ppc: debug stub: Get trap instruction opcode from KVM

Get trap instruction opcode from KVM and this opcode will
be used for setting software breakpoint in following patch

Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-ppc/kvm.c

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 8c9e79c..126f7ee 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -72,6 +72,8 @@
 static int cap_htab_fd;
 static int cap_fixup_hcalls;
 
+static uint32_t debug_inst_opcode;
+
 /* XXX We have a race condition where we actually have a level triggered
  *     interrupt, but the infrastructure can't expose that yet, so the guest
  *     takes but ignores it, goes to sleep and never gets notified that there's
@@ -436,6 +438,8 @@
         break;
     }
 
+    kvm_get_one_reg(cs, KVM_REG_PPC_DEBUG_INST, &debug_inst_opcode);
+
     return ret;
 }