From patchwork Thu Aug 22 15:11:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 1975615 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev+bounces-384-incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=patchwork.ozlabs.org) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4WqRZv4Nt5z1yXY for ; Fri, 23 Aug 2024 01:15:03 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4WqRYB6xP4z302N; Fri, 23 Aug 2024 01:13:34 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1724339614; cv=none; b=eyLqp5qZELvMejp9zuCBP/zeLyXcpKfjnIdsiEmv2C09GPA5jN+rNx136CmCW87P110E2k5PMEBHgu/Yu3P77bKiNDSJ0vMSU/v2vhv/lSqrV8DXjlrlcMdtvzutt0lKQwIDcryn3yS3D+jqsmX7OusDGcfmOBUreLPJfvlQNXZH62lypT82koUzjSj3OW1eV8f3RJmfDkcvqE+pJbCj5dUthj6IDzuVl6RO/2Lva4ovaCF18oYgk8NsWKphgKjeK1oipBlTtKGGbnAbpoBJ3hNK6YT79iZOpa/5wkWDOPI98l+zulZZGdQgOlCJ26wuB/4ZiPgyIRm9pfI5/cg4Xg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1724339614; c=relaxed/relaxed; bh=UpfNylgfxY4txd7ztue1Ar+iWBvQcIDs522zyFJSfc4=; h=Received:Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; b=ZStT0UjLe20un1WbKGlKy7rAp62iIhRJvkcKh9u2UpiYgaVU4NDptSOEI5t+fsEFg508digMPyTyfzmOxDUn/WKBpPUZRc5bjsQD/gIax6OuepfZkL+HqF/jwJLPXbwvWwcxHs9mDmbyoUhCZjoTDMWqgIuEmPxjOWJ2+MQv5m60D9P90JPNHftjvc+ebw/LL9X5zt8dpLD2RMPzwFweF//cOdiXvRVcmyTJVdP2vEhE36BkK0e1M/urWpvBc4mbavtrSRops0MltnDi/MIzu0GX0ag1DDJAsgp7FQphnBLwJRmMR7GQjb5xwCBPLYBrJQIKS7TfGn3gPjWiCsCPKQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=joey.gouly@arm.com; receiver=lists.ozlabs.org) smtp.mailfrom=arm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=joey.gouly@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4WqRYB5SkSz2ygX for ; Fri, 23 Aug 2024 01:13:34 +1000 (AEST) 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 D6BB01650; Thu, 22 Aug 2024 08:13:29 -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 B8D833F58B; Thu, 22 Aug 2024 08:12:59 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: nd@arm.com, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.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, skhan@linuxfoundation.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: [PATCH v5 23/30] arm64: add Permission Overlay Extension Kconfig Date: Thu, 22 Aug 2024 16:11:06 +0100 Message-Id: <20240822151113.1479789-24-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240822151113.1479789-1-joey.gouly@arm.com> References: <20240822151113.1479789-1-joey.gouly@arm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Post: 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 Reviewed-by: Anshuman Khandual Acked-by: Catalin Marinas --- arch/arm64/Kconfig | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git arch/arm64/Kconfig arch/arm64/Kconfig index a2f8ff354ca6..35dfc6275328 100644 --- arch/arm64/Kconfig +++ arch/arm64/Kconfig @@ -2137,6 +2137,29 @@ 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