[PULL 30/33] accel/kvm/kvm-all: Introduce kvm_dirty_ring_size function

[Dr. David Alan Gilbert (git)]

From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>

Introduce kvm_dirty_ring_size util function to help calculate
dirty ring ful time.

Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Acked-by: Peter Xu <peterx@redhat.com>
Message-Id: 
<c99e7851c2e2b99312cfbabe4d1f6379a3da8a44.1652931128.git.huangy81@chinatelecom.cn>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  dgilbert: Fixed up excess #endif
---
 accel/kvm/kvm-all.c    | 5 +++++
 accel/stubs/kvm-stub.c | 5 +++++
 include/sysemu/kvm.h   | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 672ed004ab..59b8ea1a05 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2318,6 +2318,11 @@ static void query_stats_cb(StatsResultList **result, 
StatsTarget target,
                            strList *names, strList *targets, Error **errp);
 static void query_stats_schemas_cb(StatsSchemaList **result, Error **errp);
 
+uint32_t kvm_dirty_ring_size(void)
+{
+    return kvm_state->kvm_dirty_ring_size;
+}
+
 static int kvm_init(MachineState *ms)
 {
     MachineClass *mc = MACHINE_GET_CLASS(ms);
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index 3345882d85..2ac5f9c036 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -148,3 +148,8 @@ bool kvm_dirty_ring_enabled(void)
 {
     return false;
 }
+
+uint32_t kvm_dirty_ring_size(void)
+{
+    return 0;
+}
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a783c78868..efd6dee818 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -582,4 +582,6 @@ bool kvm_cpu_check_are_resettable(void);
 bool kvm_arch_cpu_check_are_resettable(void);
 
 bool kvm_dirty_ring_enabled(void);
+
+uint32_t kvm_dirty_ring_size(void);
 #endif
-- 
2.36.1