On 02/08/2017 10:45, peng.hao2@xxxxxxxxxx wrote: >>On 02/08/2017 17:24, Peng Hao wrote: > coalesced MMIO is async and io port should be sync . I don't need to > coalese io port access. Coalesced MMIO access is resolved on the next read from a coalesced MMIO address or the next write to a non-coalescecd MMIO address. So it would work perfectly for port 0x70. You would have to modify QEMU to split the RTC I/O ports into two MemoryRegions. Paolo
