On 16/11/2023 15:26, Stewart Hildebrand wrote:
On 11/16/23 10:12, Julien Grall wrote:
Hi Volodymyr,
On 16/11/2023 15:07, Volodymyr Babchuk wrote:
With my vPCI patch series in place, hypervisor itself assigns BDFs for
passed-through devices. Toolstack needs to get this information to know
which BDFs are free and can be used by virtio-pci.
It sounds a bit odd to let the hypervisor to assign the BDFs. At least because there
might be case where you want to specific vBDF (for instance this is the case with some
intel graphic cards). This should be the toolstack job to say "I want to assign the
pBDF to this vBDF".
Keep in mind we are also supporting dom0less PCI passthrough.
Right, but even with that in mind, I expect the Device-Tree to provide
the details where a given PCI is assigned.
You could have logic for assigning the BDF automagically. But that
should be part of dom0less, not deep into the vPCI code.
Cheers,
--
Julien Grall
