = native_ptep_get_and_clear(ptep);
}
return pte;
}
Expand Down Expand Up @@ -158,26 +158,12 @@ static inline unsigned long pmd_bad(pmd_t pmd)

#define pte_none(x) (!pte_val(x))
#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
#define native_pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)

#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this right? */
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)

struct vm_area_struct;

static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
if (!pte_young(*ptep))
return 0;
return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte);
}

static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
clear_bit(_PAGE_BIT_RW, &ptep->pte);
}

/*
* Macro to mark a page protection value as "uncacheable".
*/
Expand Down Expand Up @@ -243,22 +229,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,

#define update_mmu_cache(vma,address,pte) do { } while (0)

/* We only update the dirty/accessed state if we set
* the dirty bit by hand in the kernel, since the hardware
* will do the accessed bit for us, and we don't want to
* race with other CPU's that might be updating the dirty
* bit at the same time. */
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
({ \
int __changed = !pte_same(*(__ptep), __entry); \
if (__changed && __dirty) { \
set_pte(__ptep, __entry); \
flush_tlb_page(__vma, __address); \
} \
__changed; \
})

/* Encode and de-code a swap entry */
#define __swp_type(x) (((x).val >> 1) & 0x3f)
#define __swp_offset(x) ((x).val >> 8)
Expand Down Expand Up @@ -290,12 +260,7 @@ pte_t *lookup_address(unsigned long addr);
#define kc_offset_to_vaddr(o) \
(((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
#include <asm-generic/pgtable.h>
#endif /* !__ASSEMBLY__ */

#endif /* _X86_64_PGTABLE_H */

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