Re: [Qemu-devel] [RFC PATCH] vfio: add fixup for broken PCI devices

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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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