diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-15 10:25:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-29 13:37:58 +0100 |
| commit | 89d6fff0747f50dfef8460527f74d296cc6cb7dc (patch) | |
| tree | 1c3041427cbdda5df9abca0b30dfc2853b480500 | |
| parent | ba38c3e788384aa7210340f9c54eceab00c3b31c (diff) | |
mm: introduce mm_[p4d|pud|pmd]_folded
[ Upstream commit 1071fc5779d9846fec56a4ff6089ab08cac1ab72 ]
Add three architecture overrideable functions to test if the
p4d, pud, or pmd layer of a page table is folded or not.
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | include/asm-generic/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 88ebc6102c7c..15fd0277ffa6 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1127,4 +1127,20 @@ static inline bool arch_has_pfn_modify_check(void) #endif #endif +/* + * On some architectures it depends on the mm if the p4d/pud or pmd + * layer of the page table hierarchy is folded or not. + */ +#ifndef mm_p4d_folded +#define mm_p4d_folded(mm) __is_defined(__PAGETABLE_P4D_FOLDED) +#endif + +#ifndef mm_pud_folded +#define mm_pud_folded(mm) __is_defined(__PAGETABLE_PUD_FOLDED) +#endif + +#ifndef mm_pmd_folded +#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ |