Now with pmd_cont() defined... --- Subject: arm64/mm: Implement pXX_leaf_size() support From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Date: Fri Nov 13 11:46:06 CET 2020 ARM64 has non-pagetable aligned large page support with PTE_CONT, when this bit is set the page is part of a super-page. Match the hugetlb code and support these super pages for PTE and PMD levels. This enables PERF_SAMPLE_{DATA,CODE}_PAGE_SIZE to report accurate pagetable leaf sizes. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> --- arch/arm64/include/asm/pgtable.h | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -407,6 +407,7 @@ static inline int pmd_trans_huge(pmd_t p #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_cont(pmd) pte_cont(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))) @@ -503,6 +504,9 @@ extern pgprot_t phys_mem_access_prot(str PMD_TYPE_SECT) #define pmd_leaf(pmd) pmd_sect(pmd) +#define pmd_leaf_size(pmd) (pmd_cont(pmd) ? CONT_PMD_SIZE : PMD_SIZE) +#define pte_leaf_size(pte) (pte_cont(pte) ? CONT_PTE_SIZE : PAGE_SIZE) + #if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS < 3 static inline bool pud_sect(pud_t pud) { return false; } static inline bool pud_table(pud_t pud) { return true; }