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; 843e79ec7dSVladimir Davydov gfp_t gfp = GFP_KERNEL_ACCOUNT | __GFP_ZERO; 853e79ec7dSVladimir Davydov 863e79ec7dSVladimir Davydov if (mm == &init_mm) 873e79ec7dSVladimir Davydov gfp &= ~__GFP_ACCOUNT; 883e79ec7dSVladimir Davydov page = alloc_pages(gfp, 0); 899491846fSKirill A. Shutemov if (!page) 909491846fSKirill A. Shutemov return NULL; 919491846fSKirill A. Shutemov if (!pgtable_pmd_page_ctor(page)) { 929491846fSKirill A. Shutemov __free_pages(page, 0); 939491846fSKirill A. Shutemov return NULL; 949491846fSKirill A. Shutemov } 959491846fSKirill A. Shutemov return (pmd_t *)page_address(page); 96bb898558SAl Viro } 97bb898558SAl Viro 98bb898558SAl Viro static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) 99bb898558SAl Viro { 100bb898558SAl Viro BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); 1019491846fSKirill A. Shutemov pgtable_pmd_page_dtor(virt_to_page(pmd)); 102bb898558SAl Viro free_page((unsigned long)pmd); 103bb898558SAl Viro } 104bb898558SAl Viro 1059e1b32caSBenjamin Herrenschmidt extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd); 1069e1b32caSBenjamin Herrenschmidt 1079e1b32caSBenjamin Herrenschmidt static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, 108b595076aSUwe Kleine-König unsigned long address) 1099e1b32caSBenjamin Herrenschmidt { 1109e1b32caSBenjamin Herrenschmidt ___pmd_free_tlb(tlb, pmd); 1119e1b32caSBenjamin Herrenschmidt } 112bb898558SAl Viro 113bb898558SAl Viro #ifdef CONFIG_X86_PAE 114bb898558SAl Viro extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 115bb898558SAl Viro #else /* !CONFIG_X86_PAE */ 116bb898558SAl Viro static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 117bb898558SAl Viro { 118bb898558SAl Viro paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT); 119bb898558SAl Viro set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))); 120bb898558SAl Viro } 121bb898558SAl Viro #endif /* CONFIG_X86_PAE */ 122bb898558SAl Viro 12398233368SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS > 3 124f2a6a705SKirill A. Shutemov static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud) 125bb898558SAl Viro { 126bb898558SAl Viro paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT); 127f2a6a705SKirill A. Shutemov set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud))); 128bb898558SAl Viro } 129bb898558SAl Viro 130bb898558SAl Viro static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) 131bb898558SAl Viro { 1323e79ec7dSVladimir Davydov gfp_t gfp = GFP_KERNEL_ACCOUNT; 1333e79ec7dSVladimir Davydov 1343e79ec7dSVladimir Davydov if (mm == &init_mm) 1353e79ec7dSVladimir Davydov gfp &= ~__GFP_ACCOUNT; 1363e79ec7dSVladimir Davydov return (pud_t *)get_zeroed_page(gfp); 137bb898558SAl Viro } 138bb898558SAl Viro 139bb898558SAl Viro static inline void pud_free(struct mm_struct *mm, pud_t *pud) 140bb898558SAl Viro { 141bb898558SAl Viro BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); 142bb898558SAl Viro free_page((unsigned long)pud); 143bb898558SAl Viro } 144bb898558SAl Viro 1459e1b32caSBenjamin Herrenschmidt extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud); 1469e1b32caSBenjamin Herrenschmidt 1479e1b32caSBenjamin Herrenschmidt static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, 1489e1b32caSBenjamin Herrenschmidt unsigned long address) 1499e1b32caSBenjamin Herrenschmidt { 1509e1b32caSBenjamin Herrenschmidt ___pud_free_tlb(tlb, pud); 1519e1b32caSBenjamin Herrenschmidt } 1529e1b32caSBenjamin Herrenschmidt 153f2a6a705SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS > 4 154f2a6a705SKirill A. Shutemov static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d) 155f2a6a705SKirill A. Shutemov { 156f2a6a705SKirill A. Shutemov paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT); 157f2a6a705SKirill A. Shutemov set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d))); 158f2a6a705SKirill A. Shutemov } 159f2a6a705SKirill A. Shutemov 160f2a6a705SKirill A. Shutemov static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr) 161f2a6a705SKirill A. Shutemov { 162f2a6a705SKirill A. Shutemov gfp_t gfp = GFP_KERNEL_ACCOUNT; 163f2a6a705SKirill A. Shutemov 164f2a6a705SKirill A. Shutemov if (mm == &init_mm) 165f2a6a705SKirill A. Shutemov gfp &= ~__GFP_ACCOUNT; 166f2a6a705SKirill A. Shutemov return (p4d_t *)get_zeroed_page(gfp); 167f2a6a705SKirill A. Shutemov } 168f2a6a705SKirill A. Shutemov 169f2a6a705SKirill A. Shutemov static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d) 170f2a6a705SKirill A. Shutemov { 171f2a6a705SKirill A. Shutemov BUG_ON((unsigned long)p4d & (PAGE_SIZE-1)); 172f2a6a705SKirill A. Shutemov free_page((unsigned long)p4d); 173f2a6a705SKirill A. Shutemov } 174f2a6a705SKirill A. Shutemov 175f2a6a705SKirill A. Shutemov extern void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d); 176f2a6a705SKirill A. Shutemov 177f2a6a705SKirill A. Shutemov static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d, 178f2a6a705SKirill A. Shutemov unsigned long address) 179f2a6a705SKirill A. Shutemov { 180f2a6a705SKirill A. Shutemov ___p4d_free_tlb(tlb, p4d); 181f2a6a705SKirill A. Shutemov } 182f2a6a705SKirill A. Shutemov 183f2a6a705SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS > 4 */ 18498233368SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS > 3 */ 18598233368SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS > 2 */ 186bb898558SAl Viro 1871965aae3SH. Peter Anvin #endif /* _ASM_X86_PGALLOC_H */ 188