jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
qxl: introduce hardware revision 5
The only difference to hardware revision 4 is that the device doesn't
switch to VGA mode in case someone happens to touch a VGA register,
which should make things more robust in configurations with multiple
vga devices.
Swtiching back to VGA mode happens on reset, either full machine
reset or qxl device reset (QXL_IO_RESET ioport command).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-id: 20200206074358.4274-1-kraxel@redhat.com
+9
-2
+2
hw/core/machine.c
+2
hw/core/machine.c
···
34
34
{ "vhost-blk-device", "seg_max_adjust", "off"},
35
35
{ "usb-host", "suppress-remote-wake", "off" },
36
36
{ "usb-redir", "suppress-remote-wake", "off" },
37
+
{ "qxl", "revision", "4" },
38
+
{ "qxl-vga", "revision", "4" },
37
39
};
38
40
const size_t hw_compat_4_2_len = G_N_ELEMENTS(hw_compat_4_2);
39
41
+6
-1
hw/display/qxl.c
+6
-1
hw/display/qxl.c
···
1309
1309
PCIQXLDevice *qxl = container_of(vga, PCIQXLDevice, vga);
1310
1310
1311
1311
trace_qxl_io_write_vga(qxl->id, qxl_mode_to_string(qxl->mode), addr, val);
1312
-
if (qxl->mode != QXL_MODE_VGA) {
1312
+
if (qxl->mode != QXL_MODE_VGA &&
1313
+
qxl->revision <= QXL_REVISION_STABLE_V12) {
1313
1314
qxl_destroy_primary(qxl, QXL_SYNC);
1314
1315
qxl_soft_reset(qxl);
1315
1316
}
···
2119
2120
break;
2120
2121
case 4: /* qxl-4 */
2121
2122
pci_device_rev = QXL_REVISION_STABLE_V12;
2123
+
io_size = pow2ceil(QXL_IO_RANGE_SIZE);
2124
+
break;
2125
+
case 5: /* qxl-5 */
2126
+
pci_device_rev = QXL_REVISION_STABLE_V12 + 1;
2122
2127
io_size = pow2ceil(QXL_IO_RANGE_SIZE);
2123
2128
break;
2124
2129
default: