22 May, 2020
1 commit
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On some platforms IO-memory might require to use a proper load/store
instructions (like Baikal-T1 IO-memory). To fix the cps-vec UART debug
printout let's add the CONFIG_CPS_NS16550_WIDTH config to determine which
instructions lb/sb, lh/sh or lw/sw are required for MMIO operations.Signed-off-by: Serge Semin
Cc: Alexey Malahov
Cc: Thomas Bogendoerfer
Cc: Paul Burton
Cc: Ralf Baechle
Cc: Arnd Bergmann
Cc: Rob Herring
Cc: devicetree@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer
10 Oct, 2019
1 commit
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CMDLINE, CMDLINE_BOOL & CMDLINE_FORCE all explicitly specify default
values that are the same as the default value for their respective types
anyway (ie. n for booleans, and the empty string for strings).Remove the redundant defaults.
Signed-off-by: Paul Burton
Reviewed-by: Philippe Mathieu-Daudé
Cc: linux-mips@vger.kernel.org
02 Aug, 2018
1 commit
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Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to
the top-level Kconfig. For two architectures that means moving their
arch-specific symbols in that menu into a new arch Kconfig.debug file,
and for a few more creating a dummy file so that we can include it
unconditionally.Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where
it belongs.Signed-off-by: Christoph Hellwig
Signed-off-by: Masahiro Yamada
10 Jan, 2018
1 commit
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The MIPS_CPS_NS16550_BASE and MIPS_CPS_NS16550_SHIFT options have no
defaults for non-Malta platforms which select SYS_SUPPORTS_MIPS_CPS
(i.e. the pistachio and generic platforms). This is problematic for
automated allyesconfig and allmodconfig builds based on these platforms,
since make silentoldconfig tries to ask the user for values, and
especially since v4.15 where the default platform was switched to
generic.Default these options to 0 and arrange for MIPS_CPS_NS16550 to be no
when using that default base address, so that the option only has an
effect when the default is provided (i.e. Malta) or when a value is
provided by the user.Fixes: 609cf6f2291a ("MIPS: CPS: Early debug using an ns16550-compatible UART")
Signed-off-by: James Hogan
Reviewed-by: Paul Burton
Tested-by: Guenter Roeck
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17749/
Signed-off-by: Ralf Baechle
02 Nov, 2017
1 commit
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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
21 Apr, 2017
1 commit
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warning: (SB1XXX_CORELIS) selects DEBUG_INFO which has unmet direct dependencies (DEBUG_KERNEL && !COMPILE_TEST)
Signed-off-by: Ralf Baechle
13 Sep, 2016
1 commit
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Commit c1a0e9bc885d ("MIPS: Allow compact branch policy to be changed")
added Kconfig entries allowing for the compact branch policy used by the
compiler for MIPSr6 kernels to be specified. This can be useful for
debugging, particularly in systems where compact branches have recently
been introduced.Unfortunately mainline gcc 5.x supports MIPSr6 but not the
-mcompact-branches compiler flag, leading to MIPSr6 kernels failing to
build with gcc 5.x with errors such as:mipsel-linux-gnu-gcc: error: unrecognized command line option '-mcompact-branches=optimal'
make[2]: *** [kernel/bounds.s] Error 1Fixing this by hiding the Kconfig entry behind another seems to be more
hassle than it's worth, as MIPSr6 & compact branches have been around
for a while now and if policy does need to be set for debug it can be
done easily enough with KCFLAGS. Therefore remove the compact branch
policy Kconfig entries & their handling in the Makefile.This reverts commit c1a0e9bc885d ("MIPS: Allow compact branch policy to
be changed").Signed-off-by: Paul Burton
Reported-by: kbuild test robot
Fixes: c1a0e9bc885d ("MIPS: Allow compact branch policy to be changed")
Cc: stable # v4.4+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14241/
Signed-off-by: Ralf Baechle
11 Nov, 2015
1 commit
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Provide support for outputting early debug information, in the form of
various register values should an exception occur, during the early
bringup of secondary cores. This code requires an ns16550-compatible
UART accessible from the secondary core, and is written in assembly due
to the environment in which such early exceptions occur where way may
not have a stack, be coherent or even have initialised caches.[ralf@linux-mips.org: Fix merge conflict.]
Signed-off-by: Paul Burton
Cc: linux-mips@linux-mips.org
Cc: Steven J. Hill
Cc: Andrew Bresticker
Cc: Leonid Yegoshin
Cc: Maciej W. Rozycki
Cc: Jason Cooper
Cc: linux-kernel@vger.kernel.org
Cc: James Hogan
Cc: Markos Chandras
Patchwork: https://patchwork.linux-mips.org/patch/11202/
Signed-off-by: Ralf Baechle
26 Oct, 2015
2 commits
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When debugging or examining the performance of a system it can be useful
to examine the effect of L2 prefetching. Provide an optional debugfs
entry to allow a user to enable or disable L2 prefetching.Signed-off-by: Paul Burton
Cc: Maciej W. Rozycki
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11182/
Signed-off-by: Ralf Baechle -
When debugging it can be helpful to change the policy for compiler use
of MIPSr6 compact branches, in order to rule out or home in on their
involvement in bugs. Allow the GCC -mcompact-branches= flag to be set
via Kconfig under the "Kernel hacking" menu.Signed-off-by: Paul Burton
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11178/
Signed-off-by: Ralf Baechle
26 Aug, 2015
1 commit
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The debug.h header provided some MIPS-specific debug macros, which are
no longer used at all. Remove them.Signed-off-by: Paul Burton
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10693/
Signed-off-by: Ralf Baechle
17 Feb, 2015
1 commit
-
The previous implementation did not cover all possible FPU combinations
and it silently allowed ABI incompatible objects to be loaded with the
wrong ABI. For example, the previous logic would set the FP_64 ABI as
the matching ABI for an FP_XX object combined with an FP_64A object.
This was wrong, and the matching ABI should have been FP_64A.
The previous logic is now replaced with a new one which determines
the appropriate FPU mode to be used rather than the FP ABI. This has
the advantage that the entire logic is much simpler since it is the FPU
mode we are interested in rather than the FP ABI resulting to code
simplifications. This also removes the now obsolete FP32XX_HYBRID_FPRS
option.Cc: Matthew Fortune
Cc: Paul Burton
Signed-off-by: Markos Chandras
24 Nov, 2014
1 commit
-
The hybrid FPR scheme exists to allow for compatibility between existing
FP32 code and newly compiled FP64A code. Such code should hopefully be
rare in the real world, and for the moment is difficult to come across.
All code except that built for the FP64 ABI can correctly execute using
the hybrid FPR scheme, so debugging the hybrid FPR implementation can
be eased by forcing all such code to use it. This is undesirable in
general due to the trap & emulate overhead of the hybrid FPR
implementation, but is a very useful option to have for debugging.Signed-off-by: Paul Burton
Cc: linux-mips@linux-mips.org
Cc: Alexander Viro
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7680/
Signed-off-by: Ralf Baechle
24 May, 2014
1 commit
-
Nobody is maintaining SMTC anymore and there also seems to be no userbase.
Which is a pity - the SMTC technology primarily developed by Kevin D.
Kissell is an ingenious demonstration for the MT
ASE's power and elegance.Based on Markos Chandras patch
https://patchwork.linux-mips.org/patch/6719/ which while very similar did
no longer apply cleanly when I tried to merge it plus some additional
post-SMTC cleanup - SMTC was a feature as tricky to remove as it was to
merge once upon a time.Signed-off-by: Ralf Baechle
31 Mar, 2014
1 commit
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This can happen if both the generic 8250 and another early console
driver are enable. Fixed by using an auxilliary kconfig symbol to
restrict that choice.Signed-off-by: Ralf Baechle
30 Oct, 2013
1 commit
-
Signed-off-by: Yoichi Yuasa
Cc: linux-mips
Patchwork: https://patchwork.linux-mips.org/patch/947/
Signed-off-by: Ralf Baechle
05 Jul, 2013
1 commit
-
Original posting:
http://lkml.kernel.org/r/20121214184202.F54094D9@kernel.stglabs.ibm.com
Several architectures have similar stack debugging config options.
They all pretty much do the same thing, some with slightly
differing help text.This patch changes the architectures to instead enable a Kconfig
boolean, and then use that boolean in the generic Kconfig.debug
to present the actual menu option. This removes a bunch of
duplication and adds consistency across arches.Signed-off-by: Dave Hansen
Reviewed-by: H. Peter Anvin
Reviewed-by: James Hogan
Acked-by: Chris Metcalf [for tile]
Signed-off-by: Dave Hansen
Signed-off-by: Linus Torvalds
16 Apr, 2012
1 commit
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Correct spelling typo in various Kconfig file.
Signed-off-by: Masanari Iida
Signed-off-by: Jiri Kosina
25 May, 2011
1 commit
-
Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way. Move it
to lib/Kconfig.debug so each arch doesn't have to define it. This
obviously makes the option generic, but that's fine because the config is
already used in generic code.It's not obvious to me that sysrq-P actually does anything caution by
keeping the most inclusive wording.Signed-off-by: Stephen Boyd
Cc: Chris Metcalf
Acked-by: David S. Miller
Acked-by: Richard Weinberger
Acked-by: Mike Frysinger
Cc: Russell King
Cc: Hirokazu Takata
Acked-by: Ralf Baechle
Cc: Paul Mackerras
Acked-by: Benjamin Herrenschmidt
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Jan, 2011
1 commit
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The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.Reviewed-by: Ingo Molnar
Acked-by: David Woodhouse
Signed-off-by: David Rientjes
Cc: Greg KH
Cc: "David S. Miller"
Cc: Jens Axboe
Cc: Arnd Bergmann
Cc: Robin Holt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Oct, 2010
1 commit
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Add stackoverflow detection to mips arch
Signed-off-by: Adam Jiang
Cc: dmitri.vorobiev@movial.com
Cc: wuzhangjin@gmail.com
Cc: ddaney@caviumnetworks.com
Cc: peterz@infradead.org
Cc: fweisbec@gmail.com
Cc: tj@kernel.org
Cc: tglx@linutronix.de
Cc: mingo@elte.hu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1559/
Patchwork: https://patchwork.linux-mips.org/patch/1651/
Signed-off-by: Ralf Baechle
27 Feb, 2010
2 commits
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This is just a test program for raw_spinlocks. The main reason I
wrote it is to validate my spinlock changes that I sent in a previous
patch.To use it enable CONFIG_DEBUG_FS and CONFIG_SPINLOCK_TEST then at run
time do:# mount -t debugfs none /sys/kernel/debug/
# cat /sys/kernel/debug/mips/spin_single
# cat /sys/kernel/debug/mips/spin_multiOn my 600MHz octeon cn5860 (16 CPUs) I get
spin_single spin_multi
base 106885 247941
spinlock_patch 75194 219465This shows that for uncontended locks the spinlock patch gives 41%
improvement and for contended locks 12% improvement (1/time).Signed-off-by: David Daney
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/969/
Signed-off-by: Ralf Baechle -
This patch adds a new DEBUG_ZBOOT option to allow the users to enable it
to debug the compressed kernel support for a new board and this optoin
should be disabled to reduce the kernel image size and speed up the
kernel booting procedure when the compressed kernel support is stable.Signed-off-by: Wu Zhangjin
To: Ralf Baechle
Cc: Manuel Lauss
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/918/
Signed-off-by: Ralf Baechle
17 Dec, 2009
2 commits
-
Currently, MIPS kernels silently overwrite kernel command-line parameters
hardcoded in CONFIG_CMDLINE by the ones received from firmware. Therefore,
using firmware remains the only reliable method to transfer the
command-line parameters, which is not always desirable or convenient, and
the CONFIG_CMDLINE option is thereby effectively rendered useless.This patch fixes the problem described above and introduces a more flexible
scheme of handling the kernel command line, in a manner identical to what is
currently used for x86. The default behavior, i.e. when CONFIG_CMDLINE_BOOL
is not defined, retains the existing semantics, and firmware command-line
arguments override the hardcoded ones.[Ralf: I fixed up all the defconfig files so the stay unaffected by this
change.]Signed-off-by: Dmitri Vorobiev
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/689/
Signed-off-by: Ralf Baechle -
Signed-off-by: Ralf Baechle
13 Dec, 2008
1 commit
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The header path in the help text for the RUNTIME_DEBUG config option is
obsolete and needs to be updated to match the new location of
architecture-specific header files. While at it, fix the spelling mistake.Signed-off-by: Dmitri Vorobiev
Signed-off-by: Ralf Baechle
31 Jul, 2008
1 commit
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This patch explicitly removes the kgdb implementation, for mips which
is intended to be followed by a patch that adds a kgdb implementation
for MIPS that makes use of the kgdb core in the kernel.Signed-off-by: Jason Wessel
Signed-off-by: Ralf Baechle
29 Apr, 2008
1 commit
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Slightly tacky, but there is a precedent in the sparc archirecture code.
Signed-off-by: Chris Dearman
Signed-off-by: Atsushi Nemoto
Signed-off-by: Ralf Baechle
23 Oct, 2007
1 commit
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Signed-off-by: Ralf Baechle
06 Jul, 2007
1 commit
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This effectivly turned the SMTC_IDLE_HOOK_DEBUG debug option into a no-op.
Signed-off-by: Ralf Baechle
27 Feb, 2007
1 commit
-
Signed-off-by: Ralf Baechle
20 Feb, 2007
1 commit
-
Signed-off-by: Ralf Baechle
07 Feb, 2007
1 commit
-
Signed-off-by: Jan Altenberg
Signed-off-by: Ralf Baechle
14 Jul, 2006
1 commit
-
Signed-off-by: Ralf Baechle
27 Apr, 2006
1 commit
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Signed-off-by: Ralf Baechle
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
