From patchwork Tue May 20 14:00:47 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 350731 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3CAB5140083 for ; Wed, 21 May 2014 00:23:18 +1000 (EST) Received: from localhost ([::1]:53739 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wmkwl-0001w3-UG for incoming@patchwork.ozlabs.org; Tue, 20 May 2014 10:23:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WmkwS-0001eJ-D6 for qemu-devel@nongnu.org; Tue, 20 May 2014 10:23:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WmkwM-0007Gh-6z for qemu-devel@nongnu.org; Tue, 20 May 2014 10:22:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32774) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WmkwL-0007GO-VK for qemu-devel@nongnu.org; Tue, 20 May 2014 10:22:50 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s4KEMmw4005839 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 20 May 2014 10:22:49 -0400 Received: from nilsson.home.kraxel.org (ovpn-116-30.ams2.redhat.com [10.36.116.30]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s4KE0t77008425; Tue, 20 May 2014 10:00:56 -0400 Received: by nilsson.home.kraxel.org (Postfix, from userid 500) id 29EA98015A; Tue, 20 May 2014 16:00:51 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Tue, 20 May 2014 16:00:47 +0200 Message-Id: <1400594447-16637-7-git-send-email-kraxel@redhat.com> In-Reply-To: <1400594447-16637-1-git-send-email-kraxel@redhat.com> References: <1400594447-16637-1-git-send-email-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Gerd Hoffmann Subject: [Qemu-devel] [PATCH 6/6] docs: add multiseat.txt X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Howto on setting up multiseat for guests. Signed-off-by: Gerd Hoffmann --- docs/multiseat.txt | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 docs/multiseat.txt diff --git a/docs/multiseat.txt b/docs/multiseat.txt new file mode 100644 index 0000000..a6c71dd --- /dev/null +++ b/docs/multiseat.txt @@ -0,0 +1,76 @@ + +multiseat howto (with some multihead coverage) +============================================== + +host side +--------- + +First you must compile qemu with a user interface supporting +multihead/multiseat and input event routing. Right now this list is +pretty short: sdl2. + + ./configure --enable-sdl --with-sdlabi=2.0 + + +Next put together the qemu command line: + +qemu -enable-kvm -usb $memory $disk $whatever \ + -display sdl \ + -vga std \ + -device usb-tablet + +That is it for the first head, which will use the standard vga, the +standard ps/2 keyboard (implicitly there) and the usb-tablet. Now the +additional switches for the second head: + + -device pci-bridge,addr=12.0,chassis_nr=2,id=head.2 \ + -device secondary-vga,bus=head.2,addr=02.0,id=video.2 \ + -device nec-usb-xhci,bus=head.2,addr=0f.0,id=usb.2 \ + -device usb-kbd,bus=usb.2.0,port=1,display=video.2 \ + -device usb-tablet,bus=usb.2.0,port=2,display=video.2 + +This places a pci bridge in slot 12, connects a display adapter and +xhci (usb) controller to the bridge. Then it adds a usb keyboard and +usb mouse, both connected to the xhci and linked to the display. + +The "display=video2" sets up the input routing. Any input coming from +the window which belongs to the video.2 display adapter will be routed +to these input devices. + + +guest side +---------- + +You need a pretty recent linux guest. systemd with loginctl. kernel +3.14+ with CONFIG_DRM_BOCHS enabled. Fedora 20 will do. Must be +fully updated for the new kernel though, i.e. the live iso doesn't cut +it. + +Now we'll have to configure the guest. Boot and login. By default +all devices belong to seat0. You can use "loginctl seat-status seat0" +to list them all (and to get the sysfs paths for cut+paste). Now +we'll go assign all pci devices connected the pci bridge in slot 12 to +a new head: + +loginctl attach seat-qemu \ + /sys/devices/pci0000:00/0000:00:12.0/0000:01:02.0/drm/card1 +loginctl attach seat-qemu \ + /sys/devices/pci0000:00/0000:00:12.0/0000:01:02.0/graphics/fb1 +loginctl attach seat-qemu \ + /sys/devices/pci0000:00/0000:00:12.0/0000:01:0f.0/usb2 + +Use "loginctl seat-status seat-qemu" to check the result. It isn't +needed to assign the usb devices to the head individually, assigning a +usb (root) hub will automatically assign all usb devices connected to +it too. + +BTW: loginctl writes udev rules to /etc/udev/rules.d to make these +device assignments permanent, so you need to do this only once. + +Now simply restart gdm (rebooting will do too), and a login screen +should show up on the second head. + +Enjoy! + +-- +Gerd Hoffmann