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 /* 2614315592SIan Campbell * Flags to use when allocating a user page table page. 2714315592SIan Campbell */ 2814315592SIan Campbell extern gfp_t __userpte_alloc_gfp; 2914315592SIan Campbell 3014315592SIan Campbell /* 31bb898558SAl Viro * Allocate and free page tables. 32bb898558SAl Viro */ 33bb898558SAl Viro extern pgd_t *pgd_alloc(struct mm_struct *); 34bb898558SAl Viro extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 35bb898558SAl Viro 36bb898558SAl Viro extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 37bb898558SAl Viro extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); 38bb898558SAl Viro 39bb898558SAl Viro /* Should really implement gc for free page table pages. This could be 40bb898558SAl Viro done with a reference count in struct page. */ 41bb898558SAl Viro 42bb898558SAl Viro static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 43bb898558SAl Viro { 44bb898558SAl Viro BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); 45bb898558SAl Viro free_page((unsigned long)pte); 46bb898558SAl Viro } 47bb898558SAl Viro 48bb898558SAl Viro static inline void pte_free(struct mm_struct *mm, struct page *pte) 49bb898558SAl Viro { 5042ef73feSPeter Zijlstra pgtable_page_dtor(pte); 51bb898558SAl Viro __free_page(pte); 52bb898558SAl Viro } 53bb898558SAl Viro 549e1b32caSBenjamin Herrenschmidt extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte); 559e1b32caSBenjamin Herrenschmidt 569e1b32caSBenjamin Herrenschmidt static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, 579e1b32caSBenjamin Herrenschmidt unsigned long address) 589e1b32caSBenjamin Herrenschmidt { 599e1b32caSBenjamin Herrenschmidt ___pte_free_tlb(tlb, pte); 609e1b32caSBenjamin Herrenschmidt } 61bb898558SAl Viro 62bb898558SAl Viro static inline void pmd_populate_kernel(struct mm_struct *mm, 63bb898558SAl Viro pmd_t *pmd, pte_t *pte) 64bb898558SAl Viro { 65bb898558SAl Viro paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT); 66bb898558SAl Viro set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)); 67bb898558SAl Viro } 68bb898558SAl Viro 69bb898558SAl Viro static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 70bb898558SAl Viro struct page *pte) 71bb898558SAl Viro { 72bb898558SAl Viro unsigned long pfn = page_to_pfn(pte); 73bb898558SAl Viro 74bb898558SAl Viro paravirt_alloc_pte(mm, pfn); 75bb898558SAl Viro set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE)); 76bb898558SAl Viro } 77bb898558SAl Viro 78bb898558SAl Viro #define pmd_pgtable(pmd) pmd_page(pmd) 79bb898558SAl Viro 8098233368SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS > 2 81bb898558SAl Viro static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) 82bb898558SAl Viro { 839491846fSKirill A. Shutemov struct page *page; 849491846fSKirill A. Shutemov page = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); 859491846fSKirill A. Shutemov if (!page) 869491846fSKirill A. Shutemov return NULL; 879491846fSKirill A. Shutemov if (!pgtable_pmd_page_ctor(page)) { 889491846fSKirill A. Shutemov __free_pages(page, 0); 899491846fSKirill A. Shutemov return NULL; 909491846fSKirill A. Shutemov } 919491846fSKirill A. Shutemov return (pmd_t *)page_address(page); 92bb898558SAl Viro } 93bb898558SAl Viro 94bb898558SAl Viro static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 95bb898558SAl Viro { 96bb898558SAl Viro BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); 979491846fSKirill A. Shutemov pgtable_pmd_page_dtor(virt_to_page(pmd)); 98bb898558SAl Viro free_page((unsigned long)pmd); 99bb898558SAl Viro } 100bb898558SAl Viro 1019e1b32caSBenjamin Herrenschmidt extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); 1029e1b32caSBenjamin Herrenschmidt 1039e1b32caSBenjamin Herrenschmidt static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, 104b595076aSUwe Kleine-König unsigned long address) 1059e1b32caSBenjamin Herrenschmidt { 1069e1b32caSBenjamin Herrenschmidt ___pmd_free_tlb(tlb, pmd); 1079e1b32caSBenjamin Herrenschmidt } 108bb898558SAl Viro 109bb898558SAl Viro #ifdef CONFIG_X86_PAE 110bb898558SAl Viro extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 111bb898558SAl Viro #else /* !CONFIG_X86_PAE */ 112bb898558SAl Viro static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 113bb898558SAl Viro { 114bb898558SAl Viro paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); 115bb898558SAl Viro set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); 116bb898558SAl Viro } 117bb898558SAl Viro #endif /* CONFIG_X86_PAE */ 118bb898558SAl Viro 11998233368SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS > 3 120bb898558SAl Viro static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) 121bb898558SAl Viro { 122bb898558SAl Viro paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); 123bb898558SAl Viro set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); 124bb898558SAl Viro } 125bb898558SAl Viro 126bb898558SAl Viro static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 127bb898558SAl Viro { 128bb898558SAl Viro return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); 129bb898558SAl Viro } 130bb898558SAl Viro 131bb898558SAl Viro static inline void pud_free(struct mm_struct *mm, pud_t *pud) 132bb898558SAl Viro { 133bb898558SAl Viro BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); 134bb898558SAl Viro free_page((unsigned long)pud); 135bb898558SAl Viro } 136bb898558SAl Viro 1379e1b32caSBenjamin Herrenschmidt extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); 1389e1b32caSBenjamin Herrenschmidt 1399e1b32caSBenjamin Herrenschmidt static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, 1409e1b32caSBenjamin Herrenschmidt unsigned long address) 1419e1b32caSBenjamin Herrenschmidt { 1429e1b32caSBenjamin Herrenschmidt ___pud_free_tlb(tlb, pud); 1439e1b32caSBenjamin Herrenschmidt } 1449e1b32caSBenjamin Herrenschmidt 14598233368SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS > 3 */ 14698233368SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS > 2 */ 147bb898558SAl Viro 1481965aae3SH. Peter Anvin #endif /* _ASM_X86_PGALLOC_H */ 149