diff options
author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-15 10:25:57 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 19:42:28 +0200 |
commit | 90b8693b9e40a88525bce5cc819f5dafe1bf9c54 (patch) | |
tree | e70283d4d2ed76c2cc89364628d8c6e0a534f855 /include/asm-generic | |
parent | b66f198bf30853d7efd2e4fc34cefd9ab8f09a38 (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 <alexander.levin@microsoft.com>
Diffstat (limited to 'include/asm-generic')
-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 f00421dfacbd..0c21014a38f2 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1081,4 +1081,20 @@ 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 */ |