VM Memory Map

[Yahya Sohail <ysohail@xxxxxxxxxxxxx>]

Hi,

Accesses to certain memory addresses by the guest trigger a 
KVM_EXIT_MMIO. I can't seem to find a memory map in the documentation or 
source that describes exactly which addresses are real memory and which 
addresses are MMIO addresses (on x86, if that matters). Is there any 
such documentation or a listing in the source?

Is there any way to configure which addresses are MMIO? I hoped that 
mapping memory to MMIO address regions with the 
KVM_SET_USER_MEMORY_REGION ioctl would allow me to use them as memory, 
but that didn't work. The only ioctls that seem relevant to MMIO are 
KVM_(UN)REGISTER_COALESCED_MMIO, but those only allow coalescing MMIO 
exits, not changing which addresses cause them.

Thanks,
Yahya Sohail