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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D545BC433FE for ; Thu, 21 Oct 2021 17:11:34 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 78D7761A65 for ; Thu, 21 Oct 2021 17:11:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 78D7761A65 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linuxfoundation.org Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 42820407CE; Thu, 21 Oct 2021 17:11:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id oqadNLuIxEXg; Thu, 21 Oct 2021 17:11:33 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTPS id 53BB340411; Thu, 21 Oct 2021 17:11:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 339E8C0033; Thu, 21 Oct 2021 17:11:33 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 703D4C0011 for ; Thu, 21 Oct 2021 17:11:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 6C6C26065D for ; Thu, 21 Oct 2021 17:11:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp3.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=kernel.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id i-_x0KKs25vA for ; Thu, 21 Oct 2021 17:11:32 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp3.osuosl.org (Postfix) with ESMTPS id 07A43605F2 for ; Thu, 21 Oct 2021 17:11:31 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 4352461A0A; Thu, 21 Oct 2021 17:11:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634836291; bh=Q03u5Qex8eKAItP0Dg2YZHdrmPOdGUpwH80kTAfzZxI=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=Td5mGM7w14Slx9FIzv7BOb28GJoHrB9ns/c4MS4UE5lQCExsNbqqBd7gbnQBfGK6d wCxieyrBp59hT2zKHPX6adnJws0vsRC9Sz+bubNuDJ6BlWOBOwuh6OWp92vMmSALXk ET8S21c0NbukPIMV1IoLs4s0V9meVjRT+WnoP5VUEHnqTr3J8/jQQRxcEAAym2TPR9 YK+2Mxgf1DT4IBJEH8GBr8iGvsGquy5OFgog5NihLEVIZHqbw9WvybbrpeL0RXJ7cm csOEwYACYrD8Q33ogHm2srHLkyKi5Z1cLiH/+8dNAXVEDbUINAVTuB6JcJ3iBZTlBX C2fA8AKo22srQ== Date: Thu, 21 Oct 2021 12:11:30 -0500 From: Bjorn Helgaas To: Naveen Naidu Subject: Re: [PATCH v4 5/8] PCI/DPC: Converge EDR and DPC Path of clearing AER registers Message-ID: <20211021171130.GA2701430@bhelgaas> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211021165330.lcqajtwej4s7oadt@theprophet> Cc: Oza Pawandeep , linux-pci@vger.kernel.org, Sinan Kaya , linux-kernel@vger.kernel.org, Keith Busch , oohall@gmail.com, ruscur@russell.cc, bhelgaas@google.com, linuxppc-dev@lists.ozlabs.org, linux-kernel-mentees@lists.linuxfoundation.org X-BeenThere: linux-kernel-mentees@lists.linuxfoundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-kernel-mentees-bounces@lists.linuxfoundation.org Sender: "Linux-kernel-mentees" On Thu, Oct 21, 2021 at 10:23:30PM +0530, Naveen Naidu wrote: > On 20/10, Bjorn Helgaas wrote: > > On Tue, Oct 05, 2021 at 10:48:12PM +0530, Naveen Naidu wrote: > > > In EDR path, AER status registers are cleared irrespective of whether > > > the error was an RP PIO or unmasked uncorrectable error. But in DPC, the > > > AER status registers are cleared only when it's an unmasked uncorrectable > > > error. > > > > > > This leads to two different behaviours for the same task (handling of > > > DPC errors) in FFS systems and when native OS has control. > > > > FFS? > > Firmware First Systems I assumed that's what it was, but it's helpful to use the same terms used by the specs to make things easier to find. I don't think it's actually the case that "Firmware First" necessary applies to the entire system, since the ACPI FIRMWARE_FIRST flag is a per-error source thing, not a per-system thing. _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees