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Fri, 27 Oct 2023 11:09:21 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, broonie@kernel.org, catalin.marinas@arm.com, dave.hansen@linux.intel.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, shuah@kernel.org, will@kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, James Morse , Suzuki K Poulose , Zenghui Yu Subject: [PATCH v2 08/24] arm64: add POIndex defines Date: Fri, 27 Oct 2023 19:08:34 +0100 Message-Id: <20231027180850.1068089-9-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231027180850.1068089-1-joey.gouly@arm.com> References: <20231027180850.1068089-1-joey.gouly@arm.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 668FFA0004 X-Rspam-User: X-Stat-Signature: eajypep68uxoez9r9ou5gt3xrmna7mmk X-Rspamd-Server: rspam03 X-HE-Tag: 1698430164-851894 X-HE-Meta: U2FsdGVkX1+76VJLkpCRT/w4QiTQC5ba+kbi87I9Uk5ArGPY06d+oMk3PfLtBxu0dH/vK7kInsiOwBSBkUToQceZjsIsZzVPNG3WPbt3xU6hSckIZDytBp1oUzWIolge8sMkLbI6RVlA//p+ru48qFE8lllPH5flU6Cld6jWdwFAwlgE9Mn2k+GulbFetDIsJzmI4CDZ1Sl9zwpO6Ml6GWDwtZKmWnVqMDU//UgkDzkAafTrJ0QqO2pfRmQQD1IBAi9i7G/Xnhur4v5i6UC0QmRzX7ItqzLBTa3/nWZvCT89ahIJXgre4kZiSuieuCWrdmhlnzJ1kZEQexsbuGwaSgXfSVskiLS4vUqG4vU2bTR1UcmJIqUO17Ka4l2Hw+jEkl4g/KBkx6fPvZyw5VCmSB8eF/J7U8M9D8RlZgb5qoAF38ag5Y+PGkyj04IndpcsPEXZmuGobkhth1FN6PBJInIlqJ1CUncgICMs0t6KXPc7UTgCiM12/ILKHvtGAPomaNW6ZFCRFf3jD4ImgqjL6LtVk2zsQb2dobxCUXDLfrjZzEGqUflmDXPYI0bZ6wj6pkiMVQkLo/2jaGorzkLoCiU/tJH5qoWQaB9mwPfdHTmFiVPAsj884PqNGN4cxgZm6KwP9s9jijBLQPrZ0R17/pbnbo4sqiBqL5CVT6Kxzit1gX2tn8J1HmZBO6sP4bLT1Mu1sAwouj16slf1YRwf1LsSfuXMX1g4QOhb/n4hy5p+Uvek0mKQJleVQ3ooQGfVLasjwk/zl/9COSgGBs44XCmDGpdOW+U0Y7fKt8TzAnPibAbQNeimY0Y8Kyvs68jP7gxRZbemGOvLPXaUiuTOr06zTffEm/dltHoJ5/eFgdJNJyGc/SDmyQJ/T8gLBfQbv4noVt+uEH+c52aDAqaYnjEgKJDXwQzrgU3OdkpLJoPu3fzHSaFOw1HaXk9QKglkYOgH3kifQpizFYLIaBL yu8HYMPA K5HN7rWVxsKJTarnLfGirkAwcu5Zy39LBtCoz45nv2ZjZpPrhklKF7tDgWXgiCrnspkoWt+L/YLuoUcSPIQUTFM8Si0FC/GsyINYezhsR4P2pSnxi3+VifO7oCLqVnkDnCxBkFpuwQcumF9/FzUoxJN4A2eGU+bNBUtK6wPx4Ew7dooUSmjvpUmOg1b8aCx0PlzWxvkKzbzWWd6DwMd3stQ7Bhw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The 3-bit POIndex is stored in the PTE at bits 60..62. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/pgtable-hwdef.h | 10 ++++++++++ 1 file changed, 10 insertions(+) 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]) */