The following commit has been merged into the perf/core branch of tip: Commit-ID: 560dabbdf68bb15f9e241af8f828b1c8c38d6c6f Gitweb: https://git.kernel.org/tip/560dabbdf68bb15f9e241af8f828b1c8c38d6c6f Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Fri, 13 Nov 2020 11:45:36 +01:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Thu, 03 Dec 2020 10:14:50 +01:00 mm: Introduce pXX_leaf_size() A number of architectures have non-pagetable aligned huge/large pages. For such architectures a leaf can actually be part of a larger entry. Provide generic helpers to determine the size of a page-table leaf. Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/20201126121121.102580109@xxxxxxxxxxxxx --- include/linux/pgtable.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index ed9266c..fefbbdb 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -1536,4 +1536,20 @@ typedef unsigned int pgtbl_mod_mask; #define pmd_leaf(x) 0 #endif +#ifndef pgd_leaf_size +#define pgd_leaf_size(x) (1ULL << PGDIR_SHIFT) +#endif +#ifndef p4d_leaf_size +#define p4d_leaf_size(x) P4D_SIZE +#endif +#ifndef pud_leaf_size +#define pud_leaf_size(x) PUD_SIZE +#endif +#ifndef pmd_leaf_size +#define pmd_leaf_size(x) PMD_SIZE +#endif +#ifndef pte_leaf_size +#define pte_leaf_size(x) PAGE_SIZE +#endif + #endif /* _LINUX_PGTABLE_H */
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