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ppc/kvm: Tell the user what might be wrong when using bad CPU types with kvm-hv

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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 <thuth@redhat.com>
[Removed melodramatic '!' :)]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Thomas Huth 2016-02-18 22:01:56 +01:00 committed by David Gibson
parent 072ed5f260
commit 388e47c75b
1 changed files with 4 additions and 0 deletions
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target-ppc/kvm.c
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@ -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");
}
return ret;
}