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Fri, 3 May 2024 06:03:05 -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 22/29] arm64: add Permission Overlay Extension Kconfig Date: Fri, 3 May 2024 14:01:40 +0100 Message-Id: <20240503130147.1154804-23-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-Rspam-User: X-Stat-Signature: o8jnajgdtqai1kk4fywgm7iogixgiryi X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 2376714003F X-HE-Tag: 1714741388-39603 X-HE-Meta: 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 7PatgDQE Qe9KqOPumengSU7N5nyeIaOkK7nNjx58s2p7pRnEjYMIGRF9TLSgQgpR0BVUgHf/Z+7zaX0ZzijLqBZmsDZq2+1fAgeY8hIsaLcKYj9MkKvN5/PcKaBhyYBx+jMj5FjJeWCZ7rENRIoyZCqP3s5Cuo1MHoMGR1DqgHK21jzAGhUYFatp2L1toGniSgezNOWzS7QZNNrnqFc+8LQtPlx92U3wKRg== 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: Now that support for POE and Protection Keys has been implemented, add a config to allow users to actually enable it. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/Kconfig | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 7b11c98b3e84..676ebe4bf9eb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2095,6 +2095,28 @@ config ARM64_EPAN if the cpu does not implement the feature. endmenu # "ARMv8.7 architectural features" +menu "ARMv8.9 architectural features" +config ARM64_POE + prompt "Permission Overlay Extension" + def_bool y + select ARCH_USES_HIGH_VMA_FLAGS + select ARCH_HAS_PKEYS + help + The Permission Overlay Extension is used to implement Memory + Protection Keys. Memory Protection Keys provides a mechanism for + enforcing page-based protections, but without requiring modification + of the page tables when an application changes protection domains. + + For details, see Documentation/core-api/protection-keys.rst + + If unsure, say y. + +config ARCH_PKEY_BITS + int + default 3 + +endmenu # "ARMv8.9 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y