On 10/04/2018 06:57, Tiwei Bie wrote:
>> So you just move the abstraction layer from qemu to kernel, and you still
>> need different drivers in kernel for different device interfaces of
>> accelerators. This looks even more complex than leaving it in qemu. As you
>> said, another idea is to implement userspace vhost backend for accelerators
>> which seems easier and could co-work with other parts of qemu without
>> inventing new type of messages.
> 
> I'm not quite sure. Do you think it's acceptable to
> add various vendor specific hardware drivers in QEMU?

I think so.  We have vendor-specific quirks, and at some point there was
an idea of using quirks to implement (vendor-specific) live migration
support for assigned devices.

Paolo
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