Changes in idmap.h

33def849 - treewide: Convert macro and uses of section(foo) to section("foo")

Thu, 22 Oct 2020 02:36:07 +0000

treewide: Convert macro and uses of __section(foo) to __section("foo")Use a more generic form for __section that requires quotes to avoidcomplications with clang and gcc differences.Remove the quote operator # from compiler_attributes.h __section macro.Convert all unquoted __section(foo) uses to quoted __section("foo").Also convert __attribute__((section("foo"))) uses to __section("foo")even if the __attribute__ has multiple list entry forms.Conversion done using the script at: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.plSigned-off-by: Joe Perches Reviewed-by: Nick Desaulniers Reviewed-by: Miguel Ojeda Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm/include/asm/idmap.h

ca5999fd - mm: introduce include/linux/pgtable.h

Tue, 09 Jun 2020 04:32:38 +0000

mm: introduce include/linux/pgtable.hThe include/linux/pgtable.h is going to be the home of generic page tablemanipulation functions.Start with moving asm-generic/pgtable.h to include/linux/pgtable.h andmake the latter include asm/pgtable.h.Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/arch/arm/include/asm/idmap.h

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/arm/include/asm/idmap.h

2fb41059 - ARM: KVM: move to a KVM provided HYP idmap

Fri, 12 Apr 2013 18:12:03 +0000

ARM: KVM: move to a KVM provided HYP idmapAfter the HYP page table rework, it is pretty easy to let the KVMcode provide its own idmap, rather than expecting the kernel toprovide it. It takes actually less code to do so.Acked-by: Will Deacon Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall List of files: /linux-6.15/arch/arm/include/asm/idmap.h

9e9a367c - ARM: Section based HYP idmap

Sun, 20 Jan 2013 23:43:10 +0000

ARM: Section based HYP idmapAdd a method (hyp_idmap_setup) to populate a hyp pgd with anidentity mapping of the code contained in the .hyp.idmap.textsection.Offer a method to drop this identity mapping throughhyp_idmap_teardown.Make all the above depend on CONFIG_ARM_VIRT_EXT and CONFIG_ARM_LPAE.Reviewed-by: Will Deacon Reviewed-by: Marcelo Tosatti Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall List of files: /linux-6.15/arch/arm/include/asm/idmap.h

4e8ee7de - ARM: SMP: use idmap_pgd for mapping MMU enable during secondary booting

Wed, 23 Nov 2011 12:26:25 +0000

ARM: SMP: use idmap_pgd for mapping MMU enable during secondary bootingThe ARM SMP booting code allocates a temporary set of page tablescontaining an identity mapping of the kernel image and provides thisto secondary CPUs for initial booting.In reality, we only need to include the __turn_mmu_on function in theidentity mapping since the rest of the kernel is executing from virtualaddresses after this point.This patch adds __turn_mmu_on to the .idmap.text section, allowing theSMP booting code to use the idmap_pgd directly and not have to populateits own set of page table.As a result of this patch, we can make the identity_mapping_add functionstatic (since it is only used within mm/idmap.c) and also remove theidentity_mapping_del function. The identity map population is moved toan early initcall so that it is setup in time for secondary CPU bringup.Reviewed-by: Catalin Marinas Signed-off-by: Will Deacon List of files: /linux-6.15/arch/arm/include/asm/idmap.h

8903826d - ARM: idmap: populate identity map pgd at init time using .init.text

Fri, 30 Sep 2011 10:43:29 +0000

ARM: idmap: populate identity map pgd at init time using .init.textWhen disabling and re-enabling the MMU, it is necessary to take out anidentity mapping for the code that manipulates the SCTLR in order toavoid it disappearing from under our feet. This is useful when softrebooting and returning from CPU suspend.This patch allocates a set of page tables during boot and populates themwith an identity mapping for the .idmap.text section. This means thatusers of the identity map do not need to manage their own pgd and caninstead annotate their functions with __idmap or, in the case of assemblycode, place them in the correct section.Acked-by: Dave Martin Reviewed-by: Catalin Marinas Tested-by: Lorenzo Pieralisi Signed-off-by: Will Deacon List of files: /linux-6.15/arch/arm/include/asm/idmap.h