On 07/16/2013 01:02 AM, Anthony Liguori wrote: > Alexey Kardashevskiy <a...@ozlabs.ru> writes: > >> On 07/13/2013 06:03 PM, David Gibson wrote: >>> On Fri, Jul 12, 2013 at 05:37:19PM +1000, Alexey Kardashevskiy wrote: >>>> sPAPR PHB emulates IO ports on PCI via a special memory region which >>>> routes all reads/writes further via cpu_in*/cpu_out* which are eventually >>>> processed by MemoryRegionOps implemented by devices. >> >>> Hrm. That double dispatch was a workaround for bugs in the plain >>> memory region dispatching which meant we couldn't directly map regions >>> in memory space to IO areas. >>> >>> It would be worth checking if that workaround is still necessary. >> >> Hm. Good point, thanks! It seems memory_region_init_io is not necessary any >> more. Will make a patch for it. > > You should try the latest qemu.git commit. There shouldn't be a problem > anymore.
Does this mean sPAPR still needs an additional IO memory region? It looks redundand and everything (almost) works without it... -- Alexey
