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Re: [PATCH v3 6/7] vpci: add SR-IOV support for DomUs
- To: Jan Beulich <jbeulich@xxxxxxxx>, Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
- From: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>
- Date: Fri, 24 Apr 2026 06:34:15 +0000
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 24 Apr 2026 06:34:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHcyClgJVtVkM11YECyJKBoUo8yu7XprXKAgAQq9wA=
- Thread-topic: [PATCH v3 6/7] vpci: add SR-IOV support for DomUs
On 4/21/26 17:55, Jan Beulich wrote:
> On 09.04.2026 16:01, Mykyta Poturai wrote:
>> From: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
>>
>> Emulate guest BAR register values based on PF BAR values for VFs.
>> This allows creating a guest view of the normal BAR registers and emulates
>> the size and properties as it is done during PCI device enumeration by
>> the guest.
>>
>> Expose VID/DID and class/revision to the guest.
>>
>> Note, that VFs ROM BAR is read-only and is all zeros, but VF may provide
>> access to the PFs ROM via emulation and is not implemented.
>>
>> Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
>> Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>
>
> So this change is merely to avoid having yet another gap on the road to
> DomU support in vPCI? I.e. there's no claim or expectation that VFs
> could now be used in DomU-s?
>
> Jan
Yes, all of my DomU tests were done with extra patches for DomU VPCI
support that are not upstreamed yet.
--
Mykyta
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