From patchwork Fri May 3 13:01:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 13652771 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D1D0F153BE6 for ; Fri, 3 May 2024 13:03:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714741390; cv=none; b=BMWABdVfEtpmv2t+MfU0S6aar3oDmhD/RHoXU2KJmsPg4MGMDYSdGuCuTAarnlBmPrIU4BF5+W95ZwLeT25MlPW3Hpjh0f+sMo6DuZ7n5TPvBB9aOh6wACbnhgm9d3F619Ci82QPoChuaen5AUa8isIMkm4yGpojiXkU2Oi3uyI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714741390; c=relaxed/simple; bh=QL7Z2oX9KcDRABPheq8Sil8DiHxZ/oUCj/OkPUP/MPw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AR9Sq5mYqWTCgskdNFCmBpFfhPzOHqroukeIbzkqqnfmU777KtOO7FtqRvtjQON3gntYNgjvHFa3blTR8X41Dk7Gdo2zhd6Nxb58zlEUqOPD3pVgSr7i1FD2AWzhavI2LUxrZHHL5QOwyibu2r5OYF1mE8iWtf4FFi/mF5Bov1Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id BC8511713; Fri, 3 May 2024 06:03:33 -0700 (PDT) Received: from e124191.cambridge.arm.com (e124191.cambridge.arm.com [10.1.197.45]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6B5063F73F; 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> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 Acked-by: Catalin Marinas Reviewed-by: Anshuman Khandual --- 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