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Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KV

From: jacob jacob
Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM)
Date: Thu, 12 Mar 2015 19:11:44 -0400

On Thu, Mar 12, 2015 at 3:07 PM, Bandan Das <address@hidden> wrote:
> jacob jacob <address@hidden> 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.
>> 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

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