Changes in Makefile

4e6d24a3 - openrisc: Add cacheinfo support

Sat, 19 Apr 2025 15:48:19 +0000

openrisc: Add cacheinfo supportAdd cacheinfo support for OpenRISC.Currently, a few CPU cache attributes pertaining to OpenRISC processorsare exposed along with other unrelated CPU attributes in the procfs filesystem (/proc/cpuinfo). However, a few cache attributes remain unexposed.Provide a mechanism that the generic cacheinfo infrastructure can employto expose these attributes via the sysfs file system. These attributescan then be exposed in /sys/devices/system/cpu/cpuX/cache/indexN. Movethe implementation to pull cache attributes from the processor'sregisters from arch/openrisc/kernel/setup.c with a few modifications.This implementation is based on similar work done for MIPS and LoongArch.Link: https://raw.githubusercontent.com/openrisc/doc/master/openrisc-arch-1.4-rev0.pdfSigned-off-by: Sahil Siddiq Signed-off-by: Stafford Horne List of files: /linux-6.15/arch/openrisc/kernel/Makefile

32164845 - kbuild: use obj-y instead extra-y for objects placed at the head

Sat, 24 Sep 2022 18:19:14 +0000

kbuild: use obj-y instead extra-y for objects placed at the headThe objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a.This commit gets rid of the latter.Create vmlinux.a to collect all the objects that are unconditionallylinked to vmlinux. The objects listed in head-y are moved to the headof vmlinux.a by using 'ar m'.With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-yfor builtin objects.There is no *.o that is directly linked to vmlinux. Drop unneeded codein scripts/clang-tools/gen_compile_commands.py.$(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggestedby Nathan Chancellor [1].[1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/Signed-off-by: Masahiro Yamada Tested-by: Nick Desaulniers Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/openrisc/kernel/Makefile

4553474d - openrisc: add tick timer multi-core sync logic

Thu, 06 Jul 2017 21:06:30 +0000

openrisc: add tick timer multi-core sync logicIn case timers are not in sync when cpus start (i.e. hot plug / offsetresets) we need to synchronize the secondary cpus internal timer withthe main cpu. This is needed as in OpenRISC SMP there is only oneclocksource registered which reads from the same ttcr register on eachcpu.This synchronization routine heavily borrows from mips implementation thatdoes something similar.Signed-off-by: Stafford Horne List of files: /linux-6.15/arch/openrisc/kernel/Makefile

eecac38b - openrisc: support framepointers and STACKTRACE_SUPPORT

Mon, 24 Jul 2017 12:44:35 +0000

openrisc: support framepointers and STACKTRACE_SUPPORTFor lockdep support a reliable stack trace mechanism is needed. Thispatch adds support in OpenRISC for the stacktrace framework, implementedby a simple unwinder api. The unwinder api supports both framepointerand basic stack tracing.The unwinder is now used to replace the stack_dump() implementation aswell. The new traces are inline with other architectures trace format: Call trace: [] show_stack+0x3c/0x58 [] dump_stack+0xa8/0xe4 [] __cpu_up+0x64/0x130 [] bringup_cpu+0x3c/0x178 [] cpuhp_invoke_callback+0xa8/0x1fc [] cpuhp_up_callbacks+0x44/0x14c [] cpu_up+0x14c/0x1bc [] smp_init+0x104/0x15c [] ? kernel_init+0x0/0x140 [] kernel_init_freeable+0xbc/0x25c [] ? kernel_init+0x0/0x140 [] kernel_init+0x1c/0x140 [] ? schedule_tail+0x18/0xa0 [] ret_from_fork+0x1c/0x9cSigned-off-by: Stafford Horne List of files: /linux-6.15/arch/openrisc/kernel/Makefile

8e6d08e0 - openrisc: initial SMP support

Sun, 11 May 2014 18:49:34 +0000

openrisc: initial SMP supportThis patch introduces the SMP support for the OpenRISC architecture.The SMP architecture requires cores which have multi-core features whichhave been introduced a few years back including: - New SPRS SPR_COREID SPR_NUMCORES - Shadow SPRs - Atomic Instructions - Cache Coherency - A wired in IPI controllerThis patch adds all of the SMP specific changes to core infrastructure,it looks big but it needs to go all together as its hard to split thisone up.Boot loader spinning of second cpu is not supported yet, it's assumedthat Linux is booted straight after cpu reset.The bulk of these changes are trivial changes to refactor to use per cpudata structures throughout. The addition of the smp.c and changes intime.c are the changes. Some specific notes:MM changes----------The reason why this is created as an array, and not with DEFINE_PER_CPUis that doing it this way, we'll save a load in the tlb-miss handler(the load from __per_cpu_offset).TLB Flush---------The SMP implementation of flush_tlb_* works by sending out afunction-call IPI to all the non-local cpus by using the genericon_each_cpu() function.Currently, all flush_tlb_* functions will result in a flush_tlb_all(),which has always been the behaviour in the UP case.CPU INFO--------This creates a per cpu cpuinfo struct and fills it out accordingly foreach activated cpu. show_cpuinfo is also updated to reflect new versioninformation in later versions of the spec.SMP API-------This imitates the arm64 implementation by having a smp_cross_callcallback that can be set by set_smp_cross_call to initiate an IPI and ahandle_IPI function that is expected to be called from an IPI irqchipdriver.Signed-off-by: Stefan Kristiansson [shorne@gmail.com: added cpu stop, checkpatch fixes, wrote commit message]Signed-off-by: Stafford Horne List of files: /linux-6.15/arch/openrisc/kernel/Makefile

b2441318 - License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Wed, 01 Nov 2017 14:07:57 +0000

License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseMany source files in the tree are missing licensing information, whichmakes it harder for compliance tools to determine the correct license.By default all files without license information are under the defaultlicense 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 bindingshorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart andPhilippe Ombredanne.How this work was done:Patches were generated and checked against linux-4.14-rc6 for a subset ofthe 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 caseswhere non-standard license headers were used, and references to licensehad to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied toa file was done in a spreadsheet of side by side results from of theoutput of two independent scanners (ScanCode & Windriver) producing SPDXtag:value files created by Philippe Ombredanne. Philippe prepared thebase 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 filesassessed. Kate Stewart did a file by file comparison of the scannerresults in the spreadsheet to determine which SPDX license identifier(s)to be applied to the file. She confirmed any determination that was notimmediately 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 licenseidentifiers 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 thespreadsheet to determine the SPDX license identifiers to apply to thesource files by Kate, Philippe, Thomas and, in some cases, confirmationby lawyers working with the Linux Foundation.Kate also obtained a third independent scan of the 4.13 code base fromFOSSology, and compared selected files where the other two scannersdisagreed against that SPDX file, to see if there was new insights. TheWindriver scanner is based on an older version of FOSSology in part, sothey are related.Thomas did random spot checks in about 500 files from the spreadsheetsfor the uapi headers and agreed with SPDX license identifier in thefiles he inspected. For the non-uapi files Thomas did random spot checksin about 15000 files.In initial set of patches against 4.14-rc6, 3 files were found to havecopy/paste license identifier errors, and have been fixed to reflect thecorrect identifier.Additionally Philippe spent 10 hours this week doing a detailed manualinspection and review of the 12,461 patched files from the initial patchversion 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 correctThis produced a worksheet with 20 files needing minor correction. Thisworksheet was then exported into 3 different .csv files for thedifferent types of files to be modified.These .csv files were then reviewed by Greg. Thomas wrote a script toparse the csv files and add the proper SPDX tag to the file, in theformat that the file expected. This script was further refined by Gregbased on the output to detect more types of files automatically and todistinguish between header and source .c files (which need differentcomment types.) Finally Greg ran the script using the .csv files togenerate the patches.Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/arch/openrisc/kernel/Makefile

6862c05c - openrisc: Use generic idle loop

Thu, 21 Mar 2013 21:49:54 +0000

openrisc: Use generic idle loopIdle poller with an extra check_pgt_cache() invocation. Use the corecode.Signed-off-by: Thomas Gleixner Cc: Linus Torvalds Cc: Rusty Russell Cc: Paul McKenney Cc: Peter Zijlstra Reviewed-by: Cc: Srivatsa S. Bhat Cc: Magnus Damm Link: http://lkml.kernel.org/r/20130321215234.886530981@linutronix.deSigned-off-by: Thomas Gleixner List of files: /linux-6.15/arch/openrisc/kernel/Makefile

39d91a9e - openrisc: switch to use of generic fork and clone

Fri, 26 Oct 2012 23:37:49 +0000

openrisc: switch to use of generic fork and cloneSigned-off-by: Al Viro List of files: /linux-6.15/arch/openrisc/kernel/Makefile

cf5e6def - openrisc: Use generic init_task

Thu, 03 May 2012 09:02:56 +0000

openrisc: Use generic init_taskSame code. Use the generic version. The special Makefile treatment ispointless anyway as init_task.o contains only data which is handled bythe linker script. So no point on being treated like head text.Signed-off-by: Thomas Gleixner Cc: Jonas Bonn Link: http://lkml.kernel.org/r/20120503085035.083343435@linutronix.de List of files: /linux-6.15/arch/openrisc/kernel/Makefile

f8c4a270 - OpenRISC: Build infrastructure

Sat, 04 Jun 2011 18:52:05 +0000

OpenRISC: Build infrastructureSigned-off-by: Jonas Bonn Reviewed-by: Arnd Bergmann List of files: /linux-6.15/arch/openrisc/kernel/Makefile