[vfio-users] (good) working GPU for passthrough?

[Kyle Marek]

On 2/11/19 9:18 PM, Alex Williamson wrote:
> On Mon, 11 Feb 2019 20:39:07 -0500
> Kyle Marek <psppsn96 at gmail.com> wrote:
>
>> On 2/10/19 8:59 PM, Kash Pande wrote:
>>> On 2019-02-10 5:25 p.m., Kyle Marek wrote:  
>>>> When I quit in the QEMU monitor, the image stays on the screen, and no
>>>> further host dmesg output is produced.
>>>>  
>>> You must do a full reset in the guest.  
>> Hmmm... other cards (GTX 780, GTX 1060), are reset when quitting from
>> the monitor, so I don't have to rely on a graceful guest shutdown to
>> avoid rebooting my host.
> NVIDIA cards reset properly from a bus reset.
>  
>> Do I need to wait for a reset quirk to be implemented for my card to
>> reset on quit/boot? It shouldn't be a condition to usage that the guest
>> needs to gracefully shutdown for the card to not get stuck.
> Don't hold your breath.

Good news! Radeon VII resets on guest start, but quitting QEMU from the
monitor leaves the card rendering its BIOS character buffer (test case
is quitting during SeaBIOS).

When do PCI bus resets happen?

Hopefully it also resets on VM start if I ever get a BIOS update with an
EFI ROM.