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dm-flakey returns error on reads if no other argument is specified.
This commit simplifies associated logic while formalizing an
"error_reads" argument and an ERROR_READS flag.
If no argument is specified, set ERROR_READS flag so that it behaves
just like before this commit.
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
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Convert the ath10k bindings to YAML.
Dropped properties that are absent at the current state of mainline:
- qcom,msi_addr
- qcom,msi_base
Somewhat based on the ath11k bindings.
Signed-off-by: Konrad Dybcio <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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Add documentation changes for acbel-fsg032 psu
Signed-off-by: Lakshmi Yadlapati <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[groeck: Fixed alphabetic order in index.rst]
Signed-off-by: Guenter Roeck <[email protected]>
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Add new Acbel FSG032 power supply to trivial devices.
Signed-off-by: Lakshmi Yadlapati <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add a vendor prefix entry for acbel (https://www.acbel.com)
Signed-off-by: Lakshmi Yadlapati <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add vs-supply property.
Signed-off-by: Svyatoslav Ryhel <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Convert the PWM fan bindings to DT schema format.
Signed-off-by: Cristian Ciocaltea <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add driver for the StarFive JH71x0 temperature sensor. You
can enable/disable it and read temperature in milli Celcius
through sysfs.
Signed-off-by: Emil Renner Berthing <[email protected]>
Co-developed-by: Samin Guo <[email protected]>
Signed-off-by: Samin Guo <[email protected]>
Signed-off-by: Hal Feng <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add bindings for the temperature sensor on the StarFive JH7100 and
JH7110 SoCs.
Signed-off-by: Emil Renner Berthing <[email protected]>
Signed-off-by: Hal Feng <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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The definition comes from a LHM PR [1], and the mutex path from
the ACPI dump, kindly provided by the PR author [2]
[1] https://github.com/LibreHardwareMonitor/LibreHardwareMonitor/pull/1031
[2] https://github.com/zeule/asus-ec-sensors/issues/36
Signed-off-by: Eugene Shalygin <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add support for the ASUS ProArt B550-Creator board, was tested
with the hardware [1].
[1] https://github.com/zeule/asus-ec-sensors/issues/35
Signed-off-by: Eugene Shalygin <[email protected]>
Signed-off-by: fireflame90051 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Mails to Agathe Porte bounce ("550 5.4.1 Recipient address rejected:
Access denied. AS(201806281)").
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Remove description of deprecated registration functions from the hardware
monitoring kernel API documentation to help ensure that no attempts are
made to use them in new drivers.
Signed-off-by: Guenter Roeck <[email protected]>
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The commit 036d6a4e75c9 ("ABI: sysfs-class-hwmon: add ABI documentation
for it") moved all ABI attributes to the usual ABI documentation. But this
change left a stray colon for the fan speed control method. Fix this
to avoid a confusion of readers.
Fixes: 036d6a4e75c9 ("ABI: sysfs-class-hwmon: add ABI documentation for it")
Signed-off-by: Stefan Wahren <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Add the option to control fan PWM on Aquacomputer Aquaero. The Aquaero is
the most complex Aquacomputer device, control is therefore more complicated
then on already supported devices.
Setting PWM requires multiple steps. First, an internal static PWM
controller is set to the desired PWM value. Second, the fan is set to use
that PWM controller. Last, the minimum and maximum accepted PWM values
of the fan are set to allow all possible PWM values.
Signed-off-by: Leonard Anderweit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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Adds control over the Aquacomputer Aquaero temperature offset for all eight
temperature sensors.
Signed-off-by: Leonard Anderweit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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The Fujitsu OEM Mainboard business was acquired by Kontron,
so the specifications of the Teutates chip was transferred to
the new Kontron FTP server.
Update the specifications website accordingly. The outdated
sensors how-to was omitted.
Signed-off-by: Armin Wolf <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/djakov/icc into char-misc-next
Georgi writes:
interconnect changes for 6.4
This pull request contains the interconnect changes for the 6.4-rc1 merge
window, which this time are mostly cleanups.
Core changes:
interconnect: Skip call into provider if initial bw is zero
interconnect: Use of_property_present() for testing DT property presence
interconnect: drop racy registration API
interconnect: drop unused icc_link_destroy() interface
Driver changes:
interconnect: qcom: Drop obsolete dependency on COMPILE_TEST
interconnect: qcom: drop obsolete OSM_L3/EPSS defines
interconnect: qcom: osm-l3: drop unuserd header inclusion
interconnect: qcom: rpm: drop bogus pm domain attach
interconnect: qcom: rpm: make QoS INVALID default
interconnect: qcom: rpm: Add support for specifying channel num
interconnect: qcom: Sort kerneldoc entries
dt-bindings: interconnect: OSM L3: Add SM6375 CPUCP compatible
dt-bindings: interconnect: qcom,msm8998-bwmon: Resolve MSM8998 support
Signed-off-by: Georgi Djakov <[email protected]>
* tag 'icc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/djakov/icc:
dt-bindings: interconnect: qcom,msm8998-bwmon: Resolve MSM8998 support
dt-bindings: interconnect: OSM L3: Add SM6375 CPUCP compatible
interconnect: qcom: Sort kerneldoc entries
interconnect: qcom: rpm: Add support for specifying channel num
interconnect: qcom: rpm: make QoS INVALID default
interconnect: qcom: rpm: drop bogus pm domain attach
interconnect: drop unused icc_link_destroy() interface
interconnect: drop racy registration API
interconnect: Use of_property_present() for testing DT property presence
interconnect: qcom: osm-l3: drop unuserd header inclusion
interconnect: qcom: drop obsolete OSM_L3/EPSS defines
interconnect: Skip call into provider if initial bw is zero
interconnect: qcom: Drop obsolete dependency on COMPILE_TEST
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Network LEDs can exist in both the MAC and the PHY. Naming is
difficult because the netdev name is neither stable or unique, do to
commands like ip link set name eth42 dev eth0, and network
namesspaces.
Give some example names where the MAC and the PHY have unique names
based on device tree nodes, or PCI bus addresses.
Since the LED can be used for anything which Linux supports for LEDs,
avoid using names like activity or link, rather describe the location
on the RJ-45, of what the RJ-45 is expected to be used for, WAN/LAN
etc.
Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: Christian Marangi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Document support for LEDs node in phy and add an example for it.
PHY LED will have to match led pattern and should be treated as a
generic led.
Signed-off-by: Christian Marangi <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Add LEDs definition example for qca8k Switch Family to describe how they
should be defined for a correct usage.
Signed-off-by: Christian Marangi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Document support for LEDs node in ethernet-controller.
Ethernet Controller may support different LEDs that can be configured
for different operation like blinking on traffic event or port link.
Also add some Documentation to describe the difference of these nodes
compared to PHY LEDs, since ethernet-controller LEDs are controllable
by the ethernet controller regs and the possible intergated PHY doesn't
have control on them.
Signed-off-by: Christian Marangi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Evan Green <[email protected]> says:
There's been a bunch of off-list discussions about this, including at
Plumbers. The original plan was to do something involving providing an
ISA string to userspace, but ISA strings just aren't sufficient for a
stable ABI any more: in order to parse an ISA string users need the
version of the specifications that the string is written to, the version
of each extension (sometimes at a finer granularity than the RISC-V
releases/versions encode), and the expected use case for the ISA string
(ie, is it a U-mode or M-mode string). That's a lot of complexity to
try and keep ABI compatible and it's probably going to continue to grow,
as even if there's no more complexity in the specifications we'll have
to deal with the various ISA string parsing oddities that end up all
over userspace.
Instead this patch set takes a very different approach and provides a set
of key/value pairs that encode various bits about the system. The big
advantage here is that we can clearly define what these mean so we can
ensure ABI stability, but it also allows us to encode information that's
unlikely to ever appear in an ISA string (see the misaligned access
performance, for example). The resulting interface looks a lot like
what arm64 and x86 do, and will hopefully fit well into something like
ACPI in the future.
The actual user interface is a syscall, with a vDSO function in front of
it. The vDSO function can answer some queries without a syscall at all,
and falls back to the syscall for cases it doesn't have answers to.
Currently we prepopulate it with an array of answers for all keys and
a CPU set of "all CPUs". This can be adjusted as necessary to provide
fast answers to the most common queries.
An example series in glibc exposing this syscall and using it in an
ifunc selector for memcpy can be found at [1].
I was asked about the performance delta between this and something like
sysfs. I created a small test program and ran it on a Nezha D1
Allwinner board. Doing each operation 100000 times and dividing, these
operations take the following amount of time:
- open()+read()+close() of /sys/kernel/cpu_byteorder: 3.8us
- access("/sys/kernel/cpu_byteorder", R_OK): 1.3us
- riscv_hwprobe() vDSO and syscall: .0094us
- riscv_hwprobe() vDSO with no syscall: 0.0091us
These numbers get farther apart if we query multiple keys, as sysfs will
scale linearly with the number of keys, where the dedicated syscall
stays the same. To frame these numbers, I also did a tight
fork/exec/wait loop, which I measured as 4.8ms. So doing 4
open/read/close operations is a delta of about 0.3%, versus a single vDSO
call is a delta of essentially zero.
[1] https://patchwork.ozlabs.org/project/glibc/list/?series=343050
* b4-shazam-merge:
RISC-V: Add hwprobe vDSO function and data
selftests: Test the new RISC-V hwprobe interface
RISC-V: hwprobe: Support probing of misaligned access performance
RISC-V: hwprobe: Add support for RISCV_HWPROBE_BASE_BEHAVIOR_IMA
RISC-V: Add a syscall for HW probing
RISC-V: Move struct riscv_cpuinfo to new header
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
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Lists (items) with one item should be just const or enum because it is
shorter and simpler.
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Lists (items) with one item should be just enum because it is shorter,
simpler and does not confuse, if one wants to add new entry with a
fallback. Convert all of them to enums. OTOH, leave unused "oneOf"
entries in anticipation of further growth of the entire binding.
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Matthias Brugger <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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video-interface.txt does not exist anymore, as it has been converted
to video-interfaces.yaml.
Instead of referencing video-interfaces.yaml multiple times,
pass it as a $ref to the schema.
Signed-off-by: Fabio Estevam <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.
Reviewed-by: Linus Walleij <[email protected]>
Reviewed-by: Thierry Reding <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Add QDU1000 PDC, already used in upstreamed DTS.
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Delay accounting does not track the delay of IRQ/SOFTIRQ. While
IRQ/SOFTIRQ could have obvious impact on some workloads productivity, such
as when workloads are running on system which is busy handling network
IRQ/SOFTIRQ.
Get the delay of IRQ/SOFTIRQ could help users to reduce such delay. Such
as setting interrupt affinity or task affinity, using kernel thread for
NAPI etc. This is inspired by "sched/psi: Add PSI_IRQ to track
IRQ/SOFTIRQ pressure"[1]. Also fix some code indent problems of older
code.
And update tools/accounting/getdelays.c:
/ # ./getdelays -p 156 -di
print delayacct stats ON
printing IO accounting
PID 156
CPU count real total virtual total delay total delay average
15 15836008 16218149 275700790 18.380ms
IO count delay total delay average
0 0 0.000ms
SWAP count delay total delay average
0 0 0.000ms
RECLAIM count delay total delay average
0 0 0.000ms
THRASHING count delay total delay average
0 0 0.000ms
COMPACT count delay total delay average
0 0 0.000ms
WPCOPY count delay total delay average
36 7586118 0.211ms
IRQ count delay total delay average
42 929161 0.022ms
[1] commit 52b1364ba0b1("sched/psi: Add PSI_IRQ to track IRQ/SOFTIRQ pressure")
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Yang Yang <[email protected]>
Cc: Jiang Xuexin <[email protected]>
Cc: wangyong <[email protected]>
Cc: junhua huang <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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Since v6.3, checkpatch.pl now complains about the use of "Closes:" tags
followed by a link [1]. It also complains if a "Reported-by:" tag is
followed by a "Closes:" one [2].
As detailed in the first patch, this "Closes:" tag is used for a bit of
time, mainly by DRM and MPTCP subsystems. It is used by some bug trackers
to automate the closure of issues when a patch is accepted. It is even
planned to use this tag with bugzilla.kernel.org [3].
The first patch updates the documentation to explain what is this
"Closes:" tag and how/when to use it. The second patch modifies
checkpatch.pl to stop complaining about it.
The DRM maintainers and their mailing list have been added in Cc as they
are probably interested by these two patches as well.
[1] https://lore.kernel.org/all/3b036087d80b8c0e07a46a1dbaaf4ad0d018f8d5.1674217480.git.linux@leemhuis.info/
[2] https://lore.kernel.org/all/bb5dfd55ea2026303ab2296f4a6df3da7dd64006.1674217480.git.linux@leemhuis.info/
[3] https://lore.kernel.org/linux-doc/[email protected]/
This patch (of 5):
Making sure a bug tracker is up to date is not an easy task. For example,
a first version of a patch fixing a tracked issue can be sent a long time
after having created the issue. But also, it can take some time to have
this patch accepted upstream in its final form. When it is done, someone
-- probably not the person who accepted the patch -- has to remember about
closing the corresponding issue.
This task of closing and tracking the patch can be done automatically by
bug trackers like GitLab [1], GitHub [2] and hopefully soon [3]
bugzilla.kernel.org when the appropriated tag is used. The two first ones
accept multiple tags but it is probably better to pick one.
According to commit 76f381bb77a0 ("checkpatch: warn when unknown tags are used for links"),
the "Closes" tag seems to have been used in the past by a few people and
it is supported by popular bug trackers. Here is how it has been used in
the past:
$ git log --no-merges --format=email -P --grep='^Closes: http' | \
grep '^Closes: http' | cut -d/ -f3-5 | sort | uniq -c | sort -rn
391 gitlab.freedesktop.org/drm/intel
79 github.com/multipath-tcp/mptcp_net-next
8 gitlab.freedesktop.org/drm/msm
3 gitlab.freedesktop.org/drm/amd
2 gitlab.freedesktop.org/mesa/mesa
1 patchwork.freedesktop.org/series/73320
1 gitlab.freedesktop.org/lima/linux
1 gitlab.freedesktop.org/drm/nouveau
1 github.com/ClangBuiltLinux/linux
1 bugzilla.netfilter.org/show_bug.cgi?id=1579
1 bugzilla.netfilter.org/show_bug.cgi?id=1543
1 bugzilla.netfilter.org/show_bug.cgi?id=1436
1 bugzilla.netfilter.org/show_bug.cgi?id=1427
1 bugs.debian.org/625804
Likely here, the "Closes" tag was only properly used with GitLab and
GitHub. We can also see that it has been used quite a few times (and
still used recently) and this is then not a "random tag that makes no
sense" like it was the case with "BugLink" recently [4]. It has also been
misused but that was a long time ago, when it was common to use many
different random tags.
checkpatch.pl script should then stop complaining about this "Closes" tag.
As suggested by Thorsten [5], if this tag is accepted, it should first be
described in the documentation. This is what is done here in this patch.
To avoid confusion, the "Closes" should be used with any public bug
report. No need to check if the underlying bug tracker supports
automations. Having this tag with any kind of public bug reports allows
bots like regzbot to clearly identify patches fixing a specific bug and
avoid false-positives, e.g. patches mentioning it is related to an issue
but not fixing it. As suggested by Thorsten [6] again, if we follow the
same logic, the "Closes" tag should then be used after a "Reported-by"
one.
Note that thanks to this "Closes" tag, the mentioned bug trackers can also
locate where a patch has been applied in different branches and
repositories. If only the "Link" tag is used, the tracking can also be
done but the ticket will not be closed and a manual operation will be
needed. Also, these bug trackers have some safeguards: the closure is
only done if a commit having the "Closes:" tag is applied in a specific
branch. It will then not be closed if a random commit having the same tag
is published elsewhere. Also in case of closure, a notification is sent
to the owners.
Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-0-d26d1fa66f9f@tessares.net
Link: https://docs.gitlab.com/ee/user/project/issues/managing_issues.html#default-closing-pattern [1]
Link: https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/using-keywords-in-issues-and-pull-requests [2]
Link: https://lore.kernel.org/linux-doc/[email protected]/ [3]
Link: https://lore.kernel.org/all/CAHk-=wgs38ZrfPvy=nOwVkVzjpM3VFU1zobP37Fwd_h9iAD5JQ@mail.gmail.com/ [4]
Link: https://lore.kernel.org/all/[email protected]/ [5]
Link: https://lore.kernel.org/linux-doc/[email protected]/ [6]
Link: https://github.com/multipath-tcp/mptcp_net-next/issues/373
Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-1-d26d1fa66f9f@tessares.net
Signed-off-by: Matthieu Baerts <[email protected]>
Suggested-by: Thorsten Leemhuis <[email protected]>
Acked-by: Konstantin Ryabitsev <[email protected]>
Acked-by: Joe Perches <[email protected]>
Cc: Andy Whitcroft <[email protected]>
Cc: Bagas Sanjaya <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Dwaipayan Ray <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Kai Wasserbäch <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Lukas Bulwahn <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
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This allows userspace to select various routines to use based on the
performance of misaligned access on the target hardware.
Rather than adding DT bindings, this change taps into the alternatives
mechanism used to probe CPU errata. Add a new function pointer alongside
the vendor-specific errata_patch_func() that probes for desirable errata
(otherwise known as "features"). Unlike the errata_patch_func(), this
function is called on each CPU as it comes up, so it can save
feature information per-CPU.
The T-head C906 has fast unaligned access, both as defined by GCC [1],
and in performing a basic benchmark, which determined that byte copies
are >50% slower than a misaligned word copy of the same data size (source
for this test at [2]):
bytecopy size f000 count 50000 offset 0 took 31664899 us
wordcopy size f000 count 50000 offset 0 took 5180919 us
wordcopy size f000 count 50000 offset 1 took 13416949 us
[1] https://github.com/gcc-mirror/gcc/blob/master/gcc/config/riscv/riscv.cc#L353
[2] https://pastebin.com/EPXvDHSW
Co-developed-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Evan Green <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Paul Walmsley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
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We have an implicit set of base behaviors that userspace depends on,
which are mostly defined in various ISA specifications.
Co-developed-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Evan Green <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Reviewed-by: Paul Walmsley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
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We don't have enough space for these all in ELF_HWCAP{,2} and there's no
system call that quite does this, so let's just provide an arch-specific
one to probe for hardware capabilities. This currently just provides
m{arch,imp,vendor}id, but with the key-value pairs we can pass more in
the future.
Co-developed-by: Palmer Dabbelt <[email protected]>
Signed-off-by: Evan Green <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]>
Tested-by: Heiko Stuebner <[email protected]>
Reviewed-by: Paul Walmsley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>
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Loading modules with finit_module() can end up using vmalloc(), vmap()
and vmalloc() again, for a total of up to 3 separate allocations in the
worst case for a single module. We always kernel_read*() the module,
that's a vmalloc(). Then vmap() is used for the module decompression,
and if so the last read buffer is freed as we use the now decompressed
module buffer to stuff data into our copy module. The last allocation is
specific to each architectures but pretty much that's generally a series
of vmalloc() calls or a variation of vmalloc to handle ELF sections with
special permissions.
Evaluation with new stress-ng module support [1] with just 100 ops
is proving that you can end up using GiBs of data easily even with all
care we have in the kernel and userspace today in trying to not load modules
which are already loaded. 100 ops seems to resemble the sort of pressure a
system with about 400 CPUs can create on module loading. Although issues
relating to duplicate module requests due to each CPU inucurring a new
module reuest is silly and some of these are being fixed, we currently lack
proper tooling to help diagnose easily what happened, when it happened
and who likely is to blame -- userspace or kernel module autoloading.
Provide an initial set of stats which use debugfs to let us easily scrape
post-boot information about failed loads. This sort of information can
be used on production worklaods to try to optimize *avoiding* redundant
memory pressure using finit_module().
There's a few examples that can be provided:
A 255 vCPU system without the next patch in this series applied:
Startup finished in 19.143s (kernel) + 7.078s (userspace) = 26.221s
graphical.target reached after 6.988s in userspace
And 13.58 GiB of virtual memory space lost due to failed module loading:
root@big ~ # cat /sys/kernel/debug/modules/stats
Mods ever loaded 67
Mods failed on kread 0
Mods failed on decompress 0
Mods failed on becoming 0
Mods failed on load 1411
Total module size 11464704
Total mod text size 4194304
Failed kread bytes 0
Failed decompress bytes 0
Failed becoming bytes 0
Failed kmod bytes 14588526272
Virtual mem wasted bytes 14588526272
Average mod size 171115
Average mod text size 62602
Average fail load bytes 10339140
Duplicate failed modules:
module-name How-many-times Reason
kvm_intel 249 Load
kvm 249 Load
irqbypass 8 Load
crct10dif_pclmul 128 Load
ghash_clmulni_intel 27 Load
sha512_ssse3 50 Load
sha512_generic 200 Load
aesni_intel 249 Load
crypto_simd 41 Load
cryptd 131 Load
evdev 2 Load
serio_raw 1 Load
virtio_pci 3 Load
nvme 3 Load
nvme_core 3 Load
virtio_pci_legacy_dev 3 Load
virtio_pci_modern_dev 3 Load
t10_pi 3 Load
virtio 3 Load
crc32_pclmul 6 Load
crc64_rocksoft 3 Load
crc32c_intel 40 Load
virtio_ring 3 Load
crc64 3 Load
The following screen shot, of a simple 8vcpu 8 GiB KVM guest with the
next patch in this series applied, shows 226.53 MiB are wasted in virtual
memory allocations which due to duplicate module requests during boot.
It also shows an average module memory size of 167.10 KiB and an an
average module .text + .init.text size of 61.13 KiB. The end shows all
modules which were detected as duplicate requests and whether or not
they failed early after just the first kernel_read*() call or late after
we've already allocated the private space for the module in
layout_and_allocate(). A system with module decompression would reveal
more wasted virtual memory space.
We should put effort now into identifying the source of these duplicate
module requests and trimming these down as much possible. Larger systems
will obviously show much more wasted virtual memory allocations.
root@kmod ~ # cat /sys/kernel/debug/modules/stats
Mods ever loaded 67
Mods failed on kread 0
Mods failed on decompress 0
Mods failed on becoming 83
Mods failed on load 16
Total module size 11464704
Total mod text size 4194304
Failed kread bytes 0
Failed decompress bytes 0
Failed becoming bytes 228959096
Failed kmod bytes 8578080
Virtual mem wasted bytes 237537176
Average mod size 171115
Average mod text size 62602
Avg fail becoming bytes 2758544
Average fail load bytes 536130
Duplicate failed modules:
module-name How-many-times Reason
kvm_intel 7 Becoming
kvm 7 Becoming
irqbypass 6 Becoming & Load
crct10dif_pclmul 7 Becoming & Load
ghash_clmulni_intel 7 Becoming & Load
sha512_ssse3 6 Becoming & Load
sha512_generic 7 Becoming & Load
aesni_intel 7 Becoming
crypto_simd 7 Becoming & Load
cryptd 3 Becoming & Load
evdev 1 Becoming
serio_raw 1 Becoming
nvme 3 Becoming
nvme_core 3 Becoming
t10_pi 3 Becoming
virtio_pci 3 Becoming
crc32_pclmul 6 Becoming & Load
crc64_rocksoft 3 Becoming
crc32c_intel 3 Becoming
virtio_pci_modern_dev 2 Becoming
virtio_pci_legacy_dev 1 Becoming
crc64 2 Becoming
virtio 2 Becoming
virtio_ring 2 Becoming
[0] https://github.com/ColinIanKing/stress-ng.git
[1] echo 0 > /proc/sys/vm/oom_dump_tasks
./stress-ng --module 100 --module-name xfs
Signed-off-by: Luis Chamberlain <[email protected]>
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Add a compatible for the Power Domain Controller on SA8775p platforms.
Increase the number of PDC pin mappings.
Signed-off-by: Bartosz Golaszewski <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Remove compatible for stih415/stih416 and stid127 which are
no more supported.
Signed-off-by: Alain Volmat <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Horatiu Vultur <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Remove bindings for the stih415/stih416/stid127 since they are
not supported within the kernel anymore.
Signed-off-by: Alain Volmat <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
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Rockchip RK3588/RK3588s GIC600 integration does not support the
sharability feature. Rockchip assigned Erratum ID #3588001 for this
issue.
Note, that the 0x0201743b ID is not Rockchip specific and thus
there is an extra of_machine_is_compatible() check.
The flags are named FORCE_NON_SHAREABLE to be vendor agnostic,
since apparently similar integration design errors exist in other
platforms and they can reuse the same flag.
Co-developed-by: XiaoDong Huang <[email protected]>
Signed-off-by: XiaoDong Huang <[email protected]>
Co-developed-by: Kever Yang <[email protected]>
Signed-off-by: Kever Yang <[email protected]>
Co-developed-by: Lucas Tanure <[email protected]>
Signed-off-by: Lucas Tanure <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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Cleanup bindings dropping unneeded quotes. Once all these are fixed,
checking for this can be enabled in yamllint.
Signed-off-by: Rob Herring <[email protected]>
Reviewed-by: Mathieu Poirier <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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Add support for DLVR (Digital Linear Voltage Regulator) attributes,
which can be used to control RFIM.
Here instead of "fivr" another directory "dlvr" is created with DLVR
attributes:
/sys/bus/pci/devices/0000:00:04.0/dlvr
├── dlvr_freq_mhz
├── dlvr_freq_select
├── dlvr_hardware_rev
├── dlvr_pll_busy
├── dlvr_rfim_enable
└── dlvr_spread_spectrum_pct
└── dlvr_control_mode
└── dlvr_control_lock
Attributes
dlvr_freq_mhz (RO):
Current DLVR PLL frequency in MHz.
dlvr_freq_select (RW):
Sets DLVR PLL clock frequency.
dlvr_hardware_rev (RO):
DLVR hardware revision.
dlvr_pll_busy (RO):
PLL can't accept frequency change when set.
dlvr_rfim_enable (RW):
0: Disable RF frequency hopping, 1: Enable RF frequency hopping.
dlvr_control_mode (RW):
Specifies how frequencies are spread. 0: Down spread, 1: Spread in Center.
dlvr_control_lock (RW):
1: future writes are ignored.
dlvr_spread_spectrum_pct (RW)
A write to this register updates the DLVR spread spectrum percent value.
Signed-off-by: Srinivas Pandruvada <[email protected]>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <[email protected]>
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The supplies for PM6150L and PM8150L are the same, so they can be part
of one if-then block, for smaller code.
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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Convert the WM8728 audio CODEC bindings to DT schema
Signed-off-by: Saalim Quadri <[email protected]>
Acked-by: Charles Keepax <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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Convert the WM8737 audio CODEC bindings to DT schema
Signed-off-by: Saalim Quadri <[email protected]>
Acked-by: Charles Keepax <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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LoongArch maintains cache coherency in hardware, but when paired with
LS7A chipsets the WUC attribute (Weak-ordered UnCached, which is similar
to WriteCombine) is out of the scope of cache coherency machanism for
PCIe devices (this is a PCIe protocol violation, which may be fixed in
newer chipsets).
This means WUC can only used for write-only memory regions now, so this
option is disabled by default, making WUC silently fallback to SUC for
ioremap(). You can enable this option if the kernel is ensured to run on
hardware without this bug.
Kernel parameter writecombine=on/off can be used to override the Kconfig
option.
Cc: [email protected]
Suggested-by: WANG Xuerui <[email protected]>
Reviewed-by: WANG Xuerui <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>
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Add documentation to describe StarFive dwmac driver(GMAC).
Signed-off-by: Yanhong Wang <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Samin Guo <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>
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According to:
stmmac_platform.c: stmmac_probe_config_dt
stmmac_main.c: stmmac_dvr_probe
dwmac controller may require one (stmmaceth) or two (stmmaceth+ahb)
reset signals, and the maxItems of resets/reset-names is going to be 2.
The gmac of Starfive Jh7110 SOC must have two resets.
it uses snps,dwmac-5.20 IP.
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Samin Guo <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>
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Add dwmac-5.20 IP version to snps.dwmac.yaml
Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Emil Renner Berthing <[email protected]>
Signed-off-by: Samin Guo <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>
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Commit e523af4ee560 ("net/ice: Add support for enable_iwarp and enable_roce
devlink param") added support for the enable_roce and enable_iwarp
parameters in the ice driver. It didn't document these parameters in the
ice devlink documentation file. Add this documentation, including a note
about the mutual exclusion between the two modes.
Signed-off-by: Jacob Keller <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Acked-by: Tony Nguyen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
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PM8550 is different than PM8550VE/VS, because the latter has much
smaller amount of supplies (l1-3 and s1-6) and regulators. The PM8550
has on the other hand one pin for vdd-l1-l4-l10 supplies. Correct the
if:then: clause with their supplies.
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Abel Vesa <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
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Merge the following 6 patches from tip/x86/sev, which are taken from
Michael Kelley's series [0]. The rest of Michael's series depend on
them.
x86/hyperv: Change vTOM handling to use standard coco mechanisms
init: Call mem_encrypt_init() after Hyper-V hypercall init is done
x86/mm: Handle decryption/re-encryption of bss_decrypted consistently
Drivers: hv: Explicitly request decrypted in vmap_pfn() calls
x86/hyperv: Reorder code to facilitate future work
x86/ioremap: Add hypervisor callback for private MMIO mapping in coco VM
0: https://lore.kernel.org/linux-hyperv/[email protected]/
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