[Qemu-devel] MMIO access hangs the whole virtual machine

[Hangchen YU]

Hi-

I created an IO by memory_region_init_io with a MemoryRegionOps in a block
device. The IO r/w handler takes a while to finish, and during that time
the whole VM hangs.
There was a similar discussion about the synchronous qemu_aio_cancel four
years ago (
https://lists.gnu.org/archive/html/qemu-devel/2014-08/msg01545.html). Has
that issue been resolved or is there any alternative way to make the MMIO
access asynchronous?

Thanks,
Hangchen