There is no explanation about subdir-y.
Let's document it.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
The difference between extra-y and always-y is obscure.
Basically, Kbuild builds targets listed in extra-y and always-y in
visited Makefiles without relying on any dependency.
The difference is that extra-y is used to list the targets needed for
vmlinux whereas always-y is used to list the targets that must be always
built irrespective of final targets.
Kbuild skips extra-y when it is building only modules (i.e.
'make modules'). This is the long-standing behavior since extra-y was
introduced in 2003, and it is explained in that commit log [1].
For clarification, this is the extra-y vs always-y table:
extra-y always-y
'make' y y
'make vmlinux' y y
'make modules' n y
Kbuild skips extra-y also when building external modules since obviously
it never builds vmlinux.
Unfortunately, extra-y is wrongly used in many places of upstream code,
and even in external modules.
Using extra-y in external module Makefiles is wrong. What you should
use is probably always-y or 'targets'.
The current documentation for extra-y is misleading. I rewrote it, and
moved it to the section 3.7.
always-y is not documented anywhere. I added.
[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?id=f94e5fd7e5d09a56a60670a9bb211a791654bba8
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
The if_changed macro is currently explained in the section
"Commands useful for building a boot image", but the use of
if_changed is not limited to the boot image.
It is often used together with custom rules. Let's split it as a
separate section, and insert it after the "Custom Rules" section.
I slightly reworded the explanation, re-numbered to fill the <deleted>
section, and also fixed the broken indentation of the Note: part.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
The two sections "3.10 Special Rules" and "7.8 Custom kbuild commands"
are related because you must understand both of them when you write
custom rules.
Actually I do not understand the policy about what to go into
"3 The kbuild files" and what into "7 Architecture Makefile".
This commit reworks the custom rule explanation as follows:
- Merged "7.8 Custom kbuild commands" into "3.10 Special Rules".
- Reword "Special Rules" to "Custom Rules" for consistency.
- Update the example for kecho because the blackfin Makefile
does not exist any more.
- Replace the example for cmd_<command> with a simpler one.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Fix stale information:
- Fix the section number in the reference from 6.4 to 7.4.
- Remove init-y and net-y. They were removed by commit 23febe375d
("kbuild: merge init-y into core-y") and commit 95fb6317b3
("kbuild: merge net-y and virt-y into drivers-y"), respectively.
- Update the example because arch/sparc64/Makefile does not exit.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Precisely speaking, the arch directory is specified by $(SRCARCH),
not $(ARCH).
In old days, $(ARCH) actually matched to the arch directory because
32-bit and 64-bit were supported as separate architectures.
Most architectures (except arm/arm64) were unified like follows:
arch/i386, arch/x86_64 -> arch/x86
arch/sh, arch/sh64 -> arch/sh
arch/sparc, arch/sparc64 -> arch/sparc
To not break the user interface, commit 6752ed90da ("Kbuild: allow
arch/xxx to use a different source path") introduced SRCARCH to point
to the arch directory, still allowing to pass in the former ARCH=i386
or ARCH=x86_64.
Update the documents for preciseness, and add the explanation of SRCARCH.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
This line was written in 2003. Now we have much more Makefiles.
The number of Makefiles is not important. The point is we have a
Makefile in (almost) every directory.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Change every shebang which does not need an argument to use /usr/bin/env.
This is needed as not every distro has everything under /usr/bin,
sometimes not even bash.
Signed-off-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
In case the bootconfig is created on one kind of endian machine, and then
read on the other kind of endian kernel, the size and checksum will be
incorrect. Instead, have both the size and checksum always be little
endian and have the tool and the kernel convert it from little endian to
or from the host endian.
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Merge tag 'trace-v5.10-rc6-bootconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull bootconfig fixes from Steven Rostedt:
"Have bootconfig size and checksum be little endian
In case the bootconfig is created on one kind of endian machine, and
then read on the other kind of endian kernel, the size and checksum
will be incorrect. Instead, have both the size and checksum always be
little endian and have the tool and the kernel convert it from little
endian to or from the host endian"
* tag 'trace-v5.10-rc6-bootconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
docs: bootconfig: Add the endianness of fields
tools/bootconfig: Store size and checksum in footer as le32
bootconfig: Load size and checksum in the footer as le32
- Use correct timestamp variable for ring buffer write stamp update
- Fix up before stamp and write stamp when crossing ring buffer sub
buffers
- Keep a zero delta in ring buffer in slow path if cmpxchg fails
- Fix trace_printk static buffer for archs that care
- Fix ftrace record accounting for ftrace ops with trampolines
- Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency
- Remove WARN_ON in hwlat tracer that triggers on something that is OK
- Make "my_tramp" trampoline in ftrace direct sample code global
- Fixes in the bootconfig tool for better alignment management
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Merge tag 'trace-v5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- Use correct timestamp variable for ring buffer write stamp update
- Fix up before stamp and write stamp when crossing ring buffer sub
buffers
- Keep a zero delta in ring buffer in slow path if cmpxchg fails
- Fix trace_printk static buffer for archs that care
- Fix ftrace record accounting for ftrace ops with trampolines
- Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency
- Remove WARN_ON in hwlat tracer that triggers on something that is OK
- Make "my_tramp" trampoline in ftrace direct sample code global
- Fixes in the bootconfig tool for better alignment management
* tag 'trace-v5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ring-buffer: Always check to put back before stamp when crossing pages
ftrace: Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency
ftrace: Fix updating FTRACE_FL_TRAMP
tracing: Fix alignment of static buffer
tracing: Remove WARN_ON in start_thread()
samples/ftrace: Mark my_tramp[12]? global
ring-buffer: Set the right timestamp in the slow path of __rb_reserve_next()
ring-buffer: Update write stamp with the correct ts
docs: bootconfig: Update file format on initrd image
tools/bootconfig: Align the bootconfig applied initrd image size to 4
tools/bootconfig: Fix to check the write failure correctly
tools/bootconfig: Fix errno reference after printf()
Add a description about the endianness of the size and the checksum
fields. Those must be stored as le32 instead of u32. This will allow
us to apply bootconfig to the cross build initrd without caring
the endianness.
Link: https://lkml.kernel.org/r/160583936246.547349.10964204130590955409.stgit@devnote2
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
GPIO_ACTIVE_x flags are not correct in the context of interrupt flags.
These are simple defines so they could be used in DTS but they will not
have the same meaning:
1. GPIO_ACTIVE_HIGH = 0 = IRQ_TYPE_NONE
2. GPIO_ACTIVE_LOW = 1 = IRQ_TYPE_EDGE_RISING
Correct the interrupt flags, assuming the author of the code wanted same
logical behavior behind the name "ACTIVE_xxx", this is:
ACTIVE_LOW => IRQ_TYPE_LEVEL_LOW
ACTIVE_HIGH => IRQ_TYPE_LEVEL_HIGH
Fixes: a1a8b4594f ("NFC: pn544: i2c: Add DTS Documentation")
Fixes: 6be88670fc ("NFC: nxp-nci_i2c: Add I2C support to NXP NCI driver")
Fixes: e3b3292215 ("dt-bindings: can: tcan4x5x: Update binding to use interrupt property")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for tcan4x5x.txt
Link: https://lore.kernel.org/r/20201026153620.89268-1-krzk@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
and can subtrees.
Current release - regressions:
- gro_cells: reduce number of synchronize_net() calls
- ch_ktls: release a lock before jumping to an error path
Current release - always broken:
- tcp: Allow full IP tos/IPv6 tclass to be reflected in L3 header
Previous release - regressions:
- net/tls: fix missing received data after fast remote close
- vsock/virtio: discard packets only when socket is really closed
- sock: set sk_err to ee_errno on dequeue from errq
- cxgb4: fix the panic caused by non smac rewrite
Previous release - always broken:
- tcp: fix corner cases around setting ECN with BPF selection
of congestion control
- tcp: fix race condition when creating child sockets from
syncookies on loopback interface
- usbnet: ipheth: fix connectivity with iOS 14
- tun: honor IOCB_NOWAIT flag
- net/packet: fix packet receive on L3 devices without visible
hard header
- devlink: Make sure devlink instance and port are in same net
namespace
- net: openvswitch: fix TTL decrement action netlink message format
- bonding: wait for sysfs kobject destruction before freeing
struct slave
- net: stmmac: fix upstream patch applied to the wrong context
- bnxt_en: fix return value and unwind in probe error paths
Misc:
- devlink: add extra layer of categorization to the reload stats
uAPI before it's released
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes for 5.10-rc6, including fixes from the WiFi driver,
and CAN subtrees.
Current release - regressions:
- gro_cells: reduce number of synchronize_net() calls
- ch_ktls: release a lock before jumping to an error path
Current release - always broken:
- tcp: Allow full IP tos/IPv6 tclass to be reflected in L3 header
Previous release - regressions:
- net/tls: fix missing received data after fast remote close
- vsock/virtio: discard packets only when socket is really closed
- sock: set sk_err to ee_errno on dequeue from errq
- cxgb4: fix the panic caused by non smac rewrite
Previous release - always broken:
- tcp: fix corner cases around setting ECN with BPF selection of
congestion control
- tcp: fix race condition when creating child sockets from syncookies
on loopback interface
- usbnet: ipheth: fix connectivity with iOS 14
- tun: honor IOCB_NOWAIT flag
- net/packet: fix packet receive on L3 devices without visible hard
header
- devlink: Make sure devlink instance and port are in same net
namespace
- net: openvswitch: fix TTL decrement action netlink message format
- bonding: wait for sysfs kobject destruction before freeing struct
slave
- net: stmmac: fix upstream patch applied to the wrong context
- bnxt_en: fix return value and unwind in probe error paths
Misc:
- devlink: add extra layer of categorization to the reload stats uAPI
before it's released"
* tag 'net-5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
sock: set sk_err to ee_errno on dequeue from errq
mptcp: fix NULL ptr dereference on bad MPJ
net: openvswitch: fix TTL decrement action netlink message format
can: af_can: can_rx_unregister(): remove WARN() statement from list operation sanity check
can: m_can: m_can_dev_setup(): add support for bosch mcan version 3.3.0
can: m_can: fix nominal bitiming tseg2 min for version >= 3.1
can: m_can: m_can_open(): remove IRQF_TRIGGER_FALLING from request_threaded_irq()'s flags
can: mcp251xfd: mcp251xfd_probe(): bail out if no IRQ was given
can: gs_usb: fix endianess problem with candleLight firmware
ch_ktls: lock is not freed
net/tls: Protect from calling tls_dev_del for TLS RX twice
devlink: Make sure devlink instance and port are in same net namespace
devlink: Hold rtnl lock while reading netdev attributes
ptp: clockmatrix: bug fix for idtcm_strverscmp
enetc: Let the hardware auto-advance the taprio base-time of 0
gro_cells: reduce number of synchronize_net() calls
net: stmmac: fix incorrect merge of patch upstream
ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init
Documentation: netdev-FAQ: suggest how to post co-dependent series
ibmvnic: enhance resetting status check during module exit
...
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Merge tag 'media/v5.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull virtual digital TV driver fixes from Mauro Carvalho Chehab:
"A series of fixes for the new virtual digital TV driver (vidtv), which
is meant to help doing tests with the digital TV core and media
userspace apps and libraries.
They cover a series of issues I found on it, together with a few new
things in order to make it easier to detect problems at the DVB core"
* tag 'media/v5.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (36 commits)
media: vidtv.rst: add kernel-doc markups
media: vidtv.rst: update vidtv documentation
media: vidtv: simplify EIT write function
media: vidtv: simplify NIT write function
media: vidtv: simplify SDT write function
media: vidtv: cleanup PMT write table function
media: vidtv: cleanup PAT write function
media: vidtv: cleanup PSI table header function
media: vidtv: cleanup PSI descriptor write function
media: vidtv: simplify the crc writing logic
media: vidtv: simplify PSI write function
media: vidtv: add date to the current event
media: vidtv: fix service_id at SDT table
media: vidtv: fix service type
media: vidtv: add a PID entry for the NIT table
media: vidtv: properly fill EIT service_id
media: vidtv: fix the network ID range
media: vidtv: improve EIT data
media: vidtv: cleanup null packet initialization logic
media: vidtv: pre-initialize mux arrays
...
HDMI, unsupported modes, and vblank timeouts, a fix for ast to reload
the gamma LUT after changing the plane format and a double-free fix for
nouveau
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Merge tag 'drm-misc-fixes-2020-11-26' of ssh://git.freedesktop.org/git/drm/drm-misc into drm-fixes
A bunch of fixes for vc4 fixing some coexistence issue between wifi and
HDMI, unsupported modes, and vblank timeouts, a fix for ast to reload
the gamma LUT after changing the plane format and a double-free fix for
nouveau
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201126085450.r3i7wvj7pizsa4l6@gilmour
Implement an Event Information Table (EIT) as per EN 300 468
5.2.4.
The EIT provides information in chronological order regarding
the events contained within each service.
For now only present event information is supported.
[mchehab+huawei@kernel.org: removed an extra blank line]
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Add a Network Information Table (NIT) as specified in ETSI EN 300 468.
This table conveys information relating to the physical organization of
the multiplexes carried via a given network and the characteristics of
the network itself.
It is conveyed in the output of vidtv as packets with TS PID of 0x0010
[mchehab+huawei@kernel.org: removed an extra blank line]
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Make an explicit suggestion how to post user space side of kernel
patches to avoid reposts when patchwork groups the wrong patches.
v2: mention the cases unlike iproute2 explicitly
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Here are some small Staging and IIO driver fixes for 5.10-rc5. They
include:
- IIO fixes for reported regressions and problems
- new device ids for IIO drivers
- new device id for rtl8723bs driver
- staging ralink driver Kconfig dependency fix
- staging mt7621-pci bus resource fix
All of these have been in linux-next all week with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO fixes from Greg KH:
"Here are some small Staging and IIO driver fixes for 5.10-rc5. They
include:
- IIO fixes for reported regressions and problems
- new device ids for IIO drivers
- new device id for rtl8723bs driver
- staging ralink driver Kconfig dependency fix
- staging mt7621-pci bus resource fix
All of these have been in linux-next all week with no reported issues"
* tag 'staging-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
iio: accel: kxcjk1013: Add support for KIOX010A ACPI DSM for setting tablet-mode
iio: accel: kxcjk1013: Replace is_smo8500_device with an acpi_type enum
docs: ABI: testing: iio: stm32: remove re-introduced unsupported ABI
iio: light: fix kconfig dependency bug for VCNL4035
iio/adc: ingenic: Fix AUX/VBAT readings when touchscreen is used
iio/adc: ingenic: Fix battery VREF for JZ4770 SoC
staging: rtl8723bs: Add 024c:0627 to the list of SDIO device-ids
staging: ralink-gdma: fix kconfig dependency bug for DMA_RALINK
staging: mt7621-pci: avoid to request pci bus resources
iio: imu: st_lsm6dsx: set 10ms as min shub slave timeout
counter/ti-eqep: Fix regmap max_register
iio: adc: stm32-adc: fix a regression when using dma and irq
iio: adc: mediatek: fix unset field
iio: cros_ec: Use default frequencies when EC returns invalid information
A collection of small fixes: the only core change is a minor error
code handling in the control API, and all the rest are device-specific
fixes, mostly quirks, fixups and ASoC Intel fixes.
It looks boring, and good so.
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Merge tag 'sound-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes: the only core change is a minor error
code handling in the control API, and all the rest are device-specific
fixes, mostly quirks, fixups and ASoC Intel fixes.
It looks boring, and good so"
* tag 'sound-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: mixart: Fix mutex deadlock
ALSA: hda/ca0132: Fix compile warning without PCI
ASOC: Intel: kbl_rt5663_rt5514_max98927: Do not try to disable disabled clock
ALSA: usb-audio: Add delay quirk for all Logitech USB devices
ASoC: Intel: catpt: Correct clock selection for dai trigger
ASoC: Intel: catpt: Skip position update for unprepared streams
ASoC: qcom: lpass-platform: Fix memory leak
ASoC: Intel: KMB: Fix S24_LE configuration
ALSA: hda: Add Alderlake-S PCI ID and HDMI codec vid
ALSA: usb-audio: Use ALC1220-VB-DT mapping for ASUS ROG Strix TRX40 mobo
ALSA: firewire: Clean up a locking issue in copy_resp_to_buf()
ASoC: rt1015: increase the time to detect BCLK
ALSA: ctl: fix error path at adding user-defined element set
ALSA: hda/realtek - HP Headset Mic can't detect after boot
ALSA: hda/realtek - Add supported mute Led for HP
ALSA: hda/realtek: Add some Clove SSID in the ALC293(ALC1220)
ALSA: hda/realtek - Add supported for Lenovo ThinkPad Headset Button
ASoC: rt1015: add delay to fix pop noise from speaker
From Daniel's cover letter:
IBM Power9 processors can speculatively operate on data in the L1 cache
before it has been completely validated, via a way-prediction mechanism. It
is not possible for an attacker to determine the contents of impermissible
memory using this method, since these systems implement a combination of
hardware and software security measures to prevent scenarios where
protected data could be leaked.
However these measures don't address the scenario where an attacker induces
the operating system to speculatively execute instructions using data that
the attacker controls. This can be used for example to speculatively bypass
"kernel user access prevention" techniques, as discovered by Anthony
Steinhauser of Google's Safeside Project. This is not an attack by itself,
but there is a possibility it could be used in conjunction with
side-channels or other weaknesses in the privileged code to construct an
attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern.
This patch series flushes the L1 cache on kernel entry (patch 2) and after the
kernel performs any user accesses (patch 3). It also adds a self-test and
performs some related cleanups.
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Merge tag 'powerpc-cve-2020-4788' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Fixes for CVE-2020-4788.
From Daniel's cover letter:
IBM Power9 processors can speculatively operate on data in the L1
cache before it has been completely validated, via a way-prediction
mechanism. It is not possible for an attacker to determine the
contents of impermissible memory using this method, since these
systems implement a combination of hardware and software security
measures to prevent scenarios where protected data could be leaked.
However these measures don't address the scenario where an attacker
induces the operating system to speculatively execute instructions
using data that the attacker controls. This can be used for example to
speculatively bypass "kernel user access prevention" techniques, as
discovered by Anthony Steinhauser of Google's Safeside Project. This
is not an attack by itself, but there is a possibility it could be
used in conjunction with side-channels or other weaknesses in the
privileged code to construct an attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern.
This patch series flushes the L1 cache on kernel entry (patch 2) and
after the kernel performs any user accesses (patch 3). It also adds a
self-test and performs some related cleanups"
* tag 'powerpc-cve-2020-4788' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: rename pnv|pseries_setup_rfi_flush to _setup_security_mitigations
selftests/powerpc: refactor entry and rfi_flush tests
selftests/powerpc: entry flush test
powerpc: Only include kup-radix.h for 64-bit Book3S
powerpc/64s: flush L1D after user accesses
powerpc/64s: flush L1D on kernel entry
selftests/powerpc: rfi_flush: disable entry flush if present
- fix placement of cache alias remapping area
- disable preemption around cache alias management calls
- add missing __user annotation to strncpy_from_user argument
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Merge tag 'xtensa-20201119' of git://github.com/jcmvbkbc/linux-xtensa
Pull xtensa fixes from Max Filippov:
- fix placement of cache alias remapping area
- disable preemption around cache alias management calls
- add missing __user annotation to strncpy_from_user argument
* tag 'xtensa-20201119' of git://github.com/jcmvbkbc/linux-xtensa:
xtensa: uaccess: Add missing __user to strncpy_from_user() prototype
xtensa: disable preemption around cache alias management calls
xtensa: fix TLBTEMP area placement
The RaspberryPi4 has both a WiFi chip and HDMI outputs capable of doing
4k. Unfortunately, the 1440p resolution at 60Hz has a TMDS rate on the
HDMI cable right in the middle of the first Wifi channel.
Add a property to our HDMI controller, that could be reused by other
similar HDMI controllers, to allow the OS to take whatever measure is
necessary to avoid that crosstalk.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201029134018.1948636-1-maxime@cerno.tech
IBM Power9 processors can speculatively operate on data in the L1 cache
before it has been completely validated, via a way-prediction mechanism. It
is not possible for an attacker to determine the contents of impermissible
memory using this method, since these systems implement a combination of
hardware and software security measures to prevent scenarios where
protected data could be leaked.
However these measures don't address the scenario where an attacker induces
the operating system to speculatively execute instructions using data that
the attacker controls. This can be used for example to speculatively bypass
"kernel user access prevention" techniques, as discovered by Anthony
Steinhauser of Google's Safeside Project. This is not an attack by itself,
but there is a possibility it could be used in conjunction with
side-channels or other weaknesses in the privileged code to construct an
attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern. This patch flushes the L1 cache after user accesses.
This is part of the fix for CVE-2020-4788.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
IBM Power9 processors can speculatively operate on data in the L1 cache
before it has been completely validated, via a way-prediction mechanism. It
is not possible for an attacker to determine the contents of impermissible
memory using this method, since these systems implement a combination of
hardware and software security measures to prevent scenarios where
protected data could be leaked.
However these measures don't address the scenario where an attacker induces
the operating system to speculatively execute instructions using data that
the attacker controls. This can be used for example to speculatively bypass
"kernel user access prevention" techniques, as discovered by Anthony
Steinhauser of Google's Safeside Project. This is not an attack by itself,
but there is a possibility it could be used in conjunction with
side-channels or other weaknesses in the privileged code to construct an
attack.
This issue can be mitigated by flushing the L1 cache between privilege
boundaries of concern. This patch flushes the L1 cache on kernel entry.
This is part of the fix for CVE-2020-4788.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This Kunit update for Linux 5.10-rc5 consists of several fixes Kunit
documentation, tool, compile time fixes not pollute source directory,
and fix to remove tools/testing/kunit/.gitattributes file.
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Merge tag 'linux-kselftest-kunit-fixes-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kunit fixes from Shuah Khan:
"Several fixes to Kunit documentation and tools, and to not pollute
the source directory.
Also remove the incorrect kunit .gitattributes file"
* tag 'linux-kselftest-kunit-fixes-5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: fix display of failed expectations for strings
kunit: tool: fix extra trailing \n in raw + parsed test output
kunit: tool: print out stderr from make (like build warnings)
KUnit: Docs: usage: wording fixes
KUnit: Docs: style: fix some Kconfig example issues
KUnit: Docs: fix a wording typo
kunit: Do not pollute source directory with generated files (test.log)
kunit: Do not pollute source directory with generated files (.kunitconfig)
kunit: tool: fix pre-existing python type annotation errors
kunit: Fix kunit.py parse subcommand (use null build_dir)
kunit: tool: unmark test_data as binary blobs
fast_second_level_miss handler for the TLBTEMP area has an assumption
that page table directory entry for the TLBTEMP address range is 0. For
it to be true the TLBTEMP area must be aligned to 4MB boundary and not
share its 4MB region with anything that may use a page table. This is
not true currently: TLBTEMP shares space with vmalloc space which
results in the following kinds of runtime errors when
fast_second_level_miss loads page table directory entry for the vmalloc
space instead of fixing up the TLBTEMP area:
Unable to handle kernel paging request at virtual address c7ff0e00
pc = d0009275, ra = 90009478
Oops: sig: 9 [#1] PREEMPT
CPU: 1 PID: 61 Comm: kworker/u9:2 Not tainted 5.10.0-rc3-next-20201110-00007-g1fe4962fa983-dirty #58
Workqueue: xprtiod xs_stream_data_receive_workfn
a00: 90009478 d11e1dc0 c7ff0e00 00000020 c7ff0000 00000001 7f8b8107 00000000
a08: 900c5992 d11e1d90 d0cc88b8 5506e97c 00000000 5506e97c d06c8074 d11e1d90
pc: d0009275, ps: 00060310, depc: 00000014, excvaddr: c7ff0e00
lbeg: d0009275, lend: d0009287 lcount: 00000003, sar: 00000010
Call Trace:
xs_stream_data_receive_workfn+0x43c/0x770
process_one_work+0x1a1/0x324
worker_thread+0x1cc/0x3c0
kthread+0x10d/0x124
ret_from_kernel_thread+0xc/0x18
Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Remove unsupported ABI that has been re-introduced due to a rebase hunk.
This ABI has been moved in the past in commit b299d00420
("IIO: stm32: Remove quadrature related functions from trigger driver")
This also fixes a couple of warnings seen with:
./scripts/get_abi.pl validate 2>&1|grep iio
Fixes: 3443333284 ("docs: ABI: testing: make the files compatible with ReST output")
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Link: https://lore.kernel.org/r/1604685016-2434-1-git-send-email-fabrice.gasnier@st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since commit:
0e030a373d ("can: flexcan: fix endianess detection")
the fsl,imx53-flexcan isn't compatible with the fsl,p1010-flexcan any more. As
the former accesses the IP core in Little Endian mode and the latter uses Big
Endian mode.
With the conversion of the flexcan DT bindings to yaml, the dt_binding_check
this throws the following error:
Documentation/devicetree/bindings/clock/imx5-clock.example.dt.yaml: can@53fc8000: compatible: 'oneOf' conditional failed, one must be fixed:
['fsl,imx53-flexcan', 'fsl,p1010-flexcan'] is too long
Additional items are not allowed ('fsl,p1010-flexcan' was unexpected)
'fsl,imx53-flexcan' is not one of ['fsl,imx7d-flexcan', 'fsl,imx6ul-flexcan', 'fsl,imx6sx-flexcan']
'fsl,imx53-flexcan' is not one of ['fsl,ls1028ar1-flexcan']
'fsl,imx6q-flexcan' was expected
'fsl,lx2160ar1-flexcan' was expected
From schema: /builds/robherring/linux-dt-bindings/Documentation/devicetree/bindings/net/can/fsl,flexcan.yaml
The error is fixed by replacing the "fsl,p1010-flexcan" compatible
(which turned out the be incompatible) with "fsl,imx25-flexcan" in the
binding example.
Reported-by: Rob Herring <robh+dt@kernel.org>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20201111213548.1621094-1-mkl@pengutronix.de
[robh: Add "fsl,imx25-flexcan" as fallback]
Signed-off-by: Rob Herring <robh@kernel.org>
As both the i.MX35 and i.MX53 flexcan IP cores are compatible to the i.MX25,
they are listed as:
compatible = "fsl,imx35-flexcan", "fsl,imx25-flexcan";
and:
compatible = "fsl,imx53-flexcan", "fsl,imx25-flexcan";
in the SoC device trees.
This patch fixes the following errors, which shows up during a dtbs_check:
arch/arm/boot/dts/imx53-ard.dt.yaml: can@53fc8000: compatible: 'oneOf' conditional failed, one must be fixed:
['fsl,imx53-flexcan', 'fsl,imx25-flexcan'] is too long
Additional items are not allowed ('fsl,imx25-flexcan' was unexpected)
'fsl,imx53-flexcan' is not one of ['fsl,imx7d-flexcan', 'fsl,imx6ul-flexcan', 'fsl,imx6sx-flexcan']
'fsl,imx53-flexcan' is not one of ['fsl,ls1028ar1-flexcan']
'fsl,imx6q-flexcan' was expected
'fsl,lx2160ar1-flexcan' was expected
From schema: Documentation/devicetree/bindings/net/can/fsl,flexcan.yaml
Fixes: e5ab9aa7e4 ("dt-bindings: can: flexcan: convert fsl,*flexcan bindings to yaml")
Reported-by: Rob Herring <robh+dt@kernel.org>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20201111130507.1560881-4-mkl@pengutronix.de
[robh: drop singular fsl,imx53-flexcan and fsl,imx35-flexcan]
Signed-off-by: Rob Herring <robh@kernel.org>
Current release - regressions:
- arm64: dts: fsl-ls1028a-kontron-sl28: specify in-band mode for ENETC
Current release - bugs in new features:
- mptcp: provide rmem[0] limit offset to fix oops
Previous release - regressions:
- IPv6: Set SIT tunnel hard_header_len to zero to fix path MTU
calculations
- lan743x: correctly handle chips with internal PHY
- bpf: Don't rely on GCC __attribute__((optimize)) to disable GCSE
- mlx5e: Fix VXLAN port table synchronization after function reload
Previous release - always broken:
- bpf: Zero-fill re-used per-cpu map element
- net: udp: fix out-of-order packets when forwarding with UDP GSO
fraglists turned on
- fix UDP header access on Fast/frag0 UDP GRO
- fix IP header access and skb lookup on Fast/frag0 UDP GRO
- ethtool: netlink: add missing netdev_features_change() call
- net: Update window_clamp if SOCK_RCVBUF is set
- igc: Fix returning wrong statistics
- ch_ktls: fix multiple leaks and corner cases in Chelsio TLS offload
- tunnels: Fix off-by-one in lower MTU bounds for ICMP/ICMPv6 replies
- r8169: disable hw csum for short packets on all chip versions
- vrf: Fix fast path output packet handling with async Netfilter rules
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Current release - regressions:
- arm64: dts: fsl-ls1028a-kontron-sl28: specify in-band mode for
ENETC
Current release - bugs in new features:
- mptcp: provide rmem[0] limit offset to fix oops
Previous release - regressions:
- IPv6: Set SIT tunnel hard_header_len to zero to fix path MTU
calculations
- lan743x: correctly handle chips with internal PHY
- bpf: Don't rely on GCC __attribute__((optimize)) to disable GCSE
- mlx5e: Fix VXLAN port table synchronization after function reload
Previous release - always broken:
- bpf: Zero-fill re-used per-cpu map element
- fix out-of-order UDP packets when forwarding with UDP GSO fraglists
turned on:
- fix UDP header access on Fast/frag0 UDP GRO
- fix IP header access and skb lookup on Fast/frag0 UDP GRO
- ethtool: netlink: add missing netdev_features_change() call
- net: Update window_clamp if SOCK_RCVBUF is set
- igc: Fix returning wrong statistics
- ch_ktls: fix multiple leaks and corner cases in Chelsio TLS offload
- tunnels: Fix off-by-one in lower MTU bounds for ICMP/ICMPv6 replies
- r8169: disable hw csum for short packets on all chip versions
- vrf: Fix fast path output packet handling with async Netfilter
rules"
* tag 'net-5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (65 commits)
lan743x: fix use of uninitialized variable
net: udp: fix IP header access and skb lookup on Fast/frag0 UDP GRO
net: udp: fix UDP header access on Fast/frag0 UDP GRO
devlink: Avoid overwriting port attributes of registered port
vrf: Fix fast path output packet handling with async Netfilter rules
cosa: Add missing kfree in error path of cosa_write
net: switch to the kernel.org patchwork instance
ch_ktls: stop the txq if reaches threshold
ch_ktls: tcb update fails sometimes
ch_ktls/cxgb4: handle partial tag alone SKBs
ch_ktls: don't free skb before sending FIN
ch_ktls: packet handling prior to start marker
ch_ktls: Correction in middle record handling
ch_ktls: missing handling of header alone
ch_ktls: Correction in trimmed_len calculation
cxgb4/ch_ktls: creating skbs causes panic
ch_ktls: Update cheksum information
ch_ktls: Correction in finding correct length
cxgb4/ch_ktls: decrypted bit is not enough
net/x25: Fix null-ptr-deref in x25_connect
...
- Fix documentation regarding GPIO properties (Andy Shevchenko).
- Fix spelling mistakes in ACPI documentation (Flavio Suligoi).
- Fix white space inconsistencies in ACPI code (Maximilian Luz).
- Fix string formatting in the ACPI Generic Event Device (GED)
driver (Nick Desaulniers).
- Add Intel Alder Lake device IDs to the ACPI drivers used by the
Dynamic Platform and Thermal Framework (Srinivas Pandruvada).
- Add lid-related DMI quirk for Medion Akoya E2228T to the ACPI
button driver (Hans de Goede).
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Merge tag 'acpi-5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These are mostly docmentation fixes and janitorial changes plus some
new device IDs and a new quirk.
Specifics:
- Fix documentation regarding GPIO properties (Andy Shevchenko)
- Fix spelling mistakes in ACPI documentation (Flavio Suligoi)
- Fix white space inconsistencies in ACPI code (Maximilian Luz)
- Fix string formatting in the ACPI Generic Event Device (GED) driver
(Nick Desaulniers)
- Add Intel Alder Lake device IDs to the ACPI drivers used by the
Dynamic Platform and Thermal Framework (Srinivas Pandruvada)
- Add lid-related DMI quirk for Medion Akoya E2228T to the ACPI
button driver (Hans de Goede)"
* tag 'acpi-5.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: DPTF: Support Alder Lake
Documentation: ACPI: fix spelling mistakes
ACPI: button: Add DMI quirk for Medion Akoya E2228T
ACPI: GED: fix -Wformat
ACPI: Fix whitespace inconsistencies
ACPI: scan: Fix acpi_dma_configure_id() kerneldoc name
Documentation: firmware-guide: gpio-properties: Clarify initial output state
Documentation: firmware-guide: gpio-properties: active_low only for GpioIo()
Documentation: firmware-guide: gpio-properties: Fix factual mistakes
Move to the kernel.org patchwork instance, it has significantly
lower latency for accessing from Europe and the US. Other quirks
include the reply bot.
Link: https://lore.kernel.org/r/20201110035120.642746-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The fsl,stop-mode property is a phandle-array and should consist of one phandle
and two 32 bit integers, e.g.:
fsl,stop-mode = <&gpr 0x34 28>;
This patch fixes the following errors, which shows up during a dtbs_check:
arch/arm/boot/dts/imx6dl-apf6dev.dt.yaml: can@2090000: fsl,stop-mode: [[1, 52, 28]] is too short
From schema: Documentation/devicetree/bindings/net/can/fsl,flexcan.yaml
Fixes: e5ab9aa7e4 ("dt-bindings: can: flexcan: convert fsl,*flexcan bindings to yaml")
Reported-by: Rob Herring <robh+dt@kernel.org>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20201111130507.1560881-5-mkl@pengutronix.de
Signed-off-by: Rob Herring <robh@kernel.org>
Fix the Kconfig example to be closer to Kconfig coding style.
Also add punctuation and a trailing slash ('/') to a sub-directory
name -- this is how the text mostly appears in other Kconfig files.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: David Gow <davidgow@google.com>
Cc: linux-kselftest@vger.kernel.org
Cc: kunit-dev@googlegroups.com
Cc: Shuah Khan <shuah@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
- Fix compilation error when PMD and PUD are folded
- Fix regression in reads-as-zero behaviour of ID_AA64ZFR0_EL1
- Add aarch64 get-reg-list test
x86:
- fix semantic conflict between two series merged for 5.10
- fix (and test) enforcement of paravirtual cpuid features
Generic:
- various cleanups to memory management selftests
- new selftests testcase for performance of dirty logging
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"ARM:
- fix compilation error when PMD and PUD are folded
- fix regression in reads-as-zero behaviour of ID_AA64ZFR0_EL1
- add aarch64 get-reg-list test
x86:
- fix semantic conflict between two series merged for 5.10
- fix (and test) enforcement of paravirtual cpuid features
selftests:
- various cleanups to memory management selftests
- new selftests testcase for performance of dirty logging"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (30 commits)
KVM: selftests: allow two iterations of dirty_log_perf_test
KVM: selftests: Introduce the dirty log perf test
KVM: selftests: Make the number of vcpus global
KVM: selftests: Make the per vcpu memory size global
KVM: selftests: Drop pointless vm_create wrapper
KVM: selftests: Add wrfract to common guest code
KVM: selftests: Simplify demand_paging_test with timespec_diff_now
KVM: selftests: Remove address rounding in guest code
KVM: selftests: Factor code out of demand_paging_test
KVM: selftests: Use a single binary for dirty/clear log test
KVM: selftests: Always clear dirty bitmap after iteration
KVM: selftests: Add blessed SVE registers to get-reg-list
KVM: selftests: Add aarch64 get-reg-list test
selftests: kvm: test enforcement of paravirtual cpuid features
selftests: kvm: Add exception handling to selftests
selftests: kvm: Clear uc so UCALL_NONE is being properly reported
selftests: kvm: Fix the segment descriptor layout to match the actual layout
KVM: x86: handle MSR_IA32_DEBUGCTLMSR with report_ignored_msrs
kvm: x86: request masterclock update any time guest uses different msr
kvm: x86: ensure pv_cpuid.features is initialized when enabling cap
...
few other miscellaneous bug fixes and a cleanup for the MAINTAINERS
file.
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Merge tag 'ext4_for_linus_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes and cleanups from Ted Ts'o:
"More fixes and cleanups for the new fast_commit features, but also a
few other miscellaneous bug fixes and a cleanup for the MAINTAINERS
file"
* tag 'ext4_for_linus_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (28 commits)
jbd2: fix up sparse warnings in checkpoint code
ext4: fix sparse warnings in fast_commit code
ext4: cleanup fast commit mount options
jbd2: don't start fast commit on aborted journal
ext4: make s_mount_flags modifications atomic
ext4: issue fsdev cache flush before starting fast commit
ext4: disable fast commit with data journalling
ext4: fix inode dirty check in case of fast commits
ext4: remove unnecessary fast commit calls from ext4_file_mmap
ext4: mark buf dirty before submitting fast commit buffer
ext4: fix code documentatioon
ext4: dedpulicate the code to wait on inode that's being committed
jbd2: don't read journal->j_commit_sequence without taking a lock
jbd2: don't touch buffer state until it is filled
jbd2: add todo for a fast commit performance optimization
jbd2: don't pass tid to jbd2_fc_end_commit_fallback()
jbd2: don't use state lock during commit path
jbd2: drop jbd2_fc_init documentation
ext4: clean up the JBD2 API that initializes fast commits
jbd2: rename j_maxlen to j_total_len and add jbd2_journal_max_txn_bufs
...
GpioIo() doesn't provide an explicit state for an output pin.
Linux tries to be smart and uses a common sense based on other
parameters. Document how it looks like in the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It appears that people may misinterpret active_low field in _DSD
for GpioInt() resource. Add a paragraph to clarify this.
Reported-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix factual mistakes and style issues in GPIO properties document.
This converts IoRestriction from InputOnly to OutputOnly as pins
in the example are used as outputs.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Masahiro Yamada