KVM: PPC: Critical interrupt emulation support

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>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c
index 9eb9809..12834bb 100644 (file)
--- 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;