Commit b66db4f3 authored by Joey Gouly's avatar Joey Gouly Committed by Will Deacon
Browse files

arm64: add POIndex defines 



The 3-bit POIndex is stored in the PTE at bits 60..62.

Signed-off-by: default avatarJoey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-14-joey.gouly@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent facaa137

arch/arm64/include/asm/pgtable-hwdef.h

+10 −0
Original line number Diff line number Diff line
@@ -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])

 */