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authorSteve Capper <steve.capper@linaro.org>2013-04-19 16:23:57 +0100
committerSteve Capper <steve.capper@linaro.org>2013-06-14 09:52:41 +0100
commitaf07484863e0c20796081e57093886c22dc16705 (patch)
treec9891c1048f860413c7cfd79e2b7a686c8be0263 /arch/arm64/include/asm/pgtable-hwdef.h
parentd03bb1455f3a2804539ed27047fd3b073fdeb3e0 (diff)
downloadlinux-for-next/hugepages.tar.gz
ARM64: mm: THP support.for-next/hugepages
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.h4
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 e6e0a0d4cf9..63c9d0de05b 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)