diff options
| author | Steve Capper <steve.capper@linaro.org> | 2014-05-06 17:02:27 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-05-09 19:10:58 +0400 |
| commit | 206a2a73a62d37c8b8f6ddd3180c202b2e7298ab (patch) | |
| tree | 0d62a75a3e29667792ee37e3c5aed14d1bc03303 /arch/arm64/include/asm/pgtable-hwdef.h | |
| parent | ba6bf8c85cb0d263ca9a98ef6a76ab651a97c60b (diff) | |
| download | linux-206a2a73a62d37c8b8f6ddd3180c202b2e7298ab.tar.xz | |
arm64: mm: Create gigabyte kernel logical mappings where possible
We have the capability to map 1GB level 1 blocks when using a 4K
granule.
This patch adjusts the create_mapping logic s.t. when mapping physical
memory on boot, we attempt to use a 1GB block if both the VA and PA
start and end are 1GB aligned. This both reduces the levels of lookup
required to resolve a kernel logical address, as well as reduces TLB
pressure on cores that support 1GB TLB entries.
Signed-off-by: Steve Capper <steve.capper@linaro.org>
Tested-by: Jungseok Lee <jays.lee@samsung.com>
[catalin.marinas@arm.com: s/prot_sect_kernel/PROT_SECT_NORMAL_EXEC/]
Signed-off-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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 5fc8a66c3924..955e8c5f0afb 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -29,6 +29,8 @@ */ #define PUD_TABLE_BIT (_AT(pgdval_t, 1) << 1) +#define PUD_TYPE_MASK (_AT(pgdval_t, 3) << 0) +#define PUD_TYPE_SECT (_AT(pgdval_t, 1) << 0) /* * Level 2 descriptor (PMD). |