On Sat, Apr 16, 2016 at 01:26:43AM +0200, Adam Rutkowski wrote:
Hello,
I think this is the right place to write about this. From a few days I'm fighting with not USB-aware OS-es in QEMU (like Windows 98, IBM OS/2, MS-DOS etc.). When I assign real USB keyboard and mouse to VM, keyboard partially works in DOS (keys like Alt aren't working), but mouse doesn't work at all.
In my quick tests on freedos, both the usb keyboard alt key and usb mouse work. That said, I don't doubt old DOS device drivers and old OSes (eg, win98) would attempt to directly access the ps2 hardware and thus not benefit from the SeaBIOS USB drivers.
After starting, let's say Windows 98 Setup, keyboard stops working too. From my experience these peripherals works only in newer OSes like Windows 2000+ or Linux, because they initialize their own USB HID driver. I'm not using QEMU's emulated USB HID devices, because I utilize VGA passthrough, so I need direct access from guest machine.
Summarizing: is it possible to add full support for USB keyboard and mouse in SeaBIOS?
Unfortunately, emulating a ps2 keyboard/mouse in SeaBIOS is very difficult, and I don't think it's practical.
However, it should be easy to have QEMU emulate a ps2 keyboard/mouse. It should also be possible to do that emulation even if the VGA is in passthrough.
-Kevin