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: 13773857 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8E03BC52D7C for ; Thu, 22 Aug 2024 15:53:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=UpfNylgfxY4txd7ztue1Ar+iWBvQcIDs522zyFJSfc4=; b=gssZcx2zO0moC1Y+bb0u0U71f8 q0iiuN0T+Ql7YotYHFZwYFVt2e6j4yQFrFt/Pq/j2C80ZVD6FefPkhjvVMhv/dMNOqdA9g1arorJ8 /pzgk1RtW3hQh+j/igmnlDU8x2ParNUjf51H+71WkCACVyUWfZ7TtytuGt31ZzrCXBo+skTVDAXDb ZYedDevzx/Xiiv5WtMlPDo/rJM+dEKa0wsR45mD1Pm8Tf9tSTxptDyk62aHpZbZMfIGa75/0QORvw Zaf5AUVNciUu2OnKFkIrB0i+goU5sETsnpcRl+835fWsKyhqpsTaWpcRWNr0cDKUfO8hy5S/kLG65 KXysaZJA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1shA7b-0000000DQEE-20Af; Thu, 22 Aug 2024 15:53:11 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9Uq-0000000DIdo-3pSl for linux-arm-kernel@bombadil.infradead.org; Thu, 22 Aug 2024 15:13:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=UpfNylgfxY4txd7ztue1Ar+iWBvQcIDs522zyFJSfc4=; b=G8KOjAvkQIpv2Fjh0qwEYkzkCZ Fwcd/A45iP3dURQxWny9cSrQGUqOYxDVVdm5JB3LrCUwdrQR2vZ35nsBW6DFjS1mPTqTXa619BdxM YxwO+9vf4PSRczfzMvEaGik7o6HIP6WGeVjW+b/6QQ8P7+ypVfWJ7sVvqmjCMijWeJiih9KDOVQCl UWF9aslETTqMx3D+giBlLLmooNGlo7FeU3TgQTv6v3Qv42WPmkEK+ZjvI1p9x+t08kR8tvQbW/mql ETAnUpfTt+askC8F/Ye2r2Gxc4AdCoFaZpF9y9L7uMqKarLoOH1zO63P7Yglq7dljjDlG/cGjqUXz Rw/fPrEQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9Um-00000009ySn-2QyF for linux-arm-kernel@lists.infradead.org; Thu, 22 Aug 2024 15:13:07 +0000 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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240822_161305_730025_935DA47C X-CRM114-Status: UNSURE ( 8.40 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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