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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>
pull/955/head
Joey Gouly 2024-08-22 16:10:56 +01:00 committed by Will Deacon
parent facaa1373c
commit b66db4f3cc
1 changed files with 10 additions and 0 deletions
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10
arch/arm64/include/asm/pgtable-hwdef.h
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@ -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])
*/