From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Wolf Subject: Re: vga passthrough // questions about pci passthrough Date: Wed, 18 Jul 2012 14:08:13 +0200 Message-ID: <5006A72D.3080408@adiumentum.com> References: <50064D87.2090809@adiumentum.com> <50068134.4060306@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Jan Kiszka Return-path: Received: from mail.andre-duewel.de ([178.63.55.43]:33961 "EHLO mail.andre-duewel.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754199Ab2GRMIW (ORCPT ); Wed, 18 Jul 2012 08:08:22 -0400 In-Reply-To: <50068134.4060306@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: On 18.07.2012 11:26, Jan Kiszka wrote: > On 2012-07-18 07:45, Martin Wolf wrote: >> Hello, >> >> i was able to passthrough an AMD 7870 videocard to my win7 guest machine. > Would you add it to http://www.linux-kvm.org/page/VGA_device_assignment? sure, i will prepare something > >> my host is ubuntu 12.04 with stock kernel. >> my system contains: >> dq67sw q67 mainboard >> i5-2400s cpu >> sapphire 7870 amd videocard >> xonar d2x (problems to passthrough) >> >> for full functionality i just needed two options >> >> - kernel : iommu=on >> - kvm module: ignore_msrs=1 >> (if i would not set it the guest os would crash with a bluescreen) > Can you report (=> kernel log) which MSRs are unknown to KVM? Jul 18 14:03:33 kvm-xen kernel: [ 437.309931] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.522724] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.522733] kvm: 3347: cpu1 ignored rdmsr: 0x1c9 Jul 18 14:03:33 kvm-xen kernel: [ 437.522736] kvm: 3347: cpu1 ignored rdmsr: 0x60 Jul 18 14:03:33 kvm-xen kernel: [ 437.522752] kvm: 3347: cpu1 ignored rdmsr: 0x1c9 Jul 18 14:03:33 kvm-xen kernel: [ 437.522755] kvm: 3347: cpu1 ignored rdmsr: 0x60 Jul 18 14:03:33 kvm-xen kernel: [ 437.522821] kvm: 3347: cpu1 ignored rdmsr: 0x1c9 Jul 18 14:03:33 kvm-xen kernel: [ 437.522823] kvm: 3347: cpu1 ignored rdmsr: 0x60 Jul 18 14:03:33 kvm-xen kernel: [ 437.522834] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.522840] kvm: 3347: cpu1 ignored rdmsr: 0x1c9 Jul 18 14:03:33 kvm-xen kernel: [ 437.522842] kvm: 3347: cpu1 ignored rdmsr: 0x60 Jul 18 14:03:33 kvm-xen kernel: [ 437.522865] kvm: 3347: cpu1 ignored rdmsr: 0x1c9 Jul 18 14:03:33 kvm-xen kernel: [ 437.522867] kvm: 3347: cpu1 ignored rdmsr: 0x60 Jul 18 14:03:33 kvm-xen kernel: [ 437.522921] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523005] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523081] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523175] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523248] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523333] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop Jul 18 14:03:33 kvm-xen kernel: [ 437.523430] kvm: 3347: cpu1 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop i hope thats the info you need, i booted it with ignore_msrs=1 since if i dont do that i get less output. (do you need it without the "option"?) > >> the unigine benchmark ran flawlessly >> also the benchmark included in windows gave my videocard >> similar values (7.7) comparable with my native win7 (7.9) >> >> >> now to my questions... >> 1. is it possible to reset the videocard properly to be able to >> reboot the vm? > Which versions of kernel and qemu-kvm are involved via your distro? Can > you retry with latest Linux (3.5-rcX) / lastest qemu-kvm? Maybe > something got fixed meanwhile. > > In general, there are many adapters that require special procedures to > perform resets. This one may fall into that category as well. i will do a test today. >> 2. the xonar d2x is a very nice audio card, it would be very handy >> to be able to use it in the vm. in my oppinion the card is a >> d2 with a pci-e to pci bridge. >> i tried to passthrough the card alone and with the pci-bridge >> that was shown though lspci, but i had no success. >> maybe you guys here have an idea on that topic? > Any further details about the error? Does the adapter work with a Linux > guest or provide more information that way? > > Jan i will also add info here later >