Hello.

I'm trying to test qemu and nvmm on :

DragonFly marietto 6.1-DEVELOPMENT DragonFly v6.1.0.573.gfca8e8-DEVELOPMENT #0: Wed Dec 22 09:11:32 CET 2021 marietto@marietto:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64

first of all I added these users on the nvmm group :

root@marietto:/home/marietto # pw groupmod nvmm -m marietto
root@marietto:/home/marietto # pw groupmod nvmm -m root

then,I've launched this vm :

qemu-system-x86_64 \
-machine type=q35,accel=nvmm \
-smp cpus=4 -m 8G \
-drive if=pflash,format=raw,readonly=on,file=/usr/local/share/uefi-edk2-qemu/QEMU_UEFI_CODE-x86_64.fd \
-drive if=pflash,format=raw,file=/usr/local/share/uefi-edk2-qemu/QEMU_UEFI_VARS-x86_64.fd \
-drive file=/mnt/dragonfly-ufs/bhyve/impish-cuda-11-4-nvidia-470.img,if=none,id=disk0 \
-device virtio-blk-pci,drive=disk0 \
-netdev user,id=net0,hostfwd=tcp:127.0.0.1:6022-:22 \
-device virtio-net-pci,netdev=net0 \
-object rng-random,id=rng0,filename=/dev/urandom \
-device virtio-rng-pci,rng=rng0 \
-display curses \

WARNING: Image format was not specified for '/mnt/dragonfly-ufs/bhyve/impish-cuda-11-4-nvidia-470.img' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions.

unfortunately I get this error,that it seems a bug to me :

qemu-system-x86_64: invalid accelerator nvmm

just because nvmm works great :

root@marietto:/home/marietto/Desktop # nvmmctl identify

nvmm: Kernel API version 3
nvmm: State size 1008
nvmm: Comm size 4096
nvmm: Max machines 128
nvmm: Max VCPUs per machine 128
nvmm: Max RAM per machine 127T
nvmm: Arch Mach conf 0
nvmm: Arch VCPU conf 0x3<CPUID,TPR>
nvmm: Guest FPU states 0x3<x87,SSE>

UPDATE :

I've got qemu from here :

fetch https://leaf.dragonflybsd.org/~aly/nvmm/qemu-6.0.0_1.txz

and I tried again 😀

/home/marietto/Desktop/Files/DFLY/qemu-6.0.0_1/usr/local/bin/./qemu-system-x86_64 \
-machine type=q35,accel=nvmm \
-smp cpus=4 -m 8G \
-drive if=pflash,format=raw,readonly=on,file=/usr/local/share/uefi-edk2-qemu/QEMU_UEFI_CODE-x86_64.fd \
-drive if=pflash,format=raw,file=/usr/local/share/uefi-edk2-qemu/QEMU_UEFI_VARS-x86_64.fd \
-drive file=/mnt/dragonfly-ufs/bhyve/impish-cuda-11-4-nvidia-470.img,if=none,id=disk0 \
-device virtio-blk-pci,drive=disk0 \
-netdev user,id=net0,hostfwd=tcp:127.0.0.1:6022-:22 \
-device virtio-net-pci,netdev=net0 \
-object rng-random,id=rng0,filename=/dev/urandom \
-device virtio-rng-pci,rng=rng0 \
-display curses \

output :

qemu-system-x86_64: NVMM: Mem Assist Failed [gpa=0xfffffff0]
qemu-system-x86_64: NVMM: Failed to execute a VCPU.
Abort trap (core dumped)
VGA Blank mode