| Message ID | 20230724-arm64-gcs-v2-25-dc2c1d44c2eb@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show
Return-Path: <linux-kselftest-owner@vger.kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
by smtp.lore.kernel.org (Postfix) with ESMTP id C6C0DC001DE
for <linux-kselftest@archiver.kernel.org>;
Mon, 24 Jul 2023 12:54:09 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
id S231508AbjGXMyF (ORCPT
<rfc822;linux-kselftest@archiver.kernel.org>);
Mon, 24 Jul 2023 08:54:05 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43972 "EHLO
lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
with ESMTP id S231695AbjGXMxO (ORCPT
<rfc822;linux-kselftest@vger.kernel.org>);
Mon, 24 Jul 2023 08:53:14 -0400
Received: from dfw.source.kernel.org (dfw.source.kernel.org
[IPv6:2604:1380:4641:c500::1])
by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9807844BD;
Mon, 24 Jul 2023 05:50:28 -0700 (PDT)
Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange X25519 server-signature RSA-PSS (2048 bits))
(No client certificate requested)
by dfw.source.kernel.org (Postfix) with ESMTPS id 937B861152;
Mon, 24 Jul 2023 12:49:39 +0000 (UTC)
Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38E35C433C9;
Mon, 24 Jul 2023 12:49:33 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;
s=k20201202; t=1690202979;
bh=H5XnWdFwxjuGxEH72kUlpbP8cfBTQj97MLlaTYR448U=;
h=From:Date:Subject:References:In-Reply-To:To:Cc:From;
b=UOuiRDkBusphHSxvKkLrOi4hb6QDNJiEeqdsk+bAiNRlkVULSMR4LyXqN6lh8jEqU
6aY+o5iGUOA6CFekoyYKLuLpmCp+ki3We97BjjOgf1TovklVWs1IesDN2/4ZJCIFfS
IKWq2s7SUCup5jqqhGVztCdgWGCi6H6vhnbavEeaeBK1/JuRYjJ9aPnPZUR/omR95F
rxly5mAwX/l/+1i7EX1ua9A7x1W/LZ+n23XWxRezK9rDiN3SJ1xWbA9wJnBHy88E8Y
vSfU0G78J8CFivTLw4aU6EPd8y37uIJOGTm2UJNJVqYpVChDBEi/Xr+hdmloQtpFzg
l5nGgTUqt5dhw==
From: Mark Brown <broonie@kernel.org>
Date: Mon, 24 Jul 2023 13:46:12 +0100
Subject: [PATCH v2 25/35] arm64: Add Kconfig for Guarded Control Stack
(GCS)
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Message-Id: <20230724-arm64-gcs-v2-25-dc2c1d44c2eb@kernel.org>
References: <20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org>
In-Reply-To: <20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Arnd Bergmann <arnd@arndb.de>, Oleg Nesterov <oleg@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Kees Cook <keescook@chromium.org>,
Shuah Khan <shuah@kernel.org>,
"Rick P. Edgecombe" <rick.p.edgecombe@intel.com>,
Deepak Gupta <debug@rivosinc.com>,
Ard Biesheuvel <ardb@kernel.org>,
Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, Mark Brown <broonie@kernel.org>
X-Mailer: b4 0.13-dev-099c9
X-Developer-Signature: v=1; a=openpgp-sha256; l=1334; i=broonie@kernel.org;
h=from:subject:message-id; bh=H5XnWdFwxjuGxEH72kUlpbP8cfBTQj97MLlaTYR448U=;
b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBkvnKnQmQDKgw1sV73XajzPOr/VVN8eYW4BuRVpTBw
6U/CDZaJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZL5ypwAKCRAk1otyXVSH0BjjB/
4zmlP2LuDl/tCz3VO/DUeOVn6ZcSaI/xa1REDMlzha0SDGdV+QTgnOm9wNwq8WieSsejDlPhxDuvki
paM4LrVSh1c5aAtMHMQ/HGCdvkCO5DgZgBqp71Vmbl6yz4Vi/gj0UfNJDOA3FLp9ww3m7Qe5H3UTpY
SJsdjSeveABSRymkrBiBwjX6uOxi1DtrtMVpatbk1zkkjp5TTaBE35yRGdsgVgA8ODTsqZP5OKTSN3
4HIlACNi9tjNEGYf4wzBTSKJAaxhrT3jJQH6jMsMwwyXhVvlMx9/aQLLuBXlSZcSRJyqVsR/kzRIxf
+bE7Fh1YOi9lG6dI2er5/PlgVCBoni
X-Developer-Key: i=broonie@kernel.org; a=openpgp;
fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB
Precedence: bulk
List-ID: <linux-kselftest.vger.kernel.org>
X-Mailing-List: linux-kselftest@vger.kernel.org
|
| Series |
arm64/gcs: Provide support for GCS in userspace
|
expand
|
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a2511b30d0f6..b5ef1a698770 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2093,6 +2093,25 @@ config ARM64_EPAN if the cpu does not implement the feature. endmenu # "ARMv8.7 architectural features" +menu "v9.4 architectural features" + +config ARM64_GCS + bool "Enable support for Guarded Control Stack (GCS)" + default y + select ARCH_USES_HIGH_VMA_FLAGS + help + Guarded Control Stack (GCS) provides support for a separate + stack with restricted access which contains only return + addresses. This can be used to harden against some attacks + by comparing return address used by the program with what is + stored in the GCS, and may also be used to efficiently obtain + the call stack for applications such as profiling. + + The feature is detected at runtime, and will remain disabled + if the system does not implement the feature. + +endmenu # "v9.4 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y
Provide a Kconfig option allowing the user to select if GCS support is built into the kernel. Signed-off-by: Mark Brown <broonie@kernel.org> --- arch/arm64/Kconfig | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)