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 13266C3DA4A for ; Fri, 16 Aug 2024 11:13:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A19A48D006E; Fri, 16 Aug 2024 07:13:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9CA5F8D0062; Fri, 16 Aug 2024 07:13:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8922E8D006E; Fri, 16 Aug 2024 07:13:37 -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 625748D0062 for ; Fri, 16 Aug 2024 07:13:37 -0400 (EDT) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 15B27A1969 for ; Fri, 16 Aug 2024 11:13:37 +0000 (UTC) X-FDA: 82457848074.04.68628BC Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf20.hostedemail.com (Postfix) with ESMTP id 7DC5A1C001D for ; Fri, 16 Aug 2024 11:13:35 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf20.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=1723806733; 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=MyxwdneHZ0eWP3on+jTOBJG35x2g10p/HsvHkckSzUw=; b=ftuE7A7iasXtUj8NJz0ycrdgm1LMkjNAaN887rgGLeYkzLaa1MeO9lS7HqD1gwJX+ThqcL TrySZhOEvX8hHFKydAMv5T/QlLIh9/cYL8oWbcmdBAOKVkl4F6axEZLjxxDCoPrcYJmgw0 5KOt4mQdI+bNzyJ8SlIn7IgErZ3K3+Q= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1723806733; a=rsa-sha256; cv=none; b=fcgciFwTNfDva02RvtlaauF+rNORcflboO71itucNZGc8SIOhJ88HRdrvsLDsN3JL54zbd T2+9twM6wPaGjex/ChxANQB650UAVpHhemC5oClQh/LX0Q5MiuYTXXtDLpFpsyFNlwGqRh pYuvzzvILrjTccmPEF2vvOC1fJZNC1E= ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf20.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id A45E661E01; Fri, 16 Aug 2024 11:13:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0B2CEC32782; Fri, 16 Aug 2024 11:13:28 +0000 (UTC) Date: Fri, 16 Aug 2024 12:13:27 +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 09/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 Message-ID: References: <20240801-arm64-gcs-v10-0-699e2bd2190b@kernel.org> <20240801-arm64-gcs-v10-9-699e2bd2190b@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240801-arm64-gcs-v10-9-699e2bd2190b@kernel.org> X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 7DC5A1C001D X-Stat-Signature: upqft8hgkghap8t9gbtte69pugg4nzwr X-Rspam-User: X-HE-Tag: 1723806815-845575 X-HE-Meta: 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 WCp4E9ka HN9x8Q22wPiDd/S1jGicfE2jIHfkwjMgCZP16ZytB41IN/btdgvPBGAYknaYaEp33EKIrSda6gFPid+y/ug2Q5sfcoFWVVxESpFVu7ZvqO7Eaying5R9v5nz/rtP4oVAMJDB8dV9P+Fy0x4RIFyuqvbizy8Fx7tZrx2STCwZ+XQy7Plyed3ecb9Vzii60WPmqbCNtdo05YLgt14DeOnVVxlho34IoVm2kfyQW7dghwOFCslc9D9H4n/RnweMEeVMI5VCBLz5KOtSyfldxEpFasn1gbX4WMLSvNp1O7YsNo3hBlFz34oX+M/giYDi7oEaxieXeZjWLNebyyAfisaZoVW9yseUlpWI7ZzpEcGdtllf66ZoKCxXdg346M637DFKp+K0RjTPMZngx87oqi+4f4BduF5mD/6xLfTh4H8qz3z0updKH48LaNMK1C1RrvlpPP7OhV3YJQJSDZl78ok1nS7t4hM6Dyb6Xwk6XqsuIqHyDml4FigyEyoqrFzVOTe3bVwndknhg3cwCbbPKkzvhMVYy5JEQ3iZ3v6Hl 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 01:06:36PM +0100, Mark Brown wrote: > There is a control HCRX_EL2.GCSEn which must be set to allow GCS > features to take effect at lower ELs and also fine grained traps for GCS > usage at EL0 and EL1. Configure all these to allow GCS usage by EL0 and > EL1. > > We also initialise GCSCR_EL1 and GCSCRE0_EL1 to ensure that we can > execute function call instructions without faulting regardless of the > state when the kernel is started. > > Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas