11965aae3SH. Peter Anvin #ifndef _ASM_X86_PGALLOC_H 21965aae3SH. Peter Anvin #define _ASM_X86_PGALLOC_H 3bb898558SAl Viro 4bb898558SAl Viro #include <linux/threads.h> 5bb898558SAl Viro #include <linux/mm.h> /* for struct page */ 6bb898558SAl Viro #include <linux/pagemap.h> 7bb898558SAl Viro 8bb898558SAl Viro static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; } 9bb898558SAl Viro 10bb898558SAl Viro #ifdef CONFIG_PARAVIRT 11bb898558SAl Viro #include <asm/paravirt.h> 12bb898558SAl Viro #else 13bb898558SAl Viro #define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm) 14bb898558SAl Viro static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {} 15bb898558SAl Viro static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {} 16bb898558SAl Viro static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {} 17bb898558SAl Viro static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn, 18bb898558SAl Viro unsigned long start, unsigned long count) {} 19bb898558SAl Viro static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {} 20bb898558SAl Viro static inline void paravirt_release_pte(unsigned long pfn) {} 21bb898558SAl Viro static inline void paravirt_release_pmd(unsigned long pfn) {} 22bb898558SAl Viro static inline void paravirt_release_pud(unsigned long pfn) {} 23bb898558SAl Viro #endif 24bb898558SAl Viro 25bb898558SAl Viro /* 26bb898558SAl Viro * Allocate and free page tables. 27bb898558SAl Viro */ 28bb898558SAl Viro extern pgd_t *pgd_alloc(struct mm_struct *); 29bb898558SAl Viro extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 30bb898558SAl Viro 31bb898558SAl Viro extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 32bb898558SAl Viro extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); 33bb898558SAl Viro 34bb898558SAl Viro /* Should really implement gc for free page table pages. This could be 35bb898558SAl Viro done with a reference count in struct page. */ 36bb898558SAl Viro 37bb898558SAl Viro static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 38bb898558SAl Viro { 39bb898558SAl Viro BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); 40bb898558SAl Viro free_page((unsigned long)pte); 41bb898558SAl Viro } 42bb898558SAl Viro 43bb898558SAl Viro static inline void pte_free(struct mm_struct *mm, struct page *pte) 44bb898558SAl Viro { 4542ef73feSPeter Zijlstra pgtable_page_dtor(pte); 46bb898558SAl Viro __free_page(pte); 47bb898558SAl Viro } 48bb898558SAl Viro 49bb898558SAl Viro extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte); 50bb898558SAl Viro 51bb898558SAl Viro static inline void pmd_populate_kernel(struct mm_struct *mm, 52bb898558SAl Viro pmd_t *pmd, pte_t *pte) 53bb898558SAl Viro { 54bb898558SAl Viro paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); 55bb898558SAl Viro set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); 56bb898558SAl Viro } 57bb898558SAl Viro 58bb898558SAl Viro static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 59bb898558SAl Viro struct page *pte) 60bb898558SAl Viro { 61bb898558SAl Viro unsigned long pfn = page_to_pfn(pte); 62bb898558SAl Viro 63bb898558SAl Viro paravirt_alloc_pte(mm, pfn); 64bb898558SAl Viro set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); 65bb898558SAl Viro } 66bb898558SAl Viro 67bb898558SAl Viro #define pmd_pgtable(pmd) pmd_page(pmd) 68bb898558SAl Viro 69bb898558SAl Viro #if PAGETABLE_LEVELS > 2 70bb898558SAl Viro static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 71bb898558SAl Viro { 72bb898558SAl Viro return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); 73bb898558SAl Viro } 74bb898558SAl Viro 75bb898558SAl Viro static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 76bb898558SAl Viro { 77bb898558SAl Viro BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); 78bb898558SAl Viro free_page((unsigned long)pmd); 79bb898558SAl Viro } 80bb898558SAl Viro 81bb898558SAl Viro extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); 82bb898558SAl Viro 83bb898558SAl Viro #ifdef CONFIG_X86_PAE 84bb898558SAl Viro extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 85bb898558SAl Viro #else /* !CONFIG_X86_PAE */ 86bb898558SAl Viro static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 87bb898558SAl Viro { 88bb898558SAl Viro paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); 89bb898558SAl Viro set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); 90bb898558SAl Viro } 91bb898558SAl Viro #endif /* CONFIG_X86_PAE */ 92bb898558SAl Viro 93bb898558SAl Viro #if PAGETABLE_LEVELS > 3 94bb898558SAl Viro static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) 95bb898558SAl Viro { 96bb898558SAl Viro paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); 97bb898558SAl Viro set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); 98bb898558SAl Viro } 99bb898558SAl Viro 100bb898558SAl Viro static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 101bb898558SAl Viro { 102bb898558SAl Viro return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); 103bb898558SAl Viro } 104bb898558SAl Viro 105bb898558SAl Viro static inline void pud_free(struct mm_struct *mm, pud_t *pud) 106bb898558SAl Viro { 107bb898558SAl Viro BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); 108bb898558SAl Viro free_page((unsigned long)pud); 109bb898558SAl Viro } 110bb898558SAl Viro 111bb898558SAl Viro extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); 112bb898558SAl Viro #endif /* PAGETABLE_LEVELS > 3 */ 113bb898558SAl Viro #endif /* PAGETABLE_LEVELS > 2 */ 114bb898558SAl Viro 1151965aae3SH. Peter Anvin #endif /* _ASM_X86_PGALLOC_H */ 116