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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5026EC43441 for ; Mon, 19 Nov 2018 18:26:44 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 C2E53206BA for ; Mon, 19 Nov 2018 18:26:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="wm5rkxyt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C2E53206BA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42zHNd4qnWzF3JC for ; Tue, 20 Nov 2018 05:26:41 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="wm5rkxyt"; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=okaya@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="wm5rkxyt"; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42zHKr07T8zF3CR for ; Tue, 20 Nov 2018 05:24:15 +1100 (AEDT) Received: from [10.80.45.159] (unknown [71.69.156.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2E660206BA; Mon, 19 Nov 2018 18:24:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542651853; bh=yV1rVaw923ctrstMXbWZZ47ohaFBqDXftmwGiCTdyAs=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=wm5rkxytxQVbBIHJa7Hu/UEjjET/nRxEbTBWTA39BWYCCvCO6ejODh5CaQX5T6GrQ 2ic5zZvoxLMYdHOtCFsE+HXbvb2L7bALfYbFB4++z8+1Zfl3zDbCIYKcjD8GurGM6Y UEVD4rxgq9KuJl055h532kSsM/W+FOWy3DY0gQGI= Subject: Re: [PATCH 0/2] PCI/AER: Consistently use _OSC to determine who owns AER To: Keith Busch References: <20181115231605.24352-1-mr.nuke.me@gmail.com> <20181119165318.GB26595@localhost.localdomain> <74f2c527-0890-5e14-5e2d-48934a42dae6@kernel.org> <20181119174127.GE26595@localhost.localdomain> <20181119181051.GA26707@localhost.localdomain> From: Sinan Kaya Message-ID: Date: Mon, 19 Nov 2018 13:24:11 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: <20181119181051.GA26707@localhost.localdomain> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alex_gagniuc@dellteam.com, Tyler Baicar , sbobroff@linux.ibm.com, linux-pci@vger.kernel.org, Shyam_Iyer@dell.com, rjw@rjwysocki.net, Linux Kernel Mailing List , linux-acpi@vger.kernel.org, lukas@wunner.de, oohall@gmail.com, mr.nuke.me@gmail.com, bhelgaas@google.com, austin_bolen@dell.com, linuxppc-dev@lists.ozlabs.org, lenb@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 11/19/2018 1:10 PM, Keith Busch wrote: >> We can't really turn off firmware first in the kernel without asking help >> from the firmware. > The _OSC method this patch utilizes is the ACPI spec defined way for > the kernel to wrest control from firmware. BIOS specific menu settings > shouldn't be our only recourse when we have a spec authority defining > generic OS interfaces to accomplish the same thing. > > Unless there is a disagreement on the _OSC interpreation, we'd have to > accept that platforms breaking from this patch are non-compliant. > It depends on which spec you look :) UEFI HEST table specification also claims that it should be the ultimate table for when PCI firmware-first should be disabled/enabled. I think somebody needs to fix these. I saw an email from Harb Abdulhamid sent to aswg this morning. That's why I suggested circulating this idea in UEFI forums first. Let's see what everybody thinks. We can go from there.