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=-1.0 required=3.0 tests=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 7AF44C04AB5 for ; Tue, 4 Jun 2019 03:38:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 503772454A for ; Tue, 4 Jun 2019 03:38:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726269AbfFDDiE (ORCPT ); Mon, 3 Jun 2019 23:38:04 -0400 Received: from gate.crashing.org ([63.228.1.57]:34384 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726136AbfFDDiE (ORCPT ); Mon, 3 Jun 2019 23:38:04 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x543bnxo024939; Mon, 3 Jun 2019 22:37:50 -0500 Message-ID: Subject: Re: [RFC] ARM64 PCI resource survey issue(s) From: Benjamin Herrenschmidt To: Bjorn Helgaas Cc: Ard Biesheuvel , Sinan Kaya , Lorenzo Pieralisi , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Zilberman, Zeev" , "Saidi, Ali" Date: Tue, 04 Jun 2019 13:37:49 +1000 In-Reply-To: <960c94eb151ba1d066090774621cf6ca6566d135.camel@kernel.crashing.org> References: <56715377f941f1953be43b488c2203ec090079a1.camel@kernel.crashing.org> <20190604014945.GE189360@google.com> <960c94eb151ba1d066090774621cf6ca6566d135.camel@kernel.crashing.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Tue, 2019-06-04 at 13:32 +1000, Benjamin Herrenschmidt wrote: > > > Of course, _DSM *can* be higher, e.g., at the host bridge, but then we > > lose the information about what specifically must be immutable, and > > that means the OS cannot ever move *anything*, even if it becomes > > capable of moving things around to accommodate hot-added devices. > > Well, in our case at least this is a non-issue, we don't want the OS to > move anything or change anything and there is no hotplug. Correction: There is hotplug in the leaf ports, but the FW will have setup the switch with enough space already. Cheers, Ben. 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=-1.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED 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 1D540C28CC6 for ; Tue, 4 Jun 2019 03:38:07 +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 EB86F2454A for ; Tue, 4 Jun 2019 03:38:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="arh/PSHm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EB86F2454A 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=7OGG4duwcf7TPg3hhP9h6u8aaf4d/zGLY5OrBnXTgaY=; b=arh/PSHmfJmUv2 223DuvOlAvfJSHbpLiElArqNMWht6CPAcy1eXz1xBy1QKUrOKRMT8wAnVXb8mmK+fXo1nWB92KrG6 Kfmn3h65eqp+ml5o8o11dRDYSVseURsMxHNbwckFulwvuLCuPtpvsJ1xh8Pgl/dqF2XPkU0jBVW/Z nbgFCo84YAbeRlY2AKG87W8TwV+7CLGkD5d7YinnHxo8O24cz+SZh+4hxIgvPeusx2j0QoqPnwmY4 G8tNWEDYkbitNOJGMxZYGwFwB6F2kdvM67HetZ83n4PvG8JwuYeeoQYYVrIclEDs+tx4cf+W6BMj6 6eLmvfDg3cezzffp4nFw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hY0Gz-0004sy-08; Tue, 04 Jun 2019 03:38:05 +0000 Received: from gate.crashing.org ([63.228.1.57]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hY0Gw-0004sD-9a for linux-arm-kernel@lists.infradead.org; Tue, 04 Jun 2019 03:38:03 +0000 Received: from localhost (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x543bnxo024939; Mon, 3 Jun 2019 22:37:50 -0500 Message-ID: Subject: Re: [RFC] ARM64 PCI resource survey issue(s) From: Benjamin Herrenschmidt To: Bjorn Helgaas Date: Tue, 04 Jun 2019 13:37:49 +1000 In-Reply-To: <960c94eb151ba1d066090774621cf6ca6566d135.camel@kernel.crashing.org> References: <56715377f941f1953be43b488c2203ec090079a1.camel@kernel.crashing.org> <20190604014945.GE189360@google.com> <960c94eb151ba1d066090774621cf6ca6566d135.camel@kernel.crashing.org> 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-20190603_203802_485343_BFA84C40 X-CRM114-Status: UNSURE ( 8.31 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 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" , "Saidi, Ali" , linux-arm-kernel@lists.infradead.org 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 Tue, 2019-06-04 at 13:32 +1000, Benjamin Herrenschmidt wrote: > > > Of course, _DSM *can* be higher, e.g., at the host bridge, but then we > > lose the information about what specifically must be immutable, and > > that means the OS cannot ever move *anything*, even if it becomes > > capable of moving things around to accommodate hot-added devices. > > Well, in our case at least this is a non-issue, we don't want the OS to > move anything or change anything and there is no hotplug. Correction: There is hotplug in the leaf ports, but the FW will have setup the switch with enough space already. Cheers, Ben. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel