| Message ID | 20230927140123.5283-9-joey.gouly@arm.com |
|---|---|
| State | Superseded |
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From: Joey Gouly <joey.gouly@arm.com>
To: <linux-arm-kernel@lists.infradead.org>
CC: <nd@arm.com>, <akpm@linux-foundation.org>,
<aneesh.kumar@linux.ibm.com>, <catalin.marinas@arm.com>,
<dave.hansen@linux.intel.com>, <joey.gouly@arm.com>,
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<linux-kselftest@vger.kernel.org>
Subject: [PATCH v1 08/20] arm64: add POIndex defines
Date: Wed, 27 Sep 2023 15:01:11 +0100
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| Series |
Permission Overlay Extension
|
expand
|
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index e4944d517c99..fe270fa39110 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -178,6 +178,16 @@ #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]) */
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> --- arch/arm64/include/asm/pgtable-hwdef.h | 10 ++++++++++ 1 file changed, 10 insertions(+)