kasan
ubsan
kmemleak
+ kcsan
gdb-kernel-debugging
kgdb
kselftest
+ kunit/index
.. only:: subproject and html
-
-
- List of maintainers and how to submit kernel changes
+ List of maintainers and how to submit kernel changes
+ ====================================================
Please try to follow the guidelines below. This will make things
easier on the maintainers. Not all of these guidelines matter for every
trivial patch so apply some common sense.
- 1. Always _test_ your changes, however small, on at least 4 or
+ Tips for patch submitters
+ -------------------------
+
+ 1. Always *test* your changes, however small, on at least 4 or
5 people, preferably many more.
2. Try to release a few ALPHA test versions to the net. Announce
testing and await feedback.
5. Make a patch available to the relevant maintainer in the list. Use
- 'diff -u' to make the patch easy to merge. Be prepared to get your
+ ``diff -u`` to make the patch easy to merge. Be prepared to get your
changes sent back with seemingly silly requests about formatting
and variable names. These aren't as silly as they seem. One
job the maintainers (and especially Linus) do is to keep things
See Documentation/process/coding-style.rst for guidance here.
PLEASE CC: the maintainers and mailing lists that are generated
- by scripts/get_maintainer.pl. The results returned by the
+ by ``scripts/get_maintainer.pl.`` The results returned by the
script will be best if you have git installed and are making
your changes in a branch derived from Linus' latest git tree.
See Documentation/process/submitting-patches.rst for details.
not represent an immediate threat and are better handled publicly,
and ideally, should come with a patch proposal. Please do not send
automated reports to this list either. Such bugs will be handled
- better and faster in the usual public places.
+ better and faster in the usual public places. See
+ Documentation/admin-guide/security-bugs.rst for details.
8. Happy hacking.
- Descriptions of section entries:
+ Descriptions of section entries
+ -------------------------------
- P: Person (obsolete)
- M: Mail patches to: FullName <address@domain>
- R: Designated reviewer: FullName <address@domain>
+ M: *Mail* patches to: FullName <address@domain>
+ R: Designated *Reviewer*: FullName <address@domain>
These reviewers should be CCed on patches.
- L: Mailing list that is relevant to this area
- W: Web-page with status/info
- B: URI for where to file bugs. A web-page with detailed bug
+ L: *Mailing list* that is relevant to this area
+ W: *Web-page* with status/info
+ B: URI for where to file *bugs*. A web-page with detailed bug
filing info, a direct bug tracker link, or a mailto: URI.
- C: URI for chat protocol, server and channel where developers
+ C: URI for *chat* protocol, server and channel where developers
usually hang out, for example irc://server/channel.
- Q: Patchwork web based patch tracking system site
- T: SCM tree type and location.
+ Q: *Patchwork* web based patch tracking system site
+ T: *SCM* tree type and location.
Type is one of: git, hg, quilt, stgit, topgit
- S: Status, one of the following:
+ S: *Status*, one of the following:
Supported: Someone is actually paid to look after this.
Maintained: Someone actually looks after it.
Odd Fixes: It has a maintainer but they don't have time to do
Obsolete: Old code. Something tagged obsolete generally means
it has been replaced by a better system and you
should be using that.
- F: Files and directories with wildcard patterns.
+ P: Subsystem Profile document for more details submitting
+ patches to the given subsystem. This is either an in-tree file,
+ or a URI. See Documentation/maintainer/maintainer-entry-profile.rst
+ for details.
+ F: *Files* and directories wildcard patterns.
A trailing slash includes all files and subdirectory files.
F: drivers/net/ all files in and below drivers/net
F: drivers/net/* all files in drivers/net, but not below
F: */net/* all files in "any top level directory"/net
One pattern per line. Multiple F: lines acceptable.
- N: Files and directories with regex patterns.
+ N: Files and directories *Regex* patterns.
N: [^a-z]tegra all files whose path contains the word tegra
One pattern per line. Multiple N: lines acceptable.
scripts/get_maintainer.pl has different behavior for files that
get_maintainer will not look at git log history when an F: pattern
match occurs. When an N: match occurs, git log history is used
to also notify the people that have git commit signatures.
- X: Files and directories that are NOT maintained, same rules as F:
- Files exclusions are tested before file matches.
+ X: *Excluded* files and directories that are NOT maintained, same
+ rules as F:. Files exclusions are tested before file matches.
Can be useful for excluding a specific subdirectory, for instance:
F: net/
X: net/ipv6/
matches all files in and below net excluding net/ipv6/
- K: Keyword perl extended regex pattern to match content in a
- patch or file. For instance:
+ K: *Content regex* (perl extended) pattern match in a patch or file.
+ For instance:
K: of_get_profile
matches patches or files that contain "of_get_profile"
K: \b(printk|pr_(info|err))\b
printk, pr_info or pr_err
One regex pattern per line. Multiple K: lines acceptable.
- Note: For the hard of thinking, this list is meant to remain in alphabetical
- order. If you could add yourselves to it in alphabetical order that would be
- so much easier [Ed]
+ Maintainers List
+ ----------------
- Maintainers List (try to look for most precise areas first)
-
- -----------------------------------
+ .. note:: When reading this list, please look for the most precise areas
+ first. When adding to this list, please keep the entries in
+ alphabetical order.
3C59X NETWORK DRIVER
F: drivers/net/ethernet/alteon/acenic*
ACER ASPIRE ONE TEMPERATURE AND FAN DRIVER
W: http://piie.net/?section=acerhdf
S: Maintained
FORCEDETH GIGABIT ETHERNET DRIVER
- M: Zhu Yanjun <yanjun.zhu@oracle.com>
+ M: Zhu Yanjun <zyjzyj2000@gmail.com>
S: Maintained
F: drivers/net/ethernet/nvidia/*
F: Documentation/devicetree/bindings/opp/sun50i-nvmem-cpufreq.txt
F: drivers/cpufreq/sun50i-cpufreq-nvmem.c
- ALLWINNER SECURITY SYSTEM
+ ALLWINNER CRYPTO DRIVERS
S: Maintained
- F: drivers/crypto/sunxi-ss/
+ F: drivers/crypto/allwinner/
ALLWINNER VPU DRIVER
F: drivers/usb/gadget/udc/amd5536udc.*
AMD GEODE PROCESSOR/CHIPSET SUPPORT
W: http://www.amd.com/us-en/ConnectivitySolutions/TechnicalResources/0,,50_2334_2452_11363,00.html
S: Supported
F: drivers/i2c/busses/i2c-amd-mp2*
AMD POWERPLAY
S: Supported
F: drivers/iio/adc/ad7124.c
F: Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
+ ANALOG DEVICES INC AD7292 DRIVER
+ W: http://ez.analog.com/community/linux-device-drivers
+ S: Supported
+ F: drivers/iio/adc/ad7292.c
+ F: Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
+
ANALOG DEVICES INC AD7606 DRIVER
ANALOG DEVICES INC ASOC CODEC DRIVERS
W: http://wiki.analog.com/
W: http://ez.analog.com/community/linux-device-drivers
F: include/linux/clk/analogbits*
ANDES ARCHITECTURE
T: git https://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux.git
F: drivers/media/i2c/aptina-pll.*
AQUANTIA ETHERNET DRIVER (atlantic)
- M: Igor Russkikh <igor.russkikh@aquantia.com>
+ M: Igor Russkikh <irusskikh@marvell.com>
S: Supported
- W: http://www.aquantia.com
+ W: https://www.marvell.com/
Q: http://patchwork.ozlabs.org/project/netdev/list/
F: drivers/net/ethernet/aquantia/atlantic/
F: Documentation/networking/device_drivers/aquantia/atlantic.txt
+ AQUANTIA ETHERNET DRIVER PTP SUBSYSTEM
+ S: Supported
+ W: http://www.aquantia.com
+ F: drivers/net/ethernet/aquantia/atlantic/aq_ptp*
+
ARC FRAMEBUFFER DRIVER
S: Maintained
ARM KOMEDA DRM-KMS DRIVER
S: Supported
T: git git://anongit.freedesktop.org/drm/drm-misc
ARM MALI PANFROST DRM DRIVER
S: Supported
T: git git://anongit.freedesktop.org/drm/drm-misc
F: drivers/clocksource/timer-owl*
F: drivers/dma/owl-dma.c
F: drivers/i2c/busses/i2c-owl.c
+ F: drivers/mmc/host/owl-mmc.c
F: drivers/pinctrl/actions/*
F: drivers/soc/actions/
F: include/dt-bindings/power/owl-*
F: Documentation/devicetree/bindings/clock/actions,owl-cmu.txt
F: Documentation/devicetree/bindings/dma/owl-dma.txt
F: Documentation/devicetree/bindings/i2c/i2c-owl.txt
+ F: Documentation/devicetree/bindings/mmc/owl-mmc.yaml
F: Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
F: Documentation/devicetree/bindings/power/actions,owl-sps.txt
F: Documentation/devicetree/bindings/timer/actions,owl-timer.txt
F: drivers/rtc/rtc-meson*
N: meson
+ ARM/Amlogic Meson SoC Crypto Drivers
+ S: Maintained
+ F: drivers/crypto/amlogic/
+ F: Documentation/devicetree/bindings/crypto/amlogic*
+
ARM/Amlogic Meson SoC Sound Drivers
S: Maintained
F: arch/arm64/boot/dts/bitmain/
+ F: drivers/clk/clk-bm1880.c
F: drivers/pinctrl/pinctrl-bm1880.c
F: Documentation/devicetree/bindings/arm/bitmain.yaml
+ F: Documentation/devicetree/bindings/clock/bitmain,bm1880-clk.yaml
F: Documentation/devicetree/bindings/pinctrl/bitmain,bm1880-pinctrl.txt
ARM/CALXEDA HIGHBANK ARCHITECTURE
F: arch/arm/mach-cns3xxx/
ARM/CAVIUM THUNDER NETWORK DRIVER
- M: Sunil Goutham <sgoutham@cavium.com>
- M: Robert Richter <rric@kernel.org>
+ M: Sunil Goutham <sgoutham@marvell.com>
S: Supported
F: drivers/net/ethernet/cavium/thunder/
S: Maintained
F: drivers/hwtracing/coresight/*
- F: Documentation/trace/coresight.rst
- F: Documentation/trace/coresight-cpu-debug.rst
+ F: Documentation/trace/coresight/*
F: Documentation/devicetree/bindings/arm/coresight.txt
F: Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt
F: Documentation/ABI/testing/sysfs-bus-coresight-devices-*
F: arch/arm/boot/dts/orion5x*
T: git git://git.infradead.org/linux-mvebu.git
- ARM/Marvell Kirkwood and Armada 370, 375, 38x, 39x, XP, 3700, 7K/8K SOC support
+ ARM/Marvell Kirkwood and Armada 370, 375, 38x, 39x, XP, 3700, 7K/8K, CN9130 SOC support
F: arch/arm/configs/mvebu_*_defconfig
F: arch/arm/mach-mvebu/
F: arch/arm64/boot/dts/marvell/armada*
+ F: arch/arm64/boot/dts/marvell/cn913*
F: drivers/cpufreq/armada-37xx-cpufreq.c
F: drivers/cpufreq/armada-8k-cpufreq.c
F: drivers/cpufreq/mvebu-cpufreq.c
F: drivers/hwspinlock/u8500_hsem.c
F: drivers/i2c/busses/i2c-nomadik.c
F: drivers/i2c/busses/i2c-stu300.c
+ F: drivers/iio/adc/ab8500-gpadc.c
F: drivers/mfd/ab3100*
F: drivers/mfd/ab8500*
F: drivers/mfd/abx500*
ARM/QUALCOMM SUPPORT
S: Maintained
F: Documentation/devicetree/bindings/soc/qcom/
S: Maintained
F: arch/arm/boot/dts/rda8810pl-*
F: drivers/clocksource/timer-rda.c
+ F: drivers/gpio/gpio-rda.c
F: drivers/irqchip/irq-rda-intc.c
F: drivers/tty/serial/rda-uart.c
F: Documentation/devicetree/bindings/arm/rda.yaml
+ F: Documentation/devicetree/bindings/gpio/gpio-rda.yaml
F: Documentation/devicetree/bindings/interrupt-controller/rda,8810pl-intc.txt
F: Documentation/devicetree/bindings/serial/rda,8810pl-uart.txt
F: Documentation/devicetree/bindings/timer/rda,8810pl-timer.txt
ARM/REALTEK ARCHITECTURE
S: Maintained
F: arch/arm64/boot/dts/realtek/
F: Documentation/devicetree/bindings/arm/realtek.yaml
F: drivers/*/*s5pv210*
F: drivers/memory/samsung/
F: drivers/soc/samsung/
+ F: drivers/tty/serial/samsung*
F: include/linux/soc/samsung/
F: Documentation/arm/samsung/
F: Documentation/devicetree/bindings/arm/samsung/
- F: Documentation/devicetree/bindings/sram/samsung-sram.txt
- F: Documentation/devicetree/bindings/power/pd-samsung.txt
+ F: Documentation/devicetree/bindings/power/pd-samsung.yaml
N: exynos
ARM/SAMSUNG MOBILE MACHINE SUPPORT
F: drivers/tty/serial/8250/8250_uniphier.c
N: uniphier
- ARM/Ux500 CLOCK FRAMEWORK SUPPORT
+ Ux500 CLOCK DRIVERS
- T: git git://git.linaro.org/people/ulfh/clk.git
S: Maintained
F: drivers/clk/ux500/
F: arch/arm64/
X: arch/arm64/boot/dts/
F: Documentation/arm64/
+ F: tools/testing/selftests/arm64/
AS3645A LED FLASH CONTROLLER DRIVER
T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
S: Maintained
- F: Documentation/devicetree/bindings/eeprom/at24.txt
+ F: Documentation/devicetree/bindings/eeprom/at24.yaml
F: drivers/misc/eeprom/at24.c
ATA OVER ETHERNET (AOE) DRIVER
S: Maintained
- F: Documentation/devicetree/bindings/arm/axentia.txt
F: arch/arm/boot/dts/at91-linea.dtsi
F: arch/arm/boot/dts/at91-natte.dtsi
F: arch/arm/boot/dts/at91-nattis-2-natte-2.dts
F: arch/arm/mach-bcm/
BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
S: Maintained
F: drivers/devfreq/exynos-bus.c
F: Documentation/devicetree/bindings/devfreq/exynos-bus.txt
F: Documentation/devicetree/bindings/media/cdns,*.txt
F: drivers/media/platform/cadence/cdns-csi2*
+ CADENCE NAND DRIVER
+ S: Maintained
+ F: drivers/mtd/nand/raw/cadence-nand-controller.c
+ F: Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
+
CADET FM/AM RADIO RECEIVER DRIVER
S: Maintained
F: net/sched/sch_cake.c
- CALGARY x86-64 IOMMU
- S: Maintained
- F: arch/x86/kernel/pci-calgary_64.c
- F: arch/x86/kernel/tce_64.c
- F: arch/x86/include/asm/calgary.h
- F: arch/x86/include/asm/tce.h
-
CAN NETWORK DRIVERS
S: Maintained
- F: Documentation/networking/j1939.txt
+ F: Documentation/networking/j1939.rst
F: net/can/j1939/
F: include/uapi/linux/can/j1939.h
F: drivers/net/wireless/ath/carl9170/
CAVIUM I2C DRIVER
- W: http://www.cavium.com
+ W: http://www.marvell.com
S: Supported
F: drivers/i2c/busses/i2c-octeon*
F: drivers/i2c/busses/i2c-thunderx*
- W: http://www.cavium.com
+ W: http://www.marvell.com
S: Supported
F: drivers/net/ethernet/cavium/liquidio/
CAVIUM MMC DRIVER
- W: http://www.cavium.com
+ W: http://www.marvell.com
S: Supported
F: drivers/mmc/host/cavium*
CAVIUM OCTEON-TX CRYPTO DRIVER
- M: George Cherian <george.cherian@cavium.com>
+ M: George Cherian <gcherian@marvell.com>
- W: http://www.cavium.com
+ W: http://www.marvell.com
S: Supported
F: drivers/crypto/cavium/cpt/
CAVIUM THUNDERX2 ARM64 SOC
- M: Robert Richter <rrichter@cavium.com>
+ M: Robert Richter <rrichter@marvell.com>
S: Maintained
F: arch/arm64/boot/dts/cavium/thunder2-99xx*
F: include/linux/sched/cpufreq.h
F: tools/testing/selftests/cpufreq/
- CPU FREQUENCY DRIVERS - ARM BIG LITTLE
+ CPU FREQUENCY DRIVERS - VEXPRESS SPC ARM BIG LITTLE
W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
S: Maintained
- F: drivers/cpufreq/arm_big_little.h
- F: drivers/cpufreq/arm_big_little.c
+ F: drivers/cpufreq/vexpress-spc-cpufreq.c
CPU POWER MONITORING SUBSYSTEM
S: Supported
F: drivers/scsi/cxgbi/cxgb3i
- CXGB3 IWARP RNIC DRIVER (IW_CXGB3)
- W: http://www.openfabrics.org
- S: Supported
- F: drivers/infiniband/hw/cxgb3/
- F: include/uapi/rdma/cxgb3-abi.h
-
CXGB4 CRYPTO DRIVER (chcr)
S: Maintained
F: drivers/net/fddi/defxx.*
+ DEINTERLACE DRIVERS FOR ALLWINNER H3
+ T: git git://linuxtv.org/media_tree.git
+ S: Maintained
+ F: drivers/media/platform/sunxi/sun8i-di/
+ F: Documentation/devicetree/bindings/media/allwinner,sun8i-h3-deinterlace.yaml
+
DELL SMBIOS DRIVER
DEVICE FREQUENCY (DEVFREQ)
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
S: Maintained
F: drivers/devfreq/
F: include/linux/devfreq.h
DEVICE FREQUENCY EVENT (DEVFREQ-EVENT)
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
S: Supported
F: drivers/devfreq/event/
F: drivers/devfreq/devfreq-event.c
+ F: include/dt-bindings/pmu/exynos_ppmu.h
F: include/linux/devfreq-event.h
F: Documentation/devicetree/bindings/devfreq/event/
DEVICE DIRECT ACCESS (DAX)
S: Supported
F: include/linux/reservation.h
F: include/linux/*fence.h
F: Documentation/driver-api/dma-buf.rst
+ K: dma_(buf|fence|resv)
T: git git://anongit.freedesktop.org/drm/drm-misc
DMA GENERIC OFFLOAD ENGINE SUBSYSTEM
F: include/linux/dma-mapping.h
F: include/linux/dma-noncoherent.h
+ DMC FREQUENCY DRIVER FOR SAMSUNG EXYNOS5422
+ S: Maintained
+ F: drivers/memory/samsung/exynos5422-dmc.c
+ F: Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
+
DME1737 HARDWARE MONITOR DRIVER
S: Maintained
F: drivers/net/ethernet/freescale/dpaa2/dpaa2-eth*
+ F: drivers/net/ethernet/freescale/dpaa2/dpaa2-mac*
F: drivers/net/ethernet/freescale/dpaa2/dpni*
+ F: drivers/net/ethernet/freescale/dpaa2/dpmac*
F: drivers/net/ethernet/freescale/dpaa2/dpkg.h
F: drivers/net/ethernet/freescale/dpaa2/Makefile
F: drivers/net/ethernet/freescale/dpaa2/Kconfig
+ F: Documentation/networking/device_drivers/freescale/dpaa2/ethernet-driver.rst
+ F: Documentation/networking/device_drivers/freescale/dpaa2/mac-phy-support.rst
DPAA2 ETHERNET SWITCH DRIVER
DRM DRIVERS FOR ALLWINNER A10
S: Supported
F: drivers/gpu/drm/sun4i/
F: Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
T: git git://anongit.freedesktop.org/drm/drm-misc
+ DRM DRIVER FOR ALLWINNER DE2 AND DE3 ENGINE
+ S: Supported
+ F: drivers/gpu/drm/sun4i/sun8i*
+ T: git git://anongit.freedesktop.org/drm/drm-misc
+
DRM DRIVERS FOR AMLOGIC SOCS
EDAC-CAVIUM OCTEON
- M: David Daney <david.daney@cavium.com>
+ M: Robert Richter <rrichter@marvell.com>
S: Supported
F: drivers/edac/octeon_edac*
EDAC-CAVIUM THUNDERX
S: Supported
F: drivers/edac/thunderx_edac*
S: Supported
F: drivers/edac/sifive_edac.c
+ F: drivers/soc/sifive_l2_cache.c
EDAC-SKYLAKE
EFI TEST DRIVER
- M: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+ M: Ard Biesheuvel <ardb@kernel.org>
S: Maintained
F: drivers/firmware/efi/test/
EFI VARIABLE FILESYSTEM
- M: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+ M: Ard Biesheuvel <ardb@kernel.org>
T: git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
S: Maintained
F: Documentation/ABI/testing/sysfs-class-net-phydev
F: Documentation/devicetree/bindings/net/ethernet-phy.yaml
F: Documentation/devicetree/bindings/net/mdio*
+ F: Documentation/devicetree/bindings/net/qca,ar803x.yaml
F: Documentation/networking/phy.rst
F: drivers/net/phy/
F: drivers/of/of_mdio.c
F: drivers/of/of_net.c
+ F: include/dt-bindings/net/qca-ar803x.h
F: include/linux/*mdio*.h
F: include/linux/of_net.h
F: include/linux/phy.h
EXFAT FILE SYSTEM
S: Maintained
F: drivers/staging/exfat/
F: security/integrity/evm/
EXTENSIBLE FIRMWARE INTERFACE (EFI)
- M: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+ M: Ard Biesheuvel <ardb@kernel.org>
T: git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
S: Maintained
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify
S: Maintained
F: fs/notify/
F: include/linux/fsnotify*.h
S: Supported
F: drivers/base/power/domain*.c
F: include/linux/pm_domain.h
- F: Documentation/devicetree/bindings/power/power_domain.txt
+ F: Documentation/devicetree/bindings/power/power?domain*
GENERIC RESISTIVE TOUCHSCREEN ADC DRIVER
S: Maintained
F: Documentation/firmware-guide/acpi/gpio-properties.rst
F: drivers/gpio/gpiolib-acpi.c
+ F: drivers/gpio/gpiolib-acpi.h
GPIO IR Transmitter
S: Maintained
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc.git hwspinlock-next
F: Documentation/devicetree/bindings/hwlock/
F: Documentation/hwspinlock.txt
F: drivers/hwspinlock/
F: net/802/hippi.c
F: drivers/net/hippi/
+ HISILICON SECURITY ENGINE V2 DRIVER (SEC2)
+ S: Maintained
+ F: drivers/crypto/hisilicon/sec2/sec_crypto.c
+ F: drivers/crypto/hisilicon/sec2/sec_main.c
+ F: drivers/crypto/hisilicon/sec2/sec_crypto.h
+ F: drivers/crypto/hisilicon/sec2/sec.h
+ F: Documentation/ABI/testing/debugfs-hisi-sec
+
+ HISILICON HIGH PERFORMANCE RSA ENGINE DRIVER (HPRE)
+ S: Maintained
+ F: drivers/crypto/hisilicon/hpre/hpre_crypto.c
+ F: drivers/crypto/hisilicon/hpre/hpre_main.c
+ F: drivers/crypto/hisilicon/hpre/hpre.h
+ F: Documentation/ABI/testing/debugfs-hisi-hpre
+
HISILICON NETWORK SUBSYSTEM 3 DRIVER (HNS3)
S: Maintained
F: drivers/net/ethernet/hisilicon/hns3/
+ HISILICON TRUE RANDOM NUMBER GENERATOR V2 SUPPORT
+ S: Maintained
+ F: drivers/char/hw_random/hisi-trng-v2.c
+
HISILICON LPC BUS DRIVER
W: http://www.hisilicon.com
F: drivers/crypto/hisilicon/qm.c
F: drivers/crypto/hisilicon/qm.h
F: drivers/crypto/hisilicon/sgl.c
- F: drivers/crypto/hisilicon/sgl.h
F: drivers/crypto/hisilicon/zip/
F: Documentation/ABI/testing/debugfs-hisi-zip
HP100: Driver for HP 10/100 Mbit/s Voice Grade Network Adapter Series
- S: Maintained
- F: drivers/net/ethernet/hp/hp100.*
+ S: Obsolete
+ F: drivers/staging/hp/hp100.*
HPET: High Precision Event Timers driver
S: Maintained
F: arch/x86/kernel/cpu/hygon.c
+ HYNIX HI556 SENSOR DRIVER
+ T: git git://linuxtv.org/media_tree.git
+ S: Maintained
+ F: drivers/media/i2c/hi556.c
+
Hyper-V CORE AND DRIVERS
F: include/asm-generic/mshyperv.h
F: tools/hv/
F: Documentation/ABI/stable/sysfs-bus-vmbus
+ F: Documentation/ABI/testing/debugfs-hyperv
HYPERBUS SUPPORT
I3C SUBSYSTEM
C: irc://chat.freenode.net/linux-i3c
T: git git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux.git
S: Maintained
F: Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.txt
F: drivers/i3c/master/dw*
+ I3C DRIVER FOR CADENCE I3C MASTER IP
+ S: Maintained
+ F: Documentation/devicetree/bindings/i3c/cdns,i3c-master.txt
+ F: drivers/i3c/master/i3c-master-cdns.c
+
IA64 (Itanium) PLATFORM
F: drivers/video/fbdev/intelfb/
INTEL GPIO DRIVERS
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
F: drivers/staging/media/ipu3/
F: Documentation/media/uapi/v4l/pixfmt-meta-intel-ipu3.rst
F: Documentation/media/v4l-drivers/ipu3.rst
+ F: Documentation/media/v4l-drivers/ipu3_rcb.svg
INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
F: arch/x86/include/asm/intel_punit_ipc.h
INTEL PMIC GPIO DRIVERS
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel.git
F: drivers/gpio/gpio-*cove.c
IO_URING
T: git git://git.kernel.dk/linux-block
T: git git://git.kernel.dk/liburing
S: Maintained
F: fs/io_uring.c
+ F: fs/io-wq.c
+ F: fs/io-wq.h
F: include/uapi/linux/io_uring.h
IPMI SUBSYSTEM
W: www.open-iscsi.com
S: Maintained
F: drivers/scsi/*iscsi*
F: scripts/Makefile.kasan
KCONFIG
T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git kconfig
S: Maintained
F: scripts/kconfig/
F: scripts/Kconfig.include
+KCSAN
+S: Maintained
+F: Documentation/dev-tools/kcsan.rst
+F: include/linux/kcsan*.h
+F: kernel/kcsan/
+F: lib/Kconfig.kcsan
+F: scripts/Makefile.kcsan
+
KDUMP
F: fs/autofs/
KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
F: tools/testing/selftests/
F: Documentation/dev-tools/kselftest*
+ KERNEL UNIT TESTING FRAMEWORK (KUnit)
+ W: https://google.github.io/kunit-docs/third_party/kernel/docs/
+ S: Maintained
+ F: Documentation/dev-tools/kunit/
+ F: include/kunit/
+ F: lib/kunit/
+ F: tools/testing/kunit/
+
KERNEL USERMODE HELPER
KERNEL VIRTUAL MACHINE (KVM)
W: http://www.linux-kvm.org
T: git git://git.kernel.org/pub/scm/virt/kvm/kvm.git
F: include/kvm/arm_*
KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)
- S: Supported
+ S: Orphan
F: arch/mips/include/uapi/asm/kvm*
F: arch/mips/include/asm/kvm*
F: arch/mips/kvm/
KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)
+ P: Documentation/nvdimm/maintainer-entry-profile.rst
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
S: Supported
F: drivers/nvdimm/blk.c
+ P: Documentation/nvdimm/maintainer-entry-profile.rst
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
S: Supported
F: drivers/nvdimm/btt*
+ P: Documentation/nvdimm/maintainer-entry-profile.rst
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
S: Supported
F: drivers/nvdimm/pmem*
+ P: Documentation/nvdimm/maintainer-entry-profile.rst
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git
S: Supported
F: drivers/misc/lis3lv02d/
F: drivers/platform/x86/hp_accel.c
+ LIST KUNIT TEST
+ S: Maintained
+ F: lib/list-test.c
+
LIVE PATCHING
F: Documentation/admin-guide/ldm.rst
F: block/partitions/ldm.*
+ LOGITECH HID GAMING KEYBOARDS
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git
+ S: Maintained
+ F: drivers/hid/hid-lg-g15.c
+
LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
S: Maintained
- F: Documentation/devicetree/bindings/iio/dac/ltc1660.txt
+ F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
F: drivers/iio/dac/ltc1660.c
+ LTC2983 IIO TEMPERATURE DRIVER
+ W: http://ez.analog.com/community/linux-device-drivers
+ S: Supported
+ F: drivers/iio/temperature/ltc2983.c
+ F: Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+
LTC4261 HARDWARE MONITOR DRIVER
F: Documentation/hwmon/ltc4261.rst
F: drivers/hwmon/ltc4261.c
+ LTC2947 HARDWARE MONITOR DRIVER
+ W: http://ez.analog.com/community/linux-device-drivers
+ S: Supported
+ F: drivers/hwmon/ltc2947-core.c
+ F: drivers/hwmon/ltc2947-spi.c
+ F: drivers/hwmon/ltc2947-i2c.c
+ F: drivers/hwmon/ltc2947.h
+ F: Documentation/devicetree/bindings/hwmon/adi,ltc2947.yaml
+
LTC4306 I2C MULTIPLEXER DRIVER
W: http://ez.analog.com/community/linux-device-drivers
F: drivers/net/dsa/mv88e6xxx/
F: include/linux/platform_data/mv88e6xxx.h
F: Documentation/devicetree/bindings/net/dsa/marvell.txt
+ F: Documentation/networking/devlink-params-mv88e6xxx.txt
MARVELL ARMADA DRM SUPPORT
F: drivers/hwmon/max16065.c
MAX2175 SDR TUNER DRIVER
+ M: Ramesh Shanmugasundaram <rashanmu@gmail.com>
T: git git://linuxtv.org/media_tree.git
S: Maintained
S: Maintained
- F: Documentation/devicetree/bindings/*/*max77650.txt
- F: Documentation/devicetree/bindings/*/max77650*.txt
+ F: Documentation/devicetree/bindings/*/*max77650.yaml
+ F: Documentation/devicetree/bindings/*/max77650*.yaml
F: include/linux/mfd/max77650.h
F: drivers/mfd/max77650.c
F: drivers/regulator/max77650-regulator.c
S: Maintained
F: drivers/media/radio/radio-maxiradio*
+ MCAN MMIO DEVICE DRIVER
+ S: Maintained
+ F: Documentation/devicetree/bindings/net/can/m_can.txt
+ F: drivers/net/can/m_can/m_can.c
+ F: drivers/net/can/m_can/m_can.h
+ F: drivers/net/can/m_can/m_can_platform.c
+
MCP4018 AND MCP4531 MICROCHIP DIGITAL POTENTIOMETER DRIVERS
F: include/media/drv-intf/renesas-ceu.h
MEDIA DRIVERS FOR RENESAS - DRIF
+ M: Ramesh Shanmugasundaram <rashanmu@gmail.com>
T: git git://linuxtv.org/media_tree.git
MEDIA INPUT INFRASTRUCTURE (V4L/DVB)
- P: LinuxTV.org Project
W: https://linuxtv.org
Q: http://patchwork.kernel.org/project/linux-media/list/
F: drivers/net/dsa/mt7530.*
F: net/dsa/tag_mtk.c
+ MEDIATEK BOARD LEVEL SHUTDOWN DRIVERS
+ S: Maintained
+ F: Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
+ F: drivers/power/reset/mt6323-poweroff.c
+
MEDIATEK JPEG DRIVER
S: Supported
+ F: Documentation/ABI/testing/sysfs-platform-mellanox-bootctl
F: drivers/platform/mellanox/
F: include/linux/platform_data/mlxreg.h
F: mm/
MEMORY TECHNOLOGY DEVICES (MTD)
W: http://www.linux-mtd.infradead.org/
Q: http://patchwork.ozlabs.org/project/linux-mtd/list/
+ C: irc://irc.oftc.net/mtd
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/fixes
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next
S: Maintained
S: Supported
F: drivers/media/platform/meson/ao-cec.c
F: drivers/media/platform/meson/ao-cec-g12a.c
- F: Documentation/devicetree/bindings/media/meson-ao-cec.txt
+ F: Documentation/devicetree/bindings/media/amlogic,meson-gx-ao-cec.yaml
T: git git://linuxtv.org/media_tree.git
MESON NAND CONTROLLER DRIVER FOR AMLOGIC SOCS
S: Supported
F: drivers/iio/adc/mcp3911.c
- F: Documentation/devicetree/bindings/iio/adc/mcp3911.txt
+ F: Documentation/devicetree/bindings/iio/adc/microchip,mcp3911.yaml
MICROCHIP NAND DRIVER
S: Supported
F: drivers/net/ethernet/mscc/
+ F: include/soc/mscc/ocelot*
MICROSOFT SURFACE PRO 3 BUTTON DRIVER
F: drivers/*/*loongson1*
F: drivers/*/*/*loongson1*
- MIPS/LOONGSON2 ARCHITECTURE
+ MIPS/LOONGSON2EF ARCHITECTURE
S: Maintained
- F: arch/mips/loongson64/fuloong-2e/
- F: arch/mips/loongson64/lemote-2f/
- F: arch/mips/include/asm/mach-loongson64/
+ F: arch/mips/loongson2ef/
+ F: arch/mips/include/asm/mach-loongson2ef/
F: drivers/*/*loongson2*
F: drivers/*/*/*loongson2*
- MIPS/LOONGSON3 ARCHITECTURE
+ MIPS/LOONGSON64 ARCHITECTURE
S: Maintained
F: arch/mips/loongson64/
MMP SUPPORT
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux-mmp.git
S: Odd Fixes
F: arch/arm/boot/dts/mmp*
F: arch/arm/mach-mmp/
+ F: linux/soc/mmp/
+
+ MMP USB PHY DRIVERS
+ S: Maintained
+ F: drivers/phy/marvell/phy-mmp3-usb.c
+ F: drivers/phy/marvell/phy-pxa-usb.c
MMU GATHER AND TLB INVALIDATION
NVM EXPRESS TARGET DRIVER
T: git://git.infradead.org/nvme.git
W: http://git.infradead.org/nvme.git
F: arch/arm/boot/dts/*am4*
F: arch/arm/boot/dts/*am5*
F: arch/arm/boot/dts/*dra7*
+ F: arch/arm/boot/dts/logicpd-som-lv*
+ F: arch/arm/boot/dts/logicpd-torpedo*
OMAP DISPLAY SUBSYSTEM and FRAMEBUFFER SUPPORT (DSS2)
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git
S: Supported
F: fs/overlayfs/
- F: Documentation/filesystems/overlayfs.txt
+ F: Documentation/filesystems/overlayfs.rst
P54 WIRELESS DRIVER
F: drivers/pci/controller/dwc/*imx6*
PCI DRIVER FOR INTEL VOLUME MANAGEMENT DEVICE (VMD)
S: Supported
F: drivers/pci/controller/pci-tegra.c
PCI DRIVER FOR RENESAS R-CAR
S: Maintained
F: drivers/pci/controller/dwc/*artpec*
PCIE DRIVER FOR CAVIUM THUNDERX
- M: David Daney <david.daney@cavium.com>
+ M: Robert Richter <rrichter@marvell.com>
S: Supported
F: arch/*/events/*/*
F: tools/perf/
+ PERFORMANCE EVENTS SUBSYSTEM ARM64 PMU EVENTS
+ S: Supported
+ F: tools/perf/pmu-events/arch/arm64/
+
PERSONALITY HANDLING
T: git git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git
F: samples/pidfd/
F: tools/testing/selftests/pidfd/
+ F: tools/testing/selftests/clone3/
K: (?i)pidfd
K: (?i)clone3
K: \b(clone_args|kernel_clone_args)\b
PIN CONTROLLER - INTEL
T: git git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel.git
S: Maintained
F: drivers/pinctrl/intel/
S: Supported
F: drivers/scsi/pm8001/
+ PM-GRAPH UTILITY
+ W: https://01.org/pm-graph
+ B: https://bugzilla.kernel.org/buglist.cgi?component=pm-graph&product=Tools
+ T: git git://github.com/intel/pm-graph
+ S: Supported
+ F: tools/power/pm-graph
+
PNP SUPPORT
S: Maintained
PROC SYSCTL
S: Maintained
F: fs/proc/proc_sysctl.c
F: include/linux/sysctl.h
F: kernel/sysctl.c
+ F: kernel/sysctl-test.c
F: tools/testing/selftests/sysctl/
PS3 NETWORK SUPPORT
S: Maintained
F: drivers/iommu/qcom_iommu.c
+ QUALCOMM RMNET DRIVER
+ S: Maintained
+ F: drivers/net/ethernet/qualcomm/rmnet/
+ F: Documentation/networking/device_drivers/qualcomm/rmnet.txt
+ F: include/linux/if_rmnet.h
+
QUALCOMM TSENS THERMAL DRIVER
S: Maintained
F: drivers/thermal/qcom/
+ F: Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
QUALCOMM VENUS VIDEO ACCELERATOR DRIVER
RADOS BLOCK DEVICE (RBD)
W: http://ceph.com/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git
F: arch/mips/ralink
RALINK RT2X00 WIRELESS LAN DRIVER
- P: rt2x00 project
F: Documentation/devicetree/bindings/net/renesas,*.txt
- F: Documentation/devicetree/bindings/net/sh_eth.txt
+ F: Documentation/devicetree/bindings/net/renesas,*.yaml
F: drivers/net/ethernet/renesas/
F: include/linux/sh_eth.h
F: include/linux/reset.h
F: include/linux/reset/
F: include/linux/reset-controller.h
+ K: \b(?:devm_|of_)?reset_control(?:ler_[a-z]+|_[a-z_]+)?\b
RESTARTABLE SEQUENCES SUPPORT
F: drivers/net/ethernet/rocker/
ROCKETPORT DRIVER
- P: Comtrol Corp.
W: http://www.comtrol.com
S: Maintained
F: Documentation/driver-api/serial/rocket.rst
S: Odd Fixes
F: drivers/tty/serial/rp2.*
+ ROHM BH1750 AMBIENT LIGHT SENSOR DRIVER
+ S: Maintained
+ F: drivers/iio/light/bh1750.c
+ F: Documentation/devicetree/bindings/iio/light/bh1750.yaml
+
ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS
S: Maintained
F: drivers/crypto/exynos-rng.c
- F: Documentation/devicetree/bindings/rng/samsung,exynos4-rng.txt
+ F: Documentation/devicetree/bindings/rng/samsung,exynos4-rng.yaml
SAMSUNG EXYNOS TRUE RANDOM NUMBER GENERATOR (TRNG) DRIVER
S: Maintained
- F: Documentation/devicetree/bindings/crypto/samsung-slimsss.txt
- F: Documentation/devicetree/bindings/crypto/samsung-sss.txt
+ F: Documentation/devicetree/bindings/crypto/samsung-slimsss.yaml
+ F: Documentation/devicetree/bindings/crypto/samsung-sss.yaml
F: drivers/crypto/s5p-sss.c
SAMSUNG S5P/EXYNOS4 SOC SERIES CAMERA SUBSYSTEM DRIVERS
F: drivers/media/usb/siano/
F: drivers/media/mmc/siano/
+ SIFIVE PDMA DRIVER
+ S: Maintained
+ F: drivers/dma/sf-pdma/
+ F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+
SIFIVE DRIVERS
F: drivers/input/touchscreen/silead.c
F: drivers/platform/x86/touchscreen_dmi.c
+ SILICON LABS WIRELESS DRIVERS (for WFxxx series)
+ S: Supported
+ F: drivers/staging/wfx/
+
SILICON MOTION SM712 FRAME BUFFER DRIVER
F: include/linux/platform_data/simplefb.h
SIMTEC EB110ATX (Chalice CATS)
- P: Ben Dooks
W: http://www.simtec.co.uk/products/EB110ATX/
S: Supported
SIMTEC EB2410ITX (BAST)
- P: Ben Dooks
W: http://www.simtec.co.uk/products/EB2410ITX/
S: Supported
F: drivers/staging/media/soc_camera/
SOCIONEXT SYNQUACER I2C DRIVER
- M: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+ M: Ard Biesheuvel <ardb@kernel.org>
S: Maintained
F: drivers/i2c/busses/i2c-synquacer.c
F: drivers/media/i2c/imx274.c
F: Documentation/devicetree/bindings/media/i2c/imx274.txt
+ SONY IMX290 SENSOR DRIVER
+ T: git git://linuxtv.org/media_tree.git
+ S: Maintained
+ F: drivers/media/i2c/imx290.c
+ F: Documentation/devicetree/bindings/media/i2c/imx290.txt
+
SONY IMX319 SENSOR DRIVER
F: arch/arm/mach-spear/
SPI NOR SUBSYSTEM
W: http://www.linux-mtd.infradead.org/
S: Supported
F: drivers/staging/wilc1000/
+ STAGING - SEPS525 LCD CONTROLLER DRIVERS
+ S: Supported
+ F: drivers/staging/fbtft/fb_seps525.c
+ F: Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
+
STAGING SUBSYSTEM
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
S: Maintained
- F: Documentation/devicetree/bindings/input/sun4i-lradc-keys.txt
+ F: Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml
F: drivers/input/keyboard/sun4i-lradc-keys.c
SUNDANCE NETWORK DRIVER
F: include/linux/stm.h
F: include/uapi/linux/stm.h
+ SYSTEM76 ACPI DRIVER
+ S: Maintained
+ F: drivers/platform/x86/system76_acpi.c
+
SYSV FILESYSTEM
S: Maintained
THERMAL
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git
- T: git git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git
Q: https://patchwork.kernel.org/project/linux-pm/list/
S: Supported
F: drivers/thermal/
F: drivers/thermal/cpu_cooling.c
F: include/linux/cpu_cooling.h
+ THERMAL DRIVER FOR AMLOGIC SOCS
+ W: http://linux-meson.com/
+ S: Supported
+ F: drivers/thermal/amlogic_thermal.c
+ F: Documentation/devicetree/bindings/thermal/amlogic,thermal.yaml
+
THINKPAD ACPI EXTRAS DRIVER
F: drivers/net/thunderbolt.c
THUNDERX GPIO DRIVER
- M: David Daney <david.daney@cavium.com>
+ M: Robert Richter <rrichter@marvell.com>
S: Maintained
F: drivers/gpio/gpio-thunderx.c
F: drivers/media/platform/davinci/
F: include/media/davinci/
+ TI ENHANCED QUADRATURE ENCODER PULSE (eQEP) DRIVER
+ F: Documentation/devicetree/bindings/counter/ti-eqep.yaml
+ F: drivers/counter/ti-eqep.c
+
TI ETHERNET SWITCH DRIVER (CPSW)
S: Odd Fixes
F: sound/soc/codecs/tas571x*
+ TI TCAN4X5X DEVICE DRIVER
+ S: Maintained
+ F: Documentation/devicetree/bindings/net/can/tcan4x5x.txt
+ F: drivers/net/can/m_can/tcan4x5x.c
+
TI TRF7970A NFC DRIVER
Q: http://patchwork.linuxtv.org/project/linux-media/list/
S: Maintained
F: drivers/media/platform/ti-vpe/
+ F: Documentation/devicetree/bindings/media/ti,vpe.yaml
TI WILINK WIRELESS DRIVERS
F: Documentation/hwmon/tmp401.rst
F: drivers/hwmon/tmp401.c
+ TMP513 HARDWARE MONITOR DRIVER
+ S: Maintained
+ F: Documentation/hwmon/tmp513.rst
+ F: drivers/hwmon/tmp513.c
+
TMPFS (SHMEM FILESYSTEM)
UBI FILE SYSTEM (UBIFS)
- T: git git://git.infradead.org/ubifs-2.6.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git fixes
W: http://www.linux-mtd.infradead.org/doc/ubifs.html
S: Supported
F: Documentation/filesystems/ubifs.txt
F: drivers/scsi/ufs/ufs-mediatek*
UNSORTED BLOCK IMAGES (UBI)
W: http://www.linux-mtd.infradead.org/
- T: git git://git.infradead.org/ubifs-2.6.git
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git fixes
S: Supported
F: drivers/mtd/ubi/
F: include/linux/mtd/ubi.h
VIMC VIRTUAL MEDIA CONTROLLER DRIVER
T: git git://linuxtv.org/media_tree.git
W: https://linuxtv.org
VIRTIO AND VHOST VSOCK DRIVER
F: drivers/input/serio/userio.c
F: include/uapi/linux/userio.h
+ VITESSE FELIX ETHERNET SWITCH DRIVER
+ S: Maintained
+ F: drivers/net/dsa/ocelot/*
+ F: net/dsa/tag_ocelot.c
+
VIVID VIRTUAL VIDEO DRIVER
F: drivers/net/vrf.c
F: Documentation/networking/vrf.txt
+ VSPRINTF
+ T: git git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk.git
+ S: Maintained
+ F: lib/vsprintf.c
+ F: lib/test_printf.c
+ F: Documentation/core-api/printk-formats.rst
+
VT1211 HARDWARE MONITOR DRIVER
F: drivers/hwmon/vt8231.c
VUB300 USB to SDIO/SD/MMC bridge chip
- S: Supported
+ S: Orphan
F: drivers/mmc/host/vub300.c
W1 DALLAS'S 1-WIRE BUS
S: Maintained
F: drivers/net/ethernet/xilinx/xilinx_axienet*
+ XILINX CAN DRIVER
+ S: Maintained
+ F: Documentation/devicetree/bindings/net/can/xilinx_can.txt
+ F: drivers/net/can/xilinx_can.c
+
XILINX UARTLITE SERIAL DRIVER
F: drivers/char/xillybus/
XLP9XX I2C DRIVER
- W: http://www.cavium.com
+ W: http://www.marvell.com
S: Supported
F: Documentation/devicetree/bindings/i2c/i2c-xlp9xx.txt
F: drivers/i2c/busses/i2c-xlp9xx.c
# SPDX-License-Identifier: GPL-2.0
VERSION = 5
- PATCHLEVEL = 4
+ PATCHLEVEL = 5
SUBLEVEL = 0
- EXTRAVERSION = -rc8
+ EXTRAVERSION = -rc4
NAME = Kleptomaniac Octopus
# *DOCUMENTATION*
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
OBJSIZE = $(CROSS_COMPILE)size
+ READELF = $(CROSS_COMPILE)readelf
PAHOLE = pahole
LEX = flex
YACC = bison
CLANG_FLAGS :=
export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
- export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL
+ export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
-export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
+export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
init-y := init/
drivers-y := drivers/ sound/
drivers-$(CONFIG_SAMPLES) += samples/
- drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
net-y := net/
libs-y := lib/
core-y := usr/
include scripts/Makefile.kasan
include scripts/Makefile.extrawarn
include scripts/Makefile.ubsan
+include scripts/Makefile.kcsan
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
KBUILD_CPPFLAGS += $(KCPPFLAGS)
PHONY += prepare0
export MODORDER := $(extmod-prefix)modules.order
+ export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
$(Q)$(MAKE) $(hdr-inst)=include/uapi
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
+ # Deprecated. It is no-op now.
PHONY += headers_check
- headers_check: headers
- $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
- $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
+ headers_check:
+ @:
ifdef CONFIG_HEADERS_INSTALL
prepare: headers
endif
- ifdef CONFIG_HEADERS_CHECK
- all: headers_check
- endif
-
PHONY += scripts_unifdef
scripts_unifdef: scripts_basic
$(Q)$(MAKE) $(build)=scripts scripts/unifdef
# Directories & files removed with 'make clean'
CLEAN_DIRS += include/ksym
- CLEAN_FILES += modules.builtin.modinfo
+ CLEAN_FILES += modules.builtin.modinfo modules.nsdeps
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include/generated \
@echo ' versioncheck - Sanity check on version.h usage'
@echo ' includecheck - Check for duplicate included header files'
@echo ' export_report - List the usages of all exported symbols'
- @echo ' headers_check - Sanity check on exported headers'
@echo ' headerdep - Detect inclusion cycles in headers'
@echo ' coccicheck - Check with Coccinelle'
@echo ''
@echo ''
@$(if $(boards), \
$(foreach b, $(boards), \
- printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
+ printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
echo '')
@$(if $(board-dirs), \
$(foreach b, $(board-dirs), \
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
- @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
+ @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
+ @echo ' (sparse by default)'
@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
@echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
$(call cmd,depmod)
clean-dirs := $(KBUILD_EXTMOD)
- clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
+ clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps
PHONY += /
/:
PHONY += prepare
endif # KBUILD_EXTMOD
+ # Single targets
+ # ---------------------------------------------------------------------------
+ # To build individual files in subdirectories, you can do like this:
+ #
+ # make foo/bar/baz.s
+ #
+ # The supported suffixes for single-target are listed in 'single-targets'
+ #
+ # To build only under specific subdirectories, you can do like this:
+ #
+ # make foo/bar/baz/
+
+ ifdef single-build
+
+ # .ko is special because modpost is needed
+ single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
+ single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
+
+ $(single-ko): single_modpost
+ @:
+ $(single-no-ko): descend
+ @:
+
+ ifeq ($(KBUILD_EXTMOD),)
+ # For the single build of in-tree modules, use a temporary file to avoid
+ # the situation of modules_install installing an invalid modules.order.
+ MODORDER := .modules.tmp
+ endif
+
+ PHONY += single_modpost
+ single_modpost: $(single-no-ko)
+ $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+ KBUILD_MODULES := 1
+
+ export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
+
+ # trim unrelated directories
+ build-dirs := $(foreach d, $(build-dirs), \
+ $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
+
+ endif
+
# Handle descending into subdirectories listed in $(build-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
PHONY += descend $(build-dirs)
descend: $(build-dirs)
$(build-dirs): prepare
- $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1
+ $(Q)$(MAKE) $(build)=$@ \
+ single-build=$(if $(filter-out $@/, $(single-no-ko)),1) \
+ need-builtin=1 need-modorder=1
clean-dirs := $(addprefix _clean_, $(clean-dirs))
PHONY += $(clean-dirs) clean
-o -name '*.ko.*' \
-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
-o -name '*.dwo' -o -name '*.lst' \
- -o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \
+ -o -name '*.su' -o -name '*.mod' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.lex.c' -o -name '*.tab.[ch]' \
-o -name '*.asn1.[ch]' \
# ---------------------------------------------------------------------------
PHONY += nsdeps
-
+ nsdeps: export KBUILD_NSDEPS=1
nsdeps: modules
- $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
- # Single targets
- # ---------------------------------------------------------------------------
- # To build individual files in subdirectories, you can do like this:
- #
- # make foo/bar/baz.s
- #
- # The supported suffixes for single-target are listed in 'single-targets'
- #
- # To build only under specific subdirectories, you can do like this:
- #
- # make foo/bar/baz/
-
- ifdef single-build
-
- single-all := $(filter $(single-targets), $(MAKECMDGOALS))
-
- # .ko is special because modpost is needed
- single-ko := $(sort $(filter %.ko, $(single-all)))
- single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all)))
-
- $(single-ko): single_modpost
- @:
- $(single-no-ko): descend
- @:
-
- ifeq ($(KBUILD_EXTMOD),)
- # For the single build of in-tree modules, use a temporary file to avoid
- # the situation of modules_install installing an invalid modules.order.
- MODORDER := .modules.tmp
- endif
-
- PHONY += single_modpost
- single_modpost: $(single-no-ko)
- $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
- $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
-
- KBUILD_MODULES := 1
-
- export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
-
- single-build = $(if $(filter-out $@/, $(single-no-ko)),1)
-
- endif
-
# FIXME Should go into a make.lib or something
# ===========================================================================
depends on 64BIT
# Options that are inherently 64-bit kernel only:
select ARCH_HAS_GIGANTIC_PAGE
- select ARCH_SUPPORTS_INT128
+ select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_USE_CMPXCHG_LOCKREF
select HAVE_ARCH_SOFT_DIRTY
select MODULES_USE_ELF_RELA
select ARCH_HAS_PMEM_API if X86_64
select ARCH_HAS_PTE_DEVMAP if X86_64
select ARCH_HAS_PTE_SPECIAL
- select ARCH_HAS_REFCOUNT
select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64
select ARCH_HAS_UACCESS_MCSAFE if X86_64 && X86_MCE
select ARCH_HAS_SET_MEMORY
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN if X86_64
+ select HAVE_ARCH_KASAN_VMALLOC if X86_64
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
select HAVE_DMA_CONTIGUOUS
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
+ select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
select HAVE_EBPF_JIT
select HAVE_EFFICIENT_UNALIGNED_ACCESS
select HAVE_EISA
select VIRT_TO_BUS
select X86_FEATURE_NAMES if PROC_FS
select PROC_PID_ARCH_STATUS if PROC_FS
+ select HAVE_ARCH_KCSAN if X86_64
config INSTRUCTION_DECODER
def_bool y
config STA2X11
bool "STA2X11 Companion Chip Support"
depends on X86_32_NON_STANDARD && PCI
- select ARCH_HAS_PHYS_TO_DMA
select SWIOTLB
select MFD_STA2X11
select GPIOLIB
If unsure, say Y.
- config CALGARY_IOMMU
- bool "IBM Calgary IOMMU support"
- select IOMMU_HELPER
- select SWIOTLB
- depends on X86_64 && PCI
- ---help---
- Support for hardware IOMMUs in IBM's xSeries x366 and x460
- systems. Needed to run systems with more than 3GB of memory
- properly with 32-bit PCI devices that do not support DAC
- (Double Address Cycle). Calgary also supports bus level
- isolation, where all DMAs pass through the IOMMU. This
- prevents them from going anywhere except their intended
- destination. This catches hard-to-find kernel bugs and
- mis-behaving drivers and devices that do not use the DMA-API
- properly to set up their DMA buffers. The IOMMU can be
- turned off at boot time with the iommu=off parameter.
- Normally the kernel will make the right choice by itself.
- If unsure, say Y.
-
- config CALGARY_IOMMU_ENABLED_BY_DEFAULT
- def_bool y
- prompt "Should Calgary be enabled by default?"
- depends on CALGARY_IOMMU
- ---help---
- Should Calgary be enabled by default? if you choose 'y', Calgary
- will be used (if it exists). If you choose 'n', Calgary will not be
- used even if it exists. If you choose 'n' and would like to use
- Calgary anyway, pass 'iommu=calgary' on the kernel command line.
- If unsure, say Y.
-
config MAXSMP
bool "Enable Maximum number of SMP Processors and NUMA Nodes"
depends on X86_64 && SMP && DEBUG_KERNEL
config NR_CPUS_RANGE_END
int
depends on X86_64
- default 8192 if SMP && ( MAXSMP || CPUMASK_OFFSTACK)
- default 512 if SMP && (!MAXSMP && !CPUMASK_OFFSTACK)
+ default 8192 if SMP && CPUMASK_OFFSTACK
+ default 512 if SMP && !CPUMASK_OFFSTACK
default 1 if !SMP
config NR_CPUS_DEFAULT
Disabling this option saves about 7K of kernel size and
possibly 4K of additional runtime pagetable memory.
+ config X86_IOPL_IOPERM
+ bool "IOPERM and IOPL Emulation"
+ default y
+ ---help---
+ This enables the ioperm() and iopl() syscalls which are necessary
+ for legacy applications.
+
+ Legacy IOPL support is an overbroad mechanism which allows user
+ space aside of accessing all 65536 I/O ports also to disable
+ interrupts. To gain this access the caller needs CAP_SYS_RAWIO
+ capabilities and permission from potentially active security
+ modules.
+
+ The emulation restricts the functionality of the syscall to
+ only allowing the full range I/O port access, but prevents the
+ ability to disable interrupts from user space which would be
+ granted if the hardware IOPL mechanism would be used.
+
config TOSHIBA
tristate "Toshiba Laptop support"
depends on X86_32
config X86_5LEVEL
bool "Enable 5-level page tables support"
+ default y
select DYNAMIC_MEMORY_LAYOUT
select SPARSEMEM_VMEMMAP
depends on X86_64
config MATH_EMULATION
bool
depends on MODIFY_LDT_SYSCALL
- prompt "Math emulation" if X86_32
+ prompt "Math emulation" if X86_32 && (M486SX || MELAN)
---help---
Linux can emulate a math coprocessor (used for floating point
operations) if you don't have one. 486DX and Pentium processors have
If unsure, say Y.
- config X86_INTEL_UMIP
+ config X86_UMIP
def_bool y
- depends on CPU_SUP_INTEL
- prompt "Intel User Mode Instruction Prevention" if EXPERT
- ---help---
- The User Mode Instruction Prevention (UMIP) is a security
- feature in newer Intel processors. If enabled, a general
- protection fault is issued if the SGDT, SLDT, SIDT, SMSW
- or STR instructions are executed in user mode. These instructions
- unnecessarily expose information about the hardware state.
+ depends on CPU_SUP_INTEL || CPU_SUP_AMD
+ prompt "User Mode Instruction Prevention" if EXPERT
+ ---help---
+ User Mode Instruction Prevention (UMIP) is a security feature in
+ some x86 processors. If enabled, a general protection fault is
+ issued if the SGDT, SLDT, SIDT, SMSW or STR instructions are
+ executed in user mode. These instructions unnecessarily expose
+ information about the hardware state.
The vast majority of applications do not use these instructions.
For the very few that do, software emulation is provided in
# Changed by many, many contributors over the years.
#
+# Sanitizer runtimes are unavailable and cannot be linked for early boot code.
KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
OBJECT_FILES_NON_STANDARD := y
# Kernel does not boot with kcov instrumentation here.
KBUILD_CFLAGS := $(REALMODE_CFLAGS) -D_SETUP
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
+ KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
GCOV_PROFILE := n
UBSAN_SANITIZE := n
SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
- sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p'
+ sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p'
quiet_cmd_zoffset = ZOFFSET $@
cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
# (see scripts/Makefile.lib size_append)
# compressed vmlinux.bin.all + u32 size of vmlinux.bin.all
+# Sanitizer runtimes are unavailable and cannot be linked for early boot code.
KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
OBJECT_FILES_NON_STANDARD := y
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += -Wno-pointer-sign
+ KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
GCOV_PROFILE := n
$(obj)/misc.o: $(obj)/../voffset.h
- vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \
- $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \
+ vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \
+ $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \
$(obj)/piggy.o $(obj)/cpuflags.o
vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o
quiet_cmd_check_data_rel = DATAREL $@
define cmd_check_data_rel
for obj in $(filter %.o,$^); do \
- ${CROSS_COMPILE}readelf -S $$obj | grep -qF .rel.local && { \
+ $(READELF) -S $$obj | grep -qF .rel.local && { \
echo "error: $$obj has data relocations!" >&2; \
exit 1; \
} || true; \
include $(srctree)/lib/vdso/Makefile
KBUILD_CFLAGS += $(DISABLE_LTO)
+
+# Sanitizer runtimes are unavailable and cannot be linked here.
KASAN_SANITIZE := n
UBSAN_SANITIZE := n
+KCSAN_SANITIZE := n
OBJECT_FILES_NON_STANDARD := y
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
#
# vDSO code runs in userspace and -pg doesn't help with profiling anyway.
#
- CFLAGS_REMOVE_vdso-note.o = -pg
CFLAGS_REMOVE_vclock_gettime.o = -pg
CFLAGS_REMOVE_vdso32/vclock_gettime.o = -pg
CFLAGS_REMOVE_vgetcpu.o = -pg
- CFLAGS_REMOVE_vvar.o = -pg
#
# X32 processes use x32 vDSO to access 64bit kernel data.
return GEN_BINARY_RMWcc(LOCK_PREFIX __ASM_SIZE(btc), *addr, c, "Ir", nr);
}
-static __always_inline bool constant_test_bit(long nr, const volatile unsigned long *addr)
+static __no_kcsan_or_inline bool constant_test_bit(long nr, const volatile unsigned long *addr)
{
+ /*
+ * Because this is a plain access, we need to disable KCSAN here to
+ * avoid double instrumentation via instrumented bitops.
+ */
return ((1UL << (nr & (BITS_PER_LONG-1))) &
(addr[nr >> _BITOPS_LONG_SHIFT])) != 0;
}
#include <asm-generic/bitops/const_hweight.h>
- #include <asm-generic/bitops-instrumented.h>
+ #include <asm-generic/bitops/instrumented-atomic.h>
+ #include <asm-generic/bitops/instrumented-non-atomic.h>
+ #include <asm-generic/bitops/instrumented-lock.h>
#include <asm-generic/bitops/le.h>
KASAN_SANITIZE_stacktrace.o := n
KASAN_SANITIZE_paravirt.o := n
+# With some compiler versions the generated code results in boot hangs, caused
+# by several compilation units. To be safe, disable all instrumentation.
+KCSAN_SANITIZE := n
+
OBJECT_FILES_NON_STANDARD_relocate_kernel_$(BITS).o := y
OBJECT_FILES_NON_STANDARD_test_nx.o := y
OBJECT_FILES_NON_STANDARD_paravirt_patch.o := y
obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o
obj-y += kprobes/
obj-$(CONFIG_MODULES) += module.o
- obj-$(CONFIG_DOUBLEFAULT) += doublefault.o
+ ifeq ($(CONFIG_X86_32),y)
+ obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
+ endif
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_VM86) += vm86_32.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
obj-$(CONFIG_TRACING) += tracepoint.o
obj-$(CONFIG_SCHED_MC_PRIO) += itmt.o
- obj-$(CONFIG_X86_INTEL_UMIP) += umip.o
+ obj-$(CONFIG_X86_UMIP) += umip.o
obj-$(CONFIG_UNWINDER_ORC) += unwind_orc.o
obj-$(CONFIG_UNWINDER_FRAME_POINTER) += unwind_frame.o
obj-$(CONFIG_AUDIT) += audit_64.o
obj-$(CONFIG_GART_IOMMU) += amd_gart_64.o aperture_64.o
- obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
obj-$(CONFIG_MMCONF_FAM10H) += mmconf-fam10h_64.o
obj-y += vsmp_64.o
KASAN_SANITIZE_mem_encrypt.o := n
KASAN_SANITIZE_mem_encrypt_identity.o := n
+# Disable KCSAN entirely, because otherwise we get warnings that some functions
+# reference __initdata sections.
+KCSAN_SANITIZE := n
+
ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_mem_encrypt.o = -pg
CFLAGS_REMOVE_mem_encrypt_identity.o = -pg
endif
obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
- pat.o pgtable.o physaddr.o setup_nx.o tlb.o cpu_entry_area.o
+ pat.o pgtable.o physaddr.o setup_nx.o tlb.o cpu_entry_area.o maccess.o
# Make sure __phys_addr has no stackprotector
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_fault.o := -I $(srctree)/$(src)/../include/asm/trace
- obj-$(CONFIG_X86_PAT) += pat_rbtree.o
+ obj-$(CONFIG_X86_PAT) += pat_interval.o
obj-$(CONFIG_X86_32) += pgtable_32.o iomap_32.o
-D__DISABLE_EXPORTS
GCOV_PROFILE := n
+# Sanitizer runtimes are unavailable and cannot be linked here.
KASAN_SANITIZE := n
+KCSAN_SANITIZE := n
UBSAN_SANITIZE := n
OBJECT_FILES_NON_STANDARD := y
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
- lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o
+ lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o \
+ random.o
# include the stub's generic dependencies from lib/ when building for ARM/arm64
arm-deps-y := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c
$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
$(call if_changed_rule,cc_o_c)
- lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o random.o \
+ lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o \
$(patsubst %.c,lib-%.o,$(arm-deps-y))
lib-$(CONFIG_ARM) += arm32-stub.o
#include <linux/task_io_accounting.h>
#include <linux/posix-timers.h>
#include <linux/rseq.h>
+#include <linux/kcsan.h>
/* task_struct member predeclarations (sorted alphabetically): */
struct audit_context;
enum vtime_state {
/* Task is sleeping or running in a CPU with VTIME inactive: */
VTIME_INACTIVE = 0,
- /* Task runs in userspace in a CPU with VTIME active: */
- VTIME_USER,
+ /* Task is idle */
+ VTIME_IDLE,
/* Task runs in kernelspace in a CPU with VTIME active: */
VTIME_SYS,
+ /* Task runs in userspace in a CPU with VTIME active: */
+ VTIME_USER,
+ /* Task runs as guests in a CPU with VTIME active: */
+ VTIME_GUEST,
};
struct vtime {
seqcount_t seqcount;
unsigned long long starttime;
enum vtime_state state;
+ unsigned int cpu;
u64 utime;
u64 stime;
u64 gtime;
u64 start_time;
/* Boot based time in nsecs: */
- u64 real_start_time;
+ u64 start_boottime;
/* MM fault and swap info: this can arguably be seen as either mm-specific or thread-specific: */
unsigned long min_flt;
#endif
struct list_head pi_state_list;
struct futex_pi_state *pi_state_cache;
+ struct mutex futex_exit_mutex;
+ unsigned int futex_state;
#endif
#ifdef CONFIG_PERF_EVENTS
struct perf_event_context *perf_event_ctxp[perf_nr_task_contexts];
#ifdef CONFIG_KASAN
unsigned int kasan_depth;
#endif
+#ifdef CONFIG_KCSAN
+ struct kcsan_ctx kcsan_ctx;
+#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* Index of current stored address in ret_stack: */
#endif /* CONFIG_TRACING */
#ifdef CONFIG_KCOV
+ /* See kernel/kcov.c for more details. */
+
/* Coverage collection mode enabled for this task (0 if disabled): */
unsigned int kcov_mode;
/* KCOV descriptor wired with this task or NULL: */
struct kcov *kcov;
+
+ /* KCOV common handle for remote coverage collection: */
+ u64 kcov_handle;
+
+ /* KCOV sequence number: */
+ int kcov_sequence;
#endif
#ifdef CONFIG_MEMCG
*/
#define PF_IDLE 0x00000002 /* I am an IDLE thread */
#define PF_EXITING 0x00000004 /* Getting shut down */
- #define PF_EXITPIDONE 0x00000008 /* PI exit done on shut down */
#define PF_VCPU 0x00000010 /* I'm a virtual CPU */
#define PF_WQ_WORKER 0x00000020 /* I'm a workqueue worker */
#define PF_FORKNOEXEC 0x00000040 /* Forked but didn't exec */
#define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_mask */
#define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */
#define PF_MEMALLOC_NOCMA 0x10000000 /* All allocation request will have _GFP_MOVABLE cleared */
+ #define PF_IO_WORKER 0x20000000 /* Task is an IO worker */
#define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */
#define PF_SUSPEND_TASK 0x80000000 /* This thread called freeze_processes() and should not be frozen */
#include <linux/preempt.h>
#include <linux/lockdep.h>
#include <linux/compiler.h>
+#include <linux/kcsan.h>
#include <asm/processor.h>
+/*
+ * The seqlock interface does not prescribe a precise sequence of read
+ * begin/retry/end. For readers, typically there is a call to
+ * read_seqcount_begin() and read_seqcount_retry(), however, there are more
+ * esoteric cases which do not follow this pattern.
+ *
+ * As a consequence, we take the following best-effort approach for raw usage
+ * via seqcount_t under KCSAN: upon beginning a seq-reader critical section,
+ * pessimistically mark the next KCSAN_SEQLOCK_REGION_MAX memory accesses as
+ * atomics; if there is a matching read_seqcount_retry() call, no following
+ * memory operations are considered atomic. Usage of seqlocks via seqlock_t
+ * interface is not affected.
+ */
+#define KCSAN_SEQLOCK_REGION_MAX 1000
+
/*
* Version using sequence counter only.
* This can be used when code has its own mutex protecting the
local_irq_save(flags);
seqcount_acquire_read(&l->dep_map, 0, 0, _RET_IP_);
- seqcount_release(&l->dep_map, 1, _RET_IP_);
+ seqcount_release(&l->dep_map, _RET_IP_);
local_irq_restore(flags);
}
cpu_relax();
goto repeat;
}
+ kcsan_atomic_next(KCSAN_SEQLOCK_REGION_MAX);
return ret;
}
{
unsigned ret = READ_ONCE(s->sequence);
smp_rmb();
+ kcsan_atomic_next(KCSAN_SEQLOCK_REGION_MAX);
return ret;
}
{
unsigned ret = READ_ONCE(s->sequence);
smp_rmb();
+ kcsan_atomic_next(KCSAN_SEQLOCK_REGION_MAX);
return ret & ~1;
}
*/
static inline int __read_seqcount_retry(const seqcount_t *s, unsigned start)
{
- return unlikely(s->sequence != start);
+ kcsan_atomic_next(0);
+ return unlikely(READ_ONCE(s->sequence) != start);
}
/**
static inline void raw_write_seqcount_begin(seqcount_t *s)
{
+ kcsan_nestable_atomic_begin();
s->sequence++;
smp_wmb();
}
{
smp_wmb();
s->sequence++;
+ kcsan_nestable_atomic_end();
}
/**
* usual consistency guarantee. It is one wmb cheaper, because we can
* collapse the two back-to-back wmb()s.
*
+ * Note that writes surrounding the barrier should be declared atomic (e.g.
+ * via WRITE_ONCE): a) to ensure the writes become visible to other threads
+ * atomically, avoiding compiler optimizations; b) to document which writes are
+ * meant to propagate to the reader critical section. This is necessary because
+ * neither writes before and after the barrier are enclosed in a seq-writer
+ * critical section that would ensure readers are aware of ongoing writes.
+ *
* seqcount_t seq;
* bool X = true, Y = false;
*
*
* void write(void)
* {
- * Y = true;
+ * WRITE_ONCE(Y, true);
*
* raw_write_seqcount_barrier(seq);
*
- * X = false;
+ * WRITE_ONCE(X, false);
* }
*/
static inline void raw_write_seqcount_barrier(seqcount_t *s)
{
+ kcsan_nestable_atomic_begin();
s->sequence++;
smp_wmb();
s->sequence++;
+ kcsan_nestable_atomic_end();
}
static inline int raw_read_seqcount_latch(seqcount_t *s)
static inline void write_seqcount_end(seqcount_t *s)
{
- seqcount_release(&s->dep_map, 1, _RET_IP_);
+ seqcount_release(&s->dep_map, _RET_IP_);
raw_write_seqcount_end(s);
}
static inline void write_seqcount_invalidate(seqcount_t *s)
{
smp_wmb();
+ kcsan_nestable_atomic_begin();
s->sequence+=2;
+ kcsan_nestable_atomic_end();
}
typedef struct {
*/
static inline unsigned read_seqbegin(const seqlock_t *sl)
{
- return read_seqcount_begin(&sl->seqcount);
+ unsigned ret = read_seqcount_begin(&sl->seqcount);
+
+ kcsan_atomic_next(0); /* non-raw usage, assume closing read_seqretry() */
+ kcsan_flat_atomic_begin();
+ return ret;
}
static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start)
{
+ /*
+ * Assume not nested: read_seqretry() may be called multiple times when
+ * completing read critical section.
+ */
+ kcsan_flat_atomic_end();
+
return read_seqcount_retry(&sl->seqcount, start);
}
#include <linux/rodata_test.h>
#include <linux/jump_label.h>
#include <linux/mem_encrypt.h>
+ #include <linux/file.h>
+#include <linux/kcsan.h>
#include <asm/io.h>
#include <asm/bugs.h>
acpi_subsystem_init();
arch_post_acpi_subsys_init();
sfi_init_late();
+ kcsan_init();
/* Do the rest non-__init'ed, we're now alive */
arch_call_rest_init();
"See Linux Documentation/admin-guide/init.rst for guidance.");
}
+ void console_on_rootfs(void)
+ {
+ struct file *file;
+ unsigned int i;
+
+ /* Open /dev/console in kernelspace, this should never fail */
+ file = filp_open("/dev/console", O_RDWR, 0);
+ if (IS_ERR(file))
+ goto err_out;
+
+ /* create stdin/stdout/stderr, this should never fail */
+ for (i = 0; i < 3; i++) {
+ if (f_dupfd(i, file, 0) != i)
+ goto err_out;
+ }
+
+ return;
+
+ err_out:
+ /* no panic -- this might not be fatal */
+ pr_err("Warning: unable to open an initial console.\n");
+ return;
+ }
+
static noinline void __init kernel_init_freeable(void)
{
/*
do_basic_setup();
- /* Open the /dev/console on the rootfs, this should never fail */
- if (ksys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
- pr_err("Warning: unable to open an initial console.\n");
+ console_on_rootfs();
- (void) ksys_dup(0);
- (void) ksys_dup(0);
/*
* check if there is an early userspace init. If yes, let it do all
* the work
# Prevents flicker of uninteresting __do_softirq()/__local_bh_disable_ip()
# in coverage traces.
KCOV_INSTRUMENT_softirq.o := n
+# Avoid KCSAN instrumentation in softirq ("No shared variables, all the data
+# are CPU local" => assume no data races), to reduce overhead in interrupts.
+KCSAN_SANITIZE_softirq.o = n
# These are called from save_stack_trace() on slub debug path,
# and produce insane amounts of uninteresting coverage.
KCOV_INSTRUMENT_module.o := n
# Don't self-instrument.
KCOV_INSTRUMENT_kcov.o := n
KASAN_SANITIZE_kcov.o := n
+KCSAN_SANITIZE_kcov.o := n
CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
# cond_syscall is currently not LTO compatible
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_CPU_PM) += cpu_pm.o
obj-$(CONFIG_BPF) += bpf/
+obj-$(CONFIG_KCSAN) += kcsan/
obj-$(CONFIG_PERF_EVENTS) += events/
obj-$(CONFIG_HAS_IOMEM) += iomem.o
obj-$(CONFIG_RSEQ) += rseq.o
+ obj-$(CONFIG_SYSCTL_KUNIT_TEST) += sysctl-test.o
+
obj-$(CONFIG_GCC_PLUGIN_STACKLEAK) += stackleak.o
KASAN_SANITIZE_stackleak.o := n
+KCSAN_SANITIZE_stackleak.o := n
KCOV_INSTRUMENT_stackleak.o := n
$(obj)/configs.o: $(obj)/config_data.gz
$(obj)/kheaders.o: $(obj)/kheaders_data.tar.xz
quiet_cmd_genikh = CHK $(obj)/kheaders_data.tar.xz
- cmd_genikh = $(BASH) $(srctree)/kernel/gen_kheaders.sh $@
+ cmd_genikh = $(CONFIG_SHELL) $(srctree)/kernel/gen_kheaders.sh $@
$(obj)/kheaders_data.tar.xz: FORCE
$(call cmd,genikh)
lineno : line number of the debug statement
module : module that contains the debug statement
function : function that contains the debug statement
- flags : '=p' means the line is turned 'on' for printing
- format : the format used for the debug statement
+ flags : '=p' means the line is turned 'on' for printing
+ format : the format used for the debug statement
From a live system:
See Documentation/admin-guide/dynamic-debug-howto.rst for additional
information.
+ config SYMBOLIC_ERRNAME
+ bool "Support symbolic error names in printf"
+ default y if PRINTK
+ help
+ If you say Y here, the kernel's printf implementation will
+ be able to print symbolic error names such as ENOSPC instead
+ of the number 28. It makes the kernel image slightly larger
+ (about 3KB), but can make the kernel logs easier to read.
+
+ config DEBUG_BUGVERBOSE
+ bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT
+ depends on BUG && (GENERIC_BUG || HAVE_DEBUG_BUGVERBOSE)
+ default y
+ help
+ Say Y here to make BUG() panics output the file name and line number
+ of the BUG call as well as the EIP and oops trace. This aids
+ debugging but costs about 70-100K of memory.
+
endmenu # "printk and dmesg options"
menu "Compile-time checks and compiler options"
bool "Compile the kernel with debug info"
depends on DEBUG_KERNEL && !COMPILE_TEST
help
- If you say Y here the resulting kernel image will include
+ If you say Y here the resulting kernel image will include
debugging info resulting in a larger kernel image.
This adds debug symbols to the kernel and modules (gcc -g), and
is needed if you intend to use kernel crashdump or binary object
get_wchan() and suchlike.
config READABLE_ASM
- bool "Generate readable assembler code"
- depends on DEBUG_KERNEL
- help
- Disable some compiler optimizations that tend to generate human unreadable
- assembler output. This may make the kernel slightly slower, but it helps
- to keep kernel developers who have to stare a lot at assembler listings
- sane.
-
- config DEBUG_FS
- bool "Debug Filesystem"
+ bool "Generate readable assembler code"
+ depends on DEBUG_KERNEL
help
- debugfs is a virtual file system that kernel developers use to put
- debugging files into. Enable this option to be able to read and
- write to these files.
-
- For detailed documentation on the debugfs API, see
- Documentation/filesystems/.
-
- If unsure, say N.
+ Disable some compiler optimizations that tend to generate human unreadable
+ assembler output. This may make the kernel slightly slower, but it helps
+ to keep kernel developers who have to stare a lot at assembler listings
+ sane.
config HEADERS_INSTALL
bool "Install uapi headers to usr/include"
user-space program samples. It is also needed by some features such
as uapi header sanity checks.
- config HEADERS_CHECK
- bool "Run sanity checks on uapi headers when building 'all'"
- depends on HEADERS_INSTALL
- help
- This option will run basic sanity checks on uapi headers when
- building the 'all' target, for example, ensure that they do not
- attempt to include files which were not exported, etc.
-
- If you're making modifications to header files which are
- relevant for userspace, say 'Y'.
-
config OPTIMIZE_INLINING
def_bool y
help
endmenu # "Compiler options"
+ menu "Generic Kernel Debugging Instruments"
+
config MAGIC_SYSRQ
bool "Magic SysRq key"
depends on !UML
This option allows you to decide whether you want to enable the
magic SysRq key.
+ config DEBUG_FS
+ bool "Debug Filesystem"
+ help
+ debugfs is a virtual file system that kernel developers use to put
+ debugging files into. Enable this option to be able to read and
+ write to these files.
+
+ For detailed documentation on the debugfs API, see
+ Documentation/filesystems/.
+
+ If unsure, say N.
+
+ source "lib/Kconfig.kgdb"
+
+ source "lib/Kconfig.ubsan"
+
+ endmenu
+
config DEBUG_KERNEL
bool "Kernel debugging"
help
config DEBUG_OBJECTS_ENABLE_DEFAULT
int "debug_objects bootup default value (0-1)"
- range 0 1
- default "1"
- depends on DEBUG_OBJECTS
- help
- Debug objects boot parameter default value
+ range 0 1
+ default "1"
+ depends on DEBUG_OBJECTS
+ help
+ Debug objects boot parameter default value
config DEBUG_SLAB
bool "Debug slab memory allocations"
This option will slow down process creation somewhat.
+ config SCHED_STACK_END_CHECK
+ bool "Detect stack corruption on calls to schedule()"
+ depends on DEBUG_KERNEL
+ default n
+ help
+ This option checks for a stack overrun on calls to schedule().
+ If the stack end location is found to be over written always panic as
+ the content of the corrupted region can no longer be trusted.
+ This is to ensure no erroneous behaviour occurs which could result in
+ data corruption or a sporadic crash at a later stage once the region
+ is examined. The runtime overhead introduced is minimal.
+
config DEBUG_VM
bool "Debug VM"
depends on DEBUG_KERNEL
help
Enable this to turn on extended checks in the virtual-memory system
- that may impact performance.
+ that may impact performance.
If unsure, say N.
endmenu # "Memory Debugging"
- config ARCH_HAS_KCOV
- bool
- help
- An architecture should select this when it can successfully
- build and run with CONFIG_KCOV. This typically requires
- disabling instrumentation for some early boot code.
-
- config CC_HAS_SANCOV_TRACE_PC
- def_bool $(cc-option,-fsanitize-coverage=trace-pc)
-
- config KCOV
- bool "Code coverage for fuzzing"
- depends on ARCH_HAS_KCOV
- depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
- select DEBUG_FS
- select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
- help
- KCOV exposes kernel code coverage information in a form suitable
- for coverage-guided fuzzing (randomized testing).
-
- If RANDOMIZE_BASE is enabled, PC values will not be stable across
- different machines and across reboots. If you need stable PC values,
- disable RANDOMIZE_BASE.
-
- For more details, see Documentation/dev-tools/kcov.rst.
-
- config KCOV_ENABLE_COMPARISONS
- bool "Enable comparison operands collection by KCOV"
- depends on KCOV
- depends on $(cc-option,-fsanitize-coverage=trace-cmp)
- help
- KCOV also exposes operands of every comparison in the instrumented
- code along with operand sizes and PCs of the comparison instructions.
- These operands can be used by fuzzing engines to improve the quality
- of fuzzing coverage.
-
- config KCOV_INSTRUMENT_ALL
- bool "Instrument all code by default"
- depends on KCOV
- default y
- help
- If you are doing generic system call fuzzing (like e.g. syzkaller),
- then you will want to instrument the whole kernel and you should
- say y here. If you are doing more targeted fuzzing (like e.g.
- filesystem fuzzing with AFL) then you will want to enable coverage
- for more specific subsets of files, and should say n here.
-
config DEBUG_SHIRQ
bool "Debug shared IRQ handlers"
depends on DEBUG_KERNEL
Drivers ought to be able to handle interrupts coming in at those
points; some don't and need to be caught.
- menu "Debug Lockups and Hangs"
+ menu "Debug Oops, Lockups and Hangs"
+
+ config PANIC_ON_OOPS
+ bool "Panic on Oops"
+ help
+ Say Y here to enable the kernel to panic when it oopses. This
+ has the same effect as setting oops=panic on the kernel command
+ line.
+
+ This feature is useful to ensure that the kernel does not do
+ anything erroneous after an oops which could result in data
+ corruption or other issues.
+
+ Say N if unsure.
+
+ config PANIC_ON_OOPS_VALUE
+ int
+ range 0 1
+ default 0 if !PANIC_ON_OOPS
+ default 1 if PANIC_ON_OOPS
+
+ config PANIC_TIMEOUT
+ int "panic timeout"
+ default 0
+ help
+ Set the timeout value (in seconds) until a reboot occurs when the
+ the kernel panics. If n = 0, then we wait forever. A timeout
+ value n > 0 will wait n seconds before rebooting, while a timeout
+ value n < 0 will reboot immediately.
config LOCKUP_DETECTOR
bool
endmenu # "Debug lockups and hangs"
- config PANIC_ON_OOPS
- bool "Panic on Oops"
- help
- Say Y here to enable the kernel to panic when it oopses. This
- has the same effect as setting oops=panic on the kernel command
- line.
-
- This feature is useful to ensure that the kernel does not do
- anything erroneous after an oops which could result in data
- corruption or other issues.
-
- Say N if unsure.
-
- config PANIC_ON_OOPS_VALUE
- int
- range 0 1
- default 0 if !PANIC_ON_OOPS
- default 1 if PANIC_ON_OOPS
-
- config PANIC_TIMEOUT
- int "panic timeout"
- default 0
- help
- Set the timeout value (in seconds) until a reboot occurs when the
- the kernel panics. If n = 0, then we wait forever. A timeout
- value n > 0 will wait n seconds before rebooting, while a timeout
- value n < 0 will reboot immediately.
+ menu "Scheduler Debugging"
config SCHED_DEBUG
bool "Collect scheduler debugging info"
application, you can say N to avoid the very slight overhead
this adds.
- config SCHED_STACK_END_CHECK
- bool "Detect stack corruption on calls to schedule()"
- depends on DEBUG_KERNEL
- default n
- help
- This option checks for a stack overrun on calls to schedule().
- If the stack end location is found to be over written always panic as
- the content of the corrupted region can no longer be trusted.
- This is to ensure no erroneous behaviour occurs which could result in
- data corruption or a sporadic crash at a later stage once the region
- is examined. The runtime overhead introduced is minimal.
+ endmenu
config DEBUG_TIMEKEEPING
bool "Enable extra timekeeping sanity checking"
config HAVE_DEBUG_BUGVERBOSE
bool
- config DEBUG_BUGVERBOSE
- bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT
- depends on BUG && (GENERIC_BUG || HAVE_DEBUG_BUGVERBOSE)
- default y
- help
- Say Y here to make BUG() panics output the file name and line number
- of the BUG call as well as the EIP and oops trace. This aids
- debugging but costs about 70-100K of memory.
+ menu "Debug kernel data structures"
config DEBUG_LIST
bool "Debug linked list manipulation"
This is a relatively cheap check but if you care about maximum
performance, say N.
+ config BUG_ON_DATA_CORRUPTION
+ bool "Trigger a BUG when data corruption is detected"
+ select DEBUG_LIST
+ help
+ Select this option if the kernel should BUG when it encounters
+ data corruption in kernel memory structures when they get checked
+ for validity.
+
+ If unsure, say N.
+
+ endmenu
+
config DEBUG_CREDENTIALS
bool "Debug credential management"
depends on DEBUG_KERNEL
be impacted.
config DEBUG_BLOCK_EXT_DEVT
- bool "Force extended block device numbers and spread them"
+ bool "Force extended block device numbers and spread them"
depends on DEBUG_KERNEL
depends on BLOCK
default n
Say N if your are unsure.
+ config LATENCYTOP
+ bool "Latency measuring infrastructure"
+ depends on DEBUG_KERNEL
+ depends on STACKTRACE_SUPPORT
+ depends on PROC_FS
+ select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
+ select KALLSYMS
+ select KALLSYMS_ALL
+ select STACKTRACE
+ select SCHEDSTATS
+ select SCHED_DEBUG
+ help
+ Enable this option if you want to use the LatencyTOP tool
+ to find out which userspace is blocking on what kernel operations.
+
+ source "kernel/trace/Kconfig"
+
+ config PROVIDE_OHCI1394_DMA_INIT
+ bool "Remote debugging over FireWire early on boot"
+ depends on PCI && X86
+ help
+ If you want to debug problems which hang or crash the kernel early
+ on boot and the crashing machine has a FireWire port, you can use
+ this feature to remotely access the memory of the crashed machine
+ over FireWire. This employs remote DMA as part of the OHCI1394
+ specification which is now the standard for FireWire controllers.
+
+ With remote DMA, you can monitor the printk buffer remotely using
+ firescope and access all memory below 4GB using fireproxy from gdb.
+ Even controlling a kernel debugger is possible using remote DMA.
+
+ Usage:
+
+ If ohci1394_dma=early is used as boot parameter, it will initialize
+ all OHCI1394 controllers which are found in the PCI config space.
+
+ As all changes to the FireWire bus such as enabling and disabling
+ devices cause a bus reset and thereby disable remote DMA for all
+ devices, be sure to have the cable plugged and FireWire enabled on
+ the debugging host before booting the debug target for debugging.
+
+ This code (~1k) is freed after boot. By then, the firewire stack
+ in charge of the OHCI-1394 controllers should be used instead.
+
+ See Documentation/debugging-via-ohci1394.txt for more information.
+
+ source "samples/Kconfig"
+
++source "lib/Kconfig.kcsan"
++
+ config ARCH_HAS_DEVMEM_IS_ALLOWED
+ bool
+
+ config STRICT_DEVMEM
+ bool "Filter access to /dev/mem"
+ depends on MMU && DEVMEM
+ depends on ARCH_HAS_DEVMEM_IS_ALLOWED
+ default y if PPC || X86 || ARM64
+ help
+ If this option is disabled, you allow userspace (root) access to all
+ of memory, including kernel and userspace memory. Accidental
+ access to this is obviously disastrous, but specific access can
+ be used by people debugging the kernel. Note that with PAT support
+ enabled, even in this case there are restrictions on /dev/mem
+ use due to the cache aliasing requirements.
+
+ If this option is switched on, and IO_STRICT_DEVMEM=n, the /dev/mem
+ file only allows userspace access to PCI space and the BIOS code and
+ data regions. This is sufficient for dosemu and X and all common
+ users of /dev/mem.
+
+ If in doubt, say Y.
+
+ config IO_STRICT_DEVMEM
+ bool "Filter I/O access to /dev/mem"
+ depends on STRICT_DEVMEM
+ help
+ If this option is disabled, you allow userspace (root) access to all
+ io-memory regardless of whether a driver is actively using that
+ range. Accidental access to this is obviously disastrous, but
+ specific access can be used by people debugging kernel drivers.
+
+ If this option is switched on, the /dev/mem file only allows
+ userspace access to *idle* io-memory ranges (see /proc/iomem) This
+ may break traditional users of /dev/mem (dosemu, legacy X, etc...)
+ if the driver using a given range cannot be disabled.
+
+ If in doubt, say Y.
+
+ menu "$(SRCARCH) Debugging"
+
+ source "arch/$(SRCARCH)/Kconfig.debug"
+
+ endmenu
+
+ menu "Kernel Testing and Coverage"
+
+ source "lib/kunit/Kconfig"
+
config NOTIFIER_ERROR_INJECTION
tristate "Notifier error injection"
depends on DEBUG_KERNEL
help
Provide stacktrace filter for fault-injection capabilities
- config LATENCYTOP
- bool "Latency measuring infrastructure"
- depends on DEBUG_KERNEL
- depends on STACKTRACE_SUPPORT
- depends on PROC_FS
- select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && !ARM && !ARC && !X86
- select KALLSYMS
- select KALLSYMS_ALL
- select STACKTRACE
- select SCHEDSTATS
- select SCHED_DEBUG
+ config ARCH_HAS_KCOV
+ bool
help
- Enable this option if you want to use the LatencyTOP tool
- to find out which userspace is blocking on what kernel operations.
-
- source "kernel/trace/Kconfig"
+ An architecture should select this when it can successfully
+ build and run with CONFIG_KCOV. This typically requires
+ disabling instrumentation for some early boot code.
- config PROVIDE_OHCI1394_DMA_INIT
- bool "Remote debugging over FireWire early on boot"
- depends on PCI && X86
- help
- If you want to debug problems which hang or crash the kernel early
- on boot and the crashing machine has a FireWire port, you can use
- this feature to remotely access the memory of the crashed machine
- over FireWire. This employs remote DMA as part of the OHCI1394
- specification which is now the standard for FireWire controllers.
+ config CC_HAS_SANCOV_TRACE_PC
+ def_bool $(cc-option,-fsanitize-coverage=trace-pc)
- With remote DMA, you can monitor the printk buffer remotely using
- firescope and access all memory below 4GB using fireproxy from gdb.
- Even controlling a kernel debugger is possible using remote DMA.
- Usage:
+ config KCOV
+ bool "Code coverage for fuzzing"
+ depends on ARCH_HAS_KCOV
+ depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
+ select DEBUG_FS
+ select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
+ help
+ KCOV exposes kernel code coverage information in a form suitable
+ for coverage-guided fuzzing (randomized testing).
- If ohci1394_dma=early is used as boot parameter, it will initialize
- all OHCI1394 controllers which are found in the PCI config space.
+ If RANDOMIZE_BASE is enabled, PC values will not be stable across
+ different machines and across reboots. If you need stable PC values,
+ disable RANDOMIZE_BASE.
- As all changes to the FireWire bus such as enabling and disabling
- devices cause a bus reset and thereby disable remote DMA for all
- devices, be sure to have the cable plugged and FireWire enabled on
- the debugging host before booting the debug target for debugging.
+ For more details, see Documentation/dev-tools/kcov.rst.
- This code (~1k) is freed after boot. By then, the firewire stack
- in charge of the OHCI-1394 controllers should be used instead.
+ config KCOV_ENABLE_COMPARISONS
+ bool "Enable comparison operands collection by KCOV"
+ depends on KCOV
+ depends on $(cc-option,-fsanitize-coverage=trace-cmp)
+ help
+ KCOV also exposes operands of every comparison in the instrumented
+ code along with operand sizes and PCs of the comparison instructions.
+ These operands can be used by fuzzing engines to improve the quality
+ of fuzzing coverage.
- See Documentation/debugging-via-ohci1394.txt for more information.
+ config KCOV_INSTRUMENT_ALL
+ bool "Instrument all code by default"
+ depends on KCOV
+ default y
+ help
+ If you are doing generic system call fuzzing (like e.g. syzkaller),
+ then you will want to instrument the whole kernel and you should
+ say y here. If you are doing more targeted fuzzing (like e.g.
+ filesystem fuzzing with AFL) then you will want to enable coverage
+ for more specific subsets of files, and should say n here.
menuconfig RUNTIME_TESTING_MENU
bool "Runtime Testing"
If unsure, say N.
+ config SYSCTL_KUNIT_TEST
+ bool "KUnit test for sysctl"
+ depends on KUNIT
+ help
+ This builds the proc sysctl unit test, which runs on boot.
+ Tests the API contract and implementation correctness of sysctl.
+ For more information on KUnit and unit tests in general please refer
+ to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+ If unsure, say N.
+
+ config LIST_KUNIT_TEST
+ bool "KUnit Test for Kernel Linked-list structures"
+ depends on KUNIT
+ help
+ This builds the linked list KUnit test suite.
+ It tests that the API and basic functionality of the list_head type
+ and associated macros.
+
+ KUnit tests run during boot and output the results to the debug log
+ in TAP format (http://testanything.org/). Only useful for kernel devs
+ running the KUnit test harness, and not intended for inclusion into a
+ production build.
+
+ For more information on KUnit and unit tests in general please refer
+ to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+ If unsure, say N.
+
config TEST_UDELAY
tristate "udelay test driver"
help
memtest=17, mean do 17 test patterns.
If you are unsure how to answer this question, answer N.
- config BUG_ON_DATA_CORRUPTION
- bool "Trigger a BUG when data corruption is detected"
- select DEBUG_LIST
- help
- Select this option if the kernel should BUG when it encounters
- data corruption in kernel memory structures when they get checked
- for validity.
-
- If unsure, say N.
-
- source "samples/Kconfig"
- source "lib/Kconfig.kgdb"
-
- source "lib/Kconfig.ubsan"
- source "lib/Kconfig.kcsan"
-
- config ARCH_HAS_DEVMEM_IS_ALLOWED
- bool
-
- config STRICT_DEVMEM
- bool "Filter access to /dev/mem"
- depends on MMU && DEVMEM
- depends on ARCH_HAS_DEVMEM_IS_ALLOWED
- default y if PPC || X86 || ARM64
- ---help---
- If this option is disabled, you allow userspace (root) access to all
- of memory, including kernel and userspace memory. Accidental
- access to this is obviously disastrous, but specific access can
- be used by people debugging the kernel. Note that with PAT support
- enabled, even in this case there are restrictions on /dev/mem
- use due to the cache aliasing requirements.
-
- If this option is switched on, and IO_STRICT_DEVMEM=n, the /dev/mem
- file only allows userspace access to PCI space and the BIOS code and
- data regions. This is sufficient for dosemu and X and all common
- users of /dev/mem.
-
- If in doubt, say Y.
-
- config IO_STRICT_DEVMEM
- bool "Filter I/O access to /dev/mem"
- depends on STRICT_DEVMEM
- ---help---
- If this option is disabled, you allow userspace (root) access to all
- io-memory regardless of whether a driver is actively using that
- range. Accidental access to this is obviously disastrous, but
- specific access can be used by people debugging kernel drivers.
-
- If this option is switched on, the /dev/mem file only allows
- userspace access to *idle* io-memory ranges (see /proc/iomem) This
- may break traditional users of /dev/mem (dosemu, legacy X, etc...)
- if the driver using a given range cannot be disabled.
-
- If in doubt, say Y.
+ config HYPERV_TESTING
+ bool "Microsoft Hyper-V driver testing"
+ default n
+ depends on HYPERV && DEBUG_FS
+ help
+ Select this option to enable Hyper-V vmbus testing.
- source "arch/$(SRCARCH)/Kconfig.debug"
+ endmenu # "Kernel Testing and Coverage"
endmenu # Kernel hacking
CFLAGS_string.o := $(call cc-option, -fno-stack-protector)
endif
+# Used by KCSAN while enabled, avoid recursion.
+KCSAN_SANITIZE_random32.o := n
+
lib-y := ctype.o string.o vsprintf.o cmdline.o \
rbtree.o radix-tree.o timerqueue.o xarray.o \
- idr.o extable.o \
- sha1.o chacha.o irq_regs.o argv_split.o \
+ idr.o extable.o sha1.o irq_regs.o argv_split.o \
flex_proportions.o ratelimit.o show_mem.o \
is_single_threaded.o plist.o decompress.o kobject_uevent.o \
earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
+ obj-$(CONFIG_KUNIT) += kunit/
+
ifeq ($(CONFIG_DEBUG_KOBJECT),y)
CFLAGS_kobject.o += -DDEBUG
CFLAGS_kobject_uevent.o += -DDEBUG
obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
- obj-y += logic_pio.o
+ lib-y += logic_pio.o
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
obj-$(CONFIG_DYNAMIC_DEBUG) += dynamic_debug.o
+ obj-$(CONFIG_SYMBOLIC_ERRNAME) += errname.o
obj-$(CONFIG_NLATTR) += nlattr.o
obj-$(CONFIG_SG_SPLIT) += sg_split.o
obj-$(CONFIG_SG_POOL) += sg_pool.o
+ obj-$(CONFIG_MEMREGION) += memregion.o
obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
obj-$(CONFIG_IRQ_POLL) += irq_poll.o
obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
obj-$(CONFIG_OBJAGG) += objagg.o
+
+ # KUnit tests
+ obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
KASAN_SANITIZE_slab.o := n
KASAN_SANITIZE_slub.o := n
+# These produce frequent data race reports: most of them are due to races on
+# the same word but accesses to different bits of that word. Re-enable KCSAN
+# for these when we have more consensus on what to do about them.
+KCSAN_SANITIZE_slab_common.o := n
+KCSAN_SANITIZE_slab.o := n
+KCSAN_SANITIZE_slub.o := n
+KCSAN_SANITIZE_page_alloc.o := n
+
# These files are disabled because they produce non-interesting and/or
# flaky coverage that is not a function of syscall inputs. E.g. slab is out of
# free pages, or a task is migrated between nodes.
obj-$(CONFIG_ZONE_DEVICE) += memremap.o
obj-$(CONFIG_HMM_MIRROR) += hmm.o
obj-$(CONFIG_MEMFD_CREATE) += memfd.o
+ obj-$(CONFIG_MAPPING_DIRTY_HELPERS) += mapping_dirty_helpers.o
extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
endif
- # Test self-contained headers
-
- # Wildcard searches in $(srctree)/$(src)/, but not in $(objtree)/$(obj)/.
- # Stale generated headers are often left over, so pattern matching should
- # be avoided. Please notice $(srctree)/$(src)/ and $(objtree)/$(obj) point
- # to the same location for in-tree building. So, header-test-pattern-y should
- # be used with care.
- header-test-y += $(filter-out $(header-test-), \
- $(patsubst $(srctree)/$(src)/%, %, \
- $(wildcard $(addprefix $(srctree)/$(src)/, \
- $(header-test-pattern-y)))))
-
- extra-$(CONFIG_HEADER_TEST) += $(addsuffix .s, $(header-test-y) $(header-test-m))
-
# Add subdir path
extra-y := $(addprefix $(obj)/,$(extra-y))
$(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
$(CFLAGS_KCOV))
endif
+
+#
+# Enable KCSAN flags except some files or directories we don't want to check
+# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
+#
+ifeq ($(CONFIG_KCSAN),y)
+_c_flags += $(if $(patsubst n%,, \
+ $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \
+ $(CFLAGS_KCSAN))
+endif
# $(srctree)/$(src) for including checkin headers from generated source files
# $(objtree)/$(obj) for including generated headers from checkin source files
"usercopy_abort",
"machine_real_restart",
"rewind_stack_do_exit",
+ "kunit_try_catch_throw",
};
if (!func)
"__asan_report_store4_noabort",
"__asan_report_store8_noabort",
"__asan_report_store16_noabort",
+ /* KCSAN */
+ "kcsan_found_watchpoint",
+ "kcsan_setup_watchpoint",
+ /* KCSAN/TSAN */
+ "__tsan_func_entry",
+ "__tsan_func_exit",
+ "__tsan_read_range",
+ "__tsan_write_range",
+ "__tsan_read1",
+ "__tsan_read2",
+ "__tsan_read4",
+ "__tsan_read8",
+ "__tsan_read16",
+ "__tsan_write1",
+ "__tsan_write2",
+ "__tsan_write4",
+ "__tsan_write8",
+ "__tsan_write16",
/* KCOV */
"write_comp_data",
"__sanitizer_cov_trace_pc",
"ubsan_type_mismatch_common",
"__ubsan_handle_type_mismatch",
"__ubsan_handle_type_mismatch_v1",
+ "__ubsan_handle_shift_out_of_bounds",
/* misc */
"csum_partial_copy_generic",
"__memcpy_mcsafe",
projects / linux.git / commitdiff