On 2012-05-28 14:44, Michael S. Tsirkin wrote: > On Fri, May 25, 2012 at 05:35:03PM +1000, Alexey Kardashevskiy wrote: >> Some adapters (like NEC PCI USB controller) do not flush their config >> on a sioftware reset and remember DMA config, etc. >> >> If we use such an adapter with QEMU, then crash QEMU (stop it with >> ctrl-A ctrl-X), and try to use it in QEMU again, it may start working >> immediately with previous config when pci_enable_device() is called >> on that PCI function. >> >> To eliminate such effect, some quirk should be called. The proposed >> pci_fixup_final does its job well for mentioned NEC PCI USB but not >> sure if it is 100% correct. >> >> Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx> > > Won't current kvm device assignment be affected by this? Would be surprising if not. > If yes need to address that not just vfio. A reason to solve this at PCI level? Jan
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