Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type

[Jing Liu <jing2.liu@linux.intel.com>]

Hi Sergio,

The idea is interesting and I tried to launch a guest by your
guide but seems failed to me. I tried both legacy and normal modes,
but the vncviewer connected and told me that:
The vm has no graphic display device.
All the screen in vnc is just black.

kernel config:
CONFIG_KVM_MMIO=y
CONFIG_VIRTIO_MMIO=y

I don't know if any specified kernel version/patch/config
is needed or anything I missed.
Could you kindly give some tips?

Thanks very much.
Jing



> A QEMU instance with the microvm machine type can be invoked this way:
> 
>   - Normal mode:
> 
> qemu-system-x86_64 -M microvm -m 512m -smp 2 \
>   -kernel vmlinux -append "console=hvc0 root=/dev/vda" \
>   -nodefaults -no-user-config \
>   -chardev pty,id=virtiocon0,server \
>   -device virtio-serial-device \
>   -device virtconsole,chardev=virtiocon0 \
>   -drive id=test,file=test.img,format=raw,if=none \
>   -device virtio-blk-device,drive=test \
>   -netdev tap,id=tap0,script=no,downscript=no \
>   -device virtio-net-device,netdev=tap0
> 
>   - Legacy mode:
> 
> qemu-system-x86_64 -M microvm,legacy -m 512m -smp 2 \
>   -kernel vmlinux -append "console=ttyS0 root=/dev/vda" \
>   -nodefaults -no-user-config \
>   -drive id=test,file=test.img,format=raw,if=none \
>   -device virtio-blk-device,drive=test \
>   -netdev tap,id=tap0,script=no,downscript=no \
>   -device virtio-net-device,netdev=tap0 \
>   -serial stdio
>