KVM: PPC: Book3S HV nestedv2: Avoid msr check in kvmppc_handle_exit_hv()

The msr check in kvmppc_handle_exit_hv() is not needed for nestedv2 hosts,
skip the check to avoid a H_GUEST_GET_STATE hcall.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231201132618.555031-9-vaibhav@linux.ibm.com

Author: iamjpn

arch/powerpc/kvm/book3s_hv.c

@@ -1597,7 +1597,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu,
 	 * That can happen due to a bug, or due to a machine check
 	 * occurring at just the wrong time.
 	 */
-	if (__kvmppc_get_msr_hv(vcpu) & MSR_HV) {
+	if (!kvmhv_is_nestedv2() && (__kvmppc_get_msr_hv(vcpu) & MSR_HV)) {
 		printk(KERN_EMERG "KVM trap in HV mode!\n");
 		printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
 			vcpu->arch.trap, kvmppc_get_pc(vcpu),