diff options
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/mmu.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index e97f018ff740..66460c2074f6 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -97,7 +97,7 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, } EXPORT_SYMBOL(phys_mem_access_prot); -static phys_addr_t __init early_pgtable_alloc(void) +static phys_addr_t __init early_pgtable_alloc(int shift) { phys_addr_t phys; void *ptr; @@ -174,7 +174,7 @@ static void init_pte(pmd_t *pmdp, unsigned long addr, unsigned long end, static void alloc_init_cont_pte(pmd_t *pmdp, unsigned long addr, unsigned long end, phys_addr_t phys, pgprot_t prot, - phys_addr_t (*pgtable_alloc)(void), + phys_addr_t (*pgtable_alloc)(int), int flags) { unsigned long next; @@ -184,7 +184,7 @@ static void alloc_init_cont_pte(pmd_t *pmdp, unsigned long addr, if (pmd_none(pmd)) { phys_addr_t pte_phys; BUG_ON(!pgtable_alloc); - pte_phys = pgtable_alloc(); + pte_phys = pgtable_alloc(PAGE_SHIFT); __pmd_populate(pmdp, pte_phys, PMD_TYPE_TABLE); pmd = READ_ONCE(*pmdp); } @@ -208,7 +208,7 @@ static void alloc_init_cont_pte(pmd_t *pmdp, unsigned long addr, static void init_pmd(pud_t *pudp, unsigned long addr, unsigned long end, phys_addr_t phys, pgprot_t prot, - phys_addr_t (*pgtable_alloc)(void), int flags) + phys_addr_t (*pgtable_alloc)(int), int flags) { unsigned long next; pmd_t *pmdp; @@ -246,7 +246,7 @@ static void init_pmd(pud_t *pudp, unsigned long addr, unsigned long end, static void alloc_init_cont_pmd(pud_t *pudp, unsigned long addr, unsigned long end, phys_addr_t phys, pgprot_t prot, - phys_addr_t (*pgtable_alloc)(void), int flags) + phys_addr_t (*pgtable_alloc)(int), int flags) { unsigned long next; pud_t pud = READ_ONCE(*pudp); @@ -258,7 +258,7 @@ static void alloc_init_cont_pmd(pud_t *pudp, unsigned long addr, if (pud_none(pud)) { phys_addr_t pmd_phys; BUG_ON(!pgtable_alloc); - pmd_phys = pgtable_alloc(); + pmd_phys = pgtable_alloc(PMD_SHIFT); __pud_populate(pudp, pmd_phys, PUD_TYPE_TABLE); pud = READ_ONCE(*pudp); } @@ -294,7 +294,7 @@ static inline bool use_1G_block(unsigned long addr, unsigned long next, static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end, phys_addr_t phys, pgprot_t prot, - phys_addr_t (*pgtable_alloc)(void), + phys_addr_t (*pgtable_alloc)(int), int flags) { unsigned long next; @@ -304,7 +304,7 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end, if (pgd_none(pgd)) { phys_addr_t pud_phys; BUG_ON(!pgtable_alloc); - pud_phys = pgtable_alloc(); + pud_phys = pgtable_alloc(PUD_SHIFT); __pgd_populate(pgdp, pud_phys, PUD_TYPE_TABLE); pgd = READ_ONCE(*pgdp); } @@ -345,7 +345,7 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end, static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys, unsigned long virt, phys_addr_t size, pgprot_t prot, - phys_addr_t (*pgtable_alloc)(void), + phys_addr_t (*pgtable_alloc)(int), int flags) { unsigned long addr, length, end, next; @@ -371,11 +371,23 @@ static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys, } while (pgdp++, addr = next, addr != end); } -static phys_addr_t pgd_pgtable_alloc(void) +static phys_addr_t pgd_pgtable_alloc(int shift) { void *ptr = (void *)__get_free_page(PGALLOC_GFP); - if (!ptr || !pgtable_page_ctor(virt_to_page(ptr))) - BUG(); + BUG_ON(!ptr); + + /* + * Call proper page table ctor in case later we need to + * call core mm functions like apply_to_page_range() on + * this pre-allocated page table. + * + * We don't select ARCH_ENABLE_SPLIT_PMD_PTLOCK if pmd is + * folded, and if so pgtable_pmd_page_ctor() becomes nop. + */ + if (shift == PAGE_SHIFT) + BUG_ON(!pgtable_page_ctor(virt_to_page(ptr))); + else if (shift == PMD_SHIFT) + BUG_ON(!pgtable_pmd_page_ctor(virt_to_page(ptr))); /* Ensure the zeroed page is visible to the page table walker */ dsb(ishst); |