[libvirt-users] sr-vio on intel while virsh chooses rtl8139 for model type

[lejeczek]

On 08/10/14 15:41, Laine Stump wrote:
> On 10/08/2014 03:35 AM, lejeczek wrote:
>> On 03/10/14 17:15, Laine Stump wrote:
>>> On 10/03/2014 11:38 AM, lejeczek wrote:
>>>> hi everybody
>>>>
>>>> I'd presume virsh makes the best possible choice, right?
>>>> It is that just seems bit... odd having realtek in guest and Intel's
>>>> VF on host, no?
>>> This can safely be ignored - in the case of an SRIOV VF that is assigned
>>> to the guest using PCI passthrough device assignment, the "model"
>>> attribute is meaningless, but libvirt will always fill in the default
>>> value (which is rtl8139) in the XML to prevent surprises if the default
>>> emulated NIC model ever changes.
>>>
>>> (I am assuming that you're using either <interface type='hostdev'> or
>>> <interface type='network'> pointint to a network that has <forward
>>> mode='hostdev'>. If you are instead using "type='direct'" or a network
>>> with "<forward mode='bridge|passthrough|vepa'>" then the model *does*
>>> matter, and you probably want to set it to "virtio", which is *not* the
>>> default because not all guest OSes have a virtio network driver by
>>> default (e.g. MS Windows))
>> I don't use forward (unless libvirt does that for me) but I have a
>> pool like this one:
> This does not show the details of your network. For that, you would need
> to get the output of "virsh net-dumpxml passpool-enp2s0f0".
>
> If, as you have indicated in your next message, the guest sees the same
> hardware type as what is physically on the host, then you are using
> <forward mode='hostdev'> in your network (and no, libvirt would not "do
> that for you", you or someone else would have needed to configure the
> network "passpool-enp2s0f0" in that way).
yes, I see, that's correct, it's in network config - 
<forward mode='hostdev' managed='yes'>
guest sees Intel 82576 Virtual Function.
thanks.
>> <interface type='network'>
>>        <mac address='52:54:00:51:af:0e'/>
>>        <source network='passpool-enp2s0f0'/>
>>        <model type='rtl8139'/>
>>        <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
>> function='0x0'/>
>>      </interface>
>> In a win 2008 guest OS is missing drivers for this device and I wonder
>> what is that it gets?
>>
>