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| author | Peter Zijlstra <peterz@infradead.org> | 2020-11-13 13:46:06 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-12-03 12:14:51 +0300 |
| commit | d55863db1dfec8845067f5625f1b0ab18c8948be (patch) | |
| tree | 4513c479833b60a7c90be07c3c724ce7f100f774 /arch/arm64 | |
| parent | 8af26be062721e52eba1550caf50b712f774c5fd (diff) | |
| download | linux-d55863db1dfec8845067f5625f1b0ab18c8948be.tar.xz | |
arm64/mm: Implement pXX_leaf_size() support
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@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20201126125747.GG2414@hirez.programming.kicks-ass.net
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 4ff12a7adcfd..c3b92a4503cf 100644 --- 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 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_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(struct file *file, unsigned long pfn, 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; } |