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Josh Poimboeuf d83a7cb375 livepatch: change to a per-task consistency model 
Change livepatch to use a basic per-task consistency model.  This is the
foundation which will eventually enable us to patch those ~10% of
security patches which change function or data semantics.  This is the
biggest remaining piece needed to make livepatch more generally useful.

This code stems from the design proposal made by Vojtech [1] in November
2014.  It's a hybrid of kGraft and kpatch: it uses kGraft's per-task
consistency and syscall barrier switching combined with kpatch's stack
trace switching.  There are also a number of fallback options which make
it quite flexible.

Patches are applied on a per-task basis, when the task is deemed safe to
switch over.  When a patch is enabled, livepatch enters into a
transition state where tasks are converging to the patched state.
Usually this transition state can complete in a few seconds.  The same
sequence occurs when a patch is disabled, except the tasks converge from
the patched state to the unpatched state.

An interrupt handler inherits the patched state of the task it
interrupts.  The same is true for forked tasks: the child inherits the
patched state of the parent.

Livepatch uses several complementary approaches to determine when it's
safe to patch tasks:

1. The first and most effective approach is stack checking of sleeping
   tasks.  If no affected functions are on the stack of a given task,
   the task is patched.  In most cases this will patch most or all of
   the tasks on the first try.  Otherwise it'll keep trying
   periodically.  This option is only available if the architecture has
   reliable stacks (HAVE_RELIABLE_STACKTRACE).

2. The second approach, if needed, is kernel exit switching.  A
   task is switched when it returns to user space from a system call, a
   user space IRQ, or a signal.  It's useful in the following cases:

   a) Patching I/O-bound user tasks which are sleeping on an affected
      function.  In this case you have to send SIGSTOP and SIGCONT to
      force it to exit the kernel and be patched.
   b) Patching CPU-bound user tasks.  If the task is highly CPU-bound
      then it will get patched the next time it gets interrupted by an
      IRQ.
   c) In the future it could be useful for applying patches for
      architectures which don't yet have HAVE_RELIABLE_STACKTRACE.  In
      this case you would have to signal most of the tasks on the
      system.  However this isn't supported yet because there's
      currently no way to patch kthreads without
      HAVE_RELIABLE_STACKTRACE.

3. For idle "swapper" tasks, since they don't ever exit the kernel, they
   instead have a klp_update_patch_state() call in the idle loop which
   allows them to be patched before the CPU enters the idle state.

   (Note there's not yet such an approach for kthreads.)

All the above approaches may be skipped by setting the 'immediate' flag
in the 'klp_patch' struct, which will disable per-task consistency and
patch all tasks immediately.  This can be useful if the patch doesn't
change any function or data semantics.  Note that, even with this flag
set, it's possible that some tasks may still be running with an old
version of the function, until that function returns.

There's also an 'immediate' flag in the 'klp_func' struct which allows
you to specify that certain functions in the patch can be applied
without per-task consistency.  This might be useful if you want to patch
a common function like schedule(), and the function change doesn't need
consistency but the rest of the patch does.

For architectures which don't have HAVE_RELIABLE_STACKTRACE, the user
must set patch->immediate which causes all tasks to be patched
immediately.  This option should be used with care, only when the patch
doesn't change any function or data semantics.

In the future, architectures which don't have HAVE_RELIABLE_STACKTRACE
may be allowed to use per-task consistency if we can come up with
another way to patch kthreads.

The /sys/kernel/livepatch/<patch>/transition file shows whether a patch
is in transition.  Only a single patch (the topmost patch on the stack)
can be in transition at a given time.  A patch can remain in transition
indefinitely, if any of the tasks are stuck in the initial patch state.

A transition can be reversed and effectively canceled by writing the
opposite value to the /sys/kernel/livepatch/<patch>/enabled file while
the transition is in progress.  Then all the tasks will attempt to
converge back to the original patch state.

[1] https://lkml.kernel.org/r/20141107140458.GA21774@suse.cz

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Ingo Molnar <mingo@kernel.org>        # for the scheduler changes
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-03-08 09:36:21 +01:00
..
configfs-acpi ACPI: add support for loading SSDTs via configfs 2016-07-08 21:52:36 +02:00
configfs-iio Documentation: iio: Add IIO software devices docs 2016-05-04 11:44:15 +01:00
configfs-rdma_cm IB/cma: Add default RoCE TOS to CMA configfs 2017-02-15 09:51:28 -05:00
configfs-spear-pcie-gadget Pratyush Anand has moved 2015-06-25 17:00:38 -07:00
configfs-stp-policy stm class: Introduce an abstraction for System Trace Module devices 2015-10-04 20:28:58 +01:00
configfs-usb-gadget usb: gadget: configfs: OS Extended Properties descriptors support 2014-05-14 09:39:51 -05:00
configfs-usb-gadget-acm Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-ecm Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-eem Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-ffs Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-hid usb: gadget: hid: add configfs support 2014-11-06 16:18:19 -06:00
configfs-usb-gadget-loopback Doc: ABI: testing: configfs-usb-gadget-loopback 2015-07-31 09:02:06 -05:00
configfs-usb-gadget-mass-storage Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-midi usb: gadget: f_midi: add configfs support 2014-11-05 13:37:17 -06:00
configfs-usb-gadget-ncm Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-obex Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-phonet Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-printer usb: gadget: printer: add configfs support 2015-03-10 15:33:41 -05:00
configfs-usb-gadget-rndis Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-serial Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-sourcesink Doc: ABI: configfs-usb-gadget-sourcesink: add two entries for depth of queue 2015-12-15 09:12:41 -06:00
configfs-usb-gadget-subset Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/ 2014-01-29 16:22:40 -08:00
configfs-usb-gadget-tcm usb: gadget: f_tcm: add configfs support 2015-12-20 19:40:45 -08:00
configfs-usb-gadget-uac1 usb: gadget: f_uac1: add configfs support 2014-08-20 14:05:21 -05:00
configfs-usb-gadget-uac2 usb: gadget: f_uac2: add configfs support 2014-08-20 14:04:42 -05:00
configfs-usb-gadget-uvc Documentation: configfs-usb-gadget-uvc: fix kernel version 2016-05-31 11:12:58 +03:00
debugfs-driver-genwqe GenWQE Debugfs interfaces 2013-12-18 16:51:15 -08:00
debugfs-ec
debugfs-ideapad
debugfs-olpc
debugfs-pfo-nx-crypto
debugfs-pktcdvd
dev-kmsg printk: implement support for extended console drivers 2015-06-25 17:00:38 -07:00
evm
gpio-cdev gpio: add a userspace character device ABI 2016-02-09 11:09:52 +01:00
ima_policy ima: support for kexec image and initramfs 2016-02-21 09:06:16 -05:00
procfs-diskstats
pstore pstore: Create a convenient mount point for pstore 2013-02-12 13:07:22 -08:00
sysfs-ata libata: Fix sysfs documentation bug 2015-05-06 10:28:39 -04:00
sysfs-block block: add support for REQ_OP_WRITE_ZEROES 2016-12-01 07:58:40 -07:00
sysfs-block-bcache bcache: A block layer cache 2013-03-23 16:11:31 -07:00
sysfs-block-dm dm: add 'use_blk_mq' module param and expose in per-device ro sysfs attr 2015-04-15 12:10:17 -04:00
sysfs-block-rssd
sysfs-block-zram zram: remove obsolete sysfs attrs 2017-02-22 16:41:30 -08:00
sysfs-bus-acpi ACPI: Add sysfs ABI documentation 2013-06-21 00:13:15 +02:00
sysfs-bus-amba ARM: 8256/1: driver coamba: add device binding path 'driver_override' 2015-02-10 10:23:15 +00:00
sysfs-bus-bcma
sysfs-bus-coresight-devices-etb10 coresight: etb10: splitting sysFS "status" entry 2016-05-01 14:12:14 -07:00
sysfs-bus-coresight-devices-etm3x coresight: etm3x: adding documentation for sysFS's cpu interface 2015-10-17 22:03:00 -07:00
sysfs-bus-coresight-devices-etm4x coresight: etm4x: adding config and traceid registers 2016-05-01 14:12:14 -07:00
sysfs-bus-coresight-devices-funnel coresight: Adding ABI documentation 2014-11-26 19:27:28 -08:00
sysfs-bus-coresight-devices-stm coresight: stm: adding driver for CoreSight STM component 2016-05-03 14:59:30 -07:00
sysfs-bus-coresight-devices-tmc coresight: tmc: adding sysFS management entries 2016-05-03 14:59:30 -07:00
sysfs-bus-css
sysfs-bus-event_source-devices-events perf Documentation: Add event parameters 2015-01-21 13:24:33 -03:00
sysfs-bus-event_source-devices-format perf: Expand definition of sysfs format attribute 2013-05-29 16:11:40 +03:00
sysfs-bus-event_source-devices-hv_24x7 Documentation: fix common spelling mistakes 2016-04-28 07:51:59 -06:00
sysfs-bus-event_source-devices-hv_gpci powerpc: Update contact info in Documentation files 2014-10-07 16:58:06 +11:00
sysfs-bus-fcoe Doc:ABI/testing: Fix typo in sysfs-bus-fcoe 2015-06-22 10:35:05 -06:00
sysfs-bus-fsl-mc staging: fsl-mc: add sysfs ABI doc 2016-12-08 21:00:08 +01:00
sysfs-bus-hsi
sysfs-bus-i2c-devices-bq32k rtc: bq32000: add support to enable disable the trickle charge FET bypass 2017-02-01 12:44:23 +01:00
sysfs-bus-i2c-devices-fsa9480
sysfs-bus-i2c-devices-hm6352
sysfs-bus-i2c-devices-lm3533
sysfs-bus-iio iio: Documentation: Add proximity unit 2017-01-14 12:58:00 +00:00
sysfs-bus-iio-accel-bmc150 iio: accel: BMC150 accel documentation 2014-08-07 11:44:45 +01:00
sysfs-bus-iio-adc-envelope-detector iio: envelope-detector: ADC driver based on a DAC and a comparator 2016-11-13 13:07:17 +00:00
sysfs-bus-iio-adc-hi8435 iio: adc: hi8435: Holt HI-8435 threshold detector 2015-09-23 20:23:18 +01:00
sysfs-bus-iio-adc-stm32 iio: adc: stm32: add trigger polarity extended attribute 2017-01-28 18:24:57 +00:00
sysfs-bus-iio-chemical-vz89x iio: chemical: add SGX VZ89x VOC sensor support 2015-09-23 20:23:26 +01:00
sysfs-bus-iio-counter-104-quad-8 iio: 104-quad-8: Add IIO support for the ACCES 104-QUAD-8 2016-10-01 17:06:21 +01:00
sysfs-bus-iio-cros-ec iio: cros_ec_sensors_core: Add common functions for the ChromeOS EC Sensor Hub. 2016-10-25 18:20:05 +01:00
sysfs-bus-iio-dac-dpot-dac iio: dpot-dac: DAC driver based on a digital potentiometer 2016-11-13 13:07:15 +00:00
sysfs-bus-iio-distance-srf08 iio: distance: srf08: add driver ABI documentation 2017-01-28 16:38:33 +00:00
sysfs-bus-iio-frequency-ad9523 iio: move ABI specification for store_eeprom; is used by ad9523, mcp4725 and ds1077 devices 2013-08-03 18:40:31 +01:00
sysfs-bus-iio-frequency-adf4350 iio: fix typo, Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4350 2013-08-03 18:40:32 +01:00
sysfs-bus-iio-gyro-bmg160 iio:gyro:bmg160 documentation 2014-08-26 18:37:50 +01:00
sysfs-bus-iio-health-afe440x iio: health/afe440x: Make gain settings a modifier for the stages 2016-05-04 11:11:30 +01:00
sysfs-bus-iio-humidity-hdc100x iio: humidity: add HDC100x support 2015-09-23 20:23:19 +01:00
sysfs-bus-iio-ina2xx-adc iio: ina2xx: add ABI documentation entry sysfs-bus-iio-ina2xx-adc 2015-12-19 15:08:00 +00:00
sysfs-bus-iio-light-isl29018 staging: iio: isl29018: add ABI documentation for infrared suppression 2016-10-23 19:33:55 +01:00
sysfs-bus-iio-light-lm3533-als
sysfs-bus-iio-light-tsl2583 staging: iio: tsl2583: move out of staging 2016-11-13 13:07:33 +00:00
sysfs-bus-iio-magnetometer-hmc5843 iio: hmc5843: Add ABI documentation file for hmc5843 2016-02-21 20:22:23 +00:00
sysfs-bus-iio-meas-spec Add ms8607 meas-spec driver support 2015-10-11 10:21:21 +01:00
sysfs-bus-iio-mpu6050 Invensense MPU6050 Device Driver. 2013-02-10 17:42:43 +00:00
sysfs-bus-iio-potentiometer-mcp4531 iio: mcp4531: provide range of available raw values 2016-11-13 11:40:26 +00:00
sysfs-bus-iio-proximity-as3935 iio: proximity: as3935: correct IIO_CHAN_INFO_RAW output 2016-05-22 20:53:36 +01:00
sysfs-bus-iio-timer-stm32 iio: Add STM32 timer trigger driver 2017-01-25 16:11:56 +00:00
sysfs-bus-iio-trigger-sysfs Documentation: iio-trig-sysfs: Add remove_trigger attribute ABI 2015-08-16 10:51:23 +01:00
sysfs-bus-iio-vf610 iio: dac: vf610_dac: Add IIO DAC driver for Vybrid SoC 2016-02-24 20:52:55 +00:00
sysfs-bus-intel_th-devices-gth intel_th: Add Global Trace Hub driver 2015-10-04 20:28:58 +01:00
sysfs-bus-intel_th-devices-msc intel_th: Add Memory Storage Unit driver 2015-10-04 20:28:58 +01:00
sysfs-bus-intel_th-devices-pti intel_th: Add PTI output driver 2015-10-04 20:28:58 +01:00
sysfs-bus-intel_th-output-devices intel_th: Add driver infrastructure for Intel(R) Trace Hub devices 2015-10-04 20:28:58 +01:00
sysfs-bus-mcb mcb: export bus information via sysfs 2016-05-03 15:07:35 -07:00
sysfs-bus-mdio net: phy: expose phydev->has_fixups to sysfs 2014-02-12 19:08:49 -05:00
sysfs-bus-media
sysfs-bus-mei mei: bus: export client protocol version 2015-09-20 19:30:10 -07:00
sysfs-bus-pci PCI: Create revision file in sysfs 2016-11-21 16:25:32 -06:00
sysfs-bus-pci-devices-cciss
sysfs-bus-pci-drivers-ehci_hcd
sysfs-bus-pci-drivers-janz-cmodio can: janz-ican3: add documentation for existing sysfs entries 2015-05-06 08:03:19 +02:00
sysfs-bus-platform driver core: platform: add device binding path 'driver_override' 2014-07-08 15:31:26 -07:00
sysfs-bus-rbd rbd: add force close option 2016-08-24 23:49:17 +02:00
sysfs-bus-rpmsg
sysfs-bus-umc
sysfs-bus-usb usb: core: lpm: add sysfs node for usb3 lpm permit 2015-12-01 14:58:18 -08:00
sysfs-bus-usb-devices-usbsevseg Documentation: Add newline at end-of-file to files lacking one 2012-07-20 23:10:28 +02:00
sysfs-bus-usb-lvstest Pratyush Anand has moved 2015-06-25 17:00:38 -07:00
sysfs-bus-vfio-mdev docs: Sysfs ABI for mediated device framework 2016-11-17 09:18:43 -07:00
sysfs-c2port
sysfs-cfq-target-latency
sysfs-class
sysfs-class-backlight-driver-adp8870 Documentation: Add newline at end-of-file to files lacking one 2012-07-20 23:10:28 +02:00
sysfs-class-backlight-driver-lm3533
sysfs-class-bdi bdi: allow block devices to say that they require stable page writes 2013-02-21 17:22:19 -08:00
sysfs-class-cxl cxl: Prevent adapter reset if an active context exists 2016-10-19 20:35:39 +11:00
sysfs-class-devfreq PM / devfreq: add comments and Documentation 2013-06-03 20:20:29 +09:00
sysfs-class-devfreq-event PM / devfreq: Simplify the sysfs name of devfreq-event device 2017-01-31 16:57:05 +09:00
sysfs-class-extcon extcon: fix typos in sys-class-extcon 2012-09-05 12:18:11 -07:00
sysfs-class-fpga-bridge add sysfs document for fpga bridge class 2016-11-10 17:03:35 +01:00
sysfs-class-fpga-manager fpga manager: add sysfs interface document 2015-10-07 18:07:20 +01:00
sysfs-class-infiniband IB/core: Add gid attributes to sysfs 2015-12-23 10:35:11 -05:00
sysfs-class-iommu iommu: Add sysfs support for IOMMUs 2014-07-04 12:35:59 +02:00
sysfs-class-iommu-amd-iommu iommu/amd: Add sysfs support 2014-07-04 12:35:59 +02:00
sysfs-class-iommu-intel-iommu iommu/vt-d: Make use of IOMMU sysfs support 2014-07-04 12:35:59 +02:00
sysfs-class-lcd
sysfs-class-led leds: class: Add new optional brightness_hw_changed attribute 2017-01-29 19:59:42 +01:00
sysfs-class-led-driver-lm3533
sysfs-class-led-flash leds: flash: document sysfs interface 2015-03-09 17:16:28 -07:00
sysfs-class-led-trigger-oneshot Documentation: move oneshot trigger attributes documentation to ABI 2016-08-29 15:06:32 +02:00
sysfs-class-led-trigger-usbport usb: core: Introduce a USB port LED trigger 2016-09-27 12:20:17 +02:00
sysfs-class-leds-gt683r HID: gt683r: move mode attribute to led-class devices 2014-07-03 11:14:11 -07:00
sysfs-class-mei mei: show the HBM protocol versions in the device attributes 2016-10-31 04:00:09 -06:00
sysfs-class-mic.txt Documentation: mic: fix kernel version 2016-08-30 14:45:50 +02:00
sysfs-class-mtd mtd: part: Add sysfs variable for offset of partition 2015-04-05 17:44:02 -07:00
sysfs-class-net bridge: change BR_GROUPFWD_RESTRICTED to allow forwarding of LLDP frames 2015-05-05 19:20:28 -04:00
sysfs-class-net-batman-adv batman-adv: update elp interval documentation 2016-06-30 10:29:43 +02:00
sysfs-class-net-cdc_ncm net: cdc_ncm: add "ndp_to_end" sysfs attribute 2015-12-06 22:52:18 -05:00
sysfs-class-net-grcan can: grcan: Add device driver for GRCAN and GRHCAN cores 2012-11-15 20:47:26 +01:00
sysfs-class-net-janz-ican3 can: janz-ican3: add support for CAL/CANopen firmware 2015-05-06 08:03:20 +02:00
sysfs-class-net-mesh Doc: update email address 2015-12-16 00:21:40 +08:00
sysfs-class-net-qmi net: qmi_wwan: document the qmi/raw_ip sysfs file 2015-12-04 16:56:23 -05:00
sysfs-class-net-queues net: Add max rate tx queue attribute 2015-03-18 14:55:18 -04:00
sysfs-class-net-statistics net: sysfs: document /sys/class/net/statistics/* 2014-05-26 01:02:20 -04:00
sysfs-class-pktcdvd
sysfs-class-power power: supply: Change Krzysztof Kozlowski's email to kernel.org 2016-08-17 14:15:58 +02:00
sysfs-class-power-twl4030 twl4030_charger: add ac/mode to match usb/mode 2015-08-05 05:21:57 +02:00
sysfs-class-powercap PowerCap: Documentation 2013-10-17 00:36:06 +02:00
sysfs-class-pwm pwm: sysfs: Add PWM capture support 2016-06-10 16:01:40 +02:00
sysfs-class-rc [media] rc: change wakeup_protocols to list all protocol variants 2017-01-30 12:15:12 -02:00
sysfs-class-rc-nuvoton [media] media: rc: nuvoton: switch attribute wakeup_data to text 2016-03-05 08:22:03 -03:00
sysfs-class-regulator regulator: core: Support bypass mode 2012-09-10 11:25:10 +08:00
sysfs-class-remoteproc remoteproc: Add a sysfs interface for firmware and state 2016-10-31 17:24:46 -07:00
sysfs-class-rtc-rtc0-device-rtc_calibration ABI: rtc-ab8500: fix rtc_calibration documentation 2016-10-30 21:05:47 +01:00
sysfs-class-scsi_host [SCSI] hpsa: allow user to disable accelerated i/o path 2014-03-15 10:19:07 -07:00
sysfs-class-scsi_tape st: implement tape statistics 2015-06-02 08:03:25 -07:00
sysfs-class-stm stm class: Support devices that override software assigned masters 2016-05-03 14:59:30 -07:00
sysfs-class-stm_source stm class: Introduce an abstraction for System Trace Module devices 2015-10-04 20:28:58 +01:00
sysfs-class-uwb_rc uwb: doc: add documentation for ASIE sysfs attribute 2014-09-23 22:05:26 -07:00
sysfs-class-uwb_rc-wusbhc wusbcore: add entries in Documentation/ABI for new wusbhc sysfs attributes 2013-06-24 16:19:03 -07:00
sysfs-class-watchdog watchdog: Read device status through sysfs attributes 2015-12-27 16:55:57 +01:00
sysfs-class-zram zram: add dynamic device add/remove functionality 2015-06-25 17:00:36 -07:00
sysfs-dev
sysfs-devices
sysfs-devices-edac EDAC: Expose per-DIMM error counts in sysfs 2017-01-19 10:29:40 +01:00
sysfs-devices-firmware_node ACPI: Add new sysfs interface to export device description 2012-10-06 15:52:16 -04:00
sysfs-devices-lpss_ltr ACPI / LPSS: Add support for exposing LTR registers to user space 2013-03-21 22:45:15 +01:00
sysfs-devices-memory memory-hotplug: add sysfs valid_zones attribute 2014-10-09 22:25:52 -04:00
sysfs-devices-mmc
sysfs-devices-online Driver core: Add offline/online device operations 2013-05-12 14:14:09 +02:00
sysfs-devices-platform-_UDC_-gadget
sysfs-devices-platform-docg3
sysfs-devices-platform-sh_mobile_lcdc_fb
sysfs-devices-power PM / wakeup: Correct presence vs. emptiness of wakeup_* attributes 2014-04-07 14:18:24 +02:00
sysfs-devices-power_resources_D0 ACPI / PM: Expose lists of device power resources to user space 2013-01-25 21:51:32 +01:00
sysfs-devices-power_resources_D1 ACPI / PM: Expose lists of device power resources to user space 2013-01-25 21:51:32 +01:00
sysfs-devices-power_resources_D2 ACPI / PM: Expose lists of device power resources to user space 2013-01-25 21:51:32 +01:00
sysfs-devices-power_resources_D3hot ACPI / PM: Expose lists of device power resources to user space 2013-01-25 21:51:32 +01:00
sysfs-devices-power_resources_wakeup ACPI / PM: Expose lists of device wakeup power resources to user space 2013-04-11 22:41:48 +02:00
sysfs-devices-power_state ACPI / PM: Expose power states of ACPI devices to user space 2013-01-24 12:49:59 +01:00
sysfs-devices-real_power_state ACPI / PM: Expose power states of ACPI devices to user space 2013-01-24 12:49:59 +01:00
sysfs-devices-resource_in_use ACPI / PM: Expose current status of ACPI power resources 2013-01-24 12:50:09 +01:00
sysfs-devices-soc
sysfs-devices-sun ACPI: Add sysfs ABI documentation 2013-06-21 00:13:15 +02:00
sysfs-devices-system-cpu Documentation, ABI: Document the new sysfs files for cpu cache ids 2016-10-26 23:12:37 +02:00
sysfs-devices-system-ibm-rtl Documentation/ABI: ibm_rtl: The "What:" fields are incomplete 2016-11-01 09:27:33 -07:00
sysfs-devices-system-xen_cpu xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
sysfs-driver-genwqe GenWQE: Add sysfs interface for bitstream reload 2014-07-09 14:14:27 -07:00
sysfs-driver-hid HID: expose country code in sysfs 2015-02-23 16:17:32 +01:00
sysfs-driver-hid-corsair HID: corsair: Add Corsair Vengeance K90 driver 2015-09-30 21:28:10 +02:00
sysfs-driver-hid-lenovo HID: lenovo: Add support for Compact (BT|USB) keyboard 2014-07-29 11:24:47 +02:00
sysfs-driver-hid-logitech-lg4ff HID: hid-logitech: Documentation updates/corrections 2016-09-26 15:39:56 +02:00
sysfs-driver-hid-multitouch
sysfs-driver-hid-picolcd Documentation: fix common spelling mistakes 2016-04-28 07:51:59 -06:00
sysfs-driver-hid-prodikeys
sysfs-driver-hid-roccat-kone
sysfs-driver-hid-srws1 USB: HID: Steelseries SRW-S1 Add support controlling all LEDs simultaneously 2013-01-31 16:39:32 +01:00
sysfs-driver-hid-wiimote HID: wiimote: add pro-controller analog stick calibration 2013-10-30 14:13:29 +01:00
sysfs-driver-input-axp-pek Input: add driver for AXP20x Power Enable Key 2015-01-08 13:53:51 -08:00
sysfs-driver-intel-rapid-start Add support driver for Intel Rapid Start Technology 2013-07-10 15:42:48 -04:00
sysfs-driver-pciback xen-pciback: Document the 'quirks' sysfs file 2014-08-01 16:02:34 +01:00
sysfs-driver-ppi tpm: update PPI documentation to address the location change. 2015-10-19 01:01:20 +02:00
sysfs-driver-samsung-laptop samsung-laptop: enable better lid handling 2015-02-06 18:33:55 -08:00
sysfs-driver-st st: allow debug output to be enabled or disabled via sysfs 2015-11-09 17:17:27 -08:00
sysfs-driver-tegra-fuse soc/tegra: Add efuse driver for Tegra 2014-07-17 14:36:01 +02:00
sysfs-driver-toshiba_acpi Documentation/ABI: Update sysfs-driver-toshiba_acpi file 2016-03-23 10:05:37 -07:00
sysfs-driver-toshiba_haps Documentation/ABI: Add file describing the sysfs entries for toshiba_haps 2015-05-11 10:38:23 -07:00
sysfs-driver-wacom HID: wacom: leds: use the ledclass instead of custom made sysfs files 2016-08-05 13:39:19 +02:00
sysfs-driver-xen-blkback xen-blkback/sysfs: Move the parameters for the persistent grant features 2013-06-04 15:58:43 -04:00
sysfs-driver-xen-blkfront xen-blkfront: Introduce a 'max' module parameter to alter the amount of indirect segments. 2013-06-04 15:58:35 -04:00
sysfs-firmware-acpi Documentation: fix common spelling mistakes 2016-04-28 07:51:59 -06:00
sysfs-firmware-dmi-entries Documentation: ABI: sysfs-firmware-dmi: add -entries suffix to file name 2015-06-25 09:06:57 +02:00
sysfs-firmware-dmi-tables firmware: dmi_scan: add SBMIOS entry and DMI tables 2015-06-25 09:06:56 +02:00
sysfs-firmware-efi efi: Add 'systab' information to Documentation/ABI 2015-05-27 15:40:20 +01:00
sysfs-firmware-efi-esrt efi: Add esrt support 2015-04-30 22:15:04 +01:00
sysfs-firmware-efi-runtime-map efi: Export EFI runtime memory mapping to sysfs 2013-12-21 15:29:36 +00:00
sysfs-firmware-gsmi
sysfs-firmware-log
sysfs-firmware-memmap
sysfs-firmware-ofw of: Make device nodes kobjects so they show up in sysfs 2014-03-11 20:48:26 +00:00
sysfs-firmware-qemu_fw_cfg firmware: create directory hierarchy for sysfs fw_cfg entries 2016-02-09 17:37:39 -08:00
sysfs-firmware-sfi
sysfs-firmware-sgi_uv
sysfs-fs-ext4 ext4: make the zero-out chunk size tunable 2012-08-17 09:54:17 -04:00
sysfs-fs-f2fs f2fs: introduce lifetime write IO statistics 2016-02-22 16:07:23 -08:00
sysfs-fs-nilfs2 nilfs2: add /sys/fs/nilfs2/<device>/mounted_snapshots/<snapshot> group 2014-08-08 15:57:21 -07:00
sysfs-fs-xfs xfs: document log sysfs attributes in testing ABI 2014-07-15 08:09:06 +10:00
sysfs-hypervisor-pmu xen/PMU: Sysfs interface for setting Xen PMU mode 2015-08-20 12:24:26 +01:00
sysfs-ibft ibft: Expose iBFT acpi header via sysfs 2016-05-16 11:14:29 -04:00
sysfs-kernel-boot_params x86: Export x86 boot_params to sysfs 2013-12-29 13:09:07 +00:00
sysfs-kernel-fscaps
sysfs-kernel-iommu_groups iommu: Implement reserved_regions iommu-group sysfs file 2017-01-23 11:48:16 +00:00
sysfs-kernel-irq genirq: Expose interrupt information through sysfs 2016-09-14 15:28:15 +02:00
sysfs-kernel-livepatch livepatch: change to a per-task consistency model 2017-03-08 09:36:21 +01:00
sysfs-kernel-mm
sysfs-kernel-mm-hugepages
sysfs-kernel-mm-ksm ksm: add sysfs ABI Documentation 2013-02-23 17:50:19 -08:00
sysfs-kernel-slab docs: fix locations of several documents that got moved 2016-10-24 08:12:35 -02:00
sysfs-kernel-uids
sysfs-kernel-vmcoreinfo kdump: add /sys/kernel/vmcoreinfo ABI documentation 2014-01-23 16:37:03 -08:00
sysfs-memory-page-offline
sysfs-module Use 'E' instead of 'X' for unsigned module taint flag. 2014-03-31 14:52:43 +10:30
sysfs-ocfs2
sysfs-platform-asus-laptop
sysfs-platform-asus-wmi asus-wmi: enable resume on lid open 2012-07-28 00:11:49 -04:00
sysfs-platform-at91
sysfs-platform-brcmstb-gisb-arb Documentation: sysfs: add Broadcom GISB arbiter sysfs properties 2014-05-24 00:58:44 +02:00
sysfs-platform-chipidea-usb-otg Documentation: ABI: usb: sysfs Description for chipidea USB OTG HNP and SRP 2014-04-24 12:56:35 -07:00
sysfs-platform-dell-laptop platform: x86: dell-laptop: Add support for keyboard backlight 2015-04-07 20:57:32 -07:00
sysfs-platform-eeepc-laptop
sysfs-platform-hidma dmaengine: qcom_hidma: Wrong domain name in the email address 2017-01-02 10:42:33 +05:30
sysfs-platform-hidma-mgmt dmaengine: qcom_hidma: Wrong domain name in the email address 2017-01-02 10:42:33 +05:30
sysfs-platform-i2c-demux-pinctrl i2c: mux: demux-pinctrl: Update docs to new sysfs-attributes 2016-04-07 21:13:02 +02:00
sysfs-platform-ideapad-laptop ideapad: add Lenovo IdeaPad Z570 support (part 3) 2012-08-20 12:44:41 -04:00
sysfs-platform-kim
sysfs-platform-msi-laptop msi-laptop: Add missing ABI documentation 2013-02-24 14:49:53 -08:00
sysfs-platform-phy-rcar-gen3-usb2 phy: rcar-gen3-usb2: add sysfs for usb role swap 2016-11-18 18:19:15 +05:30
sysfs-platform-sst-atom ASoC: Intel: Add ASoC Intel SST Atom sysfs description 2016-12-05 17:22:27 +00:00
sysfs-platform-tahvo-usb usb: omap1: Tahvo USB transceiver driver 2013-12-06 14:46:32 -06:00
sysfs-platform-ts5500 x86/platform/ts5500: Add a 'name' sysfs attribute 2014-07-16 21:17:41 +02:00
sysfs-platform-twl4030-usb phy: twl4030-usb: add ABI documentation 2015-06-01 16:08:24 +05:30
sysfs-platform-usbip-vudc Documentation: ABI: Add doc for usbip-vudc attributes 2016-04-28 12:28:08 -07:00
sysfs-power PM / sleep: System sleep state selection interface rework 2016-11-21 22:45:40 +01:00
sysfs-pps
sysfs-profiling doc: Update the name of profiling based on sysfs 2012-12-03 11:11:51 +01:00
sysfs-ptp Documentation: fix sysfs-ptp 2015-12-08 14:50:12 +01:00
sysfs-tty serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers 2014-07-17 18:23:35 -07:00
sysfs-wusb_cbaf