diff options
Diffstat (limited to 'include/asm-x86/pgalloc_32.h')
| -rw-r--r-- | include/asm-x86/pgalloc_32.h | 85 |
1 files changed, 61 insertions, 24 deletions
diff --git a/include/asm-x86/pgalloc_32.h b/include/asm-x86/pgalloc_32.h index f2fc33ceb9f..10c2b452e64 100644 --- a/include/asm-x86/pgalloc_32.h +++ b/include/asm-x86/pgalloc_32.h @@ -3,31 +3,33 @@ #include <linux/threads.h> #include <linux/mm.h> /* for struct page */ +#include <asm/tlb.h> +#include <asm-generic/tlb.h> #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else #define paravirt_alloc_pt(mm, pfn) do { } while (0) -#define paravirt_alloc_pd(pfn) do { } while (0) -#define paravirt_alloc_pd(pfn) do { } while (0) +#define paravirt_alloc_pd(mm, pfn) do { } while (0) #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0) #define paravirt_release_pt(pfn) do { } while (0) #define paravirt_release_pd(pfn) do { } while (0) #endif -#define pmd_populate_kernel(mm, pmd, pte) \ -do { \ - paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \ - set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \ -} while (0) +static inline void pmd_populate_kernel(struct mm_struct *mm, + pmd_t *pmd, pte_t *pte) +{ + paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); + set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); +} + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) +{ + unsigned long pfn = page_to_pfn(pte); -#define pmd_populate(mm, pmd, pte) \ -do { \ - paravirt_alloc_pt(mm, page_to_pfn(pte)); \ - set_pmd(pmd, __pmd(_PAGE_TABLE + \ - ((unsigned long long)page_to_pfn(pte) << \ - (unsigned long long) PAGE_SHIFT))); \ -} while (0) + paravirt_alloc_pt(mm, pfn); + set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); +} /* * Allocate and free page tables. @@ -49,20 +51,55 @@ static inline void pte_free(struct page *pte) } -#define __pte_free_tlb(tlb,pte) \ -do { \ - paravirt_release_pt(page_to_pfn(pte)); \ - tlb_remove_page((tlb),(pte)); \ -} while (0) +static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte) +{ + paravirt_release_pt(page_to_pfn(pte)); + tlb_remove_page(tlb, pte); +} #ifdef CONFIG_X86_PAE /* * In the PAE case we free the pmds as part of the pgd. */ -#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) -#define pmd_free(x) do { } while (0) -#define __pmd_free_tlb(tlb,x) do { } while (0) -#define pud_populate(mm, pmd, pte) BUG() -#endif +static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); +} + +static inline void pmd_free(pmd_t *pmd) +{ + BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); + free_page((unsigned long)pmd); +} + +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) +{ + /* This is called just after the pmd has been detached from + the pgd, which requires a full tlb flush to be recognized + by the CPU. Rather than incurring multiple tlb flushes + while the address space is being pulled down, make the tlb + gathering machinery do a full flush when we're done. */ + tlb->fullmm = 1; + + paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT); + tlb_remove_page(tlb, virt_to_page(pmd)); +} + +static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd) +{ + paravirt_alloc_pd(mm, __pa(pmd) >> PAGE_SHIFT); + + /* Note: almost everything apart from _PAGE_PRESENT is + reserved at the pmd (PDPT) level. */ + set_pud(pudp, __pud(__pa(pmd) | _PAGE_PRESENT)); + + /* + * Pentium-II erratum A13: in PAE mode we explicitly have to flush + * the TLB via cr3 if the top-level pgd is changed... + */ + if (mm == current->active_mm) + write_cr3(read_cr3()); +} +#endif /* CONFIG_X86_PAE */ #endif /* _I386_PGALLOC_H */ |