On Mon, Aug 16 at 10:44 AM Ashish Kalra wrote:
> I am not sure if we really don't need QEMU's MMIO logic, I think that
once the>
> mirror VM starts booting and running the UEFI code, it might be only
during
> the PEI or DXE phase where it will start actually running the MH code,
> so mirror VM probably still need to handles KVM_EXIT_IO when SEC
phase does I/O,
> I can see PIC accesses and Debug Agent initialization stuff in SEC
startup code.
The migration handler prototype that we are releasing in the near future
does not use the SEC or PEI phases in the mirror. We have some support
code that runs in the main VM and sets up the migration handler entry
point. QEMU starts the mirror pointing to this entry point, which does
some more setup (like switching to long mode) and jumps to the migration
handler.
-Tobin
> Addtionally this still requires CPUState{..} structure and the backing
> "X86CPU" structure, for example, as part of kvm_arch_post_run() to get
> the MemTxAttrs needed by kvm_handle_io().
> Thanks,
> Ashish
