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Jiff Slater
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25 Feb 2021
 

Mounting a local directory in a qemu/kvm virtual machine
28 January 2021

I usually try to run my virtual machines using my existing kernel and this means that any modules I use I have to mount them within the virtual machine. I usually use the 9p mount to achieve this but in some scenarios it’s easier to use the virtual vfat mount type in KVM/QEMU.

With the 9p mount, you can use.

qemu_system_x86_64 -fsdev local,path=/directory,security-model=mapped-xattr,id=9p,readonly -device virtio-9p-pci,mount_tag=9p

And mount it locally with

mount -t 9p -o trans=virtio 9p /guest/directory

You can also use the virtual FAT filesystem.

qemu_system_x86_64 -file=fat:ro:/directory,id=vfat,format=raw,if=none -device usb-storage,drive=vfat