Regarding #2 how exactly do I call things to reproduce this OVMF bug behaviour,
>> Any kind of setup, download and commandline.
Please refer to the following steps:
a) Tested on Ubuntu Host Kernel version: 6.11.0-19-generic
b) Download and build the latest QEMU upstream(9.1+)
(Reason: Current QEMU noble package version(8.2.2) has no SNP
support for QEMU SNP VM launch (A separate issue unlinked with this OVMF bug))
# Download QEMU 9.1+ source code
wget https://download.qemu.org/qemu-9.1.3.tar.xz
tar xvJf qemu-9.1.3.tar.xz
cd qemu-9.1.3
#Installed missing package dependencies on my noble host for
QEMU build process
# Build QEMU 9.1.3
./configure
make
c) Install the OVMF noble package
sudo apt install -y ovmf
d) Download and configure theQCOW2 guest image with the cloud-init
user and meta-data(GUEST_IMAGE.qcow2)
e) Launch SNP QEMU VM with following qemu commandline(bios that
points to noble OVMF.fd filepath):
${HOME}/qemu-9.1.3/build/qemu-system-x86_64 \
-enable-kvm \
-cpu EPYC-v4 \
-nographic \
-device virtio-scsi-pci,id=scsi0 \
-device scsi-hd,drive=disk0 \
-drive
if=none,id=disk0,format=qcow2,file=<GUEST_IMAGE.qcow2-file-path> \
-bios /usr/share/ovmf/OVMF.fd \
-object
memory-backend-memfd,id=ram1,size=2048M,share=true,prealloc=false \
-machine memory-backend=ram1,confidential-guest-support=sev0 \
-object sev-snp-guest,id=sev0,cbitpos=51,reduced-phys-bits=1
f) Error: The above QEMU SNP Guest VM boot command hangs
(This OVMF behaviour is found similar to the old GH Issue found
in https://github.com/AMDESE/AMDSEV/issues/236)
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https://bugs.launchpad.net/bugs/2104069
Title:
OVMF.fd file doesn't support SNP QEMU Guest Launch
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