linux-kernel - [PATCH v2 8/8] KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHPKEYR in sync

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Date: Wed, 05 Jun 2024 13:07:49 +0000
From: Shivaprasad G Bhat <sbhat@...ux.ibm.com>
To: kvm@...r.kernel.org, linux-doc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Cc: pbonzini@...hat.com, naveen.n.rao@...ux.ibm.com,
        christophe.leroy@...roup.eu, corbet@....net, mpe@...erman.id.au,
        namhyung@...nel.org, npiggin@...il.com, pbonzini@...hat.com,
        sbhat@...ux.ibm.com, jniethe5@...il.com, atrajeev@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 8/8] KVM: PPC: Book3S HV nestedv2: Keep nested guest
 HASHPKEYR in sync

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

The patch takes care of this for the HASHPKEYR GSID.

Signed-off-by: Shivaprasad G Bhat <sbhat@...ux.ibm.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 bbff933f2ccc..ce61cb6fc9b9 100644
--- a/arch/powerpc/kvm/book3s_hv_nestedv2.c
+++ b/arch/powerpc/kvm/book3s_hv_nestedv2.c
@@ -199,6 +199,9 @@ static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb,
 		case KVMPPC_GSID_HASHKEYR:
 			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hashkeyr);
 			break;
+		case KVMPPC_GSID_HASHPKEYR:
+			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hashpkeyr);
+			break;
 		case KVMPPC_GSID_CIABR:
 			rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
 			break;
@@ -453,6 +456,9 @@ static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm,
 		case KVMPPC_GSID_HASHKEYR:
 			vcpu->arch.hashkeyr = kvmppc_gse_get_u64(gse);
 			break;
+		case KVMPPC_GSID_HASHPKEYR:
+			vcpu->arch.hashpkeyr = kvmppc_gse_get_u64(gse);
+			break;
 		case KVMPPC_GSID_CIABR:
 			vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
 			break;