The 3-bit POIndex is stored in the PTE at bits 60..62. Signed-off-by: Joey Gouly <joey.gouly@xxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> --- arch/arm64/include/asm/pgtable-hwdef.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git arch/arm64/include/asm/pgtable-hwdef.h arch/arm64/include/asm/pgtable-hwdef.h index 1f60aa1bc750..3f0c3f5c5cef 100644 --- arch/arm64/include/asm/pgtable-hwdef.h +++ arch/arm64/include/asm/pgtable-hwdef.h @@ -199,6 +199,16 @@ #define PTE_PI_IDX_2 53 /* PXN */ #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]) */ -- 2.25.1
