msix: add VMSTATE_MSIX_TEST

ivshmem is going to use MSIX state conditionally.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>

diff --git a/include/hw/pci/msix.h b/include/hw/pci/msix.h
index 954d82b350c5aee5ea19ef5b1a524d8c084712c2..72e5f931c52880afe57084f86925bc8fc4663aa6 100644 (file)
--- a/include/hw/pci/msix.h
+++ b/include/hw/pci/msix.h
@@ -46,12 +46,16 @@ void msix_unset_vector_notifiers(PCIDevice *dev);
 
 extern const VMStateDescription vmstate_msix;
 
-#define VMSTATE_MSIX(_field, _state) {                               \
-    .name       = (stringify(_field)),                               \
-    .size       = sizeof(PCIDevice),                                 \
-    .vmsd       = &vmstate_msix,                                     \
-    .flags      = VMS_STRUCT,                                        \
-    .offset     = vmstate_offset_value(_state, _field, PCIDevice),   \
+#define VMSTATE_MSIX_TEST(_field, _state, _test) {                   \
+    .name         = (stringify(_field)),                             \
+    .size         = sizeof(PCIDevice),                               \
+    .vmsd         = &vmstate_msix,                                   \
+    .flags        = VMS_STRUCT,                                      \
+    .offset       = vmstate_offset_value(_state, _field, PCIDevice), \
+    .field_exists = (_test)                                          \
 }
 
+#define VMSTATE_MSIX(_f, _s)                                         \
+    VMSTATE_MSIX_TEST(_f, _s, NULL)
+
 #endif