VGA: Flush coalesced MMIO on related MMIO/PIO accesses

In preparation of stopping to flush coalesced MMIO unconditionally on
vmexits, mark VGA MMIO and PIO regions as synchronous /wrt coalesced
MMIO and flush the buffer explicitly on PIO accesses that do not use
generic memory regions yet.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/qxl.c b/hw/qxl.c
index 5b3f484266..43d6a67ecc 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1910,6 +1910,7 @@ static int qxl_init_common(PCIQXLDevice *qxl)
     if (qxl->id == 0) {
         vga_dirty_log_start(&qxl->vga);
     }
+    memory_region_set_flush_coalesced(&qxl->io_bar);
 
 
     pci_register_bar(&qxl->pci, QXL_IO_RANGE_INDEX,