Comment 4 for bug 1981631

OK, I maybe mistriaged this bug report, as this is specific to the Ampere architecture with SR-IOV support, so nevermind comment #2.

FWIW, this hardware support is very special as you indeed need to enable VFs, as described in nvidia docs :
https://docs.nvidia.com/grid/latest/grid-vgpu-user-guide/index.html#creating-sriov-vgpu-device-red-hat-el-kvm

Indeed, 32 VFs would be configured *but* if you specify enabled_vgpu_types to the right nvidia-471 type for the PCI address, then the VGPU inventory for this PCI device will have a total of 4, not 32 as I tested earlier.

Anyway, this whole Ampere support is very fragile upstream as this is not fully supported upstream, so I'm about to set this bug to Opinion, as Ampere GPUs won't be able to be tested upstream.

Please do further testing to identify whether something is missing with current vGPU support we have in Nova but for the moment and which would break Ampere support, but please understand that upstream support is absolutely hardware-independant and has to not be nvidia-specific.