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| author | Peter Zijlstra <peterz@infradead.org> | 2020-10-09 12:09:27 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-10-29 13:00:39 +0300 |
| commit | 51b646b2d9f84d6ff6300e3c1d09f2be4329a424 (patch) | |
| tree | a8c9b6bded7c1358f87cbc0f582eb6c653791818 /include/linux/perf_event.h | |
| parent | 995f088efebe1eba0282a6ffa12411b37f8990c2 (diff) | |
| download | linux-51b646b2d9f84d6ff6300e3c1d09f2be4329a424.tar.xz | |
perf,mm: Handle non-page-table-aligned hugetlbfs
A limited nunmber of architectures support hugetlbfs sizes that do not
align with the page-tables (ARM64, Power, Sparc64). Add support for
this to the generic perf_get_page_size() implementation, and also
allow an architecture to override this implementation.
This latter is only needed when it uses non-page-table aligned huge
pages in its kernel map.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index e533b03af053..0defb526cd0c 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1590,4 +1590,8 @@ extern void __weak arch_perf_update_userpage(struct perf_event *event, struct perf_event_mmap_page *userpg, u64 now); +#ifdef CONFIG_MMU +extern __weak u64 arch_perf_get_page_size(struct mm_struct *mm, unsigned long addr); +#endif + #endif /* _LINUX_PERF_EVENT_H */ |