On 10/26/12 07:47, Peter Crosthwaite wrote: > Just put RAM regions in the unimplemented spaces in the MMIO region. These > regions have undefined behaviour, but this at least stops QEMU from > segfaulting > when the guest bangs on these registers (and sucessfully fakes reading and > writing the registers with no side effects).
Make that an io region, have the read() handler return 0xff, write handler do nothing except maybe logging/tracing the access for debugging purposes. That is more correct for unassigned mmio space than backing by memory. Adding memory also breaks migration btw. I somehow still think this should be handled one layer up (i.e. the parent region) which could do the approximate arch-specific action. Any chance the access you are seeing is at offset 0x68? cheers, Gerd
