On Mo, 2014-03-17 at 16:02 +1000, Dave Airlie wrote: > So I'm looking at how best to do virtio gpu device error reporting, > and how to deal with illegal stuff, > > I've two levels of errors I want to support, > > a) unrecoverable or bad guest kernel programming errors, > > b) per 3D context errors from the renderer backend,
What you find in modern real hardware (xhci for example) and which would also make sense for virtio is: * stick an error message into a event queue (for non-fatal errors), which would be a good fit for (b) * set a bit in a error status register, maybe raise IRQ, stop processing until reset (for fatal errors, i.e. your (a) case). such a register can live in config space for virtio. cheers, Gerd
