Changes in Makefile

390a2086 - parisc: Drop the pa7300lc LPMC handler

Sat, 12 Aug 2023 20:47:48 +0000

parisc: Drop the pa7300lc LPMC handlerThis was actually never really used, and the info itprints won't help. Drop it.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

f8a473bf - parisc: syscalls: Avoid compiler warnings with W=1

Mon, 03 Jul 2023 16:43:13 +0000

parisc: syscalls: Avoid compiler warnings with W=1We do not want to add prototypes for all parisc specific syscalls, sosimply drop such warnings when building the kernel.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/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/parisc/kernel/Makefile

62773112 - parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGY

Thu, 24 Mar 2022 18:46:50 +0000

parisc: Switch from GENERIC_CPU_DEVICES to GENERIC_ARCH_TOPOLOGYSwitch away from the own cpu topology code to common code which is usedby ARM64 and RISCV. That will allow us to enable CPU hotplug later on.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

df24e178 - parisc: Add vDSO support

Wed, 08 Dec 2021 10:06:52 +0000

parisc: Add vDSO supportAdd minimal vDSO support, which provides the signal trampoline helpers,but none of the userspace syscall helpers like time wrappers.The big benefit of this vDSO implementation is, that we now don't needan executeable stack any longer. PA-RISC is one of the lastarchitectures where an executeable stack was needed in oder to implementthe signal trampolines by putting assembly instructions on the stackwhich then gets executed. Instead the kernel will provide the relevantcode in the vDSO page and only put the pointers to the signalinformation on the stack.By dropping the need for executable stacks we avoid running into issueswith applications which want non executable stacks for security reasons.Additionally, alternative stacks on memory areas without execpermissions are supported too.This code is based on an initial implementation by Randolph Chung from 2006:https://lore.kernel.org/linux-parisc/4544A34A.6080700@tausq.org/I did the porting and lifted the code to current code base. Dave fixedthe unwind code so that gdb and glibc are able to backtrace through thecode. An additional patch to gdb will be pushed upstream by Dave.Signed-off-by: Helge Deller Signed-off-by: Dave Anglin Cc: Randolph Chung Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

d6ab9fc7 - parisc: Enable TOC (transfer of contents) feature unconditionally

Fri, 07 Jan 2022 13:05:11 +0000

parisc: Enable TOC (transfer of contents) feature unconditionallyBefore this patch, the TOC code used a pre-allocated stack of 16kb foreach possible CPU. That space overhead was the reason why the TOCfeature wasn't enabled by default for 32-bit kernels.This patch rewrites the TOC code to use a per-cpu stack. That way we usemuch less memory now and as such we enable the TOC feature by default onall kernels.Additionally the dump of the registers and the stacktrace wasn'tserialized, which led to multiple CPUs printing the stack backtrace atonce which rendered the output unreadable.Now the backtraces are nicely serialized by a lock.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

bc294838 - parisc: add support for TOC (transfer of control)

Thu, 14 Oct 2021 19:49:16 +0000

parisc: add support for TOC (transfer of control)Almost all PA-RISC machines have either a button thatis labeled with 'TOC' or a BMC function to trigger a TOC.TOC is a non-maskable interrupt that is sent to the processor.This can be used for diagnostic purposes like obtaining astack trace/register dump or to enter KDB/KGDB.As an example, on my c8000, TOC can be used with:CONFIG_KGDB=yCONFIG_KGDB_KDB=yand the 'kgdboc=ttyS0,115200' appended to the command line.Press ^[( on serial console, which will enter the BMC command line,and enter 'TOC s':root@(none):/# (cli>TOC sSending TOC/INIT. 2800035d03e00000 0000000040c21ac8 CC_ERR_CHECK_TOC 2800035d00e00000 0000000040c21ad0 CC_ERR_CHECK_TOC 2800035d02e00000 0000000040c21ac8 CC_ERR_CHECK_TOC 2800035d01e00000 0000000040c21ad0 CC_ERR_CHECK_TOC 37000f7303e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY 37000f7300e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY 37000f7302e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY 37000f7301e00000 2000000000000000 CC_ERR_CPU_CHECK_SUMMARY 4300100803e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC 4300100800e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC 4300100802e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOC 4300100801e00000 c0000000001d26cc CC_MC_BR_TO_OS_TOCEntering kdb (current=0x00000000411cef80, pid 0) on processor 0 due to NonMaskable Interrupt @ 0x40c21ad0[0]kdb>Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

e16260c2 - parisc: fix compilation when KEXEC=n and KEXEC_FILE=y

Sun, 15 Dec 2019 19:10:39 +0000

parisc: fix compilation when KEXEC=n and KEXEC_FILE=yFix compilation when the CONFIG_KEXEC_FILE=y andCONFIG_KEXEC=n.Reported-by: kbuild test robot Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

1191cf49 - parisc: add support for kexec_file_load() syscall

Sun, 08 Sep 2019 09:33:06 +0000

parisc: add support for kexec_file_load() syscallSigned-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

fc697dc0 - parisc: add kexec syscall support

Sun, 08 Sep 2019 09:33:04 +0000

parisc: add kexec syscall supportSigned-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

6ca63662 - parisc: add dynamic ftrace

Wed, 05 Jun 2019 20:32:22 +0000

parisc: add dynamic ftraceThis patch implements dynamic ftrace for PA-RISC. The required mcountcall sequences can get pretty long, so instead of patching thewhole call sequence out of the functions, we are using-fpatchable-function-entry from gcc. This puts a configurable amount ofNOPS before/at the start of the function. Taking do_sys_open() as example,which would look like this when the call is patched out:1036b248: 08 00 02 40 nop1036b24c: 08 00 02 40 nop1036b250: 08 00 02 40 nop1036b254: 08 00 02 40 nop1036b258 :1036b258: 08 00 02 40 nop1036b25c: 08 03 02 41 copy r3,r11036b260: 6b c2 3f d9 stw rp,-14(sp)1036b264: 08 1e 02 43 copy sp,r31036b268: 6f c1 01 00 stw,ma r1,80(sp)When ftrace gets enabled for this function the kernel will patch theseNOPs to:1036b248: 10 19 57 20

1036b24c: 6f c1 00 80 stw,ma r1,40(sp)1036b250: 48 21 3f d1 ldw -18(r1),r11036b254: e8 20 c0 02 bv,n r0(r1)1036b258 :1036b258: e8 3f 1f df b,l,n .-c,r11036b25c: 08 03 02 41 copy r3,r11036b260: 6b c2 3f d9 stw rp,-14(sp)1036b264: 08 1e 02 43 copy sp,r31036b268: 6f c1 01 00 stw,ma r1,80(sp)So the first NOP in do_sys_open() will be patched to jump backwards intosome minimal trampoline code which pushes a stackframe, saves r1 whichholds the return address, loads the address of the real ftrace function,and branches to that location. For 64 Bit things are getting a bit morecomplicated (and longer) because we must make sure that the address offtrace location is 8 byte aligned, and the offset passed to ldd forfetching the address is 8 byte aligned as well.Note that gcc has a bug which misplaces the function label, and needs apatch to make dynamic ftrace work. Seehttps://gcc.gnu.org/bugzilla/show_bug.cgi?id=90751 for details.Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

62217beb - parisc: Add static branch and JUMP_LABEL feature

Fri, 03 May 2019 21:51:00 +0000

parisc: Add static branch and JUMP_LABEL featureSigned-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

8858ac8e - parisc: Implement kprobes

Sun, 07 Apr 2019 18:10:58 +0000

parisc: Implement kprobesImplement kprobes support for PA-RISC.Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

eacbfce1 - parisc: add KGDB support

Thu, 04 Apr 2019 19:14:10 +0000

parisc: add KGDB supportThis patch add KGDB support to PA-RISC. It also implementssingle-stepping utilizing the recovery counter.Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

620a53d5 - parisc: add parisc code patching

Thu, 04 Apr 2019 19:14:09 +0000

parisc: add parisc code patchingInstead of re-mapping the whole kernel text with RWX rightsadd a patch_text() which can be used to replace instructionsin the kernel .text section. Based on the ARM implementation.Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

8cc28269 - parisc: Split out alternative live patching code

Sat, 10 Nov 2018 15:14:59 +0000

parisc: Split out alternative live patching codeMove the alternative implemenation coding to alternative.c and add code topatch modules while loading.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

c7cd8824 - parisc: Fix missing binfmt_elf32.o build error

Fri, 13 Apr 2018 19:54:37 +0000

parisc: Fix missing binfmt_elf32.o build errorCommit 71d577db01a5 ("parisc: Switch to generic COMPAT_BINFMT_ELF")removed the binfmt_elf32.c source file, but missed to drop the objectfile from the list of object files the Makefile, which then results in abuild error.Fixes: 71d577db01a5 ("parisc: Switch to generic COMPAT_BINFMT_ELF")Reported-by: Guenter Roeck Tested-by: Guenter Roeck Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile

bf7b4c1b - parisc: Add CPU topology support

Thu, 21 Sep 2017 19:55:01 +0000

parisc: Add CPU topology supportAdd topology support, including multi-core scheduler support onPA8800/PA8900 CPUs and enhanced output in /proc/cpuinfo, e.g.lscpu now reports on a single-socket, dual-core machine:Architecture: parisc64CPU(s): 2On-line CPU(s) list: 0,1Thread(s) per core: 1Core(s) per socket: 2Socket(s): 1CPU family: PA-RISC 2.0Model name: PA8800 (Mako)Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/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/parisc/kernel/Makefile

c9c2877d - parisc: Add Page Deallocation Table (PDT) support

Thu, 11 May 2017 20:24:15 +0000

parisc: Add Page Deallocation Table (PDT) supportThe firmare in most parisc machines maintains a Page Deallocation Table (PDT)which holds a list of physical memory addresses where hardware detected memoryerrors (single bit and double bit errors).This patch adds the missing PDC firmware calls and the logic to read the PDTfrom firmware, report all current PDT entries and exclude the reported badmemory from being used by Linux.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/Makefile