Enable virtfs on macOS host

[tiiiecherle]

Thanks for this really nice project.

It would be nice if virtfs could be enabled in the next build for macOS as it helps a lot sharing folders to linux guests with p9 mounts.

Thanks

[osy]

Can be implemented once support is in QEMU

[tiiiecherle]

o.k., thanks ;)

[4ntoine]

Any update on that? Any suggestion on how to share a directory with max performance between host macOS or Linux and guest os Linux (supported by UTM)?

[4ntoine]

Getting "virtfs support is disabled" message for UTM 2.2.4

[4ntoine]

adding to qemu:

-fsdev
local,security_model=none,id=fsdev0,multidevs=remap,path=/tmp/share
-device
virtio-9p-pci,fsdev=fsdev0,mount_tag=host_storage,id=virtio-9p-pci0

[4ntoine]

@osy any solution/workaround? Any doc on how to use built-in dirs sharing UTM functionality? Can't find any details in FAQ

[ndp34]

Hi, sadly I have same issue. And It's really important for me.

[amboar]

I'm on an M1 under Monterey using UTM 3.2.4 (58). Instead of fsdev support is disabled I get qemu-aarch64-softmmu: -virtfs local,path=tmp/share,mount_tag=share,security_model=mapped-xattr: cannot initialize fsdev 'share': failed to open '/tmp/share': Operation not permitted.

[thouseef]

I'm on an M1 under Monterey using UTM 3.2.4 (58). Instead of fsdev support is disabled I get qemu-aarch64-softmmu: -virtfs local,path=tmp/share,mount_tag=share,security_model=mapped-xattr: cannot initialize fsdev 'share': failed to open '/tmp/share': Operation not permitted.

I'm also getting the same error on M1 using UTM 3.2.4:
qemu-aarch64-softmmu: -virtfs local,path=/Users/username/workspace,security_model=none,mount_tag=workspace: cannot initialize fsdev 'workspace': failed to open '/Users/username/workspace': Operation not permitted

[zachlatta]

Hi there, just to chime in. It looks like as of March 2022, virtfs support is included in the Homebrew version of QEMU: Homebrew/homebrew-core@a70f2f6

I wonder if this these patches could be added to the QEMU version included with UTM to enable virtfs?

[Atemu]

@zachlatta these shouldn't be necessary as UTM already ships QEMU v7.

[zachlatta]

@Atemu: it looks like Homebrew ships with QEMU v6 with some patches that make it virtfs work, so it's not a matter of Homebrew having a more up to date release, but rather specific patches being included - Homebrew/homebrew-core@a70f2f6#diff-5fe005c786b1e905434aaa353962cc6a58b0a6431e7f9a785076f0ad5f277a3dR54-R108

[Atemu]

@zachlatta

# The following patches add 9p support to darwin.  They can
# be deleted when qemu-7 is released.

Homebrew/homebrew-core@a70f2f6#diff-5fe005c786b1e905434aaa353962cc6a58b0a6431e7f9a785076f0ad5f277a3dR54-R55

[zachlatta]

Ah... I'm sorry. Thank you for the correction!

[elmehdibadaoui]

Solved ! by an easy steps On UTM

1. Close the emulator with problem
2. Select the emulator on UTM interface
3. On the shared directory (Clear) and Save
4. Re-choose an Shared directory (in my case Download)
5. You can now Run your emulator