target/i386: kvm: Use symbolic constant for #DB/#BP exception constants

Reviewed-by: NNikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: NKrish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: NLiran Alon <liran.alon@oracle.com>
Message-Id: <20190619162140.133674-4-liran.alon@oracle.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

target/i386/kvm.c

@@ -3345,9 +3345,9 @@ static int kvm_guest_debug_workarounds(X86CPU *cpu)
     unsigned long reinject_trap = 0;
 
     if (!kvm_has_vcpu_events()) {
-        if (env->exception_injected == 1) {
+        if (env->exception_injected == EXCP01_DB) {
             reinject_trap = KVM_GUESTDBG_INJECT_DB;
-        } else if (env->exception_injected == 3) {
+        } else if (env->exception_injected == EXCP03_INT3) {
             reinject_trap = KVM_GUESTDBG_INJECT_BP;
         }
         env->exception_injected = -1;
@@ -3859,8 +3859,8 @@ static int kvm_handle_debug(X86CPU *cpu,
     int ret = 0;
     int n;
 
-    if (arch_info->exception == 1) {
-        if (arch_info->dr6 & (1 << 14)) {
+    if (arch_info->exception == EXCP01_DB) {
+        if (arch_info->dr6 & DR6_BS) {
             if (cs->singlestep_enabled) {
                 ret = EXCP_DEBUG;
             }