From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bandan Das Subject: Re: PCI passthrough of 40G ethernet interface (Openstack/KVM) Date: Thu, 12 Mar 2015 20:02:50 -0400 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Cc: QEMU Developers , kvm-devel , Alex Williamson To: jacob jacob Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56154 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751113AbbCMAC4 (ORCPT ); Thu, 12 Mar 2015 20:02:56 -0400 Sender: kvm-owner@vger.kernel.org List-ID: jacob jacob writes: > On Thu, Mar 12, 2015 at 3:07 PM, Bandan Das wrote: >> jacob jacob writes: >> >>> Hi, >>> >>> Seeing failures when trying to do PCI passthrough of Intel XL710 40G >>> interface to KVM vm. >>> 0a:00.1 Ethernet controller: Intel Corporation Ethernet >>> Controller XL710 for 40GbE QSFP+ (rev 01) >> >> You are assigning the PF right ? Does assigning VFs work or it's >> the same behavior ? > > Yes.Assigning VFs worked ok.But this had other issues while bringing down VMs. > Interested in finding out if PCI passthrough of 40G intel XL710 > interface is qualified in some specific kernel/kvm release. So, it could be the i40e driver then ? Because IIUC, VFs use a separate driver. Just to rule out the possibility that there might be some driver fixes that could help with this, it might be a good idea to try a 3.19 or later upstream kernel. >>> From dmesg on host: >>> >>>> [80326.559674] kvm: zapping shadow pages for mmio generation wraparound >>>> [80327.271191] kvm [175994]: vcpu0 unhandled rdmsr: 0x1c9 >>>> [80327.271689] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a6 >>>> [80327.272201] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a7 >>>> [80327.272681] kvm [175994]: vcpu0 unhandled rdmsr: 0x3f6 >>>> [80327.376186] kvm [175994]: vcpu0 unhandled rdmsr: 0x606 >> >> These are harmless and are related to unimplemented PMU msrs, >> not VFIO. >> >> Bandan > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48385) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YWD46-0008Tq-PC for qemu-devel@nongnu.org; Thu, 12 Mar 2015 20:02:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YWD44-0002ac-3f for qemu-devel@nongnu.org; Thu, 12 Mar 2015 20:02:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55237) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YWD43-0002Zw-Rj for qemu-devel@nongnu.org; Thu, 12 Mar 2015 20:02:56 -0400 From: Bandan Das References: Date: Thu, 12 Mar 2015 20:02:50 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: jacob jacob Cc: Alex Williamson , QEMU Developers , kvm-devel jacob jacob writes: > On Thu, Mar 12, 2015 at 3:07 PM, Bandan Das wrote: >> jacob jacob writes: >> >>> Hi, >>> >>> Seeing failures when trying to do PCI passthrough of Intel XL710 40G >>> interface to KVM vm. >>> 0a:00.1 Ethernet controller: Intel Corporation Ethernet >>> Controller XL710 for 40GbE QSFP+ (rev 01) >> >> You are assigning the PF right ? Does assigning VFs work or it's >> the same behavior ? > > Yes.Assigning VFs worked ok.But this had other issues while bringing down VMs. > Interested in finding out if PCI passthrough of 40G intel XL710 > interface is qualified in some specific kernel/kvm release. So, it could be the i40e driver then ? Because IIUC, VFs use a separate driver. Just to rule out the possibility that there might be some driver fixes that could help with this, it might be a good idea to try a 3.19 or later upstream kernel. >>> From dmesg on host: >>> >>>> [80326.559674] kvm: zapping shadow pages for mmio generation wraparound >>>> [80327.271191] kvm [175994]: vcpu0 unhandled rdmsr: 0x1c9 >>>> [80327.271689] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a6 >>>> [80327.272201] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a7 >>>> [80327.272681] kvm [175994]: vcpu0 unhandled rdmsr: 0x3f6 >>>> [80327.376186] kvm [175994]: vcpu0 unhandled rdmsr: 0x606 >> >> These are harmless and are related to unimplemented PMU msrs, >> not VFIO. >> >> Bandan > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html