Kernel modules needed for virtio-scsi

nettester

Does anyone know which kernel modules are needed for virtio-scsi devices to function beyond virtio, virtioscsi, scsibus and sd? I have all these in my kernel and it actually gets to detecting sd0 as QEMU HARDDISK but then fails to configure it? Sadly i'm totally at loss what other driver might be needed to get the disk configured and searching around the web turned up no hints either (virtio-scsi works with default kernel and my kernel works with ATA drives). Any pointers?

rvp

nettester Not sure why you want to attach sd to virtio when

$ fgrep 'Virtio disk device' /usr/src/sys/arch/amd64/conf/GENERIC
ld*     at virtio?                      # Virtio disk device
$

works fine:

$ fgrep ld0 /var/run/dmesg.boot 
ld0 at virtio0: features: 0x10000a54<INDIRECT_DESC,CONFIG_WCE,FLUSH,BLK_SIZE,GEOMETRY,SEG_MAX>
ld0: 476 GB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 1000215216 sectors
ld0: GPT GUID: ee308ad1-5648-4402-91ce-3d85c5620a65
dk0 at ld0: "EFI system part", 204800 blocks at 2048, type: msdos
dk1 at ld0: "Microsoft reserved partition", 32768 blocks at 206848, type: <unknown>
dk2 at ld0: "Basic data partition", 2048000 blocks at 239616, type: <unknown>
dk3 at ld0: "ebc11ed5-5bac-46c8-a102-885285e6d3a1", 195407872 blocks at 2287616, type: ntfs
autoconfiguration error: ld0: wedge named 'Basic data partition' already existed, using 'ebc11ed5-5bac-46c8-a102-885285e6d3a1'
dk4 at ld0: "Ubuntu", 102400000 blocks at 197697536, type: ext2fs
dk5 at ld0: "FreeBSD-EFI", 20480 blocks at 300097536, type: msdos
dk6 at ld0: "FreeBSD-14.0", 104857600 blocks at 300118016, type: ffs
dk7 at ld0: "FreeBSD-swap", 16777216 blocks at 404975616, type: swap
dk8 at ld0: "NetBSD-EFI", 20480 blocks at 421754880, type: msdos
dk9 at ld0: "NetBSD-Main", 102400000 blocks at 421777408, type: ffs
dk10 at ld0: "NetBSD-swap", 16384000 blocks at 524179456, type: swap
dk11 at ld0: "Linux filesystem", 20971520 blocks at 540563456, type: ext2fs
dk12 at ld0: "OpenBSD-EFI", 20480 blocks at 561534976, type: msdos
dk13 at ld0: "OpenBSD-7.4", 104857600 blocks at 561555456, type: <unknown>
boot device: ld0
$

I'm running Qemu (dangerously ie. using the same NVME drive for Qemu and bare-metal) like this on Linux:

CoreBook# cat /root/bin/qemu.sh
#!/bin/sh
exec kvm -enable-kvm -machine q35 \
        -device intel-iommu -m 4g -cpu host -bios /usr/share/ovmf/OVMF.fd \
        -drive file=/dev/nvme0n1,format=raw,if=none,id=hd0 -device virtio-blk-pci,drive=hd0 \
        -object rng-random,filename=/dev/urandom,id=viornd0 -device virtio-rng-pci,rng=viornd0 \
        -device virtio-net-pci,netdev=net0 -netdev user,id=net0,hostfwd=tcp::5555-:22 \
        "$@"
CoreBook#

nettester

rvp nettester Not sure why you want to attach sd to virtio

I was basically trying to replicate Hetzner's VM configuration and since it worked initially i didn't apply a lot of thought to it.

rvp when works fine:

Interesting. I guess that's good enough for my usage and you are right, it's likely also objectively better than taking the detour of emulating SCSI. In general sd also works fine though (with the GENERIC kernel), it's just my trimmed down kernel where it doesn't and i can't figure out what could be missing (as far as i can tell there is nothing even semi-related left i could re-enable).