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| author | Ard Biesheuvel <ardb@kernel.org> | 2021-03-10 13:49:40 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-03-19 21:47:15 +0300 |
| commit | c1fd78a77704318de34ba4b780cd99a5ef96d162 (patch) | |
| tree | afca95cd036effc91b6fc80ef0b7fa50e21d46d7 /arch/arm64/include/asm/pgtable-hwdef.h | |
| parent | 1e28eed17697bcf343c6743f0028cc3b5dd88bf0 (diff) | |
| download | linux-c1fd78a77704318de34ba4b780cd99a5ef96d162.tar.xz | |
arm64: mm: add missing P4D definitions and use them consistently
Even though level 0, 1 and 2 descriptors share the same attribute
encodings, let's be a bit more consistent about using the right one at
the right level. So add new macros for level 0/P4D definitions, and
clean up some inconsistencies involving these macros.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210310104942.174584-2-ardb@kernel.org
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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 42442a0ae2ab..e64e77a345b2 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -94,6 +94,15 @@ /* * Hardware page table definitions. * + * Level 0 descriptor (P4D). + */ +#define P4D_TYPE_TABLE (_AT(p4dval_t, 3) << 0) +#define P4D_TABLE_BIT (_AT(p4dval_t, 1) << 1) +#define P4D_TYPE_MASK (_AT(p4dval_t, 3) << 0) +#define P4D_TYPE_SECT (_AT(p4dval_t, 1) << 0) +#define P4D_SECT_RDONLY (_AT(p4dval_t, 1) << 7) /* AP[2] */ + +/* * Level 1 descriptor (PUD). */ #define PUD_TYPE_TABLE (_AT(pudval_t, 3) << 0) |