The guest drivers should already know how to use async for revision 3.
But since it's still possible to have an older driver with revision 3
that doesn't check for the revision, require a new parameter
"force_async", which we can later turn to 1 by default.
Signed-off-by: Alon Levy <al...@redhat.com>
---
hw/qxl.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/hw/qxl.c b/hw/qxl.c
index 6c11e70..451e8e5 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1316,6 +1316,23 @@ static void ioport_write(void *opaque,
target_phys_addr_t addr,
return;
}
+ if (d->force_async && d->revision >= 3) {
+ switch (io_port) {
+ case QXL_IO_UPDATE_AREA:
+ case QXL_IO_MEMSLOT_ADD:
+ case QXL_IO_CREATE_PRIMARY:
+ case QXL_IO_DESTROY_PRIMARY:
+ case QXL_IO_DESTROY_SURFACE_WAIT:
+ case QXL_IO_DESTROY_ALL_SURFACES:
+ qxl_guest_bug(d, "sync io %d not supported for revision >= 3",
+ io_port);
+ return;
+ break;
+ default:
+ break;
+ }
+ }
+
/* we change the io_port to avoid ifdeffery in the main switch */
orig_io_port = io_port;
switch (io_port) {
@@ -2036,6 +2053,7 @@ static Property qxl_properties[] = {
DEFINE_PROP_UINT32("ram_size_mb", PCIQXLDevice, ram_size_mb, -1),
DEFINE_PROP_UINT32("vram_size_mb", PCIQXLDevice, vram32_size_mb, -1),
DEFINE_PROP_UINT32("vram64_size_mb", PCIQXLDevice, vram_size_mb, -1),
+ DEFINE_PROP_UINT32("force_async", PCIQXLDevice, force_async, 0),
DEFINE_PROP_END_OF_LIST(),
};
--
1.7.10.1
