Messages in this thread Patch in this message | | | Date | Tue, 17 Jun 2008 11:41:59 -0700 | From | Jeremy Fitzhardinge <> | Subject | [PATCH 3/4] x86: implement set_pte_vaddr |
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Re-name set_pte_pfn() to set_pte_vaddr(), taking a pte_t rather than pfn/flags, and expose it. This allows the pte to constructed in arbitrary ways, rather than just via __pte(), which may be necessary in a virtual environment.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> --- arch/x86/mm/init_64.c | 9 ++++----- arch/x86/mm/pgtable.c | 2 +- arch/x86/mm/pgtable_32.c | 6 +++--- include/asm-x86/pgtable.h | 3 +++ 4 files changed, 11 insertions(+), 9 deletions(-)
=================================================================== --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -136,15 +136,15 @@ static __init void *spp_getpage(void) return ptr; } -static void -set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot) +void +set_pte_vaddr(unsigned long vaddr, pte_t new_pte) { pgd_t *pgd; pud_t *pud; pmd_t *pmd; - pte_t *pte, new_pte; + pte_t *pte; - pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys); + pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte)); pgd = pgd_offset_k(vaddr); if (pgd_none(*pgd)) { @@ -171,7 +171,6 @@ set_pte_phys(unsigned long vaddr, unsign return; } } - new_pte = pfn_pte(phys >> PAGE_SHIFT, prot); pte = pte_offset_kernel(pmd, vaddr); if (!pte_none(*pte) && pte_val(new_pte) && diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c =================================================================== --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -285,6 +285,6 @@ void __set_fixmap (enum fixed_addresses BUG(); return; } - set_pte_pfn(address, phys >> PAGE_SHIFT, flags); + set_pte_vaddr(address, pfn_pte(phys >> PAGE_SHIFT, flags)); fixmaps_set++; } diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c =================================================================== --- a/arch/x86/mm/pgtable_32.c +++ b/arch/x86/mm/pgtable_32.c @@ -71,7 +71,7 @@ void show_mem(void) * Associate a virtual page frame with a given physical page frame * and protection flags for that frame. */ -static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags) +void set_pte_vaddr(unsigned long vaddr, pte_t pteval) { pgd_t *pgd; pud_t *pud; @@ -94,8 +94,8 @@ static void set_pte_pfn(unsigned long va return; } pte = pte_offset_kernel(pmd, vaddr); - if (pgprot_val(flags)) - set_pte_present(&init_mm, vaddr, pte, pfn_pte(pfn, flags)); + if (pte_val(pteval)) + set_pte_present(&init_mm, vaddr, pte, pteval); else pte_clear(&init_mm, vaddr, pte); diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h =================================================================== --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -313,6 +313,9 @@ int phys_mem_access_prot_allowed(struct unsigned long size, pgprot_t *vma_prot); #endif +/* Install a pte for a particular vaddr in kernel space. */ +void set_pte_vaddr(unsigned long vaddr, pte_t pte); + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else /* !CONFIG_PARAVIRT */
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