linux-kernel - [PATCH v2 6/8] KVM: PPC: Book3S HV nestedv2: Keep nested guest HASHKEYR in sync

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Message-ID: <171759284380.1480.15665015792935543933.stgit@linux.ibm.com>
Date: Wed, 05 Jun 2024 13:07:27 +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 6/8] 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@...ux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@...il.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 d207a6d936ff..bbff933f2ccc 100644
--- a/arch/powerpc/kvm/book3s_hv_nestedv2.c
+++ b/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;
@@ -447,6 +450,9 @@ 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;