[Qemu-devel] Fwd: [vfio-users] [PATCH v2 1/3] input: add qemu_input_qcode_to_linux + qemu_input_linux_to_qcode

[sL1pKn07 SpinFlo]

2016-01-04 14:19 GMT+01:00 Jonathan Scruggs <address@hidden>:
> Oh. I just changed /dev/input/eventx (replace x with correct number for my
> devices) to permissions of 666 and it worked. I guess I had to change the
> conf file and change the permissions. Is there a way to make the devices
> work with qemu? The permission user is root and group of input for all the
> eventx devices. Do I need a udev script or is there a qemu user that can be
> added to the group of input?
>
> Thanks
>
> On 4 January 2016 at 11:56, Gerd Hoffmann <address@hidden> wrote:
>>
>> On Mo, 2016-01-04 at 10:10 +0000, Jonathan Scruggs wrote:
>> > Hi,
>> >
>> >
>> > I tried these patches with qemu 2.5.0 on Gentoo and libvirt. I get the
>> > following error:
>> > Error starting domain: internal error: early end of file from monitor:
>> > possible problem:
>> > 2015-12-22T21:51:20.659520Z qemu-system-x86_64:
>> > -input-linux
>> > /dev/input/by-path/pci-0000:00:14.0-usb-0:12:1.0-event-kbd,grab-all=on:
>> > Could not open '/dev/input/by-path/pci-0000:00:14.0-usb-0:12:1.0-event-kbd'
>> >
>> >
>> > I also tried setting /dev/input/event9 to permissions of 666 to see if
>> > it was a permission error, but the same thing happened. Any help would
>> > be appreciated.
>>
>> libvirt uses cgroups to restrict qemu.  You can tweak cgroup_controllers
>> in /etc/libvirt/qemu.conf, when you remove "devices" controller it
>> should work (unless something else like selinux or apparmor applies
>> additional restrictions).
>>
>> HTH,
>>   Gerd
>>

I tried add myself to input group. don't work.
not test if add root user to input group works


but can confirm if change all /dev/input/eventx to 0666 works the
keyboard/mouse on the guest

i have in the qemu.conf:

use r= root
group = kvm
cgroup_controllers = [ "cpu", "memory", "blkio", "cpuset", "cpuacct" ]

and add myself to groups libvirt (created by libvirt) and kvm (created by qemu)