projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 8977bd11 GH |
1 | |
| 2 | multiseat howto (with some multihead coverage) | |
| 3 | ============================================== | |
| 4 | ||
| 5 | host side | |
| 6 | --------- | |
| 7 | ||
| 8 | First you must compile qemu with a user interface supporting | |
| 9 | multihead/multiseat and input event routing. Right now this list is | |
| 10 | pretty short: sdl2. | |
| 11 | ||
| 12 | ./configure --enable-sdl --with-sdlabi=2.0 | |
| 13 | ||
| 14 | ||
| 15 | Next put together the qemu command line: | |
| 16 | ||
| 17 | qemu -enable-kvm -usb $memory $disk $whatever \ | |
| 18 | -display sdl \ | |
| 19 | -vga std \ | |
| 20 | -device usb-tablet | |
| 21 | ||
| 22 | That is it for the first head, which will use the standard vga, the | |
| 23 | standard ps/2 keyboard (implicitly there) and the usb-tablet. Now the | |
| 24 | additional switches for the second head: | |
| 25 | ||
| 26 | -device pci-bridge,addr=12.0,chassis_nr=2,id=head.2 \ | |
| 27 | -device secondary-vga,bus=head.2,addr=02.0,id=video.2 \ | |
| 28 | -device nec-usb-xhci,bus=head.2,addr=0f.0,id=usb.2 \ | |
| 29 | -device usb-kbd,bus=usb.2.0,port=1,display=video.2 \ | |
| 30 | -device usb-tablet,bus=usb.2.0,port=2,display=video.2 | |
| 31 | ||
| 32 | This places a pci bridge in slot 12, connects a display adapter and | |
| 33 | xhci (usb) controller to the bridge. Then it adds a usb keyboard and | |
| 34 | usb mouse, both connected to the xhci and linked to the display. | |
| 35 | ||
| 36 | The "display=video2" sets up the input routing. Any input coming from | |
| 37 | the window which belongs to the video.2 display adapter will be routed | |
| 38 | to these input devices. | |
| 39 | ||
| 40 | ||
| 41 | guest side | |
| 42 | ---------- | |
| 43 | ||
| 44 | You need a pretty recent linux guest. systemd with loginctl. kernel | |
| 45 | 3.14+ with CONFIG_DRM_BOCHS enabled. Fedora 20 will do. Must be | |
| 46 | fully updated for the new kernel though, i.e. the live iso doesn't cut | |
| 47 | it. | |
| 48 | ||
| 3503206a GH |
49 | Now we'll have to configure the guest. Boot and login. "lspci -vt" |
| 50 | should list the pci bridge with the display adapter and usb controller: | |
| 51 | ||
| 52 | [root@fedora ~]# lspci -vt | |
| 53 | -[0000:00]-+-00.0 Intel Corporation 440FX - 82441FX PMC [Natoma] | |
| 54 | [ ... ] | |
| 55 | \-12.0-[01]--+-02.0 Device 1234:1111 | |
| 56 | \-0f.0 NEC Corporation USB 3.0 Host Controller | |
| 57 | ||
| 58 | Good. Now lets tell the system that the pci bridge and all devices | |
| 59 | below it belong to a separate seat by dropping a file into | |
| 60 | /etc/udev/rules.d: | |
| 61 | ||
| 62 | [root@fedora ~]# cat /etc/udev/rules.d/70-qemu-autoseat.rules | |
| 63 | SUBSYSTEMS=="pci", DEVPATH=="*/0000:00:12.0", TAG+="seat", ENV{ID_AUTOSEAT}="1" | |
| 64 | ||
| 65 | Reboot. System should come up with two seats. With loginctl you can | |
| 66 | check the configuration: | |
| 67 | ||
| 68 | [root@fedora ~]# loginctl list-seats | |
| 69 | SEAT | |
| 70 | seat0 | |
| 71 | seat-pci-pci-0000_00_12_0 | |
| 72 | ||
| 73 | 2 seats listed. | |
| 74 | ||
| 75 | You can use "loginctl seat-status seat-pci-pci-0000_00_12_0" to list | |
| 76 | the devices attached to the seat. | |
| 77 | ||
| 78 | Background info is here: | |
| 79 | http://www.freedesktop.org/wiki/Software/systemd/multiseat/ | |
| 8977bd11 GH |
80 | |
| 81 | Enjoy! | |
| 82 | ||
| 83 | -- | |
| 84 | Gerd Hoffmann <[email protected]> |