| Message ID | 20201126121121.102580109@infradead.org |
|---|---|
| State | Not Applicable |
| Delegated to: | David Miller |
| Headers | show |
| Series | perf/mm: Fix PERF_SAMPLE_*_PAGE_SIZE | expand |
On Thu, Nov 26, 2020 at 01:01:16PM +0100, Peter Zijlstra wrote: > 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>
--- 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 */
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> --- include/linux/pgtable.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)