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=-0.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=ham 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 9DD09C31E46 for ; Wed, 12 Jun 2019 23:59:04 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 6640620874 for ; Wed, 12 Jun 2019 23:59:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sD7EvF3s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6640620874 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Mime-Version:References:In-Reply-To: Date:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xEKqYX2J5+DcvzynTEISZ9x9liOyEXmOA84CzMe688Y=; b=sD7EvF3sEIBoOr v66CObru5d/QBWiIcYx4WUy/05GlBkMQfwJ1TZF8MaY3q+To8JWfpe6iFbj5VBONG+l1oD+eIxCfn VJxlyadLhFZGn2kvwEmb2mF8sbso2j3oaR2luw8rbbDt9KpuvZBn2T8VvSwGwqw0sU0rw9jU7b91G NGZqhyuL/Iefl/0iJw4WSl8oxgSFQQWqN9brpUYqMQcJ5dt25ytSB9s4s2pIKkDksDCygyxyn/ozw JnC8AIXUxu8uRBKTdsGlc18xX5Mcb8FuSHv8nnR0gJ9T8qpYW3sI5AsEAgFAeQsxRo/4mdgD8oFXH yz8KRvxZEmoqy3cl4Ymw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbD8b-0003lW-FG; Wed, 12 Jun 2019 23:58:41 +0000 Received: from gate.crashing.org ([63.228.1.57]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hbD8Y-0003l5-0l for linux-arm-kernel@lists.infradead.org; Wed, 12 Jun 2019 23:58:39 +0000 Received: from localhost (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x5CNwO9h016775; Wed, 12 Jun 2019 18:58:25 -0500 Message-ID: <4ba4cc02ef0a30705fded5f2a66965c1f0f1b8ab.camel@kernel.crashing.org> Subject: Re: [PATCH/RESEND] arm64: acpi/pci: invoke _DSM whether to preserve firmware PCI setup From: Benjamin Herrenschmidt To: Bjorn Helgaas Date: Thu, 13 Jun 2019 09:58:24 +1000 In-Reply-To: <20190612132730.GB13533@google.com> References: <56715377f941f1953be43b488c2203ec090079a1.camel@kernel.crashing.org> <20190604014945.GE189360@google.com> <960c94eb151ba1d066090774621cf6ca6566d135.camel@kernel.crashing.org> <20190604124959.GF189360@google.com> <20190611233908.GA13533@google.com> <97fd2516fdde7f9f01688af426c103806f68dd2c.camel@kernel.crashing.org> <20190612132730.GB13533@google.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190612_165838_212715_48A1FA87 X-CRM114-Status: UNSURE ( 5.28 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Ard Biesheuvel , linux-pci@vger.kernel.org, Sinan Kaya , "Zilberman, Zeev" , linux-arm-kernel@lists.infradead.org, "Saidi, Ali" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 2019-06-12 at 08:27 -0500, Bjorn Helgaas wrote: > Speaking of which, *this* patch looks like FUD because it essentially > says "Linux shouldn't change the PCI configuration on this system" but > it offers no explanation of *why* the config needs to be preserved. I > would really like some note like "run-time firmware depends on the > addresses of device X". BTW. the patch doesn't say that. ACPI tells us that :-) Cheers Ben. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel