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 499e1b32caSBenjamin Herrenschmidt extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte); 509e1b32caSBenjamin Herrenschmidt 519e1b32caSBenjamin Herrenschmidt static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, 529e1b32caSBenjamin Herrenschmidt unsigned long address) 539e1b32caSBenjamin Herrenschmidt { 549e1b32caSBenjamin Herrenschmidt ___pte_free_tlb(tlb, pte); 559e1b32caSBenjamin Herrenschmidt } 56bb898558SAl Viro 57bb898558SAl Viro static inline void pmd_populate_kernel(struct mm_struct *mm, 58bb898558SAl Viro pmd_t *pmd, pte_t *pte) 59bb898558SAl Viro { 60bb898558SAl Viro paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); 61bb898558SAl Viro set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); 62bb898558SAl Viro } 63bb898558SAl Viro 64bb898558SAl Viro static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 65bb898558SAl Viro struct page *pte) 66bb898558SAl Viro { 67bb898558SAl Viro unsigned long pfn = page_to_pfn(pte); 68bb898558SAl Viro 69bb898558SAl Viro paravirt_alloc_pte(mm, pfn); 70bb898558SAl Viro set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); 71bb898558SAl Viro } 72bb898558SAl Viro 73bb898558SAl Viro #define pmd_pgtable(pmd) pmd_page(pmd) 74bb898558SAl Viro 75bb898558SAl Viro #if PAGETABLE_LEVELS > 2 76bb898558SAl Viro static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 77bb898558SAl Viro { 78bb898558SAl Viro return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); 79bb898558SAl Viro } 80bb898558SAl Viro 81bb898558SAl Viro static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 82bb898558SAl Viro { 83bb898558SAl Viro BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); 84bb898558SAl Viro free_page((unsigned long)pmd); 85bb898558SAl Viro } 86bb898558SAl Viro 879e1b32caSBenjamin Herrenschmidt extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); 889e1b32caSBenjamin Herrenschmidt 899e1b32caSBenjamin Herrenschmidt static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, 909e1b32caSBenjamin Herrenschmidt unsigned long adddress) 919e1b32caSBenjamin Herrenschmidt { 929e1b32caSBenjamin Herrenschmidt ___pmd_free_tlb(tlb, pmd); 939e1b32caSBenjamin Herrenschmidt } 94bb898558SAl Viro 95bb898558SAl Viro #ifdef CONFIG_X86_PAE 96bb898558SAl Viro extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 97bb898558SAl Viro #else /* !CONFIG_X86_PAE */ 98bb898558SAl Viro static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 99bb898558SAl Viro { 100bb898558SAl Viro paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); 101bb898558SAl Viro set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); 102bb898558SAl Viro } 103bb898558SAl Viro #endif /* CONFIG_X86_PAE */ 104bb898558SAl Viro 105bb898558SAl Viro #if PAGETABLE_LEVELS > 3 106bb898558SAl Viro static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) 107bb898558SAl Viro { 108bb898558SAl Viro paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); 109bb898558SAl Viro set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); 110bb898558SAl Viro } 111bb898558SAl Viro 112bb898558SAl Viro static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 113bb898558SAl Viro { 114bb898558SAl Viro return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); 115bb898558SAl Viro } 116bb898558SAl Viro 117bb898558SAl Viro static inline void pud_free(struct mm_struct *mm, pud_t *pud) 118bb898558SAl Viro { 119bb898558SAl Viro BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); 120bb898558SAl Viro free_page((unsigned long)pud); 121bb898558SAl Viro } 122bb898558SAl Viro 1239e1b32caSBenjamin Herrenschmidt extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); 1249e1b32caSBenjamin Herrenschmidt 1259e1b32caSBenjamin Herrenschmidt static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, 1269e1b32caSBenjamin Herrenschmidt unsigned long address) 1279e1b32caSBenjamin Herrenschmidt { 1289e1b32caSBenjamin Herrenschmidt ___pud_free_tlb(tlb, pud); 1299e1b32caSBenjamin Herrenschmidt } 1309e1b32caSBenjamin Herrenschmidt 131bb898558SAl Viro #endif /* PAGETABLE_LEVELS > 3 */ 132bb898558SAl Viro #endif /* PAGETABLE_LEVELS > 2 */ 133bb898558SAl Viro 1341965aae3SH. Peter Anvin #endif /* _ASM_X86_PGALLOC_H */ 135