Hello, I may have soon the PF driver of an SR-IOV card to code and make work with QEMU/KVM so I have the following questions.
In an AMD64 setup where QEMU use VFIO to passthrough the VFs of an SR-IOV card to a guest will the consequences of a PF FLR be handled fine by QEMU and the guest ? I read that pci_reset_function would call pci_restore_state restoring the SR-IOV configuration after the reset of the PF. The ways the hardware work means that the VFs would disappear and reappear in a short lapse of time. Will these events be handled by the kernel pci hotplug code ? Given that the PF driver restore the PF config space after the reset will /sys files used by QEMU disappear and reappear messing the QEMU VFIO passthrough or will it goes smoothly ? Best regards Benoît Canet
