Move kvm_dirty_ring_supported() to migration-util.c. Similarly to
ufd_version_check(), this function is used during test definition so
put it in the utils file.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
 tests/qtest/migration-test.c           | 29 --------------------------
 tests/qtest/migration/migration-util.c | 29 ++++++++++++++++++++++++++
 tests/qtest/migration/migration-util.h |  1 +
 3 files changed, 30 insertions(+), 29 deletions(-)

diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index f1c1ca309a..ab7cbb8251 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -32,12 +32,6 @@
 # endif /* CONFIG_TASN1 */
 #endif /* CONFIG_GNUTLS */
 
-/* For dirty ring test; so far only x86_64 is supported */
-#if defined(__linux__) && defined(HOST_X86_64)
-#include "linux/kvm.h"
-#include <sys/ioctl.h>
-#endif
-
 unsigned start_address;
 unsigned end_address;
 static bool uffd_feature_thread_id;
@@ -3435,29 +3429,6 @@ static void test_dirty_limit(void)
     migrate_end(from, to, true);
 }
 
-static bool kvm_dirty_ring_supported(void)
-{
-#if defined(__linux__) && defined(HOST_X86_64)
-    int ret, kvm_fd = open("/dev/kvm", O_RDONLY);
-
-    if (kvm_fd < 0) {
-        return false;
-    }
-
-    ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, KVM_CAP_DIRTY_LOG_RING);
-    close(kvm_fd);
-
-    /* We test with 4096 slots */
-    if (ret < 4096) {
-        return false;
-    }
-
-    return true;
-#else
-    return false;
-#endif
-}
-
 int main(int argc, char **argv)
 {
     bool has_kvm, has_tcg;
diff --git a/tests/qtest/migration/migration-util.c b/tests/qtest/migration/migration-util.c
index 2ff8870fd5..525bf1eed4 100644
--- a/tests/qtest/migration/migration-util.c
+++ b/tests/qtest/migration/migration-util.c
@@ -28,6 +28,12 @@
 #include "qemu/userfaultfd.h"
 #endif
 
+/* For dirty ring test; so far only x86_64 is supported */
+#if defined(__linux__) && defined(HOST_X86_64)
+#include "linux/kvm.h"
+#include <sys/ioctl.h>
+#endif
+
 
 static char *SocketAddress_to_str(SocketAddress *addr)
 {
@@ -331,3 +337,26 @@ bool ufd_version_check(bool *uffd_feature_thread_id)
     return false;
 }
 #endif
+
+bool kvm_dirty_ring_supported(void)
+{
+#if defined(__linux__) && defined(HOST_X86_64)
+    int ret, kvm_fd = open("/dev/kvm", O_RDONLY);
+
+    if (kvm_fd < 0) {
+        return false;
+    }
+
+    ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, KVM_CAP_DIRTY_LOG_RING);
+    close(kvm_fd);
+
+    /* We test with 4096 slots */
+    if (ret < 4096) {
+        return false;
+    }
+
+    return true;
+#else
+    return false;
+#endif
+}
diff --git a/tests/qtest/migration/migration-util.h b/tests/qtest/migration/migration-util.h
index 2ab22e3fd5..f5f2e4650e 100644
--- a/tests/qtest/migration/migration-util.h
+++ b/tests/qtest/migration/migration-util.h
@@ -49,6 +49,7 @@ static inline bool probe_o_direct_support(const char *tmpfs)
 #endif
 
 bool ufd_version_check(bool *uffd_feature_thread_id);
+bool kvm_dirty_ring_supported(void);
 void migration_test_add(const char *path, void (*fn)(void));
 char *migrate_get_connect_uri(QTestState *who);
 void migrate_set_ports(QTestState *to, QList *channel_list);
-- 
2.35.3