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Subject: [PATCH v2 4/8] KVM: PPC: Book3S HV nestedv2: Keep nested guest DEXCR
 in sync
From: Shivaprasad G Bhat <sbhat@linux.ibm.com>
To: kvm@vger.kernel.org, linux-doc@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org
Cc: pbonzini@redhat.com, naveen.n.rao@linux.ibm.com,
        christophe.leroy@csgroup.eu, corbet@lwn.net, mpe@ellerman.id.au,
        namhyung@kernel.org, npiggin@gmail.com, pbonzini@redhat.com,
        sbhat@linux.ibm.com, jniethe5@gmail.com, atrajeev@linux.vnet.ibm.com,
        linux-kernel@vger.kernel.org
Date: Wed, 05 Jun 2024 13:07:04 +0000
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The nestedv2 APIs has the guest state element defined for DEXCR
for the save-restore with L0. However, its ignored in the code.

The patch takes care of this for the DEXCR GSID.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kvm/book3s_hv_nestedv2.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/kvm/book3s_hv_nestedv2.c b/arch/powerpc/kvm/book3s_hv_nestedv2.c
index 1091f7a83b25..d207a6d936ff 100644
--- a/arch/powerpc/kvm/book3s_hv_nestedv2.c
+++ b/arch/powerpc/kvm/book3s_hv_nestedv2.c
@@ -193,6 +193,9 @@ static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb,
 		case KVMPPC_GSID_DAWRX1:
 			rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx1);
 			break;
+		case KVMPPC_GSID_DEXCR:
+			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dexcr);
+			break;
 		case KVMPPC_GSID_CIABR:
 			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
 			break;
@@ -441,6 +444,9 @@ static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm,
 		case KVMPPC_GSID_DAWRX1:
 			vcpu->arch.dawrx1 = kvmppc_gse_get_u32(gse);
 			break;
+		case KVMPPC_GSID_DEXCR:
+			vcpu->arch.dexcr = kvmppc_gse_get_u64(gse);
+			break;
 		case KVMPPC_GSID_CIABR:
 			vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
 			break;