KVM: PPC: emulate dcbst

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index 7a73b6f..631a265 100644
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -38,6 +38,7 @@
 
 #define OP_31_XOP_TRAP      4
 #define OP_31_XOP_LWZX      23
+#define OP_31_XOP_DCBST     54
 #define OP_31_XOP_TRAP_64   68
 #define OP_31_XOP_DCBF      86
 #define OP_31_XOP_LBZX      87
@@ -370,6 +371,7 @@
 			emulated = kvmppc_emulate_mtspr(vcpu, sprn, rs);
 			break;
 
+		case OP_31_XOP_DCBST:
 		case OP_31_XOP_DCBF:
 		case OP_31_XOP_DCBI:
 			/* Do nothing. The guest is performing dcbi because