This patch adds full emulation support for the mfcr instruction.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/include/asm/ppc-opcode.h | 1 +
arch/powerpc/kvm/emulate.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 3132bb9..ce135be 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -86,6 +86,7 @@
#define OP_TRAP_64 2
#define OP_31_XOP_TRAP 4
+#define OP_31_XOP_MFCR 19
#define OP_31_XOP_LWZX 23
#define OP_31_XOP_DCBST 54
#define OP_31_XOP_LWZUX 55
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index e688d85..33a34c3 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -473,6 +473,16 @@ int kvmppc_emulate_any_instruction(struct kvm_vcpu *vcpu)
emulated = kvmppc_emulate_load(vcpu, addr, &value, 4);
kvmppc_set_gpr(vcpu, get_rt(inst), value);
break;
+ case 31:
+ switch (get_xop(inst)) {
+ case OP_31_XOP_MFCR:
+ kvmppc_set_gpr(vcpu, get_rt(inst), kvmppc_get_cr(vcpu));
+ break;
+ default:
+ emulated = EMULATE_FAIL;
+ break;
+ }
+ break;
default:
emulated = EMULATE_FAIL;
break;
--
1.8.1.4
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