On Thu Oct 2, 2025 at 6:13 AM JST, Zhi Wang wrote: > On 1.10.2025 17.48, Jason Gunthorpe wrote: >> On Wed, Oct 01, 2025 at 08:09:37AM +0000, Zhi Wang wrote: >>>>> But if the guest sees the passed-through VF as a PF, won't it try to >>>>> do things it is not supposed to do like loading the GSP firmware (which >>>>> is managed by the host)? >>>> >>> >>> The guest driver will read PMC_BOOT_1 and check PMC_BOOT_1_VGPU_VF flag >>> to tell if it is running on a VF or a PF. >> >> Yes exactly, and then novacore should modify its behavior and operate >> the device in the different mode. >> >> It doesn't matter if a VM is involved or not, a VF driver running side >> by side wit the PF driver should still work. >> >> There are use cases where people do this, eg they can stick the VF >> into a linux container and use the SRIOV mechanism as a QOS control. >> 'This container only gets 1/4 of a GPU' >> > > Right, I also mentioned the same use cases of NIC/GPU in another reply > to Danilo. But what I get is NVIDIA doesn't use bare metal VF to support > linux container, it seems there have been other solutions. IMHO, it is > not mandatory that we have to support VF driver on bare metal so far > yet.
For my education, what gets in the way of supporting a VF on the bare metal if we already support it from inside a VM?
