arm64/mm: Implement pXX_leaf_size() support

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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

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Peter Zijlstra 2020-11-13 11:46:06 +01:00

parent 8af26be062

commit d55863db1d

1 changed files with 4 additions and 0 deletions

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arch/arm64/include/asm/pgtable.h

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