diff options
Diffstat (limited to 'include/asm-x86/pgalloc_32.h')
| -rw-r--r-- | include/asm-x86/pgalloc_32.h | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/include/asm-x86/pgalloc_32.h b/include/asm-x86/pgalloc_32.h index 3482c342789..0caa37a9a25 100644 --- a/include/asm-x86/pgalloc_32.h +++ b/include/asm-x86/pgalloc_32.h @@ -63,21 +63,35 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte) */ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { - BUG(); - return (pmd_t *)2; + 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) { + 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 *pud, pmd_t *pmd) +static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd) { - BUG(); + 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 */ |