provide tests for pit in kernel and irqchip in kernel

KVM can have an in-kernel pit or irqchip. While we don't implement it
yet, having a way for test for it (that always returns zero) will allow us
to reuse code in qemu-kvm that tests for it.
Signed-off-by: NGlauber Costa <glommer@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

kvm-all.c

@@ -63,6 +63,8 @@ struct KVMState
 #ifdef KVM_CAP_SET_GUEST_DEBUG
     struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
 #endif
+    int irqchip_in_kernel;
+    int pit_in_kernel;
 };
 
 static KVMState *kvm_state;
@@ -162,6 +164,17 @@ static void on_vcpu(CPUState *env, void (*func)(void *data), void *data)
     abort();
 }
 
+int kvm_irqchip_in_kernel(void)
+{
+    return kvm_state->irqchip_in_kernel;
+}
+
+int kvm_pit_in_kernel(void)
+{
+    return kvm_state->pit_in_kernel;
+}
+
+
 int kvm_init_vcpu(CPUState *env)
 {
     KVMState *s = kvm_state;

kvm.h

@@ -60,6 +60,9 @@ int kvm_remove_breakpoint(CPUState *current_env, target_ulong addr,
 void kvm_remove_all_breakpoints(CPUState *current_env);
 int kvm_update_guest_debug(CPUState *env, unsigned long reinject_trap);
 
+int kvm_pit_in_kernel(void);
+int kvm_irqchip_in_kernel(void);
+
 /* internal API */
 
 struct KVMState;