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| author | Steve Capper <steve.capper@linaro.org> | 2013-04-19 16:23:57 +0100 |
|---|---|---|
| committer | Steve Capper <steve.capper@linaro.org> | 2013-06-14 09:52:41 +0100 |
| commit | af07484863e0c20796081e57093886c22dc16705 (patch) | |
| tree | c9891c1048f860413c7cfd79e2b7a686c8be0263 /arch/arm64/include/asm/pgtable-hwdef.h | |
| parent | d03bb1455f3a2804539ed27047fd3b073fdeb3e0 (diff) | |
| download | linux-af07484863e0c20796081e57093886c22dc16705.tar.bz2 | |
ARM64: mm: THP support.
Bring Transparent HugePage support to ARM. The size of a
transparent huge page depends on the normal page size. A
transparent huge page is always represented as a pmd.
If PAGE_SIZE is 4KB, THPs are 2MB.
If PAGE_SIZE is 64KB, THPs are 512MB.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable-hwdef.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index e6e0a0d4cf9a..63c9d0de05bb 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -42,6 +42,10 @@ /* * Section */ +#define PMD_SECT_VALID (_AT(pmdval_t, 1) << 0) +#define PMD_SECT_PROT_NONE (_AT(pmdval_t, 1) << 2) +#define PMD_SECT_USER (_AT(pmdval_t, 1) << 6) /* AP[1] */ +#define PMD_SECT_RDONLY (_AT(pmdval_t, 1) << 7) /* AP[2] */ #define PMD_SECT_S (_AT(pmdval_t, 3) << 8) #define PMD_SECT_AF (_AT(pmdval_t, 1) << 10) #define PMD_SECT_NG (_AT(pmdval_t, 1) << 11) |