Patchwork [1/2] KVM: PPC: Critical interrupt emulation support

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Submitter Bharat Bhushan
Date June 28, 2012, 5:37 a.m.
Message ID <1340861852-31121-1-git-send-email-Bharat.Bhushan@freescale.com>
Download mbox | patch
Permalink /patch/167795/
State New
Headers show

Comments

Bharat Bhushan - June 28, 2012, 5:37 a.m.
rfci instruction and CSRR0/1 registers are emulated.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
---
 arch/powerpc/kvm/booke_emulate.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
Alexander Graf - July 6, 2012, 2:54 p.m.
On 28.06.2012, at 07:37, Bharat Bhushan wrote:

> rfci instruction and CSRR0/1 registers are emulated.
> 
> Signed-off-by: Scott Wood <scottwood@freescale.com>
> Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
> Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>

Thanks, applied to kvm-ppc-next.


Alex

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Patch

diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c
index 9eb9809..12834bb 100644
--- a/arch/powerpc/kvm/booke_emulate.c
+++ b/arch/powerpc/kvm/booke_emulate.c
@@ -24,6 +24,7 @@ 
 #include "booke.h"
 
 #define OP_19_XOP_RFI     50
+#define OP_19_XOP_RFCI    51
 
 #define OP_31_XOP_MFMSR   83
 #define OP_31_XOP_WRTEE   131
@@ -36,6 +37,12 @@  static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
 	kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
 }
 
+static void kvmppc_emul_rfci(struct kvm_vcpu *vcpu)
+{
+	vcpu->arch.pc = vcpu->arch.csrr0;
+	kvmppc_set_msr(vcpu, vcpu->arch.csrr1);
+}
+
 int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
                             unsigned int inst, int *advance)
 {
@@ -52,6 +59,12 @@  int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
 			*advance = 0;
 			break;
 
+		case OP_19_XOP_RFCI:
+			kvmppc_emul_rfci(vcpu);
+			kvmppc_set_exit_type(vcpu, EMULATED_RFCI_EXITS);
+			*advance = 0;
+			break;
+
 		default:
 			emulated = EMULATE_FAIL;
 			break;
@@ -113,6 +126,12 @@  int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 	case SPRN_ESR:
 		vcpu->arch.shared->esr = spr_val;
 		break;
+	case SPRN_CSRR0:
+		vcpu->arch.csrr0 = spr_val;
+		break;
+	case SPRN_CSRR1:
+		vcpu->arch.csrr1 = spr_val;
+		break;
 	case SPRN_DBCR0:
 		vcpu->arch.dbcr0 = spr_val;
 		break;
@@ -232,6 +251,12 @@  int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
 	case SPRN_ESR:
 		*spr_val = vcpu->arch.shared->esr;
 		break;
+	case SPRN_CSRR0:
+		*spr_val = vcpu->arch.csrr0;
+		break;
+	case SPRN_CSRR1:
+		*spr_val = vcpu->arch.csrr1;
+		break;
 	case SPRN_DBCR0:
 		*spr_val = vcpu->arch.dbcr0;
 		break;