From mboxrd@z Thu Jan 1 00:00:00 1970 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 197DDC531DC for ; Fri, 16 Aug 2024 11:16:11 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5134E8D0072; Fri, 16 Aug 2024 07:16:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 49C2D8D0070; Fri, 16 Aug 2024 07:16:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 33CEE8D0072; Fri, 16 Aug 2024 07:16:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 114A38D0070 for ; Fri, 16 Aug 2024 07:16:10 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id C528B161A34 for ; Fri, 16 Aug 2024 11:16:09 +0000 (UTC) X-FDA: 82457854458.26.383BE41 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf22.hostedemail.com (Postfix) with ESMTP id 32F6BC0018 for ; Fri, 16 Aug 2024 11:16:08 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf22.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1723806954; a=rsa-sha256; cv=none; b=ECA5UVXemSYXgJoNMn72fn7MKufj0oIXTU88t5BmHGnHyk+Ast1ikA7n3pjq70ZtFl2up1 kMfw4fTZSv/X03IHQg+fL554WUkAFJjaMcn5IDh4tQAAVTTUqxeajrtiBJIerRdowVNd/q CjSEjrGyZDM2c8GCiUlJl1M1Fe/nQxc= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf22.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1723806954; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=icgybgU9MOCGJKTXIbQrRAy5rHPqqceA1X0SSBf9tNI=; b=v4O+5JTkKdGIJfMxgdggv+YjPOk+sl0DpBetn+5t2WARQaGYtLXG01CM7Hk1A9jYtuMfwz FEorwNfaSAa2NTGD8Meik9onpwdetIcSUE5hPVK7+wHG29p03BCB4TfxCgc3IEfZpjHd6d C70CrkyuP9f4gden2cL8kbK6Cb032S8= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 603ED61E00; Fri, 16 Aug 2024 11:16:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92FA9C32782; Fri, 16 Aug 2024 11:16:01 +0000 (UTC) Date: Fri, 16 Aug 2024 12:15:59 +0100 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , 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 Subject: Re: [PATCH v10 10/40] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) Message-ID: References: <20240801-arm64-gcs-v10-0-699e2bd2190b@kernel.org> <20240801-arm64-gcs-v10-10-699e2bd2190b@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240801-arm64-gcs-v10-10-699e2bd2190b@kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: 32F6BC0018 X-Rspamd-Server: rspam01 X-Stat-Signature: io8oh35qzpre8xtm5iozzimj7wxyegxg X-HE-Tag: 1723806968-984731 X-HE-Meta: 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 P+NfsdwE 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 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: On Thu, Aug 01, 2024 at 01:06:37PM +0100, Mark Brown wrote: > @@ -2870,6 +2872,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { > .matches = has_nv1, > ARM64_CPUID_FIELDS_NEG(ID_AA64MMFR4_EL1, E2H0, NI_NV1) > }, > + { > + .desc = "Guarded Control Stack (GCS)", > + .capability = ARM64_HAS_GCS, > + .type = ARM64_CPUCAP_SYSTEM_FEATURE, Given that it's for user space only, system feature makes sense. Reviewed-by: Catalin Marinas