kvm: Dump guest rIP when the guest tried something unsupported

It looks like this in action:

  kvm [5197]: vcpu0, guest rIP: 0xffffffff810187ba unhandled rdmsr: 0xc001102

and helps to pinpoint quickly where in the guest we did the unsupported
thing.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 2969c474a399..61c3e6c69f27 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -447,7 +447,8 @@ struct kvm {
 
 /* The guest did something we don't support. */
 #define vcpu_unimpl(vcpu, fmt, ...)                                     \
-        kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
+        kvm_pr_unimpl("vcpu%i, guest rIP: 0x%lx " fmt,                  \
+                        (vcpu)->vcpu_id, kvm_rip_read(vcpu), ## __VA_ARGS__)
 
 #define vcpu_debug(vcpu, fmt, ...)                                      \
         kvm_debug("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)