qxl: stop using non revision 4 rom fields for revision < 4

Signed-off-by: NAlon Levy <alevy@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/qxl.c

@@ -945,6 +945,12 @@ static void interface_set_client_capabilities(QXLInstance *sin,
 {
     PCIQXLDevice *qxl = container_of(sin, PCIQXLDevice, ssd.qxl);
 
+    if (qxl->revision < 4) {
+        trace_qxl_set_client_capabilities_unsupported_by_revision(qxl->id,
+                                                              qxl->revision);
+        return;
+    }
+
     if (runstate_check(RUN_STATE_INMIGRATE) ||
         runstate_check(RUN_STATE_POSTMIGRATE)) {
         return;
@@ -979,6 +985,11 @@ static int interface_client_monitors_config(QXLInstance *sin,
     QXLRom *rom = memory_region_get_ram_ptr(&qxl->rom_bar);
     int i;
 
+    if (qxl->revision < 4) {
+        trace_qxl_client_monitors_config_unsupported_by_device(qxl->id,
+                                                               qxl->revision);
+        return 0;
+    }
     /*
      * Older windows drivers set int_mask to 0 when their ISR is called,
      * then later set it to ~0. So it doesn't relate to the actual interrupts

trace-events

@@ -1029,8 +1029,10 @@ qxl_send_events_vm_stopped(int qid, uint32_t events) "%d %d"
 qxl_set_guest_bug(int qid) "%d"
 qxl_interrupt_client_monitors_config(int qid, int num_heads, void *heads) "%d %d %p"
 qxl_client_monitors_config_unsupported_by_guest(int qid, uint32_t int_mask, void *client_monitors_config) "%d %X %p"
+qxl_client_monitors_config_unsupported_by_device(int qid, int revision) "%d revision=%d"
 qxl_client_monitors_config_capped(int qid, int requested, int limit) "%d %d %d"
 qxl_client_monitors_config_crc(int qid, unsigned size, uint32_t crc32) "%d %u %u"
+qxl_set_client_capabilities_unsupported_by_revision(int qid, int revision) "%d revision=%d"
 
 # hw/qxl-render.c
 qxl_render_blit_guest_primary_initialized(void) ""