On Tue, Feb 03, 2015 at 12:08:33PM +0100, Paolo Bonzini wrote:
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> On 02/02/2015 17:19, Stefan Hajnoczi wrote:
> > How does the CPU detect that the device has completed the reset 
> > procedure?  Is this supposed to be synchronous?  If yes, is that a 
> > good idea (i.e. hopefully resetting doesn't involve any blocking 
> > operations or operations that take a long time)?
> 
> Most of the time in QEMU reset is synchronous.  Think of block devices
> that do bdrv_drain_all() as part of reset!

That doesn't mean we should add more cases.

Stefan