After updating my Gentoo host machine yesterday with emerge -avDNu world, which included update of kvm from app-emulation/qemu-kvm-0.13.0-r2 to app-emulation/qemu-kvm-0.14.1, I wasn’t able to boot my guests systems any more. So first thing I did was emerge qemu-kvm. It turns out that it doesn’t help – kvm file is still missing.

gentoo1 ~# ls -l /usr/bin/ | grep kvm
-rwxr-xr-x 1 root root      66872 May 28 16:03 kvm.kss

Luckily for me I do have more Gentoo machines with KVM virtualization.

I’ve logged in on my other KVM Gentoo machine and found out following:

gentoo2 ~# ls -l /usr/bin/ | grep kvm
lrwxrwxrwx 1 root root         17 Nov 11  2010 kvm -> /usr/bin/qemu-kvm
-rwxr-xr-x 1 root root         61 Nov 11  2010 qemu-kvm

OK – so what’s the content of the qemu-kvm file?

gentoo2 ~# cat /usr/bin/qemu-kvm 
#!/bin/sh
exec /usr/bin/qemu-system-x86_64 --enable-kvm "$@"

From the above you can easily fix the problem by creating qemu-kvm file with content above, plus adding the kvm symlink. Hope it’ll help.