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yaml
---
r: 80218
b: refs/heads/master
c: 6fdc05d
h: refs/heads/master
v: v3
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Jeremy Fitzhardinge authored and Ingo Molnar committed Jan 30, 2008
1 parent fec92cb commit ce2fa7a
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Showing 6 changed files with 18 additions and 37 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: c3bcfb57e1e64b9b2f8b2d90564826637e21c5ea
refs/heads/master: 6fdc05d4794056e0b98901646c4b68c60a01d5eb
5 changes: 3 additions & 2 deletions trunk/arch/x86/mm/init_32.c
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Expand Up @@ -478,11 +478,12 @@ void zap_low_mappings (void)

int nx_enabled = 0;

pteval_t __supported_pte_mask __read_mostly = ~_PAGE_NX;
EXPORT_SYMBOL_GPL(__supported_pte_mask);

#ifdef CONFIG_X86_PAE

static int disable_nx __initdata = 0;
u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
EXPORT_SYMBOL_GPL(__supported_pte_mask);

/*
* noexec = on|off
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2 changes: 0 additions & 2 deletions trunk/include/asm-x86/pgtable-2level.h
Original file line number Diff line number Diff line change
Expand Up @@ -53,8 +53,6 @@ static inline pte_t native_ptep_get_and_clear(pte_t *xp)
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_none(x) (!(x).pte_low)
#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))

/*
* All present pages are kernel-executable:
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14 changes: 0 additions & 14 deletions trunk/include/asm-x86/pgtable-3level.h
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Expand Up @@ -158,20 +158,6 @@ static inline unsigned long pte_pfn(pte_t pte)
return (pte_val(pte) & ~_PAGE_NX) >> PAGE_SHIFT;
}

extern unsigned long long __supported_pte_mask;

static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
{
return __pte((((unsigned long long)page_nr << PAGE_SHIFT) |
pgprot_val(pgprot)) & __supported_pte_mask);
}

static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
{
return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) |
pgprot_val(pgprot)) & __supported_pte_mask);
}

/*
* Bits 0, 6 and 7 are taken in the low part of the pte,
* put the 32 bits of offset into the high part.
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14 changes: 14 additions & 0 deletions trunk/include/asm-x86/pgtable.h
Original file line number Diff line number Diff line change
Expand Up @@ -141,6 +141,20 @@ static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_R
static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); }
static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~_PAGE_PSE); }

extern pteval_t __supported_pte_mask;

static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
{
return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) |
pgprot_val(pgprot)) & __supported_pte_mask);
}

static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
{
return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) |
pgprot_val(pgprot)) & __supported_pte_mask);
}

#endif /* __ASSEMBLY__ */

#ifdef CONFIG_X86_32
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18 changes: 0 additions & 18 deletions trunk/include/asm-x86/pgtable_64.h
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,6 @@ extern pud_t level3_kernel_pgt[512];
extern pud_t level3_ident_pgt[512];
extern pmd_t level2_kernel_pgt[512];
extern pgd_t init_level4_pgt[];
extern unsigned long __supported_pte_mask;

#define swapper_pg_dir init_level4_pgt

Expand Down Expand Up @@ -165,14 +164,6 @@ static inline unsigned long pmd_bad(pmd_t pmd)
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)

static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
{
pte_t pte;
pte_val(pte) = (page_nr << PAGE_SHIFT);
pte_val(pte) |= pgprot_val(pgprot);
pte_val(pte) &= __supported_pte_mask;
return pte;
}
struct vm_area_struct;

static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
Expand Down Expand Up @@ -239,15 +230,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
/* page, protection -> pte */
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))

/* Change flags of a PTE */
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
pte_val(pte) &= _PAGE_CHG_MASK;
pte_val(pte) |= pgprot_val(newprot);
pte_val(pte) &= __supported_pte_mask;
return pte;
}

#define pte_index(address) \
(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \
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