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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT 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 63652C31E4B for ; Fri, 14 Jun 2019 13:13:03 +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 35D1320850 for ; Fri, 14 Jun 2019 13:13:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pMSz59pB"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="r9h4sOJw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35D1320850 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.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:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yAb8/87MfFut4XTxwPHmuLIPn1qkZ73vB/EBeF8hSlI=; b=pMSz59pBT7v2a4 J07DfqqicyfY4Yd9pPuho1dVSvd6vHVVLKBuMV5NWkQcTRH3FTt5uBjCLCh5JZQXvw/2LBbkzeiN2 yKCE7DUrQoBsJSB8l++FSFqmkt6cptcDzF1EsKZtzDm8ftVoCVYGLNw552/R8m0rfzd4wbFCD5R5F 0+xCA1ZM3xYrMDOt2MaswGEcdV3UjqPpqr6q15nOJSKp4wUH2HqDXcBELXClzGwNF3GxRmi8xvMHJ NQKtzOutq3qgZ2acyLbtzuAuf/ghOXoaOp14hJgOujf85JWwXf3dNgu/zMG1FrfhwxkmE9Yo8UMqJ l84y9SfMBmzvBdIkoQOQ==; 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 1hbm0o-0003o3-JD; Fri, 14 Jun 2019 13:12:58 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hbm0l-0003nY-IT for linux-arm-kernel@lists.infradead.org; Fri, 14 Jun 2019 13:12:56 +0000 Received: from localhost (173-25-83-245.client.mchsi.com [173.25.83.245]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EB86720850; Fri, 14 Jun 2019 13:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560517975; bh=s7zyuYWu+DaWGbyiuI6YfpVgY4YZ3vd5LpUoa4GAm24=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=r9h4sOJw4TWqwZ6Htg6I96ppoZEAiCpUG+mrI/LkdOC+aeRusUOZ91ISOH7nOaxks v84qfGmWQ3spRQq4sQZkPS4zIH+6rZ0Hk3zwxlLwcwsq9tDqzOkq2TxyU5I/yWY0ca D194xOv9xtvOVOfuHGBKAABDHW4XhR1kSTEvX90I= Date: Fri, 14 Jun 2019 08:12:53 -0500 From: Bjorn Helgaas To: Benjamin Herrenschmidt Subject: Re: [RFC PATCH v2] arm64: acpi/pci: invoke _DSM whether to preserve firmware PCI setup Message-ID: <20190614131253.GR13533@google.com> References: <5783e36561bb77a1deb6ba67e5a9824488cc69c6.camel@kernel.crashing.org> <20190613190248.GH13533@google.com> <20190614095742.GA27188@e121166-lin.cambridge.arm.com> <906b2576756e82a54b584c3de2d8362602de07ce.camel@kernel.crashing.org> <84320a45ef9395d82bf1c5d4d2d7e6db189cbfda.camel@kernel.crashing.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <84320a45ef9395d82bf1c5d4d2d7e6db189cbfda.camel@kernel.crashing.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190614_061255_627650_7EBB7EA9 X-CRM114-Status: UNSURE ( 8.36 ) 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: linux-pci , Lorenzo Pieralisi , Sinan Kaya , linux-arm-kernel , Ard Biesheuvel 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 Fri, Jun 14, 2019 at 08:43:19PM +1000, Benjamin Herrenschmidt wrote: > This least to another conversation we hinted at earlier.. we should > probably have a way to do the same at least for BARs on ACPI systems so > we don't have to temporarily disable access to a device to size them. The PCI Enhanced Allocation capability provides a way to do this. I don't know how widely used it is, but it's theoretically possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel