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!");
+ }
return ret;
}
--
1.8.3.1
