Re: [RFC PATCH 0/5] PCI/vfio-pci: Guard resets against active SR-IOV VFs

[Samiullah Khawaja]

On Tue, Aug 11, 2026 at 10:53:18PM -0600, Alex Williamson wrote:
> It's recently been found[1] that vfio-pci doesn't restrict resets on PFs
> while SR-IOV is enabled.  This can not only result in an uncoordinated
> disruption of the use of the associated VFs, but the ongoing use of and
> access to the VF has the potential to result in machine checks.
>
> This series proposes that this gap is largely an oversight of
> pci_reset_function() to recognize that a PF reset affecting SR-IOV VFs
> violates the scope boundary of the pci_reset_function() API.

Hi Alex,

Thanks for sending out the RFC to fix this issue. I cherry-picked it
into my environment to verify that whether it fixes the issue I was
experiencing and it does fix it. I will continue to do more testing, but
when you send this as a formal v1, you can add:

Tested-by: Samiullah Khawaja <skhawaja@xxxxxxxxxx>
Reported-by: Samiullah Khawaja <skhawaja@xxxxxxxxxx>

Sami