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Fri, 3 May 2024 06:02:32 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, joey.gouly@arm.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev Subject: [PATCH v4 12/29] arm64: add POIndex defines Date: Fri, 3 May 2024 14:01:30 +0100 Message-Id: <20240503130147.1154804-13-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240503130147.1154804-1-joey.gouly@arm.com> References: <20240503130147.1154804-1-joey.gouly@arm.com> MIME-Version: 1.0 X-Rspamd-Server: rspam01 X-Stat-Signature: 6fpgn1sn8jqm974p7dhx4aqycbt6ie49 X-Rspam-User: X-Rspamd-Queue-Id: 062A8140047 X-HE-Tag: 1714741355-847078 X-HE-Meta: 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 O+/nAfbj trYPAtJH+k7otWnk1+c4hyZ8WXrzQ0X7vKZz7OaOyWZnfEBo4s1VWUNJvFQefoolPsiRFByPSyVSc74RYiGcWTUQrquM1a8o5Jd80CAuiDUyAn/WXLkaSTtrgzC1nWy316CjNf/j3i/GtQntgaICTjVWajZN/MuZkmNHpDYsJQV/jOP29hltPp7W+kfvqa0fkjSy2NrsEAlEpap7/V02EUFgmnQ== 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 ef207a0d4f0d..370a02922fe1 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -198,6 +198,16 @@ #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]) */