MacOS Mac Mini M4 qemu-system-aarch64: Property 'host-arm-cpu.sme' not found

[ruedigerp]

Describe the bug
Instances not starting

launch failed: The following errors occurred: Unexpected error in object_property_find_err() at ../../../qom/object.c:1330: qemu-system-aarch64: Property 'host-arm-cpu.sme' not found

To Reproduce
How, and what happened?

1. multipass launch -c 2 -m 2G -n test

Logs
`[2024-12-13T22:36:53.298] [debug] [image vault] Verifying hash "fb39312ffd2b47b97eaef6ff197912eaa3e0a215eb3eecfbf2a24acd96ee1125"
[2024-12-13T22:36:55.982] [debug] [qemu-img] [3526] started: qemu-img info --output=json /var/root/Library/Caches/multipassd/qemu/vault/images/oracular-20241212/ubuntu-24.10-server-cloudimg-arm64.img
[2024-12-13T22:36:55.988] [debug] [qemu-img] [3527] started: qemu-img amend -o compat=1.1 /var/root/Library/Caches/multipassd/qemu/vault/images/oracular-20241212/ubuntu-24.10-server-cloudimg-arm64.img
[2024-12-13T22:36:55.993] [debug] [qemu-img] [3528] started: qemu-img info /var/root/Library/Caches/multipassd/qemu/vault/images/oracular-20241212/ubuntu-24.10-server-cloudimg-arm64.img
[2024-12-13T22:36:55.998] [debug] [qemu-img] [3529] started: qemu-img resize /var/root/Library/Application Support/multipassd/qemu/vault/instances/test/ubuntu-24.10-server-cloudimg-arm64.img 5368709120
[2024-12-13T22:36:56.003] [debug] [qemu-img] [3530] started: qemu-img snapshot -l /var/root/Library/Application Support/multipassd/qemu/vault/instances/test/ubuntu-24.10-server-cloudimg-arm64.img
[2024-12-13T22:36:56.007] [debug] [qemu-img] [3532] started: qemu-img amend -o compat=1.1 /var/root/Library/Application Support/multipassd/qemu/vault/instances/test/ubuntu-24.10-server-cloudimg-arm64.img
[2024-12-13T22:36:56.010] [debug] [test] process working dir ''
[2024-12-13T22:36:56.010] [info] [test] process program 'qemu-system-aarch64'
[2024-12-13T22:36:56.010] [info] [test] process arguments '-machine, virt,gic-version=3, -accel, hvf, -drive, file=/Library/Application Support/com.canonical.multipass/bin/../Resources/qemu/edk2-aarch64-code.fd,if=pflash,format=raw,readonly=on, -cpu, host, -nic, vmnet-shared,model=virtio-net-pci,mac=52:54:00:76:43:2d, -device, virtio-scsi-pci,id=scsi0, -drive, file=/var/root/Library/Application Support/multipassd/qemu/vault/instances/test/ubuntu-24.10-server-cloudimg-arm64.img,if=none,format=qcow2,discard=unmap,id=hda, -device, scsi-hd,drive=hda,bus=scsi0.0, -smp, 2, -m, 2048M, -qmp, stdio, -chardev, null,id=char0, -serial, chardev:char0, -nographic, -cdrom, /var/root/Library/Application Support/multipassd/qemu/vault/instances/test/cloud-init-config.iso'
[2024-12-13T22:36:56.011] [debug] [qemu-system-aarch64] [3533] started: qemu-system-aarch64 -machine virt,gic-version=3 -nographic -dump-vmstate /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/multipassd.bUfWeu
[2024-12-13T22:36:56.032] [info] [test] process state changed to Starting
[2024-12-13T22:36:56.034] [info] [test] process state changed to Running
[2024-12-13T22:36:56.034] [debug] [qemu-system-aarch64] [3534] started: qemu-system-aarch64 -machine virt,gic-version=3 -accel hvf -drive file=/Library/Application Support/com.canonical.multipass/bin/../Resources/qemu/edk2-aarch64-code.fd,if=pflash,format=raw,readonly=on -cpu host -nic vmnet-shared,model=virtio-net-pci,mac=52:54:00:76:43:2d -device virtio-scsi-pci,id=scsi0 -drive file=/var/root/Library/Application Support/multipassd/qemu/vault/instances/test/ubuntu-24.10-server-cloudimg-arm64.img,if=none,format=qcow2,discard=unmap,id=hda -device scsi-hd,drive=hda,bus=scsi0.0 -smp 2 -m 2048M -qmp stdio -chardev null,id=char0 -serial chardev:char0 -nographic -cdrom /var/root/Library/Application Support/multipassd/qemu/vault/instances/test/cloud-init-config.iso
[2024-12-13T22:36:56.034] [info] [test] process started
[2024-12-13T22:36:56.034] [debug] [test] Waiting for SSH to be up
[2024-12-13T22:36:56.035] [debug] [arp] [3535] started: arp -an
[2024-12-13T22:36:56.233] [debug] [test] QMP: {"QMP": {"version": {"qemu": {"micro": 1, "minor": 2, "major": 8}, "package": ""}, "capabilities": ["oob"]}}

[2024-12-13T22:36:56.259] [warning] [test] Unexpected error in object_property_find_err() at ../../../qom/object.c:1330:
qemu-system-aarch64: Property 'host-arm-cpu.sme' not found

[2024-12-13T22:36:56.259] [warning] [qemu-system-aarch64]
[2024-12-13T22:36:56.259] [info] [test] process state changed to NotRunning
[2024-12-13T22:36:56.259] [error] [test] process error occurred Crashed program: qemu-system-aarch64; error: Process crashed
[2024-12-13T22:36:56.260] [error] [test] error: program: qemu-system-aarch64; error: Process crashed
[2024-12-13T22:38:01.651] [debug] [async task] fetch manifest periodically
[2024-12-13T22:38:01.654] [info] [VMImageHost] Did not find any supported products in "appliance"`

Additional info

• OS: macOS 15.2
• multipass 1.15.0+mac
• multipassd 1.15.0+mac
• multipass info
  Name: test
  State: Unknown
  Snapshots: 0
  IPv4: --
  Release: --
  Image hash: fb39312ffd2b (Ubuntu 24.10)
  CPU(s): --
  Load: --
  Disk usage: --
  Memory usage: --
  Mounts: --
• multipass get local.driver
  qemu

Additional context
I also have an Apple M3, and it was updated to 15.2 today as well. On this machine, Multipass is still running without any issues. Before the update, Multipass also worked on the M4 Mac. Multipass, QEMU, and other related components were completely uninstalled and reinstalled.

[tasosz]

These 2 QEMU issues appear related:
https://gitlab.com/qemu-project/qemu/-/issues/2721
https://gitlab.com/qemu-project/qemu/-/issues/2665
and imply a QEMU issue causes 3842.

Hopefully it'll get fixed in QEMU soon.

[ricab]

Ooof, just what we needed before EOY. Thanks for the report and references!

[ricab]

Here's a package with the CPU type workaround mentioned in https://gitlab.com/qemu-project/qemu/-/issues/2721, i.e., such that on Apple Silicon the qemu command line includes -cpu cortex-a57 instead of host. This will make it emulate that other (older) CPU model, with fewer features, so it will be slower, but hopefully it will help some circumvent the issue.

Could you please try it out and let us know how it goes?

[cougarwww]

@ricab
I have a try this package, it can not work.
`
[2024-12-17T15:30:03.656] [info] [daemon] Starting Multipass 1.16.0-dev.3607.pr705+g7c2616e9e.mac
[2024-12-17T15:30:03.656] [info] [daemon] Daemon arguments: /Library/Application Support/com.canonical.multipass/bin/multipassd --verbosity debug
[2024-12-17T15:30:03.773] [debug] [kube] QMP: {"QMP": {"version": {"qemu": {"micro": 1, "minor": 2, "major": 8}, "package": ""}, "capabilities": ["oob"]}}

[2024-12-17T15:30:03.787] [warning] [kube] qemu-system-aarch64: VCPU supports less PA bits (36) than requested by the memory map (40)
`

[ricab]

That's unfortunate. @cougarwww, was that an existing VM? Do new launches have the same problem?

[cougarwww]

The VM is old，I launch a new one is still not work.
$ multipass launch -d 30G -m 4G -c 4 -n dev2 launch failed: The following errors occurred: qemu-system-aarch64: VCPU supports less PA bits (36) than requested by the memory map (40) dev2: shutdown called while starting

[cougarwww]

I use brew install qemu QEMU emulator version 9.2.0 and -cpu cortex-a57 can run the multipass vm old img

[ruedigerp]

hi @ricab,

thx. installed and tested. No SME Error but another one:
❯ multipass launch -n test2 launch failed: The following errors occurred: qemu-system-aarch64: VCPU supports less PA bits (36) than requested by the memory map (40) test2: shutdown called while starting

[ruedigerp]

@ricab
Once again, a few more details.
I uninstalled QEMU again with:
brew uninstall qemu --zap
Then reinstalled it:
brew install qemu

Deleted all VMs with Multipass, ran a purge, and created a new one:
multipass delete --all
multipass purge
multipass launch -c 2 -m 1G --disk 10G

qemu-system-aarch64: VCPU supports less PA bits (36) than requested by the memory map (40)