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 39B22C282DE for ; Thu, 13 Mar 2025 09:24:05 +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=5BOaPEmcXuC9xBEt+6eCVxYLChasBkkNpNHBWVGWTPU=; b=Zw7feeXX1rHikHwzWRJY+iQo3O 0pWsHkAk7UEbb8UjwsuQ0n71Bx2tOQZaVf0rHWM/xPZgzSqa81it/Fxg+4huZiN0wdl75S+/cu+0A dq/l0kTtYRacPsM0owwFxP2MHHl9sqiwWcyPi+9NimCoo8VtrfqsuzB6i5U6+NKT6w20RorGJSXkE ZDyZMKWmf1K7+YdS9zTzWnJZvOoZjIsGfjRlYL9HmIVwebpxTLdKOYGA/gHqCMkVl0XTvYvtBi02B xHtQWyZxv6QxFQmMTsCqMaiOSTRu//dy4inPKPoGn3LNrBmtWmf9EnM7uq+cBOfTiBJnjOPIL2qij H7x/4ibw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tsenD-0000000AipG-0bjV; Thu, 13 Mar 2025 09:23:55 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tselY-0000000AidS-0APT for linux-arm-kernel@lists.infradead.org; Thu, 13 Mar 2025 09:22:13 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 03584A46560; Thu, 13 Mar 2025 09:16:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7841AC4CEDD; Thu, 13 Mar 2025 09:22:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741857730; bh=XdeBR9m2VcWibmHMg21PFruzKcPhd6Kz1ihDbhRx1+8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=S6ycttKaj8HlLgujdPMi7HuQ/lFKLXctTcF257z79AJiDZhpfcPUL5Fdd7D+vNdBo emSXOgg4dsbkaYpn8S9yvLOzx71SQNtMGUzOD+n1MNcmrhfpiDvXUP2AXiYCHnOJBS 47mt4/n2QZgxfMxDDQSJjFhkcrpOur4F5asxRKw0/x2y3FP3qcPRwpwXA+fT1mHZUm HOKj95rJCtMZePnRecOo1/y2uFf4APTRM+qupkJVWvCnFEBPBy1QD4+Ox71jIbKwXT /O7bHRxeBmR7/LqkDvaKdj+9MtQTIOXA/XjxTilqfiaLHr5v/OXTGe3B6m5mos5Oy/ Dea2kH5aOsxxQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.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 1tselT-00D8gc-HC; Thu, 13 Mar 2025 09:22:07 +0000 Date: Thu, 13 Mar 2025 09:22:07 +0000 Message-ID: <86msdpnv40.wl-maz@kernel.org> From: Marc Zyngier To: Vijay Balakrishna Cc: Sascha Hauer , linux-edac@vger.kernel.org, Borislav Petkov , Mauro Carvalho Chehab , Tony Luck , James Morse , Robert Richter , York Sun , kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, Rob Herring , Mark Rutland Subject: Re: [PATCH v5 0/2] Add L1 and L2 error detection for A53 and A57 In-Reply-To: References: <20210401110615.15326-1-s.hauer@pengutronix.de> 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 (aarch64-unknown-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: 185.219.108.64 X-SA-Exim-Rcpt-To: vijayb@linux.microsoft.com, s.hauer@pengutronix.de, linux-edac@vger.kernel.org, bp@alien8.de, mchehab@kernel.org, tony.luck@intel.com, james.morse@arm.com, rrichter@marvell.com, york.sun@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, robh+dt@kernel.org, mark.rutland@arm.com 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-20250313_022212_142835_111ABE79 X-CRM114-Status: GOOD ( 18.09 ) 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 Thu, 13 Mar 2025 01:43:55 +0000, Vijay Balakrishna wrote: > > On 4/1/2021 4:06 AM, Sascha Hauer wrote: > > Hi, > > > > Resending this mainly because Marc Zyngier and Mark Rutland raised > > concerns about using implementation defined registers and I forgot to Cc > > them with the last version. This version, like v4 already, should fix > > these concerns. Looking forward to feedback. > > We aim to revive and adapt this patch series for A72 and A78. Is > anyone actively working on this? Please share any information on why > it wasn't pursued and thoughts on adapting it to A72 and A78. Because, and especially for less ancient CPUs such as A78 that implement some form of FEAT_RAS support, this makes little sense. We fully expect RAS errors to be handled by firmware, which knows exactly the cache topology and can abstract the reporting into error records. Firmware is also the correct place for all this IMPDEF stuff. M. -- Without deviation from the norm, progress is not possible.