diff options
Diffstat (limited to 'arch/arm64/include/asm/pgalloc.h')
| -rw-r--r-- | arch/arm64/include/asm/pgalloc.h | 103 |
1 files changed, 61 insertions, 42 deletions
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h index 172d76fa0245..8ff5f2a2579e 100644 --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -13,81 +13,102 @@ #include <asm/cacheflush.h> #include <asm/tlbflush.h> -#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ +#define __HAVE_ARCH_PGD_FREE +#define __HAVE_ARCH_PUD_FREE +#include <asm-generic/pgalloc.h> #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) #if CONFIG_PGTABLE_LEVELS > 2 -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) { - gfp_t gfp = GFP_PGTABLE_USER; - struct page *page; + set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot)); +} - if (mm == &init_mm) - gfp = GFP_PGTABLE_KERNEL; +static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) +{ + pudval_t pudval = PUD_TYPE_TABLE; - page = alloc_page(gfp); - if (!page) - return NULL; - if (!pgtable_pmd_page_ctor(page)) { - __free_page(page); - return NULL; - } - return page_address(page); + pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN; + __pud_populate(pudp, __pa(pmdp), pudval); } +#else +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) +{ + BUILD_BUG(); +} +#endif /* CONFIG_PGTABLE_LEVELS > 2 */ + +#if CONFIG_PGTABLE_LEVELS > 3 -static inline void pmd_free(struct mm_struct *mm, pmd_t *pmdp) +static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) { - BUG_ON((unsigned long)pmdp & (PAGE_SIZE-1)); - pgtable_pmd_page_dtor(virt_to_page(pmdp)); - free_page((unsigned long)pmdp); + if (pgtable_l4_enabled()) + set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot)); } -static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) +static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp) { - set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot)); + p4dval_t p4dval = P4D_TYPE_TABLE; + + p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN; + __p4d_populate(p4dp, __pa(pudp), p4dval); } -static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) +static inline void pud_free(struct mm_struct *mm, pud_t *pud) { - __pud_populate(pudp, __pa(pmdp), PMD_TYPE_TABLE); + if (!pgtable_l4_enabled()) + return; + __pud_free(mm, pud); } #else -static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) +static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) { BUILD_BUG(); } -#endif /* CONFIG_PGTABLE_LEVELS > 2 */ +#endif /* CONFIG_PGTABLE_LEVELS > 3 */ -#if CONFIG_PGTABLE_LEVELS > 3 +#if CONFIG_PGTABLE_LEVELS > 4 -static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot) { - return (pud_t *)__get_free_page(GFP_PGTABLE_USER); + if (pgtable_l5_enabled()) + set_pgd(pgdp, __pgd(__phys_to_pgd_val(p4dp) | prot)); } -static inline void pud_free(struct mm_struct *mm, pud_t *pudp) +static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, p4d_t *p4dp) { - BUG_ON((unsigned long)pudp & (PAGE_SIZE-1)); - free_page((unsigned long)pudp); + pgdval_t pgdval = PGD_TYPE_TABLE; + + pgdval |= (mm == &init_mm) ? PGD_TABLE_UXN : PGD_TABLE_PXN; + __pgd_populate(pgdp, __pa(p4dp), pgdval); } -static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pudp, pgdval_t prot) +static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr) { - set_pgd(pgdp, __pgd(__phys_to_pgd_val(pudp) | prot)); + gfp_t gfp = GFP_PGTABLE_USER; + + if (mm == &init_mm) + gfp = GFP_PGTABLE_KERNEL; + return (p4d_t *)get_zeroed_page(gfp); } -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, pud_t *pudp) +static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d) { - __pgd_populate(pgdp, __pa(pudp), PUD_TYPE_TABLE); + if (!pgtable_l5_enabled()) + return; + BUG_ON((unsigned long)p4d & (PAGE_SIZE-1)); + free_page((unsigned long)p4d); } + +#define __p4d_free_tlb(tlb, p4d, addr) p4d_free((tlb)->mm, p4d) #else -static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pudp, pgdval_t prot) +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot) { BUILD_BUG(); } -#endif /* CONFIG_PGTABLE_LEVELS > 3 */ +#endif /* CONFIG_PGTABLE_LEVELS > 4 */ extern pgd_t *pgd_alloc(struct mm_struct *mm); extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp); @@ -105,17 +126,15 @@ static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep, static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { - /* - * The pmd must be loaded with the physical address of the PTE table - */ - __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); + VM_BUG_ON(mm && mm != &init_mm); + __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE | PMD_TABLE_UXN); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) { - __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); + VM_BUG_ON(mm == &init_mm); + __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE | PMD_TABLE_PXN); } -#define pmd_pgtable(pmd) pmd_page(pmd) #endif |