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* docs: submitting-patches: Advertise b4Mark Brown2024-09-051-0/+8
| | | | | | | | | | | | | b4 is now widely used and is quite helpful for a lot of the things that submitting-patches covers, let's advertise it to submitters to try to make their lives easier and reduce the number of procedural issues maintainers see. Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240905-documentation-b4-advert-v2-1-24d686ba4117@kernel.org
* docs: update dev-tools/kcsan.rst url about KTSANHaoyang Liu2024-09-041-1/+2
| | | | | | | | | | | | The KTSAN doc has moved to https://github.com/google/kernel-sanitizers/blob/master/KTSAN.md. Update the url in kcsan.rst accordingly. Signed-off-by: Haoyang Liu <tttturtleruss@hust.edu.cn> Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn> Acked-by: Marco Elver <elver@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240725174632.23803-1-tttturtleruss@hust.edu.cn
* Documentation/fs/9p: Expand goo.gl linkDr. David Alan Gilbert2024-08-271-1/+1
| | | | | | | | | | | | | The goo.gl URL shortener is deprecated and is due to stop expanding existing links in 2025. The old goo.gl link in the 9p docs doesn't work anyway, replace it by a kernel.org link suggested by Randy instead. Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240725180041.80862-1-linux@treblig.org
* Docs/translations/ko_KR: link memory-barriers wrapper with other language ↵SeongJae Park2024-08-272-12/+20
| | | | | | | | | | | | | | | | | versions The menu for documents of other available languages is created for documents in same file hierarchy under the translations/ directory. Because memory-barriers.txt of Korean translation is at the root index of translations/ directory while that for English is on core-api/wrappers/memory-barriers.rst, the Korean translation is not linked with other available language versions via the menu. Move the document under the same directory hierarchy to make it linked with other language versions. Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240826010949.78305-2-sj@kernel.org
* Docs/translations/ko_KR: link howto.rst with other language versionsSeongJae Park2024-08-272-1/+1
| | | | | | | | | | | | | | The menu for documents of other available languages is created for documents in same file hierarchy under the translations/ directory. Because howto.rst of Korean translation is at the root of translations/ directory while that for English is under howto/ directory, the Korean translation is not linked with other available language versions via the menu. Move the document under the same hierarchy to make it be linked with other langauge versions. Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240826010949.78305-1-sj@kernel.org
* doc: iio: Fix sysfs pathsThorsten Scherer2024-08-272-11/+11
| | | | | | | | Add missing 'devices' folder in the /sys/bus/iio path. Signed-off-by: Thorsten Scherer <t.scherer@eckelmann.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240805120357.21135-1-t.scherer@eckelmann.de
* Documentation: admin-guide: direct people to bug trackers, if specifiedJani Nikula2024-08-271-8/+9
| | | | | | | | | | | | | Update bug reporting info in bug-hunting.rst to direct people to driver/subsystem bug trackers, if explicitly specified with the MAINTAINERS "B:" entry. Use the new get_maintainer.pl --bug option to print the info. Cc: Joe Perches <joe@perches.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240815113450.3397499-2-jani.nikula@intel.com
* docs/zh_CN: Add dev-tools/kcsan Chinese translationHaoyang Liu2024-08-262-1/+321
| | | | | | | | | | | Translate dev-tools/kcsan commit 31f605a308e6 ("kcsan, compiler_types: Introduce __data_racy type qualifier") into Chinese and add it in dev-tools/zh_CN/index.rst Signed-off-by: Haoyang Liu <tttturtleruss@hust.edu.cn> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240817175151.164923-1-tttturtleruss@hust.edu.cn
* Fix typo "allocateed" to allocatedGianfranco Trad2024-08-261-1/+1
| | | | | | | | | Fix minor typo in the fault-injection documentation, where the word allocated was misspelled as "allocateed". Signed-off-by: Gianfranco Trad <gianf.trad@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240819110641.1931-1-gianf.trad@gmail.com
* docs: bug-bisect: rewrite to better match the other bisecting textThorsten Leemhuis2024-08-261-70/+138
| | | | | | | | | | | | | | | | | | | | | Rewrite the short document on bisecting kernel bugs. The new text improves .config handling, brings a mention of 'git bisect skip', and explains what to do after the bisection finished -- including trying a revert to verify the result. The rewrite at the same time removes the unrelated and outdated section on 'Devices not appearing' and replaces some sentences about bug reporting with a pointer to the document covering that topic in detail. This overall brings the approach close to the one in the recently added text Documentation/admin-guide/verify-bugs-and-bisect-regressions.rst. As those two texts serve a similar purpose for different audiences, mention that document in the head of this one and outline when the other might be the better one to follow. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> Reviewed-by: Petr Tesarik <petr@tesarici.cz> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/74dc0137dcc3e2c05648e885a7bc31ffd39a0890.1724312119.git.linux@leemhuis.info
* Documentation: add ublk driver ioctl numbersMing Lei2024-08-261-0/+1
| | | | | | | | | | | | ublk driver takes the following ioctl numbers: 'u' 00-2F linux/ublk_cmd.h So document it in ioctl-number.rst Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240823134339.1496916-1-ming.lei@redhat.com
* docs/sp_Sp: Add translation to spanish of the documentation related to EEVDFSergio González Collado2024-08-263-4/+63
| | | | | | | | | | Translate Documentation/scheduler/sched-eevdf.rst to Spanish. Signed-off-by: Sergio González Collado <sergio.collado@gmail.com> Reviewed-by: Carlos Bilbao <carlos.bilbao.osdev@gmail.com> [jc: fixed build warning] Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240824095402.7706-1-sergio.collado@gmail.com
* docs: leds: fix typo in Documentation/leds/leds-mlxcpld.rstAryabhatta Dey2024-08-261-1/+1
| | | | | | | | Change 'cylce' to 'cycle'. Signed-off-by: Aryabhatta Dey <aryabhattadey35@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/5nib2kj6uh7lkafrmmwcjpeyvs7megdfmseftkjws2wcuztoyc@yhidnl4ilbok
* docs: process: fix typos in Documentation/process/backporting.rstAryabhatta Dey2024-08-261-3/+3
| | | | | | | | | | Change 'submiting' to 'submitting', 'famliar' to 'familiar' and 'appared' to 'appeared'. Signed-off-by: Aryabhatta Dey <aryabhattadey35@gmail.com> Reviewed-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/rd2vu7z2t23ppafto4zxc6jge5mj7w7xnpmwywaa2e3eiojgf2@poicxprsdoks
* Documentation: Capitalize Fahrenheit in watchdog-api.rstDavid Hunter2024-08-171-1/+1
| | | | | | | | | Capitalize "fahrenheit," a spelling mistake. Signed-off-by: David Hunter <david.hunter.linux@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240807185332.61624-1-david.hunter.linux@gmail.com
* Documentation: devres: fix error about PCI devresPhilipp Stanner2024-08-171-1/+1
| | | | | | | | | | | | | | | | The documentation states that pcim_enable_device() will make "all PCI ops" managed. This is totally false, only a small subset of PCI functions become managed that way. Implicating otherwise has caused at least one bug so far, namely in commit 8558de401b5f ("drm/vboxvideo: use managed pci functions"). Change the function summary so the functions dangerous behavior becomes obvious. Signed-off-by: Philipp Stanner <pstanner@redhat.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240809095248.14220-2-pstanner@redhat.com
* Documentation: dontdiff: remove 'utf8data.h'ganjie2024-08-081-1/+1
| | | | | | | | | | | Commit 2b3d04787012 ("unicode: Add utf8-data module") changed the database file from 'utf8data.h' to 'utf8data.c' to build separate module, but it seems forgot to update Documentation/dontdiff. Remove 'utf8data.h' and add 'utf8data.c'. Signed-off-by: ganjie <ganjie5@huawei.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240808085707.3235019-1-guoxuenan@huawei.com
* docs: scheduler: Start documenting the EEVDF schedulerCarlos Bilbao2024-08-073-4/+50
| | | | | | | | Add some documentation regarding the newly introduced scheduler EEVDF. Signed-off-by: Carlos Bilbao <carlos.bilbao.osdev@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240720002207.444286-2-carlos.bilbao.osdev@gmail.com
* docs: dm-crypt: Removal of unexpected indentation errorShibu Kumar2024-08-071-7/+13
| | | | | | | | | | | | | Add the required indentation to fix this docs build error: Documentation/admin-guide/device-mapper/dm-crypt.rst:167: ERROR: Unexpected indentation. Also split the documentation for read and write into separate blocks. Signed-off-by: Shibu kumar shibukumar.bit@gmail.com [jc: rewrote changelog] Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240803183306.32425-1-shibukumar.bit@gmail.com
* docs: improve comment consistency in .muttrc example configurationJiamu Sun2024-08-071-1/+1
| | | | | | | | | Added a space to align comment formatting; this helps improve consistency and visual uniformity. Signed-off-by: Jiamu Sun <barroit@linux.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/SY0P300MB0801D1A4B278157CA7C92DE2CEBC2@SY0P300MB0801.AUSP300.PROD.OUTLOOK.COM
* docs: fault-injection: document cache-filter feature for failslabBreno Leitao2024-08-071-0/+20
| | | | | | | | | | | | | | | | | | | | The failslab fault injection mechanism has an undocumented capability that provides significant utility in testing and debugging. This feature, introduced in commit 4c13dd3b48fcb ("failslab: add ability to filter slab caches"), allows for targeted error injection into specific slab caches. However, it was inadvertently left undocumented at the time of its implementation. Add documentation for the cache-filter feature in the failslab mode description. Also, providing a practical example demonstrating how to use cache-filter to inject failures specifically when allocating socket buffers (skbs). Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240726120930.3231333-1-leitao@debian.org
* docs/zh_CN: fix a broken referenceDongliang Mu2024-07-301-1/+1
| | | | | | | | | | | | | Warning: Documentation/translations/zh_CN/kbuild/index.rst references a file that doesn't exist: Documentation/kbuild/index Fix this by adding its full name. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202407300812.1VvDFdxD-lkp@intel.com/ Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240730053652.4073433-1-dzm91@hust.edu.cn
* Documentation: Add detailed explanation for 'N' taint flagBenjamin Poirier2024-07-301-0/+2
| | | | | | | | | | | | Every taint flag has an entry in the "More detailed explanation" section except for the 'N' flag. That omission was probably just an oversight so add an entry for that flag. Signed-off-by: Benjamin Poirier <bpoirier@nvidia.com> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: David Gow <davidgow@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240717203521.514348-1-bpoirier@nvidia.com
* doc-guide: add help documentation checktransupdate.rstDongliang Mu2024-07-304-0/+111
| | | | | | | | | | | | This commit adds help documents - doc-guide/checktransupdate.rst and zh_CN/doc-guide/checktransupdate.rst for scripts/checktransupdate.py , including English and Chinese versions Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> [jc: fixed missing title problem in the new file] Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240719041400.3909775-3-dzm91@hust.edu.cn
* Documentation: ioctl: document 0x07 ioctl codeAlyssa Ross2024-07-291-0/+1
| | | | | | | | | | | | It looks like this was supposed to be documented when VSOCK was added[1], but it got lost in later submissions. Link: https://lore.kernel.org/20130109000024.3719.71468.stgit@promb-2n-dhcp175.eng.vmware.com/#Z31Documentation:ioctl:ioctl-number.txt [1] Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Signed-off-by: Alyssa Ross <hi@alyssa.is> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240725171120.12226-2-hi@alyssa.is
* docs/zh_CN: add the translation of kbuild/headers_install.rstDongliang Mu2024-07-293-1/+75
| | | | | | | | | | | | | | | Finish the translation of kbuild/headers_install.rst and kbuild/index.rst, then add kbuild into zh_CN/index.rst. Update to commit 5b67fbfc32b5 ("Merge tag 'kbuild-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild") Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn> Reviewed-by: Alex Shi <alexs@kernel.org> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> [jc: added missing EOF newline ] Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240726145754.2598197-1-dzm91@hust.edu.cn
* docs/core-api: memory-allocation: GFP_NOWAIT doesn't need __GFP_NOWARNDave Martin2024-07-291-2/+3
| | | | | | | | | | | | | | | Since v6.8 the definition of GFP_NOWAIT has implied __GFP_NOWARN, so it is now redundant to add this flag explicitly. Update the docs to match, and emphasise the need for a fallback when using GFP_NOWAIT. Fixes: 16f5dfbc851b ("gfp: include __GFP_NOWARN in GFP_NOWAIT") Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240729140127.244606-1-Dave.Martin@arm.com
* Merge tag 'cxl-for-6.11' of ↵Linus Torvalds2024-07-283-3/+208
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl Pull CXL updates from Dave Jiang: "Core: - A CXL maturity map has been added to the documentation to detail the current state of CXL enabling. It provides the status of the current state of various CXL features to inform current and future contributors of where things are and which areas need contribution. - A notifier handler has been added in order for a newly created CXL memory region to trigger the abstract distance metrics calculation. This should bring parity for CXL memory to the same level vs hotplugged DRAM for NUMA abstract distance calculation. The abstract distance reflects relative performance used for memory tiering handling. - An addition for XOR math has been added to address the CXL DPA to SPA translation. CXL address translation did not support address interleave math with XOR prior to this change. Fixes: - Fix to address race condition in the CXL memory hotplug notifier - Add missing MODULE_DESCRIPTION() for CXL modules - Fix incorrect vendor debug UUID define Misc: - A warning has been added to inform users of an unsupported configuration when mixing CXL VH and RCH/RCD hierarchies - The ENXIO error code has been replaced with EBUSY for inject poison limit reached via debugfs and cxl-test support - Moving the PCI config read in cxl_dvsec_rr_decode() to avoid unnecessary PCI config reads - A refactor to a common struct for DRAM and general media CXL events" * tag 'cxl-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: cxl/core/pci: Move reading of control register to immediately before usage cxl: Remove defunct code calculating host bridge target positions cxl/region: Verify target positions using the ordered target list cxl: Restore XOR'd position bits during address translation cxl/core: Fold cxl_trace_hpa() into cxl_dpa_to_hpa() cxl/test: Replace ENXIO with EBUSY for inject poison limit reached cxl/memdev: Replace ENXIO with EBUSY for inject poison limit reached cxl/acpi: Warn on mixed CXL VH and RCH/RCD Hierarchy cxl/core: Fix incorrect vendor debug UUID define Documentation: CXL Maturity Map cxl/region: Simplify cxl_region_nid() cxl/region: Support to calculate memory tier abstract distance cxl/region: Fix a race condition in memory hotplug notifier cxl: add missing MODULE_DESCRIPTION() macros cxl/events: Use a common struct for DRAM and General Media events
| * cxl/memdev: Replace ENXIO with EBUSY for inject poison limit reachedAlison Schofield2024-07-111-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CXL driver provides a debugfs interface offering users the ability to inject and clear poison to a memdev. Once a user has injected up to the devices limit further injection requests fail with ENXIO until a clear poison is issued. Users may not have device specs in hand or may want to intentionally hit the limit and then clear. Replace the usual ENXIO return status with EBUSY so users can recognize this failure. Signed-off-by: Alison Schofield <alison.schofield@intel.com> Tested-by: Xingtao Yao <yaoxt.fnst@fujitsu.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Link: https://patch.msgid.link/825bd4c67fb55a4373c4182d999ad49d4e6b4fe7.1720316188.git.alison.schofield@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
| * Documentation: CXL Maturity MapDan Williams2024-07-092-0/+204
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide a survey of the work-in-progress maturity (implementation status) of various aspects of the CXL subsystem. Clarify that in addition to ongoing upkeep relative to specification updates, there are some long running themes in the driver that respond to the discovery of new corner cases (bugs) and new use cases (feature extensions). The primary audience is distribution maintainers, but it also serves as a guide for kernel developers to understand what aspects of the CXL subsystem need more help. It is a landing page to document ongoing progress, and a guide to discern exposure to work-in-progress features. Reviewed-by: Adam Manzanares <a.manzanares@samsung.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Link: https://patch.msgid.link/172005486862.2048248.6668794717827294862.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
* | Merge tag 'rust-6.11' of https://github.com/Rust-for-Linux/linuxLinus Torvalds2024-07-274-54/+111
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull Rust updates from Miguel Ojeda: "The highlight is the establishment of a minimum version for the Rust toolchain, including 'rustc' (and bundled tools) and 'bindgen'. The initial minimum will be the pinned version we currently have, i.e. we are just widening the allowed versions. That covers three stable Rust releases: 1.78.0, 1.79.0, 1.80.0 (getting released tomorrow), plus beta, plus nightly. This should already be enough for kernel developers in distributions that provide recent Rust compiler versions routinely, such as Arch Linux, Debian Unstable (outside the freeze period), Fedora Linux, Gentoo Linux (especially the testing channel), Nix (unstable) and openSUSE Slowroll and Tumbleweed. In addition, the kernel is now being built-tested by Rust's pre-merge CI. That is, every change that is attempting to land into the Rust compiler is tested against the kernel, and it is merged only if it passes. Similarly, the bindgen tool has agreed to build the kernel in their CI too. Thus, with the pre-merge CI in place, both projects hope to avoid unintentional changes to Rust that break the kernel. This means that, in general, apart from intentional changes on their side (that we will need to workaround conditionally on our side), the upcoming Rust compiler versions should generally work. In addition, the Rust project has proposed getting the kernel into stable Rust (at least solving the main blockers) as one of its three flagship goals for 2024H2 [1]. I would like to thank Niko, Sid, Emilio et al. for their help promoting the collaboration between Rust and the kernel. Toolchain and infrastructure: - Support several Rust toolchain versions. - Support several bindgen versions. - Remove 'cargo' requirement and simplify 'rusttest', thanks to 'alloc' having been dropped last cycle. - Provide proper error reporting for the 'rust-analyzer' target. 'kernel' crate: - Add 'uaccess' module with a safe userspace pointers abstraction. - Add 'page' module with a 'struct page' abstraction. - Support more complex generics in workqueue's 'impl_has_work!' macro. 'macros' crate: - Add 'firmware' field support to the 'module!' macro. - Improve 'module!' macro documentation. Documentation: - Provide instructions on what packages should be installed to build the kernel in some popular Linux distributions. - Introduce the new kernel.org LLVM+Rust toolchains. - Explain '#[no_std]'. And a few other small bits" Link: https://rust-lang.github.io/rust-project-goals/2024h2/index.html#flagship-goals [1] * tag 'rust-6.11' of https://github.com/Rust-for-Linux/linux: (26 commits) docs: rust: quick-start: add section on Linux distributions rust: warn about `bindgen` versions 0.66.0 and 0.66.1 rust: start supporting several `bindgen` versions rust: work around `bindgen` 0.69.0 issue rust: avoid assuming a particular `bindgen` build rust: start supporting several compiler versions rust: simplify Clippy warning flags set rust: relax most deny-level lints to warnings rust: allow `dead_code` for never constructed bindings rust: init: simplify from `map_err` to `inspect_err` rust: macros: indent list item in `paste!`'s docs rust: add abstraction for `struct page` rust: uaccess: add typed accessors for userspace pointers uaccess: always export _copy_[from|to]_user with CONFIG_RUST rust: uaccess: add userspace pointers kbuild: rust-analyzer: improve comment documentation kbuild: rust-analyzer: better error handling docs: rust: no_std is used rust: alloc: add __GFP_HIGHMEM flag rust: alloc: fix typo in docs for GFP_NOWAIT ...
| * | docs: rust: quick-start: add section on Linux distributionsMiguel Ojeda2024-07-102-17/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we are starting to support several Rust compiler and `bindgen` versions, there is a good chance some Linux distributions work out of the box. Thus, provide some instructions on how to set the toolchain up for a few major Linux distributions. This simplifies the setup users need to build the kernel. In addition, add an introduction to the document so that it is easier to understand its structure and move the LLVM+Rust kernel.org toolchains paragraph there (removing "depending on the Linux version"). We may want to reorganize the document or split it in the future, but I wanted to focus this commit on the new information added about each particular distribution. Finally, remove the `rustup`'s components mention in `changes.rst` since users do not need it if they install the toolchain via the distributions (and anyway it was too detailed for that main document). Cc: Jan Alexander Steffens <heftig@archlinux.org> Cc: Johannes Löthberg <johannes@kyriasis.com> Cc: Fabian Grünbichler <debian@fabian.gruenbichler.email> Cc: Josh Stone <jistone@redhat.com> Cc: Randy Barlow <randy@electronsweatshop.com> Cc: Anna (navi) Figueiredo Gomes <navi@vlhl.dev> Cc: Matoro Mahri <matoro_gentoo@matoro.tk> Cc: Ryan Scheel <ryan.havvy@gmail.com> Cc: figsoda <figsoda@pm.me> Cc: Jörg Thalheim <joerg@thalheim.io> Cc: Theodore Ni <43ngvg@masqt.com> Cc: Winter <nixos@winter.cafe> Cc: William Brown <wbrown@suse.de> Cc: Xiaoguang Wang <xiaoguang.wang@suse.com> Cc: Andrea Righi <andrea.righi@canonical.com> Cc: Zixing Liu <zixing.liu@canonical.com> Cc: Nathan Chancellor <nathan@kernel.org> Tested-by: Benno Lossin <benno.lossin@proton.me> Tested-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20240709160615.998336-14-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | rust: start supporting several `bindgen` versionsMiguel Ojeda2024-07-101-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With both the workaround for `bindgen` 0.69.0 and the warning about 0.66.0 and 0.66.1 in place, start supporting several `bindgen` versions, like it was done for the Rust compiler in a previous patch. All other versions, including the latest 0.69.4, build without errors. The `bindgen` project, like Rust, has also agreed to have the kernel in their CI [1] -- thanks! This should help both projects: `bindgen` will be able to detect early issues like those mentioned above, and the kernel will be very likely build with new releases (at least for the basic configuration being tested). Link: https://github.com/rust-lang/rust-bindgen/pull/2851 [1] Tested-by: Benno Lossin <benno.lossin@proton.me> Tested-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20240709160615.998336-10-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | rust: avoid assuming a particular `bindgen` buildMiguel Ojeda2024-07-101-14/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | `bindgen`'s logic to find `libclang` (via `clang-sys`) may change over time, and depends on how it was built (e.g. Linux distributions may decide to build it differently, and we are going to provide documentation on installing it via distributions later in this series). Therefore, clarify that `bindgen` may be built in several ways and simplify the documentation by only mentioning the most prominent environment variable (`LIBCLANG_PATH`) as an example on how to tweak the search of the library at runtime (i.e. when `bindgen` is built as our documentation explains). This also avoids duplicating the documentation, like `bindgen` itself does (i.e. it refers to `clang-sys`). Similarly, replace the test we had for this (which used the real program) with a mocked one, to avoid depending on the particular build as well. Tested-by: Benno Lossin <benno.lossin@proton.me> Tested-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20240709160615.998336-8-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | rust: start supporting several compiler versionsMiguel Ojeda2024-07-102-11/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is time to start supporting several Rust compiler versions and thus establish a minimum Rust version. We may still want to upgrade the minimum sometimes in the beginning since there may be important features coming into the language that improve how we write code (e.g. field projections), which may or may not make sense to support conditionally. We will start with a window of two stable releases, and widen it over time. Thus this patch does not move the current minimum (1.78.0), but instead adds support for the recently released 1.79.0. This should already be enough for kernel developers in distributions that provide recent Rust compiler versions routinely, such as Arch Linux, Debian Unstable (outside the freeze period), Fedora Linux, Gentoo Linux (especially the testing channel), Nix (unstable) and openSUSE Tumbleweed. See the documentation patch about it later in this series. In addition, Rust for Linux is now being built-tested in Rust's pre-merge CI [1]. That is, every change that is attempting to land into the Rust compiler is tested against the kernel, and it is merged only if it passes -- thanks to the Rust project for that! Thus, with the pre-merge CI in place, both projects hope to avoid unintentional changes to Rust that break the kernel. This means that, in general, apart from intentional changes on their side (that we will need to workaround conditionally on our side), the upcoming Rust compiler versions should generally work. For instance, currently, the beta (1.80.0) and nightly (1.81.0) branches work as well. Of course, the Rust for Linux CI job in the Rust toolchain may still need to be temporarily disabled for different reasons, but the intention is to help bring Rust for Linux into stable Rust. Link: https://github.com/rust-lang/rust/pull/125209 [1] Reviewed-by: Finn Behrens <me@kloenk.dev> Tested-by: Benno Lossin <benno.lossin@proton.me> Tested-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20240709160615.998336-7-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | docs: rust: no_std is usedDirk Behme2024-07-081-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using the #![no_std] attribute in the Rust kernel support is different to the default Rust usage. Mention this in the Documentation. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Reviewed-by: Trevor Gross <tmgross@umich.edu> Link: https://lore.kernel.org/r/20240610122332.3858571-1-dirk.behme@de.bosch.com [ Avoided breaking links in two lines. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | kbuild: rust: remove now-unneeded `rusttest` custom sysroot handlingMiguel Ojeda2024-07-082-17/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we dropped our custom `alloc` in commit 9d0441bab775 ("rust: alloc: remove our fork of the `alloc` crate"), there is no need anymore to keep the custom sysroot hack. Thus delete it, which makes the target way simpler and faster too. This also means we are not using Cargo for anything at the moment, and that no download is required anymore, so update the main `Makefile` and the documentation accordingly. Link: https://lore.kernel.org/r/20240528163502.411600-1-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
| * | docs: rust: introduce the new kernel.org LLVM+Rust toolchainsNathan Chancellor2024-07-081-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These combined LLVM+Rust toolchains are now available, thanks to Nathan Chancellor (ClangBuiltLinux). Thus introduce them in the Rust Quick Start guide. Signed-off-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/r/20240517170615.377786-1-ojeda@kernel.org Co-developed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
* | | Merge tag 'devicetree-fixes-for-6.11-1' of ↵Linus Torvalds2024-07-272-3/+3
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull more devicetree updates from Rob Herring: "Most of this is a treewide change to of_property_for_each_u32() which was small enough to do in one go before rc1 and avoids the need to create of_property_for_each_u32_some_new_name(). - Treewide conversion of of_property_for_each_u32() to drop internal arguments making struct property opaque - Add binding for Amlogic A4 SoC watchdog - Fix constraints for AD7192 'single-channel' property" * tag 'devicetree-fixes-for-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: dt-bindings: iio: adc: ad7192: Fix 'single-channel' constraints of: remove internal arguments from of_property_for_each_u32() dt-bindings: watchdog: add support for Amlogic A4 SoCs
| * | | dt-bindings: iio: adc: ad7192: Fix 'single-channel' constraintsRob Herring (Arm)2024-07-261-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'single-channel' property is an uint32, not an array, so 'items' is an incorrect constraint. This didn't matter until dtschema recently changed how properties are decoded. This results in this warning: Documentation/devicetree/bindings/iio/adc/adi,ad7192.example.dtb: adc@0: \ channel@1:single-channel: 1 is not of type 'array' Fixes: caf7b7632b8d ("dt-bindings: iio: adc: ad7192: Add AD7194 support") Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240723230904.1299744-1-robh@kernel.org Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
| * | | dt-bindings: watchdog: add support for Amlogic A4 SoCsHuqiang Qin2024-07-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update dt-binding document for watchdog of Amlogic A4 SoCs. Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com> Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20240709-a4-a5_watchdog-v1-1-2ae852e05ec2@amlogic.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
* | | | Merge tag 'spi-fix-v6.11-merge-window' of ↵Linus Torvalds2024-07-271-1/+3
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi fixes from Mark Brown: "The bulk of this is a series of fixes for the microchip-core driver mostly originating from one of their customers, I also applied an additional patch adding support for controlling the word size which came along with it since it's still the merge window and clearly had a bunch of fairly thorough testing. We also have a fix for the compatible used to bind spidev to the BH2228FV" * tag 'spi-fix-v6.11-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: spidev: add correct compatible for Rohm BH2228FV dt-bindings: trivial-devices: fix Rohm BH2228FV compatible string spi: microchip-core: add support for word sizes of 1 to 32 bits spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer spi: microchip-core: fix init function not setting the master and motorola modes spi: microchip-core: only disable SPI controller when register value change requires it spi: microchip-core: defer asserting chip select until just before write to TX FIFO spi: microchip-core: fix the issues in the isr
| * | | | dt-bindings: trivial-devices: fix Rohm BH2228FV compatible stringConor Dooley2024-07-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When Maxime originally added the BH2228FV to the spidev driver, he spelt it incorrectly - the d should have been a b. That spelling was then propagated to the binding when written by Krzysztof. Add a new, correctly spelt compatible and advise against using the incorrectly spelling. Fixes: 025aea27732d ("dt-bindings: trivial-devices: document SPI dev compatibles") Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Acked-by: Maxime Ripard <mripard@kernel.org> Link: https://patch.msgid.link/20240717-exuberant-enlighten-f890fabcd247@spud Signed-off-by: Mark Brown <broonie@kernel.org>
* | | | | Merge tag 'i3c/for-6.11' of ↵Linus Torvalds2024-07-272-2/+14
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull i3c updates from Alexandre Belloni: "This cycle, there are new features for the Designware controller and fixes for the other IPs: - dw: optional apb clock and power management support, IBI handling fixes - mipi-i3c-hci: IBI handling fixes - svc: a few fixes" * tag 'i3c/for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: dt-bindings: i3c: add header for generic I3C flags i3c: master: svc: Fix error code in svc_i3c_master_do_daa_locked() i3c: master: Enhance i3c_bus_type visibility for device searching & event monitoring i3c: dw: Add power management support i3c: dw: Add some functions for reusability i3c: dw: Save timing registers and other values i3c: master: svc: Improve DAA STOP handle code logic i3c: dw: Add optional apb clock i3c: dw: Use new *_enabled clk API dt-bindings: i3c: dw: Add apb clock binding i3c: master: svc: Convert comma to semicolon i3c: mipi-i3c-hci: Round IBI data chunk size to HW supported value i3c: mipi-i3c-hci: Error out instead on BUG_ON() in IBI DMA setup i3c: mipi-i3c-hci: Set IBI Status and Data Ring base addresses i3c: mipi-i3c-hci: Switch to lower_32_bits()/upper_32_bits() helpers i3c: dw: Remove ibi_capable property i3c: dw: Fix IBI intr programming i3c: dw: Fix clearing queue thld i3c: mipi-i3c-hci: Fix number of DAT/DCT entries for HCI versions < 1.1 i3c: master: svc: resend target address when get NACK
| * | | | | dt-bindings: i3c: add header for generic I3C flagsCarlos Song2024-07-261-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add header file for generic I3C flags to avoid hard code in dts file. Signed-off-by: Carlos Song <carlos.song@nxp.com> Reviewed-by: Frank Li <frank.li@nxp.com> Acked-by: Jason Liu <jason.hui.liu@nxp.com> Signed-off-by: Frank Li <Frank.Li@nxp.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240715225351.3237284-1-Frank.Li@nxp.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| * | | | | dt-bindings: i3c: dw: Add apb clock bindingAniket2024-07-261-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add dt binding for optional apb clock. Core clock is mandatory. Signed-off-by: Aniket <aniketmaurya@google.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240628154526.324068-1-aniketmaurya@google.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
* | | | | | Merge tag 'mm-hotfixes-stable-2024-07-26-14-33' of ↵Linus Torvalds2024-07-272-2/+2
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc hotfixes from Andrew Morton: "11 hotfixes, 7 of which are cc:stable. 7 are MM, 4 are other" * tag 'mm-hotfixes-stable-2024-07-26-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: nilfs2: handle inconsistent state in nilfs_btnode_create_block() selftests/mm: skip test for non-LPA2 and non-LVA systems mm/page_alloc: fix pcp->count race between drain_pages_zone() vs __rmqueue_pcplist() mm: memcg: add cacheline padding after lruvec in mem_cgroup_per_node alloc_tag: outline and export free_reserved_page() decompress_bunzip2: fix rare decompression failure mm/huge_memory: avoid PMD-size page cache if needed mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines mm: fix old/young bit handling in the faulting path dt-bindings: arm: update James Clark's email address MAINTAINERS: mailmap: update James Clark's email address
| * | | | | | dt-bindings: arm: update James Clark's email addressJames Clark2024-07-262-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | My new address is james.clark@linaro.org Link: https://lkml.kernel.org/r/20240709102512.31212-3-james.clark@linaro.org Signed-off-by: James Clark <james.clark@linaro.org> Cc: Bjorn Andersson <quic_bjorande@quicinc.com> Cc: Conor Dooley <conor+dt@kernel.org> Cc: David S. Miller <davem@davemloft.net> Cc: Geliang Tang <geliang@kernel.org> Cc: Hao Zhang <quic_hazha@quicinc.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Jiri Kosina <jikos@kernel.org> Cc: Kees Cook <kees@kernel.org> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org> Cc: Mao Jinlong <quic_jinlmao@quicinc.com> Cc: Matthieu Baerts <matttbe@kernel.org> Cc: Matt Ranostay <matt@ranostay.sg> Cc: Mike Leach <mike.leach@linaro.org> Cc: Oleksij Rempel <o.rempel@pengutronix.de> Cc: Rob Herring (Arm) <robh@kernel.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | | | | | | Merge tag 'riscv-for-linus-6.11-mw2' of ↵Linus Torvalds2024-07-272-5/+8
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull more RISC-V updates from Palmer Dabbelt: - Support for NUMA (via SRAT and SLIT), console output (via SPCR), and cache info (via PPTT) on ACPI-based systems. - The trap entry/exit code no longer breaks the return address stack predictor on many systems, which results in an improvement to trap latency. - Support for HAVE_ARCH_STACKLEAK. - The sv39 linear map has been extended to support 128GiB mappings. - The frequency of the mtime CSR is now visible via hwprobe. * tag 'riscv-for-linus-6.11-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (21 commits) RISC-V: Provide the frequency of time CSR via hwprobe riscv: Extend sv39 linear mapping max size to 128G riscv: enable HAVE_ARCH_STACKLEAK riscv: signal: Remove unlikely() from WARN_ON() condition riscv: Improve exception and system call latency RISC-V: Select ACPI PPTT drivers riscv: cacheinfo: initialize cacheinfo's level and type from ACPI PPTT riscv: cacheinfo: remove the useless input parameter (node) of ci_leaf_init() RISC-V: ACPI: Enable SPCR table for console output on RISC-V riscv: boot: remove duplicated targets line trace: riscv: Remove deprecated kprobe on ftrace support riscv: cpufeature: Extract common elements from extension checking riscv: Introduce vendor variants of extension helpers riscv: Add vendor extensions to /proc/cpuinfo riscv: Extend cpufeature.c to detect vendor extensions RISC-V: run savedefconfig for defconfig RISC-V: hwprobe: sort EXT_KEY()s in hwprobe_isa_ext0() alphabetically ACPI: NUMA: replace pr_info with pr_debug in arch_acpi_numa_init ACPI: NUMA: change the ACPI_NUMA to a hidden option ACPI: NUMA: Add handler for SRAT RINTC affinity structure ...
| * | | | | | | RISC-V: Provide the frequency of time CSR via hwprobePalmer Dabbelt2024-07-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RISC-V architecture makes a real time counter CSR (via RDTIME instruction) available for applications in U-mode but there is no architected mechanism for an application to discover the frequency the counter is running at. Some applications (e.g., DPDK) use the time counter for basic performance analysis as well as fine grained time-keeping. Add support to the hwprobe system call to export the time CSR frequency to code running in U-mode. Signed-off-by: Yunhui Cui <cuiyunhui@bytedance.com> Reviewed-by: Evan Green <evan@rivosinc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Acked-by: Punit Agrawal <punit.agrawal@bytedance.com> Link: https://lore.kernel.org/r/20240702033731.71955-2-cuiyunhui@bytedance.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-22 09:03:32 +0100