Re: [Xen-devel] [PATCH 10/10] vpci/sriov: add support for SR-IOV capability

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.07.18 at 13:07, <roger.pau@xxxxxxxxxx> wrote:
> On Tue, Jul 03, 2018 at 04:56:38AM -0600, Jan Beulich wrote:
>> >>> On 03.07.18 at 12:51, <roger.pau@xxxxxxxxxx> wrote:
>> > I don't think we ever want to allow DomU-s to manage the SR-IOV
>> > capability, so this code is always going to be Dom0 only AFAICT. In
>> > fact I think I'm going to add an assert to that effect in the SR-IOV
>> > init handler.
>> 
>> Did you consider nested virt here?
> 
> I can see this making more sense for nested virt, still it's going to
> require a non-trivial amount of work to make SR-IOV safe for DomUs to
> manage, not to mention that DomUs would then be able to make pci
> devices (VFs) appear and disappear, and likely collide with existing
> devices?

Right, avoiding such collisions would be one thing to address.

Jan



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