Re: BUG: linux guest with paravirt support thinks it boots on bare hardware

Anthony Liguori
2008-03-30T19:44:32Z

Felix Leimbach wrote:
> While testing the new virtio drivers in linux-2.6.25 my test
> 2.6.25-rc7-git5 guest with paravirt support running in KVM-64 thinks it
> sits on cold and unfriendly bare metal instead of a safe and cosy KVM
> bed ;-)
> Because it is very unhappy it emits the following message during boot:
> Booting paravirtualized kernel on bare hardware
>
> Of course the guest still runs perfectly and I am indeed very impressed
> by KVM and its performance. A big thanks to all the hard working devs
> for that!
>
> Relevant config and dmesg below.
>
> regards,
> Felix
>
> # zcat /proc/config.gz |grep '\(VIRT\|VMI\|XEN\)'
> CONFIG_PARAVIRT_GUEST=y
> CONFIG_XEN=y
> CONFIG_VMI=y
> CONFIG_PARAVIRT=y
> CONFIG_VIRT_TO_BUS=y
> # CONFIG_XEN_BLKDEV_FRONTEND is not set
> CONFIG_VIRTIO_BLK=y
> CONFIG_XEN_NETDEV_FRONTEND=y
> CONFIG_VIRTIO_NET=y
> CONFIG_HVC_XEN=y
> # CONFIG_FB_VIRTUAL is not set
> CONFIG_VIRTUALIZATION=y
> CONFIG_VIRTIO=y
> CONFIG_VIRTIO_RING=y
> CONFIG_VIRTIO_PCI=y
> CONFIG_VIRTIO_BALLOON=y
>

You're probably missing:

CONFIG_KVM_CLOCK=y
CONFIG_KVM_GUEST=y

Regards,

Anthony Liguori