ff89b8d8c2
We want ashmem to only be used via libcutils API, with long-term goal being deprecation of ashmem with memfd. To do that we route libcutils to a new source of ashmem fds. We then phase out uses of /dev/ashmem that doesn't go through libcutils using SELinux. In Q, we introduced ashmemd as the source of ashmem fds to libcutils. However, having a separate process and, consequently, binder hops to handle /dev/ashmem results in performance/memory overhead. To address the overhead, replace ashmemd with a duplicate of /dev/ashmem. Name it /dev/ashmem<boot_id>, where boot_id is a random number generated on each boot. This way we make sure that developers don't accidentally depend on /dev/ashmem<boot_id>, as that name can't be hardcoded. Bug: 139855428 Test: writing "add"/"remove" to /sys/class/misc/ashmem/uevent correctly adds/removes /dev/ashmem and /dev/ashmem/boot_id Change-Id: I36d23116048bfcd99903ba46cc133161835a2cfa
69 lines
2.5 KiB
Text
69 lines
2.5 KiB
Text
firmware_directories /etc/firmware/ /odm/firmware/ /vendor/firmware/ /firmware/image/
|
|
uevent_socket_rcvbuf_size 16M
|
|
|
|
subsystem graphics
|
|
devname uevent_devpath
|
|
dirname /dev/graphics
|
|
|
|
subsystem drm
|
|
devname uevent_devpath
|
|
dirname /dev/dri
|
|
|
|
subsystem input
|
|
devname uevent_devpath
|
|
dirname /dev/input
|
|
|
|
subsystem sound
|
|
devname uevent_devpath
|
|
dirname /dev/snd
|
|
|
|
# ueventd can only set permissions on device nodes and their associated
|
|
# sysfs attributes, not on arbitrary paths.
|
|
#
|
|
# format for /dev rules: devname mode uid gid
|
|
# format for /sys rules: nodename attr mode uid gid
|
|
# shortcut: "mtd@NN" expands to "/dev/mtd/mtdNN"
|
|
|
|
/dev/null 0666 root root
|
|
/dev/zero 0666 root root
|
|
/dev/full 0666 root root
|
|
/dev/ptmx 0666 root root
|
|
/dev/tty 0666 root root
|
|
/dev/random 0666 root root
|
|
/dev/urandom 0666 root root
|
|
# Make HW RNG readable by group system to let EntropyMixer read it.
|
|
/dev/hw_random 0440 root system
|
|
/dev/ashmem* 0666 root root
|
|
/dev/binder 0666 root root
|
|
/dev/hwbinder 0666 root root
|
|
/dev/vndbinder 0666 root root
|
|
|
|
/dev/pmsg0 0222 root log
|
|
|
|
# kms driver for drm based gpu
|
|
/dev/dri/* 0666 root graphics
|
|
|
|
# these should not be world writable
|
|
/dev/uhid 0660 uhid uhid
|
|
/dev/uinput 0660 uhid uhid
|
|
/dev/rtc0 0640 system system
|
|
/dev/tty0 0660 root system
|
|
/dev/graphics/* 0660 root graphics
|
|
/dev/input/* 0660 root input
|
|
/dev/v4l-touch* 0660 root input
|
|
/dev/snd/* 0660 system audio
|
|
/dev/bus/usb/* 0660 root usb
|
|
/dev/mtp_usb 0660 root mtp
|
|
/dev/usb_accessory 0660 root usb
|
|
/dev/tun 0660 system vpn
|
|
|
|
# CDMA radio interface MUX
|
|
/dev/ppp 0660 radio vpn
|
|
|
|
# sysfs properties
|
|
/sys/devices/platform/trusty.* trusty_version 0440 root log
|
|
/sys/devices/virtual/input/input* enable 0660 root input
|
|
/sys/devices/virtual/input/input* poll_delay 0660 root input
|
|
/sys/devices/virtual/usb_composite/* enable 0664 root system
|
|
/sys/devices/system/cpu/cpu* cpufreq/scaling_max_freq 0664 system system
|
|
/sys/devices/system/cpu/cpu* cpufreq/scaling_min_freq 0664 system system
|