diff options
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
-rw-r--r-- | arch/arm64/include/asm/pgtable.h | 134 |
1 files changed, 96 insertions, 38 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 67c2ad6d33b7..9a09ccf7122d 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -36,19 +36,13 @@ * * VMEMAP_SIZE: allows the whole linear region to be covered by a struct page array * (rounded up to PUD_SIZE). - * VMALLOC_START: beginning of the kernel VA space + * VMALLOC_START: beginning of the kernel vmalloc space * VMALLOC_END: extends to the available space below vmmemmap, PCI I/O space, * fixed mappings and modules */ #define VMEMMAP_SIZE ALIGN((1UL << (VA_BITS - PAGE_SHIFT)) * sizeof(struct page), PUD_SIZE) -#ifndef CONFIG_KASAN -#define VMALLOC_START (VA_START) -#else -#include <asm/kasan.h> -#define VMALLOC_START (KASAN_SHADOW_END + SZ_64K) -#endif - +#define VMALLOC_START (MODULES_END) #define VMALLOC_END (PAGE_OFFSET - PUD_SIZE - VMEMMAP_SIZE - SZ_64K) #define VMEMMAP_START (VMALLOC_END + SZ_64K) @@ -59,6 +53,7 @@ #ifndef __ASSEMBLY__ +#include <asm/fixmap.h> #include <linux/mmdebug.h> extern void __pte_error(const char *file, int line, unsigned long val); @@ -123,8 +118,8 @@ extern void __pgd_error(const char *file, int line, unsigned long val); * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. */ -extern struct page *empty_zero_page; -#define ZERO_PAGE(vaddr) (empty_zero_page) +extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; +#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page) #define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) @@ -136,16 +131,6 @@ extern struct page *empty_zero_page; #define pte_clear(mm,addr,ptep) set_pte(ptep, __pte(0)) #define pte_page(pte) (pfn_to_page(pte_pfn(pte))) -/* Find an entry in the third-level page table. */ -#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) - -#define pte_offset_kernel(dir,addr) (pmd_page_vaddr(*(dir)) + pte_index(addr)) - -#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) -#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr)) -#define pte_unmap(pte) do { } while (0) -#define pte_unmap_nested(pte) do { } while (0) - /* * The following only work if pte_present(). Undefined behaviour otherwise. */ @@ -168,6 +153,16 @@ extern struct page *empty_zero_page; #define pte_valid(pte) (!!(pte_val(pte) & PTE_VALID)) #define pte_valid_not_user(pte) \ ((pte_val(pte) & (PTE_VALID | PTE_USER)) == PTE_VALID) +#define pte_valid_young(pte) \ + ((pte_val(pte) & (PTE_VALID | PTE_AF)) == (PTE_VALID | PTE_AF)) + +/* + * Could the pte be present in the TLB? We must check mm_tlb_flush_pending + * so that we don't erroneously return false for pages that have been + * remapped as PROT_NONE but are yet to be flushed from the TLB. + */ +#define pte_accessible(mm, pte) \ + (mm_tlb_flush_pending(mm) ? pte_present(pte) : pte_valid_young(pte)) static inline pte_t clear_pte_bit(pte_t pte, pgprot_t prot) { @@ -218,7 +213,8 @@ static inline pte_t pte_mkspecial(pte_t pte) static inline pte_t pte_mkcont(pte_t pte) { - return set_pte_bit(pte, __pgprot(PTE_CONT)); + pte = set_pte_bit(pte, __pgprot(PTE_CONT)); + return set_pte_bit(pte, __pgprot(PTE_TYPE_PAGE)); } static inline pte_t pte_mknoncont(pte_t pte) @@ -226,6 +222,11 @@ static inline pte_t pte_mknoncont(pte_t pte) return clear_pte_bit(pte, __pgprot(PTE_CONT)); } +static inline pmd_t pmd_mkcont(pmd_t pmd) +{ + return __pmd(pmd_val(pmd) | PMD_SECT_CONT); +} + static inline void set_pte(pte_t *ptep, pte_t pte) { *ptep = pte; @@ -299,7 +300,7 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, /* * Hugetlb definitions. */ -#define HUGE_MAX_HSTATE 2 +#define HUGE_MAX_HSTATE 4 #define HPAGE_SHIFT PMD_SHIFT #define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) @@ -354,6 +355,7 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address, #define pmd_mksplitting(pmd) pte_pmd(pte_mkspecial(pmd_pte(pmd))) #define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd))) #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) +#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd))) #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) #define pmd_mknotpresent(pmd) (__pmd(pmd_val(pmd) & ~PMD_SECT_VALID)) @@ -425,13 +427,31 @@ static inline void pmd_clear(pmd_t *pmdp) set_pmd(pmdp, __pmd(0)); } -static inline pte_t *pmd_page_vaddr(pmd_t pmd) +static inline phys_addr_t pmd_page_paddr(pmd_t pmd) { - return __va(pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK); + return pmd_val(pmd) & PHYS_MASK & (s32)PAGE_MASK; } +/* Find an entry in the third-level page table. */ +#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) + +#define pte_offset_phys(dir,addr) (pmd_page_paddr(*(dir)) + pte_index(addr) * sizeof(pte_t)) +#define pte_offset_kernel(dir,addr) ((pte_t *)__va(pte_offset_phys((dir), (addr)))) + +#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr)) +#define pte_offset_map_nested(dir,addr) pte_offset_kernel((dir), (addr)) +#define pte_unmap(pte) do { } while (0) +#define pte_unmap_nested(pte) do { } while (0) + +#define pte_set_fixmap(addr) ((pte_t *)set_fixmap_offset(FIX_PTE, addr)) +#define pte_set_fixmap_offset(pmd, addr) pte_set_fixmap(pte_offset_phys(pmd, addr)) +#define pte_clear_fixmap() clear_fixmap(FIX_PTE) + #define pmd_page(pmd) pfn_to_page(__phys_to_pfn(pmd_val(pmd) & PHYS_MASK)) +/* use ONLY for statically allocated translation tables */ +#define pte_offset_kimg(dir,addr) ((pte_t *)__phys_to_kimg(pte_offset_phys((dir), (addr)))) + /* * Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. @@ -458,21 +478,37 @@ static inline void pud_clear(pud_t *pudp) set_pud(pudp, __pud(0)); } -static inline pmd_t *pud_page_vaddr(pud_t pud) +static inline phys_addr_t pud_page_paddr(pud_t pud) { - return __va(pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK); + return pud_val(pud) & PHYS_MASK & (s32)PAGE_MASK; } /* Find an entry in the second-level page table. */ #define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) -static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) -{ - return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr); -} +#define pmd_offset_phys(dir, addr) (pud_page_paddr(*(dir)) + pmd_index(addr) * sizeof(pmd_t)) +#define pmd_offset(dir, addr) ((pmd_t *)__va(pmd_offset_phys((dir), (addr)))) + +#define pmd_set_fixmap(addr) ((pmd_t *)set_fixmap_offset(FIX_PMD, addr)) +#define pmd_set_fixmap_offset(pud, addr) pmd_set_fixmap(pmd_offset_phys(pud, addr)) +#define pmd_clear_fixmap() clear_fixmap(FIX_PMD) #define pud_page(pud) pfn_to_page(__phys_to_pfn(pud_val(pud) & PHYS_MASK)) +/* use ONLY for statically allocated translation tables */ +#define pmd_offset_kimg(dir,addr) ((pmd_t *)__phys_to_kimg(pmd_offset_phys((dir), (addr)))) + +#else + +#define pud_page_paddr(pud) ({ BUILD_BUG(); 0; }) + +/* Match pmd_offset folding in <asm/generic/pgtable-nopmd.h> */ +#define pmd_set_fixmap(addr) NULL +#define pmd_set_fixmap_offset(pudp, addr) ((pmd_t *)pudp) +#define pmd_clear_fixmap() + +#define pmd_offset_kimg(dir,addr) ((pmd_t *)dir) + #endif /* CONFIG_PGTABLE_LEVELS > 2 */ #if CONFIG_PGTABLE_LEVELS > 3 @@ -494,21 +530,37 @@ static inline void pgd_clear(pgd_t *pgdp) set_pgd(pgdp, __pgd(0)); } -static inline pud_t *pgd_page_vaddr(pgd_t pgd) +static inline phys_addr_t pgd_page_paddr(pgd_t pgd) { - return __va(pgd_val(pgd) & PHYS_MASK & (s32)PAGE_MASK); + return pgd_val(pgd) & PHYS_MASK & (s32)PAGE_MASK; } /* Find an entry in the frst-level page table. */ #define pud_index(addr) (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) -static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr) -{ - return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(addr); -} +#define pud_offset_phys(dir, addr) (pgd_page_paddr(*(dir)) + pud_index(addr) * sizeof(pud_t)) +#define pud_offset(dir, addr) ((pud_t *)__va(pud_offset_phys((dir), (addr)))) + +#define pud_set_fixmap(addr) ((pud_t *)set_fixmap_offset(FIX_PUD, addr)) +#define pud_set_fixmap_offset(pgd, addr) pud_set_fixmap(pud_offset_phys(pgd, addr)) +#define pud_clear_fixmap() clear_fixmap(FIX_PUD) #define pgd_page(pgd) pfn_to_page(__phys_to_pfn(pgd_val(pgd) & PHYS_MASK)) +/* use ONLY for statically allocated translation tables */ +#define pud_offset_kimg(dir,addr) ((pud_t *)__phys_to_kimg(pud_offset_phys((dir), (addr)))) + +#else + +#define pgd_page_paddr(pgd) ({ BUILD_BUG(); 0;}) + +/* Match pud_offset folding in <asm/generic/pgtable-nopud.h> */ +#define pud_set_fixmap(addr) NULL +#define pud_set_fixmap_offset(pgdp, addr) ((pud_t *)pgdp) +#define pud_clear_fixmap() + +#define pud_offset_kimg(dir,addr) ((pud_t *)dir) + #endif /* CONFIG_PGTABLE_LEVELS > 3 */ #define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) @@ -516,11 +568,16 @@ static inline pud_t *pud_offset(pgd_t *pgd, unsigned long addr) /* to find an entry in a page-table-directory */ #define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) -#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr)) +#define pgd_offset_raw(pgd, addr) ((pgd) + pgd_index(addr)) + +#define pgd_offset(mm, addr) (pgd_offset_raw((mm)->pgd, (addr))) /* to find an entry in a kernel page-table-directory */ #define pgd_offset_k(addr) pgd_offset(&init_mm, addr) +#define pgd_set_fixmap(addr) ((pgd_t *)set_fixmap_offset(FIX_PGD, addr)) +#define pgd_clear_fixmap() clear_fixmap(FIX_PGD) + static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY | @@ -681,7 +738,8 @@ extern int kern_addr_valid(unsigned long addr); #include <asm-generic/pgtable.h> -#define pgtable_cache_init() do { } while (0) +void pgd_cache_init(void); +#define pgtable_cache_init pgd_cache_init /* * On AArch64, the cache coherency is handled via the set_pte_at() function. |