On Fr, 2015-07-03 at 08:45 +0200, Paolo Bonzini wrote: > > On 29/06/2015 10:53, Gerd Hoffmann wrote: > > virtio version 1.0 registers can (and actually do in the qemu > > implementation) live in mmio space. So we must run the blk and > > scsi virtio drivers in 32bit mode, otherwise we can't access them. > > > > This also allows to drop a bunch of GET_LOWFLAT calls from the virtio > > code in the following patches. > > This isn't really necessary though. The config access capability exists > for this reason. At least as a follow up it would be nice to add a switch.
Just saw mst's patch implementing it in qemu. I'll have a look. I think I want keep the virtio drivers as 32bit drivers. The modern virtio bar is a 64bit though, so accessing via config access capability might be needed even for the 32bit drivers in case it is mapped above 4G ... cheers, Gerd
