Can't lanuch SEV-SNP VM, SEV information block/Firmware GUID Table block not found in pflash rom

[lcmfq]

When I use"/usr/local/bin/qemu-system-x86_64 -enable-kvm -cpu host -smp 4,maxcpus=64 -m 2048M,slots=5,maxmem=10240M -no-reboot -drive if=pflash,format=raw,unit=0,file=/usr/local/share/qemu/OVMF_CODE.fd,readonly=on -drive if=pflash,format=raw,unit=1,file=/home/anolis/os/anolisos.fd -drive file=/home/anolis/os/anolisos.qcow2,if=none,id=disk0,format=qcow2 -device virtio-scsi-pci,id=scsi,disable-legacy=on,iommu_platform=true -device scsi-hd,drive=disk0 -machine memory-encryption=sev0,vmport=off -object memory-backend-memfd,id=ram1,size=2048M,share=true,prealloc=false -machine memory-backend=ram1 -object sev-snp-guest,id=sev0,policy=0xb0000,cbitpos=51,reduced-phys-bits=1 -vnc localhost:1
"to lanuch VM ,I get an issue
qemu-system-x86_64: SEV information block/Firmware GUID Table block not found in pflash rom
qemu-system-x86_64: failed to locate and/or save reset vector

My host:AnolisOS-23.1-ALPHA2-x86_64
Host kernel:6.9.0-snp-host-rc7+
qemu:snp-latest "https://github.com/AMDESE/qemu.git”
ovmf：snp-latest "https://github.com/AMDESE/ovmf.git"
dmesg |grep SEV
[ 0.000000] SEV-SNP: RMP table physical range [0x000000bf8ce00000 - 0x000000c04d3fffff]
[ 9.734412] ccp 0000:01:00.5: SEV API:1.55 build:28
[ 9.734419] ccp 0000:01:00.5: SEV-SNP API:1.55 build:28
[ 19.234477] kvm_amd: SEV enabled (ASIDs 500 - 1006)
[ 19.234480] kvm_amd: SEV-ES enabled (ASIDs 1 - 499)
[ 19.234481] kvm_amd: SEV-SNP enabled (ASIDs 1 - 499)
And I have installed VM success,"/usr/local/bin/qemu-system-x86_64 -enable-kvm -cpu host -smp 4,maxcpus=64 -m 2048M,slots=5,maxmem=10240M -no-reboot -drive if=pflash,format=raw,unit=0,file=/usr/local/share/qemu/OVMF_CODE.fd,readonly=on -drive if=pflash,format=raw,unit=1,file=/home/anolis/os/anolisos.fd -drive file=/home/anolis/os/AnolisOS-23.1-ALPHA2-x86_64-dvd.iso,media=cdrom -boot d -drive file=/home/anolis/os/anolisos.qcow2,if=none,id=disk0,format=qcow2 -device virtio-scsi-pci,id=scsi0,disable-legacy=on,iommu_platform=true -device scsi-hd,drive=disk0 -vnc localhost:1

[tlendacky]

If you are using the most recent Qemu snp-latest, then you must use the -bios option for the OVMF code file instead of the -drive if=pflash option.

See https://github.com/AMDESE/AMDSEV/blob/snp-latest/launch-qemu.sh