On 02/18/2016 02:01 PM, Thomas Huth wrote:
> Using a CPU type that does not match the host is not possible when using
> the kvm-hv kernel module - the PVR is checked in the kernel function
> kvm_arch_vcpu_ioctl_set_sregs_hv() and rejected with -EINVAL if it
> does not match the host.
> However, when the user tries to specify a non-matching CPU type, QEMU
> currently only reports "kvm_init_vcpu failed: Invalid argument", and
> this is of course not very helpful for the user to solve the problem.
> So this patch adds a more descriptive error message that tells the
> user to specify "-cpu host" instead.
>
> Signed-off-by: Thomas Huth <th...@redhat.com>
> ---
> target-ppc/kvm.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
> index 762d6cf..6545fbe 100644
> --- a/target-ppc/kvm.c
> +++ b/target-ppc/kvm.c
> @@ -513,6 +513,10 @@ int kvm_arch_init_vcpu(CPUState *cs)
> /* Synchronize sregs with kvm */
> ret = kvm_arch_sync_sregs(cpu);
> if (ret) {
> + if (ret == -EINVAL) {
> + error_report("Register sync failed... If you're using kvm-hv.ko,"
> + " only \"-cpu host\" is possible!");No need to shout at the user; drop the trailing ! -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
signature.asc
Description: OpenPGP digital signature
