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2023-03-24treewide: Trace IPIs sent via smp_send_reschedule()Valentin Schneider1-0/+2
To be able to trace invocations of smp_send_reschedule(), rename the arch-specific definitions of it to arch_smp_send_reschedule() and wrap it into an smp_send_reschedule() that contains a tracepoint. Changes to include the declaration of the tracepoint were driven by the following coccinelle script: @func_use@ @@ smp_send_reschedule(...); @include@ @@ #include <trace/events/ipi.h> @no_include depends on func_use && !include@ @@ #include <...> + + #include <trace/events/ipi.h> [csky bits] [riscv bits] Signed-off-by: Valentin Schneider <vschneid@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Guo Ren <guoren@kernel.org> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Link: https://lore.kernel.org/r/20230307143558.294354-6-vschneid@redhat.com
2020-05-16ARM: actions: Drop unneeded select of COMMON_CLKGeert Uytterhoeven1-1/+0
Support for Actions Semi SoCs depends on ARCH_MULTI_V7, and thus on ARCH_MULTIPLATFORM. As the latter selects COMMON_CLK, there is no need for ARCH_ACTIONS to select COMMON_CLK. Link: https://lore.kernel.org/r/20200505150722.1575-3-geert+renesas@glider.be Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Andreas Färber <afaerber@suse.de> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-5/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner1-0/+1
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-02ARM: actions: remove boot_lock and pen_releaseRussell King1-15/+0
The actions SMP implementation has several issues: 1. pen_release is only ever read and compared to -1, and is defined in arch/arm/kernel/smp.c to be -1. This test will always succeed. 2. we are already guaranteed to be single threaded while bringing up a CPU, so the spinlock makes no sense, remove it. 3. owl_secondary_startup() is not referenced nor defined, the prototype is redundant, remove it. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2017-11-17Merge tag 'armsoc-soc' of ↵Linus Torvalds3-56/+2
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform updates from Arnd Bergmann: "Most of the commits are for defconfig changes, to enable newly added drivers or features that people have started using. For the changed lines lines, we have mostly cleanups, the affected platforms are OMAP, Versatile, EP93xx, Samsung, Broadcom, i.MX, and Actions. The largest single change is the introduction of the TI "sysc" bus driver, with the intention of cleaning up more legacy code. Two new SoC platforms get added this time: - Allwinner R40 is a modernized version of the A20 chip, now with a Quad-Core ARM Cortex-A7. According to the manufacturer, it is intended for "Smart Hardware" - Broadcom Hurricane 2 (Aka Strataconnect BCM5334X) is a family of chips meant for managed gigabit ethernet switches, based around a Cortex-A9 CPU. Finally, we gain SMP support for two platforms: Renesas R-Car E2 and Amlogic Meson8/8b, which were previously added but only supported uniprocessor operation" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (118 commits) ARM: multi_v7_defconfig: Select RPMSG_VIRTIO as module ARM: multi_v7_defconfig: enable CONFIG_GPIO_UNIPHIER arm64: defconfig: enable CONFIG_GPIO_UNIPHIER ARM: meson: enable MESON_IRQ_GPIO in Kconfig for meson8b ARM: meson: Add SMP bringup code for Meson8 and Meson8b ARM: smp_scu: allow the platform code to read the SCU CPU status ARM: smp_scu: add a helper for powering on a specific CPU dt-bindings: Amlogic: Add Meson8 and Meson8b SMP related documentation ARM: OMAP3: Delete an unnecessary variable initialisation in omap3xxx_hwmod_init() ARM: OMAP3: Use common error handling code in omap3xxx_hwmod_init() ARM: defconfig: select the right SX150X driver arm64: defconfig: Enable QCOM_IOMMU arm64: Add ThunderX drivers to defconfig arm64: defconfig: Enable Tegra PCI controller cpufreq: imx6q: Move speed grading check to cpufreq driver arm64: defconfig: re-enable Qualcomm DB410c USB ARM: configs: stm32: Add MDMA support in STM32 defconfig ARM: imx: Enable cpuidle for i.MX6DL starting at 1.1 bus: ti-sysc: Fix unbalanced pm_runtime_enable by adding remove bus: ti-sysc: mark PM functions as __maybe_unused ...
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-20ARM: owl: smp: Drop owl_secondary_boot()Andreas Färber3-56/+2
Commit 18cfd9429d8a82c49add8f3ca9d366599bfcac45 simplified the S500 SMP code by removing a loop for pen_release in owl_secondary_boot(). Since then it is only calling owl_v7_invalidate_l1() before branching to secondary_startup(). The owl_v7_invalidate_l1() assembler function is superfluous, too. Therefore drop owl_secondary_boot() and use secondary_boot() directly. Fixes: 18cfd9429d8a ("ARM: owl: smp: Drop bogus holding pen") Cc: David Liu <liuwei@actions-semi.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2017-09-20ARM: owl: smp: Use __pa_symbol()Andreas Färber1-1/+1
Replace an occurrence of virt_to_phys() with __pa_symbol() macro. See 64fc2a947a9873700929ec0ef02b4654a04e0476 ("ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol"). Fixes: 172067e0bc87 ("ARM: owl: Implement CPU enable-method for S500") Reported-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2017-07-03ARM: owl: smp: Drop bogus holding penAndreas Färber2-46/+3
The S500 SoC can start secondary CPUs without busy-looping for pen_release, so simplify the SMP code compared to the LeMaker kernel tree. Fixes: 172067e0bc87 ("ARM: owl: Implement CPU enable-method for S500") Suggested-by: Arnd Bergmann <arnd@arndb.de> Cc: David Liu <liuwei@actions-semi.com> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-07-03ARM: owl: Drop custom machineAndreas Färber2-29/+0
Rely on the fallback to "Generic DT based system". This change is visible in /proc/cpuinfo. Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-06-23ARM: owl: smp: Implement SPS power-gating for CPU2 and CPU3Andreas Färber2-2/+35
Bring up the two remaining CPUs by calling into PM domain code. Signed-off-by: Andreas Färber <afaerber@suse.de>
2017-06-21ARM: owl: Implement CPU enable-method for S500Andreas Färber3-0/+237
Allow to bring up CPU1. Based on LeMaker linux-actions tree. Signed-off-by: Andreas Färber <afaerber@suse.de>
2017-06-21ARM: Prepare Actions Semi S500Andreas Färber3-0/+44
Add ARCH_ACTIONS and mach-actions/owl.c for "actions,s500". Signed-off-by: Andreas Färber <afaerber@suse.de>