[Users] [libvirt] Host local_host running without virtualization hardware acceleration

[Martin Kletzander]

On Tue, Nov 05, 2013 at 09:08:33AM +0100, Sandro Bonazzola wrote:
> Hi,
> I had to reinstall ovirt yesterday and now it seems that it doesn't work anymore.
> I'm running nightly on Fedora 18.
>  kernel-3.11.4-101.fc18.x86_64
>  sanlock-2.8-1.fc18.x86_64
>  libvirt-1.1.4-1.fc18.x86_64
>  qemu-1.5.1-1.fc18.x86_64
>  vdsm-4.13.0-93.gitea8c8f0.fc18.x86_64
>  ovirt-engine-3.4.0-0.2.master.20131104192919.git3b65870.fc18.noarch
> 
> engine-setup with all-in-one detects hardware virtualization and allow me to configure the system.
> (it fails detecting engine health status due probably to recent changes in its URL, I'm already looking into it)
> 
> Once added localhost to the engine, it has been moved to non operational mode saying
> I don't have virtualization hardware acceleration anymore.
> 
> I've found that:
> 
> # modinfo kvm
> filename:       /lib/modules/3.11.4-101.fc18.x86_64/kernel/arch/x86/kvm/kvm.ko
> license:        GPL
> author:         Qumranet
> depends:
> intree:         Y
> vermagic:       3.11.4-101.fc18.x86_64 SMP mod_unload
> parm:           min_timer_period_us:uint
> parm:           ignore_msrs:bool
> parm:           tsc_tolerance_ppm:uint
> parm:           allow_unsafe_assigned_interrupts:Enable device assignment on platforms without interrupt remapping support. (bool)
> 

This is good, but AFAIK this module is not what provides /dev/kvm.
Depending on the processor you're using, try checking 'kvm_intel' or
'kvm_amd'.  Also make sure both are loaded.

> # /usr/bin/qemu-kvm
> Could not access KVM kernel module: No such file or directory
> failed to initialize KVM: No such file or directory
> 
> looking at strace:
> open("/dev/kvm", O_RDWR|O_CLOEXEC)      = -1 ENOENT (No such file or directory)
> 

What does ls -lZ /dev/kvm tell you?

> Any clue on what may be happened?
> 

No idea, but I'm basing everything on the fact that it worked before
the re-install, am I right?

Martin
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