diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2011-01-25 15:51:07 +0100 |
|---|---|---|
| committer | Kay Sievers <kay.sievers@vrfy.org> | 2011-01-25 16:14:04 +0100 |
| commit | 4e54f5334e130dc8f627c96ef2179ff4262b7791 (patch) | |
| tree | 64fdde91c48b465c8c4ab2fbb9481fb4269a50b1 /extras | |
| parent | 2514465f6a4ab61617482f068e475b945438c1f1 (diff) | |
extras: add rules for qemu guests
These patches enable usb autosuspend for the qemu emulated HID devices.
This reduces the cpu load for idle guests with a hid device attached
because the linux kernel will suspend the usb bus then and qemu can stop
running a 1000 Hz to emulate the (active) UHCI controller.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/qemu/42-qemu-usb.rules | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/extras/qemu/42-qemu-usb.rules b/extras/qemu/42-qemu-usb.rules new file mode 100644 index 0000000000..4fd53c7477 --- /dev/null +++ b/extras/qemu/42-qemu-usb.rules @@ -0,0 +1,13 @@ +# +# Enable autosuspend for qemu emulated usb hid devices. +# +# Note that there are buggy qemu versions which advertise remote +# wakeup support but don't actually implement it correctly. This +# is the reason why we need a match for the serial number here. +# The serial number "42" is used to tag the implementations where +# remote wakeup is working. +# + +ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Mouse", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto" +ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Tablet", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto" +CTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Keyboard", ATTR{serial}=="42", TEST=="power/control", ATTR{power/control}="auto" |