vmstate: add VMSTATE_UINT16_EQUAL[_V]

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

2 files changed, 27 insertions, 0 deletions

diff --git a/hw/hw.h b/hw/hw.h
index 0fda06aee3..b0a62df94f 100644
--- a/hw/hw.h
+++ b/hw/hw.h
@@ -322,6 +322,7 @@ extern const VMStateInfo vmstate_info_int32;
 extern const VMStateInfo vmstate_info_int64;
 
 extern const VMStateInfo vmstate_info_uint8_equal;
+extern const VMStateInfo vmstate_info_uint16_equal;
 extern const VMStateInfo vmstate_info_int32_equal;
 extern const VMStateInfo vmstate_info_int32_le;
 
@@ -560,6 +561,12 @@ extern const VMStateDescription vmstate_i2c_slave;
 #define VMSTATE_UINT8_EQUAL(_f, _s)                                   \
     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint8_equal, uint8_t)
 
+#define VMSTATE_UINT16_EQUAL(_f, _s)                                  \
+    VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint16_equal, uint16_t)
+
+#define VMSTATE_UINT16_EQUAL_V(_f, _s, _v)                            \
+    VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16_equal, uint16_t)
+
 #define VMSTATE_INT32_EQUAL(_f, _s)                                   \
     VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_equal, int32_t)
 
diff --git a/savevm.c b/savevm.c
index 6eca31a5d2..0db5fc7d0d 100644
--- a/savevm.c
+++ b/savevm.c
@@ -882,6 +882,26 @@ const VMStateInfo vmstate_info_uint8_equal = {
     .put  = put_uint8,
 };
 
+/* 16 bit unsigned int int. See that the received value is the same than the one
+   in the field */
+
+static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
+{
+    uint16_t *v = pv;
+    uint16_t v2;
+    qemu_get_be16s(f, &v2);
+
+    if (*v == v2)
+        return 0;
+    return -EINVAL;
+}
+
+const VMStateInfo vmstate_info_uint16_equal = {
+    .name = "uint16 equal",
+    .get  = get_uint16_equal,
+    .put  = put_uint16,
+};
+
 /* timers  */
 
 static int get_timer(QEMUFile *f, void *pv, size_t size)