diff options
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
-rw-r--r-- | arch/arm64/include/asm/pgtable.h | 48 |
1 files changed, 41 insertions, 7 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 1bdeca8918a6..50b1ef8584c0 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -360,6 +360,7 @@ static inline int pmd_protnone(pmd_t pmd) #define pmd_present(pmd) pte_present(pmd_pte(pmd)) #define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd)) #define pmd_young(pmd) pte_young(pmd_pte(pmd)) +#define pmd_valid(pmd) pte_valid(pmd_pte(pmd)) #define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(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))) @@ -428,10 +429,33 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, PUD_TYPE_TABLE) #endif +extern pgd_t init_pg_dir[PTRS_PER_PGD]; +extern pgd_t init_pg_end[]; +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; +extern pgd_t idmap_pg_dir[PTRS_PER_PGD]; +extern pgd_t tramp_pg_dir[PTRS_PER_PGD]; + +extern void set_swapper_pgd(pgd_t *pgdp, pgd_t pgd); + +static inline bool in_swapper_pgdir(void *addr) +{ + return ((unsigned long)addr & PAGE_MASK) == + ((unsigned long)swapper_pg_dir & PAGE_MASK); +} + static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) { +#ifdef __PAGETABLE_PMD_FOLDED + if (in_swapper_pgdir(pmdp)) { + set_swapper_pgd((pgd_t *)pmdp, __pgd(pmd_val(pmd))); + return; + } +#endif /* __PAGETABLE_PMD_FOLDED */ + WRITE_ONCE(*pmdp, pmd); - dsb(ishst); + + if (pmd_valid(pmd)) + dsb(ishst); } static inline void pmd_clear(pmd_t *pmdp) @@ -477,11 +501,21 @@ static inline phys_addr_t pmd_page_paddr(pmd_t pmd) #define pud_none(pud) (!pud_val(pud)) #define pud_bad(pud) (!(pud_val(pud) & PUD_TABLE_BIT)) #define pud_present(pud) pte_present(pud_pte(pud)) +#define pud_valid(pud) pte_valid(pud_pte(pud)) static inline void set_pud(pud_t *pudp, pud_t pud) { +#ifdef __PAGETABLE_PUD_FOLDED + if (in_swapper_pgdir(pudp)) { + set_swapper_pgd((pgd_t *)pudp, __pgd(pud_val(pud))); + return; + } +#endif /* __PAGETABLE_PUD_FOLDED */ + WRITE_ONCE(*pudp, pud); - dsb(ishst); + + if (pud_valid(pud)) + dsb(ishst); } static inline void pud_clear(pud_t *pudp) @@ -532,6 +566,11 @@ static inline phys_addr_t pud_page_paddr(pud_t pud) static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) { + if (in_swapper_pgdir(pgdp)) { + set_swapper_pgd(pgdp, pgd); + return; + } + WRITE_ONCE(*pgdp, pgd); dsb(ishst); } @@ -712,11 +751,6 @@ static inline pmd_t pmdp_establish(struct vm_area_struct *vma, } #endif -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; -extern pgd_t swapper_pg_end[]; -extern pgd_t idmap_pg_dir[PTRS_PER_PGD]; -extern pgd_t tramp_pg_dir[PTRS_PER_PGD]; - /* * Encode and decode a swap entry: * bits 0-1: present (must be zero) |