Eric Lee / smarc-fsl-linux-kernel

29 Jul, 2020

3 commits

  • 2e6bd221d   powerpc/kexec_file: Enable early kernel OPAL calls ... Browse Code »

    Kernels built with CONFIG_PPC_EARLY_DEBUG_OPAL enabled expects r8 & r9
    to be filled with OPAL base & entry addresses respectively. Setting
    these registers allows the kernel to perform OPAL calls before the
    device tree is parsed.

    Signed-off-by: Hari Bathini
    Reviewed-by: Thiago Jung Bauermann
    Signed-off-by: Michael Ellerman
    Link: https://lore.kernel.org/r/159602303975.575379.5032301944162937479.stgit@hbathini

    Hari Bathini
     
  • 1a1cf93c2   powerpc/kexec_file: Setup backup region for kdump kernel ... Browse Code »

    Though kdump kernel boots from loaded address, the first 64KB of it is
    copied down to real 0. So, setup a backup region and let purgatory
    copy the first 64KB of crashed kernel into this backup region before
    booting into kdump kernel. Update reserve map with backup region and
    crashed kernel's memory to avoid kdump kernel from accidentially using
    that memory.

    Signed-off-by: Hari Bathini
    Reviewed-by: Thiago Jung Bauermann
    Signed-off-by: Michael Ellerman
    Link: https://lore.kernel.org/r/159602294718.575379.16216507537038008623.stgit@hbathini

    Hari Bathini
     
  • 19031275a   powerpc/kexec_file: Mark PPC64 specific code ... Browse Code »

    Some of the kexec_file_load code isn't PPC64 specific. Move PPC64
    specific code from kexec/file_load.c to kexec/file_load_64.c. Also,
    rename purgatory/trampoline.S to purgatory/trampoline_64.S in the same
    spirit. No functional changes.

    Signed-off-by: Hari Bathini
    Tested-by: Pingfan Liu
    Reviewed-by: Laurent Dufour
    Reviewed-by: Thiago Jung Bauermann
    Signed-off-by: Michael Ellerman
    Link: https://lore.kernel.org/r/159602276920.575379.10390965946438306388.stgit@hbathini

    Hari Bathini
     

25 Mar, 2020

1 commit

05 Jun, 2019

1 commit

  • b886d83c5   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 ... Browse Code »

    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 version 2 of the license

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

    has been chosen to replace the boilerplate/reference in 315 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Allison Randal
    Reviewed-by: Armijn Hemel
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190531190115.503150771@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

02 May, 2019

1 commit

18 Aug, 2018

1 commit

  • 5e2d059b5   Merge tag 'powerpc-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux ... Browse Code »

    Pull powerpc updates from Michael Ellerman:
    "Notable changes:

    - A fix for a bug in our page table fragment allocator, where a page
    table page could be freed and reallocated for something else while
    still in use, leading to memory corruption etc. The fix reuses
    pt_mm in struct page (x86 only) for a powerpc only refcount.

    - Fixes to our pkey support. Several are user-visible changes, but
    bring us in to line with x86 behaviour and/or fix outright bugs.
    Thanks to Florian Weimer for reporting many of these.

    - A series to improve the hvc driver & related OPAL console code,
    which have been seen to cause hardlockups at times. The hvc driver
    changes in particular have been in linux-next for ~month.

    - Increase our MAX_PHYSMEM_BITS to 128TB when SPARSEMEM_VMEMMAP=y.

    - Remove Power8 DD1 and Power9 DD1 support, neither chip should be in
    use anywhere other than as a paper weight.

    - An optimised memcmp implementation using Power7-or-later VMX
    instructions

    - Support for barrier_nospec on some NXP CPUs.

    - Support for flushing the count cache on context switch on some IBM
    CPUs (controlled by firmware), as a Spectre v2 mitigation.

    - A series to enhance the information we print on unhandled signals
    to bring it into line with other arches, including showing the
    offending VMA and dumping the instructions around the fault.

    Thanks to: Aaro Koskinen, Akshay Adiga, Alastair D'Silva, Alexey
    Kardashevskiy, Alexey Spirkov, Alistair Popple, Andrew Donnellan,
    Aneesh Kumar K.V, Anju T Sudhakar, Arnd Bergmann, Bartosz Golaszewski,
    Benjamin Herrenschmidt, Bharat Bhushan, Bjoern Noetel, Boqun Feng,
    Breno Leitao, Bryant G. Ly, Camelia Groza, Christophe Leroy, Christoph
    Hellwig, Cyril Bur, Dan Carpenter, Daniel Klamt, Darren Stevens, Dave
    Young, David Gibson, Diana Craciun, Finn Thain, Florian Weimer,
    Frederic Barrat, Gautham R. Shenoy, Geert Uytterhoeven, Geoff Levand,
    Guenter Roeck, Gustavo Romero, Haren Myneni, Hari Bathini, Joel
    Stanley, Jonathan Neuschäfer, Kees Cook, Madhavan Srinivasan, Mahesh
    Salgaonkar, Markus Elfring, Mathieu Malaterre, Mauro S. M. Rodrigues,
    Michael Hanselmann, Michael Neuling, Michael Schmitz, Mukesh Ojha,
    Murilo Opsfelder Araujo, Nicholas Piggin, Parth Y Shah, Paul
    Mackerras, Paul Menzel, Ram Pai, Randy Dunlap, Rashmica Gupta, Reza
    Arbab, Rodrigo R. Galvao, Russell Currey, Sam Bobroff, Scott Wood,
    Shilpasri G Bhat, Simon Guo, Souptick Joarder, Stan Johnson, Thiago
    Jung Bauermann, Tyrel Datwyler, Vaibhav Jain, Vasant Hegde, Venkat
    Rao, zhong jiang"

    * tag 'powerpc-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (234 commits)
    powerpc/mm/book3s/radix: Add mapping statistics
    powerpc/uaccess: Enable get_user(u64, *p) on 32-bit
    powerpc/mm/hash: Remove unnecessary do { } while(0) loop
    powerpc/64s: move machine check SLB flushing to mm/slb.c
    powerpc/powernv/idle: Fix build error
    powerpc/mm/tlbflush: update the mmu_gather page size while iterating address range
    powerpc/mm: remove warning about ‘type’ being set
    powerpc/32: Include setup.h header file to fix warnings
    powerpc: Move `path` variable inside DEBUG_PROM
    powerpc/powermac: Make some functions static
    powerpc/powermac: Remove variable x that's never read
    cxl: remove a dead branch
    powerpc/powermac: Add missing include of header pmac.h
    powerpc/kexec: Use common error handling code in setup_new_fdt()
    powerpc/xmon: Add address lookup for percpu symbols
    powerpc/mm: remove huge_pte_offset_and_shift() prototype
    powerpc/lib: Use patch_site to patch copy_32 functions once cache is enabled
    powerpc/pseries: Fix endianness while restoring of r3 in MCE handler.
    powerpc/fadump: merge adjacent memory ranges to reduce PT_LOAD segements
    powerpc/fadump: handle crash memory ranges array index overflow
    ...

    Linus Torvalds
     

30 Jul, 2018

1 commit

18 Jul, 2018

1 commit

  • c417fbce9   kbuild: move bin2c back to scripts/ from scripts/basic/ ... Browse Code »

    Commit 8370edea81e3 ("bin2c: move bin2c in scripts/basic") moved bin2c
    to the scripts/basic/ directory, incorrectly stating "Kexec wants to
    use bin2c and it wants to use it really early in the build process.
    See arch/x86/purgatory/ code in later patches."

    Commit bdab125c9301 ("Revert "kexec/purgatory: Add clean-up for
    purgatory directory"") and commit d6605b6bbee8 ("x86/build: Remove
    unnecessary preparation for purgatory") removed the redundant
    purgatory build magic entirely.

    That means that the move of bin2c was unnecessary in the first place.

    fixdep is the only host program that deserves to sit in the
    scripts/basic/ directory.

    Signed-off-by: Masahiro Yamada

    Masahiro Yamada
     

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    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
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

31 Aug, 2017

1 commit

10 Aug, 2017

1 commit

  • 8a583c0a8   powerpc: Fix invalid use of register expressions ... Browse Code »

    binutils >= 2.26 now warns about misuse of register expressions in
    assembler operands that are actually literals, for example:

    arch/powerpc/kernel/entry_64.S:535: Warning: invalid register expression

    In practice these are almost all uses of r0 that should just be a
    literal 0.

    Signed-off-by: Andreas Schwab
    [mpe: Mention r0 is almost always the culprit, fold in purgatory change]
    Signed-off-by: Michael Ellerman

    Andreas Schwab
     

11 Mar, 2017

1 commit

  • 40c50c1fe   kexec, x86/purgatory: Unbreak it and clean it up ... Browse Code »

    The purgatory code defines global variables which are referenced via a
    symbol lookup in the kexec code (core and arch).

    A recent commit addressing sparse warnings made these static and thereby
    broke kexec_file.

    Why did this happen? Simply because the whole machinery is undocumented and
    lacks any form of forward declarations. The variable names are unspecific
    and lack a prefix, so adding forward declarations creates shadow variables
    in the core code. Aside of that the code relies on magic constants and
    duplicate struct definitions with no way to ensure that these things stay
    in sync. The section placement of the purgatory variables happened by
    chance and not by design.

    Unbreak kexec and cleanup the mess:

    - Add proper forward declarations and document the usage
    - Use common struct definition
    - Use the proper common defines instead of magic constants
    - Add a purgatory_ prefix to have a proper name space
    - Use ARRAY_SIZE() instead of a homebrewn reimplementation
    - Add proper sections to the purgatory variables [ From Mike ]

    Fixes: 72042a8c7b01 ("x86/purgatory: Make functions and variables static")
    Reported-by: Mike Galbraith <
    Signed-off-by: Thomas Gleixner
    Cc: Nicholas Mc Guire
    Cc: Borislav Petkov
    Cc: Vivek Goyal
    Cc: "Tobin C. Harding"
    Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1703101315140.3681@nanos
    Signed-off-by: Thomas Gleixner

    Thomas Gleixner
     

30 Nov, 2016

1 commit