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 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 0971FC0218D for ; Tue, 28 Jan 2025 08:48:32 +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-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=C/tac2qmgHZzKQZ9+rHZW9FaUtPR8Jg8XfgSsE06H+w=; b=uG2euagFN5LlswpFFeV04WGw3M xMMFyMuybLqH5oBsHShezDVRQSR2VGmaKdP45U+FOGZmnrwh/LbsqRrvm1OICegydLCjjxpzoQXaW +2ZbT7wtTby49GZ3piHAx3g+CPAi6JGzPyF75yQ4GWLzYOmp15M9yC784RgsvJFeNyd4Zc0ABoYyy TYlG2vaXybGFhgIUTP8Pf7L2G/DQzYTGEh/DGqlziXCVaY9D64Wip+Ujptpg88W2nfNWWW2jyRtCi M8QBskJ7Td78k8yNgUWNs28cTI1DChYWUevZmNIDcJp3hKx9l0IK/fE3RMcnGxcDURzbrfUkr2WY2 eG80V0QQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tchGc-00000004QU0-1E8n; Tue, 28 Jan 2025 08:48:18 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tchFG-00000004QH4-0DwO for linux-arm-kernel@lists.infradead.org; Tue, 28 Jan 2025 08:46:55 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 365DA5C564E; Tue, 28 Jan 2025 08:46:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F41DCC4CEE2; Tue, 28 Jan 2025 08:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738054013; bh=NIaz5G/YTf25Ttjt+0raODscJ3FM7qyN7v0o8c7XgZQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=AB7UVHu81b10Z0wUWZ1IIrwljei30sZmzzxVZOIyiW9mlKqpCTPKFjX4zJJ9LAHch Of22JI+hNBufiNRDvlFUtxW4IL/rcLV5iiXoOpQ1BPIUhmcE1ZCI5T8f4cmksVeGZr lSTKgOnWXCEFdRHwx1OhDVtXtmPOPKqnCXwHWOEdWQ//J9cMEnukfyGqWf9GXDcB4e cUStfBTKlNDoW3MOxnnJ2Yq4b+abhgpXDmXgxlQqE7BqCi169yHE8PjSter4jwjuyz 7MkM73kyA/8y5Y9zE6wl+XhApA9LsjclObu7utHlhAJ8ZTSceJLHnvJIuJw10hCwO5 sEk2DknZ71qfw== Received: from 82-132-233-27.dab.02.net ([82.132.233.27] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tchFC-00FzcD-DD; Tue, 28 Jan 2025 08:46:50 +0000 Date: Tue, 28 Jan 2025 08:46:48 +0000 Message-ID: <87jzaftjev.wl-maz@kernel.org> From: Marc Zyngier To: Oliver Upton Cc: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Hanjun Guo , Sudeep Holla , Will Deacon , Catalin Marinas , Lorenzo Pieralisi , Zheng Zengkai , stable@vger.kernel.org Subject: Re: [PATCH] ACPI: GTDT: Relax sanity checking on Platform Timers array count In-Reply-To: <20250128001749.3132656-1-oliver.upton@linux.dev> References: <20250128001749.3132656-1-oliver.upton@linux.dev> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 82.132.233.27 X-SA-Exim-Rcpt-To: oliver.upton@linux.dev, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, guohanjun@huawei.com, sudeep.holla@arm.com, will@kernel.org, catalin.marinas@arm.com, lpieralisi@kernel.org, zhengzengkai@huawei.com, stable@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250128_004654_137737_F73DE31E X-CRM114-Status: GOOD ( 14.43 ) 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 On Tue, 28 Jan 2025 00:17:49 +0000, Oliver Upton wrote: > > Perhaps unsurprisingly there are some platforms where the GTDT isn't > quite right and the Platforms Timer array overflows the length of the > overall table. Colour me shocked! Broken ACPI tables? [insert REM song here]. > > While the recently-added sanity checking isn't wrong, it makes it > impossible to boot the kernel on offending platforms. Try to hobble > along and limit the Platform Timer count to the bounds of the table. > > Cc: Marc Zyngier > Cc: Lorenzo Pieralisi > Cc: Zheng Zengkai > Cc: stable@vger.kernel.org > Fixes: 263e22d6bd1f ("ACPI: GTDT: Tighten the check for the array of platform timer structures") > Signed-off-by: Oliver Upton Acked-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.