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| author | Peter Zijlstra <peterz@infradead.org> | 2020-11-13 13:45:36 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-12-03 12:14:50 +0300 |
| commit | 560dabbdf68bb15f9e241af8f828b1c8c38d6c6f (patch) | |
| tree | 4ba7e4ceb4370c9242791161b88c01d6afc1e880 /include/linux/pgtable.h | |
| parent | 2a4a06da8a4b93dd189171eed7a99fffd38f42f3 (diff) | |
| download | linux-560dabbdf68bb15f9e241af8f828b1c8c38d6c6f.tar.xz | |
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@infradead.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lkml.kernel.org/r/20201126121121.102580109@infradead.org
Diffstat (limited to 'include/linux/pgtable.h')
| -rw-r--r-- | include/linux/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index ed9266cc115b..fefbbdbbb3f3 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 */ |