[Bug 1869858] Re: qemu can't start Windows10arm64 19H1(with kvm)

[chen]

And I am try Windows 10 build 19613，but was cant not start，too(sorry，My
english It's not well)

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https://bugs.launchpad.net/bugs/1869858

Title:
  qemu can't start Windows10arm64 19H1(with kvm)

Status in QEMU:
  Incomplete

Bug description:
  My cpu's model is arm64(cortex-a53),I want start Win10arm64 with kvm,Because 
is fast than x86.But it's did'nt work.The screnn is card in Uefi's logo. But I 
am use ramfb now,So it has nothing to do with the graphics card.But if I 
discard kvm,It can start now.But its so slowly.But I use the uefi and kvm can 
start with Debian arm64 buster. So who's the problem?qemu or kvm or 
Microsoft?But others use it to start successfully. I don't know what I would 
like to do
  This is start command(Qemu version is 4.1')
  qemu-system-aarch64 -hda /win10.vhdx -cdrom /win10arm.iso -m 1G -accel kvm 
-smp 4 -cpu host -pflash efi.img -pflash var.img -device ramfb -device 
qemu-xhci -device usb-kbd -device usb-mouse -device usb-tablet
  If I replace the above three parameters with "- CPU cortex-a53" and "- accel 
TCG" and "- device VGA", I can start normally. What's the matter?

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