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

[jacob jacob]

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