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| author | Joey Gouly <joey.gouly@arm.com> | 2024-08-22 18:10:56 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-09-04 14:52:40 +0300 |
| commit | b66db4f3ccde2fe960ff2d7bb64fe8933e2db7b3 (patch) | |
| tree | 54ef013201c1ed0f8ceb101edf4edaf7e5c5c8fb | |
| parent | facaa1373c9aabf8e34109a9cb205ad0f3a8584e (diff) | |
| download | linux-b66db4f3ccde2fe960ff2d7bb64fe8933e2db7b3.tar.xz | |
arm64: add POIndex defines
The 3-bit POIndex is stored in the PTE at bits 60..62.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-14-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 1f60aa1bc750..3f0c3f5c5cef 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -200,6 +200,16 @@ #define PTE_PI_IDX_3 54 /* UXN */ /* + * POIndex[2:0] encoding (Permission Overlay Extension) + */ +#define PTE_PO_IDX_0 (_AT(pteval_t, 1) << 60) +#define PTE_PO_IDX_1 (_AT(pteval_t, 1) << 61) +#define PTE_PO_IDX_2 (_AT(pteval_t, 1) << 62) + +#define PTE_PO_IDX_MASK GENMASK_ULL(62, 60) + + +/* * Memory Attribute override for Stage-2 (MemAttr[3:0]) */ #define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2) |