KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHKEYR in sync

The nestedv2 APIs has the guest state element defined for HASHKEYR for
the save-restore with L0. However, its ignored in the code.

The patch takes care of this for the HASHKEYR GSID.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/171759284380.1480.15665015792935543933.stgit@linux.ibm.com

Author: ShivaprasadGBhat

arch/powerpc/kvm/book3s_hv_nestedv2.c

@@ -196,6 +196,9 @@ static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb,
 		case KVMPPC_GSID_DEXCR:
 			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dexcr);
 			break;
+		case KVMPPC_GSID_HASHKEYR:
+			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hashkeyr);
+			break;
 		case KVMPPC_GSID_CIABR:
 			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
 			break;
@@ -451,6 +454,9 @@ static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm,
 		case KVMPPC_GSID_DEXCR:
 			vcpu->arch.dexcr = kvmppc_gse_get_u64(gse);
 			break;
+		case KVMPPC_GSID_HASHKEYR:
+			vcpu->arch.hashkeyr = kvmppc_gse_get_u64(gse);
+			break;
 		case KVMPPC_GSID_CIABR:
 			vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
 			break;