From: Yuan Yao <yuan.yao@intel.com>

This interface is designed to setup the MemoryRegion::debug_ops.

Also introduced 2 wrapper functions for installing/calling the
KVMState::set_mr_debug_ops from different targets easily.

Signed-off-by: Yuan Yao <yuan.yao@intel.com>

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index b6d5c9fd7d..1482561bd7 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -129,6 +129,8 @@ struct KVMState
         KVMMemoryListener *ml;
         AddressSpace *as;
     } *as;
+
+    set_memory_region_debug_ops set_mr_debug_ops;
 };
 
 KVMState *kvm_state;
@@ -3157,6 +3159,21 @@ static void kvm_set_kernel_irqchip(Object *obj, Visitor *v,
     }
 }
 
+void kvm_setup_memory_region_debug_ops(struct KVMState *s,
+                                       set_memory_region_debug_ops new_ops)
+{
+    if (s)
+        s->set_mr_debug_ops = new_ops;
+}
+
+void kvm_set_memory_region_debug_ops(void *handle, MemoryRegion *mr)
+{
+    if (!kvm_state || !kvm_state->set_mr_debug_ops)
+        return;
+
+    kvm_state->set_mr_debug_ops(handle, mr);
+}
+
 bool kvm_kernel_irqchip_allowed(void)
 {
     return kvm_state->kernel_irqchip_allowed;
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index 0f17acfac0..f1c57ad8d7 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -148,4 +148,15 @@ bool kvm_arm_supports_user_irq(void)
 {
     return false;
 }
+
+void kvm_setup_memory_region_debug_ops(struct KVMState *s,
+                                       set_memory_region_debug_ops new_ops)
+{
+
+}
+
+void kvm_set_memory_region_debug_ops(void *handle, MemoryRegion *mr)
+{
+
+}
 #endif
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a1ab1ee12d..64685cad57 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -547,4 +547,9 @@ bool kvm_cpu_check_are_resettable(void);
 
 bool kvm_arch_cpu_check_are_resettable(void);
 
+typedef void (*set_memory_region_debug_ops)(void *handle, MemoryRegion *mr);
+void kvm_setup_memory_region_debug_ops(struct KVMState *s, set_memory_region_debug_ops new_ops);
+
+void kvm_set_memory_region_debug_ops(void *handle, MemoryRegion *mr);
+
 #endif
-- 
2.20.1