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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 3F188C5519F for ; Wed, 18 Nov 2020 13:06:16 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 8E4312225E for ; Wed, 18 Nov 2020 13:06:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="OpB3mwS9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E4312225E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39142 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kfNA6-0003ae-8Z for qemu-devel@archiver.kernel.org; Wed, 18 Nov 2020 08:06:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58982) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kfN8U-0002eZ-2u for qemu-devel@nongnu.org; Wed, 18 Nov 2020 08:04:34 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:34966) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kfN8Q-0008J9-UE for qemu-devel@nongnu.org; Wed, 18 Nov 2020 08:04:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605704669; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=x9jEQSxjPxyEqypE45C7Gkmxhmn8Nxw2eK+BQ6NQYJo=; b=OpB3mwS9GzRg03LXCJd2rgxDGrkdY3xg9xBpbhHSujEQWhLOB223EO+J9eUzc48PC8MIDu fhn1w+IdvnZdPu0PnUT/mcd6OTbpn3OqvogzVrpcX5mXin4vkZoMILTGfY362OpVfsyYEi pYswa5Dg2dZoATyG56MvQP5/VB3YPa4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-517-HPHI3XkaPg-aNBxu7xGovQ-1; Wed, 18 Nov 2020 08:04:24 -0500 X-MC-Unique: HPHI3XkaPg-aNBxu7xGovQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E13B9186DD40; Wed, 18 Nov 2020 13:04:20 +0000 (UTC) Received: from [10.36.114.231] (ovpn-114-231.ams2.redhat.com [10.36.114.231]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8B4876B8E1; Wed, 18 Nov 2020 13:04:01 +0000 (UTC) Subject: Re: [PATCH PROTOTYPE 3/6] vfio: Implement support for sparse RAM memory regions To: Peter Xu References: <20200924160423.106747-1-david@redhat.com> <20200924160423.106747-4-david@redhat.com> <20201020194434.GD200400@xz-x1> <14aaf9f1-9aa4-3a6b-ff25-8a4c7e29c2a6@redhat.com> <20201020204443.GE200400@xz-x1> From: David Hildenbrand Organization: Red Hat GmbH Message-ID: Date: Wed, 18 Nov 2020 14:04:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20201020204443.GE200400@xz-x1> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=david@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=david@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/18 00:38:29 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Le Tan , Pankaj Gupta , "Michael S. Tsirkin" , wei.huang2@amd.com, qemu-devel@nongnu.org, Luiz Capitulino , Auger Eric , Alex Williamson , Wei Yang , Igor Mammedov , Paolo Bonzini , "Dr . David Alan Gilbert" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20.10.20 22:44, Peter Xu wrote: > On Tue, Oct 20, 2020 at 10:01:12PM +0200, David Hildenbrand wrote: >> Thanks ... but I have an AMD system. Will try to find out how to get >> that running with AMD :) > > May still start with trying intel-iommu first. :) I think it should work for > amd hosts too. > > Just another FYI - Wei is working on amd-iommu for vfio [1], but it's still > during review. > > [1] https://lore.kernel.org/qemu-devel/20201002145907.1294353-1-wei.huang2@amd.com/ > I'm trying to get an iommu setup running (without virtio-mem!), but it's a big mess. Essential parts of my QEMU cmdline are: sudo build/qemu-system-x86_64 \ -accel kvm,kernel-irqchip=split \ ... device pcie-pci-bridge,addr=1e.0,id=pci.1 \ -device vfio-pci,host=0c:00.0,x-vga=on,bus=pci.1,addr=1.0,multifunction=on \ -device vfio-pci,host=0c:00.1,bus=pci.1,addr=1.1 \ -device intel-iommu,caching-mode=on,intremap=on \ I am running upstream QEMU + Linux -next kernel inside the guest on an AMD Ryzen 9 3900X 12-Core Processor. I am using SeaBios. I tried faking an Intel CPU without luck. ("-cpu Skylake-Client,kvm=off,vendor=GenuineIntel") As soon as I enable "intel_iommu=on" in my guest kernel, graphics stop working (random mess on graphics output) and I get vfio-pci 0000:0c:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0023 address=0xff924000 flags=0x0000] in the hypervisor, along with other nice messages. I can spot no vfio DMA mappings coming from an iommu, just as if the guest wouldn't even try to setup the iommu. I tried with 1. AMD Radeon RX Vega 56 2. Nvidia GT220 resulting in similar issues. I also tried with "-device amd-iommu" with other issues (guest won't even boot up). Are my graphics card missing some support or is there a fundamental flaw in my setup? Any clues appreciated. -- Thanks, David / dhildenb