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extras: add rules for qemu guests

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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>
This commit is contained in:
Gerd Hoffmann 2011-01-25 15:51:07 +01:00 committed by Kay Sievers
parent 2514465f6a
commit 4e54f5334e
3 changed files with 23 additions and 0 deletions
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5
Makefile.am
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@ -317,6 +317,11 @@ extras_v4l_id_v4l_id_LDADD = libudev/libudev-private.la
libexec_PROGRAMS += extras/v4l_id/v4l_id
dist_udevrules_DATA += extras/v4l_id/60-persistent-v4l.rules
# ------------------------------------------------------------------------------
# qemu -- qemu/kvm guest tweaks
# ------------------------------------------------------------------------------
dist_udevrules_DATA += extras/qemu/99-qemu-usb.rules
if ENABLE_EXTRAS
# ------------------------------------------------------------------------------
# conditional extras (need glib, libusb, libacl, ...)

13
extras/qemu/42-qemu-usb.rules Normal file
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@ -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"

5
rules/misc/30-kernel-compat.rules
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@ -97,4 +97,9 @@ SUBSYSTEM=="mmc", RUN+="/sbin/modprobe -b mmc_block"
SUBSYSTEM=="pnp", DRIVER!="?*", \
RUN{ignore_error}+="/bin/sh -c '/sbin/modprobe -a $$(while read id; do echo pnp:d$$id; done < /sys$devpath/id)'"
# see extras/qemu/42-qemu-usb.rules, version for 2.6.32 + older.
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Mouse", ATTR{serial}=="42", TEST=="power/level", ATTR{power/level}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Tablet", ATTR{serial}=="42", TEST=="power/level", ATTR{power/level}="auto"
ACTION=="add", SUBSYSTEM=="usb", ATTR{product}=="QEMU USB Keyboard", ATTR{serial}=="42", TEST=="power/level", ATTR{power/level}="auto"
LABEL="kernel_compat_end"