License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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 <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers 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 the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version 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 correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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# SPDX-License-Identifier: GPL-2.0
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2005-09-26 14:04:21 +08:00
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2009-06-10 04:48:51 +08:00
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config PPC_DISABLE_WERROR
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bool "Don't build arch/powerpc code with -Werror"
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help
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This option tells the compiler NOT to build the code under
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arch/powerpc with the -Werror flag (which means warnings
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are treated as errors).
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Only enable this if you are hitting a build failure in the
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arch/powerpc code caused by a warning, and you don't feel
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inclined to fix it.
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config PPC_WERROR
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bool
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depends on !PPC_DISABLE_WERROR
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default y
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2008-11-20 11:24:07 +08:00
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config PRINT_STACK_DEPTH
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int "Stack depth to print" if DEBUG_KERNEL
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default 64
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help
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This option allows you to set the stack depth that the kernel
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prints in stack traces. This can be useful if your display is
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too small and stack traces cause important information to
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scroll off the screen.
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2006-09-07 07:23:12 +08:00
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config HCALL_STATS
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bool "Hypervisor call instrumentation"
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2009-10-27 02:50:29 +08:00
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depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
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2006-09-07 07:23:12 +08:00
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help
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Adds code to keep track of the number of hypervisor calls made and
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2007-05-09 13:12:20 +08:00
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the amount of time spent in hypervisor calls. Wall time spent in
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2006-09-07 07:23:12 +08:00
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each call is always calculated, and if available CPU cycles spent
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are also calculated. A directory named hcall_inst is added at the
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root of the debugfs filesystem. Within the hcall_inst directory
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are files that contain CPU specific call statistics.
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This option will add a small amount of overhead to all hypervisor
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calls.
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2009-05-18 10:10:05 +08:00
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config PPC_EMULATED_STATS
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bool "Emulated instructions tracking"
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depends on DEBUG_FS
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help
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Adds code to keep track of the number of instructions that are
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emulated by the in-kernel emulator. Counters for the various classes
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of emulated instructions are available under
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powerpc/emulated_instructions/ in the root of the debugfs file
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system. Optionally (controlled by
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powerpc/emulated_instructions/do_warn in debugfs), rate-limited
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warnings can be printed to the console when instructions are
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emulated.
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2008-06-24 09:32:32 +08:00
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config CODE_PATCHING_SELFTEST
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2015-12-21 14:38:41 +08:00
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bool "Run self-tests of the code-patching code"
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2008-06-24 09:32:32 +08:00
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depends on DEBUG_KERNEL
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2016-07-27 20:46:29 +08:00
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config JUMP_LABEL_FEATURE_CHECKS
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bool "Enable use of jump label for cpu/mmu_has_feature()"
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depends on JUMP_LABEL
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default y
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help
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Selecting this options enables use of jump labels for some internal
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feature checks. This should generate more optimal code for those
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checks.
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2016-07-23 17:12:43 +08:00
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config JUMP_LABEL_FEATURE_CHECK_DEBUG
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bool "Do extra check on feature fixup calls"
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depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
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help
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This tries to catch incorrect usage of cpu_has_feature() and
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mmu_has_feature() in the code.
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If you don't know what this means, say N.
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2008-06-24 09:33:03 +08:00
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config FTR_FIXUP_SELFTEST
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2015-12-21 14:38:41 +08:00
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bool "Run self-tests of the feature-fixup code"
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2008-06-24 09:33:03 +08:00
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depends on DEBUG_KERNEL
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2008-08-06 07:10:01 +08:00
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config MSI_BITMAP_SELFTEST
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2015-12-21 14:38:41 +08:00
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bool "Run self-tests of the MSI bitmap code"
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2008-08-06 07:10:01 +08:00
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depends on DEBUG_KERNEL
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2017-12-20 11:55:54 +08:00
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config PPC_IRQ_SOFT_MASK_DEBUG
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bool "Include extra checks for powerpc irq soft masking"
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2005-09-26 14:04:21 +08:00
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config XMON
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bool "Include xmon kernel debugger"
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2008-07-24 00:30:15 +08:00
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depends on DEBUG_KERNEL
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2005-09-26 14:04:21 +08:00
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help
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Include in-kernel hooks for the xmon kernel monitor/debugger.
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Unless you are intending to debug the kernel, say N here.
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2005-10-10 20:15:52 +08:00
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Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
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nothing will appear on the screen (xmon writes directly to the
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framebuffer memory).
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The cmdline option 'xmon' or 'xmon=early' will drop into xmon
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very early during boot. 'xmon=on' will just enable the xmon
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debugger hooks. 'xmon=off' will disable the debugger hooks
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if CONFIG_XMON_DEFAULT is set.
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2006-09-08 22:29:21 +08:00
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xmon will print a backtrace on the very first invocation.
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'xmon=nobt' will disable this autobacktrace.
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2005-10-10 20:15:52 +08:00
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config XMON_DEFAULT
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bool "Enable xmon by default"
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depends on XMON
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help
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xmon is normally disabled unless booted with 'xmon=on'.
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Use 'xmon=off' to disable xmon init during runtime.
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2006-11-23 07:46:45 +08:00
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config XMON_DISASSEMBLY
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bool "Include disassembly support in xmon"
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depends on XMON
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default y
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help
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Include support for disassembling in xmon. You probably want
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to say Y here, unless you're building for a memory-constrained
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system.
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2019-04-16 11:26:38 +08:00
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config XMON_DEFAULT_RO_MODE
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bool "Restrict xmon to read-only operations by default"
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depends on XMON
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default y
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help
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2019-11-21 11:21:01 +08:00
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Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
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'xmon=ro' override this default.
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2019-04-16 11:26:38 +08:00
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2008-07-24 00:30:15 +08:00
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config DEBUGGER
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bool
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depends on KGDB || XMON
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default y
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2005-09-26 14:04:21 +08:00
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config BDI_SWITCH
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bool "Include BDI-2000 user context switcher"
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2005-10-10 20:15:52 +08:00
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depends on DEBUG_KERNEL && PPC32
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2005-09-26 14:04:21 +08:00
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help
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Include in-kernel support for the Abatron BDI2000 debugger.
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Unless you are intending to debug the kernel with one of these
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machines, say N here.
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config BOOTX_TEXT
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bool "Support for early boot text console (BootX or OpenFirmware only)"
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2015-03-12 20:32:50 +08:00
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depends on PPC_BOOK3S
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2005-09-26 14:04:21 +08:00
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help
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Say Y here to see progress messages from the boot firmware in text
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mode. Requires either BootX or Open Firmware.
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2006-05-09 14:03:51 +08:00
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config PPC_EARLY_DEBUG
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bool "Early debugging (dangerous)"
|
2007-12-11 11:48:24 +08:00
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help
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Say Y to enable some early debugging facilities that may be available
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for your processor/board combination. Those facilities are hacks
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intended to debug problems early during boot, this should not be
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enabled in a production kernel.
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Note that enabling this will also cause the kernel default log level
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to be pushed to max automatically very early during boot
|
2006-05-09 14:03:51 +08:00
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2006-01-11 08:54:09 +08:00
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choice
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2006-05-09 14:03:51 +08:00
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prompt "Early debugging console"
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depends on PPC_EARLY_DEBUG
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2006-01-11 08:54:09 +08:00
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help
|
2006-05-09 14:03:51 +08:00
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Use the selected console for early debugging. Careful, if you
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enable debugging for the wrong type of machine your kernel
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_will not boot_.
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2006-01-11 08:54:09 +08:00
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2013-04-29 11:42:43 +08:00
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config PPC_EARLY_DEBUG_BOOTX
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bool "BootX or OpenFirmware"
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depends on BOOTX_TEXT
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help
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Select this to enable early debugging for a machine using BootX
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or OpenFirmware.
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2006-01-11 08:54:09 +08:00
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config PPC_EARLY_DEBUG_LPAR
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bool "LPAR HV Console"
|
2016-06-28 13:02:46 +08:00
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depends on PPC_PSERIES && HVC_CONSOLE
|
2006-01-11 08:54:09 +08:00
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help
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Select this to enable early debugging for a machine with a HVC
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console on vterm 0.
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powerpc/pseries: Re-implement HVSI as part of hvc_vio
On pseries machines, consoles are provided by the hypervisor using
a low level get_chars/put_chars type interface. However, this is
really just a transport to the service processor which implements
them either as "raw" console (networked consoles, HMC, ...) or as
"hvsi" serial ports.
The later is a simple packet protocol on top of the raw character
interface that is supposed to convey additional "serial port" style
semantics. In practice however, all it does is provide a way to
read the CD line and set/clear our DTR line, that's it.
We currently implement the "raw" protocol as an hvc console backend
(/dev/hvcN) and the "hvsi" protocol using a separate tty driver
(/dev/hvsi0).
However this is quite impractical. The arbitrary difference between
the two type of devices has been a major source of user (and distro)
confusion. Additionally, there's an additional mini -hvsi implementation
in the pseries platform code for our low level debug console and early
boot kernel messages, which means code duplication, though that low
level variant is impractical as it's incapable of doing the initial
protocol negociation to establish the link to the FSP.
This essentially replaces the dedicated hvsi driver and the platform
udbg code completely by extending the existing hvc_vio backend used
in "raw" mode so that:
- It now supports HVSI as well
- We add support for hvc backend providing tiocm{get,set}
- It also provides a udbg interface for early debug and boot console
This is overall less code, though this will only be obvious once we
remove the old "hvsi" driver, which is still available for now. When
the old driver is enabled, the new code still kicks in for the low
level udbg console, replacing the old mini implementation in the platform
code, it just doesn't provide the higher level "hvc" interface.
In addition to producing generally simler code, this has several benefits
over our current situation:
- The user/distro only has to deal with /dev/hvcN for the hypervisor
console, avoiding all sort of confusion that has plagued us in the past
- The tty, kernel and low level debug console all use the same code
base which supports the full protocol establishment process, thus the
console is now available much earlier than it used to be with the
old HVSI driver. The kernel console works much earlier and udbg is
available much earlier too. Hackers can enable a hard coded very-early
debug console as well that works with HVSI (previously that was only
supported for the "raw" mode).
I've tried to keep the same semantics as hvsi relative to how I react
to things like CD changes, with some subtle differences though:
- I clear DTR on close if HUPCL is set
- Current hvsi triggers a hangup if it detects a up->down transition
on CD (you can still open a console with CD down). My new implementation
triggers a hangup if the link to the FSP is severed, and severs it upon
detecting a up->down transition on CD.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-05-12 11:46:38 +08:00
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config PPC_EARLY_DEBUG_LPAR_HVSI
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bool "LPAR HVSI Console"
|
2016-06-28 13:02:46 +08:00
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depends on PPC_PSERIES && HVC_CONSOLE
|
powerpc/pseries: Re-implement HVSI as part of hvc_vio
On pseries machines, consoles are provided by the hypervisor using
a low level get_chars/put_chars type interface. However, this is
really just a transport to the service processor which implements
them either as "raw" console (networked consoles, HMC, ...) or as
"hvsi" serial ports.
The later is a simple packet protocol on top of the raw character
interface that is supposed to convey additional "serial port" style
semantics. In practice however, all it does is provide a way to
read the CD line and set/clear our DTR line, that's it.
We currently implement the "raw" protocol as an hvc console backend
(/dev/hvcN) and the "hvsi" protocol using a separate tty driver
(/dev/hvsi0).
However this is quite impractical. The arbitrary difference between
the two type of devices has been a major source of user (and distro)
confusion. Additionally, there's an additional mini -hvsi implementation
in the pseries platform code for our low level debug console and early
boot kernel messages, which means code duplication, though that low
level variant is impractical as it's incapable of doing the initial
protocol negociation to establish the link to the FSP.
This essentially replaces the dedicated hvsi driver and the platform
udbg code completely by extending the existing hvc_vio backend used
in "raw" mode so that:
- It now supports HVSI as well
- We add support for hvc backend providing tiocm{get,set}
- It also provides a udbg interface for early debug and boot console
This is overall less code, though this will only be obvious once we
remove the old "hvsi" driver, which is still available for now. When
the old driver is enabled, the new code still kicks in for the low
level udbg console, replacing the old mini implementation in the platform
code, it just doesn't provide the higher level "hvc" interface.
In addition to producing generally simler code, this has several benefits
over our current situation:
- The user/distro only has to deal with /dev/hvcN for the hypervisor
console, avoiding all sort of confusion that has plagued us in the past
- The tty, kernel and low level debug console all use the same code
base which supports the full protocol establishment process, thus the
console is now available much earlier than it used to be with the
old HVSI driver. The kernel console works much earlier and udbg is
available much earlier too. Hackers can enable a hard coded very-early
debug console as well that works with HVSI (previously that was only
supported for the "raw" mode).
I've tried to keep the same semantics as hvsi relative to how I react
to things like CD changes, with some subtle differences though:
- I clear DTR on close if HUPCL is set
- Current hvsi triggers a hangup if it detects a up->down transition
on CD (you can still open a console with CD down). My new implementation
triggers a hangup if the link to the FSP is severed, and severs it upon
detecting a up->down transition on CD.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-05-12 11:46:38 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for a machine with a HVSI
|
|
|
|
|
console on a specified vterm.
|
|
|
|
|
|
2006-01-11 08:54:09 +08:00
|
|
|
config PPC_EARLY_DEBUG_G5
|
|
|
|
|
bool "Apple G5"
|
|
|
|
|
depends on PPC_PMAC64
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for Apple G5 machines.
|
|
|
|
|
|
2006-06-23 16:20:16 +08:00
|
|
|
config PPC_EARLY_DEBUG_RTAS_PANEL
|
2006-01-11 08:54:09 +08:00
|
|
|
bool "RTAS Panel"
|
|
|
|
|
depends on PPC_RTAS
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging via the RTAS panel.
|
|
|
|
|
|
2006-06-23 16:20:16 +08:00
|
|
|
config PPC_EARLY_DEBUG_RTAS_CONSOLE
|
|
|
|
|
bool "RTAS Console"
|
|
|
|
|
depends on PPC_RTAS
|
|
|
|
|
select UDBG_RTAS_CONSOLE
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging via the RTAS console.
|
|
|
|
|
|
2006-01-11 08:54:09 +08:00
|
|
|
config PPC_EARLY_DEBUG_MAPLE
|
|
|
|
|
bool "Maple real mode"
|
|
|
|
|
depends on PPC_MAPLE
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for Maple.
|
|
|
|
|
|
2007-02-05 06:36:49 +08:00
|
|
|
config PPC_EARLY_DEBUG_PAS_REALMODE
|
|
|
|
|
bool "PA Semi real mode"
|
|
|
|
|
depends on PPC_PASEMI
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for PA Semi.
|
|
|
|
|
Output will be on UART0.
|
|
|
|
|
|
2007-05-08 10:59:31 +08:00
|
|
|
config PPC_EARLY_DEBUG_44x
|
|
|
|
|
bool "Early serial debugging for IBM/AMCC 44x CPUs"
|
2014-07-25 16:38:59 +08:00
|
|
|
depends on 44x
|
2007-05-08 10:59:31 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for IBM 44x chips via the
|
2007-12-21 12:39:28 +08:00
|
|
|
inbuilt serial port. If you enable this, ensure you set
|
2019-11-21 11:21:01 +08:00
|
|
|
PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
|
2007-05-08 10:59:31 +08:00
|
|
|
|
2007-12-21 12:39:26 +08:00
|
|
|
config PPC_EARLY_DEBUG_40x
|
|
|
|
|
bool "Early serial debugging for IBM/AMCC 40x CPUs"
|
|
|
|
|
depends on 40x
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for IBM 40x chips via the
|
|
|
|
|
inbuilt serial port. This works on chips with a 16550 compatible
|
2020-05-22 00:55:52 +08:00
|
|
|
UART.
|
2007-12-21 12:39:26 +08:00
|
|
|
|
2007-07-17 00:43:43 +08:00
|
|
|
config PPC_EARLY_DEBUG_CPM
|
|
|
|
|
bool "Early serial debugging for Freescale CPM-based serial ports"
|
|
|
|
|
depends on SERIAL_CPM
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for Freescale chips
|
|
|
|
|
using a CPM-based serial port. This assumes that the bootwrapper
|
|
|
|
|
has run, and set up the CPM in a particular way.
|
|
|
|
|
|
2009-12-12 14:31:51 +08:00
|
|
|
config PPC_EARLY_DEBUG_USBGECKO
|
|
|
|
|
bool "Early debugging through the USB Gecko adapter"
|
|
|
|
|
depends on GAMECUBE_COMMON
|
|
|
|
|
select USBGECKO_UDBG
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for Nintendo GameCube/Wii
|
|
|
|
|
consoles via an external USB Gecko adapter.
|
|
|
|
|
|
2011-08-31 14:32:26 +08:00
|
|
|
config PPC_EARLY_DEBUG_PS3GELIC
|
|
|
|
|
bool "Early debugging through the PS3 Ethernet port"
|
|
|
|
|
depends on PPC_PS3
|
|
|
|
|
select PS3GELIC_UDBG
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for the PlayStation3 via
|
|
|
|
|
UDP broadcasts sent out through the Ethernet port.
|
|
|
|
|
|
2011-09-20 01:44:59 +08:00
|
|
|
config PPC_EARLY_DEBUG_OPAL_RAW
|
|
|
|
|
bool "OPAL raw console"
|
|
|
|
|
depends on HVC_OPAL
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for the PowerNV platform
|
|
|
|
|
using a "raw" console
|
|
|
|
|
|
|
|
|
|
config PPC_EARLY_DEBUG_OPAL_HVSI
|
|
|
|
|
bool "OPAL hvsi console"
|
|
|
|
|
depends on HVC_OPAL
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging for the PowerNV platform
|
|
|
|
|
using an "hvsi" console
|
|
|
|
|
|
2013-04-30 02:07:47 +08:00
|
|
|
config PPC_EARLY_DEBUG_MEMCONS
|
|
|
|
|
bool "In memory console"
|
|
|
|
|
help
|
|
|
|
|
Select this to enable early debugging using an in memory console.
|
|
|
|
|
This console provides input and output buffers stored within the
|
|
|
|
|
kernel BSS and should be safe to select on any system. A debugger
|
|
|
|
|
can then be used to read kernel output or send input to the console.
|
2006-01-11 08:54:09 +08:00
|
|
|
endchoice
|
|
|
|
|
|
2013-04-30 02:07:47 +08:00
|
|
|
config PPC_MEMCONS_OUTPUT_SIZE
|
|
|
|
|
int "In memory console output buffer size"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_MEMCONS
|
|
|
|
|
default 4096
|
|
|
|
|
help
|
|
|
|
|
Selects the size of the output buffer (in bytes) of the in memory
|
|
|
|
|
console.
|
|
|
|
|
|
|
|
|
|
config PPC_MEMCONS_INPUT_SIZE
|
|
|
|
|
int "In memory console input buffer size"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_MEMCONS
|
|
|
|
|
default 128
|
|
|
|
|
help
|
|
|
|
|
Selects the size of the input buffer (in bytes) of the in memory
|
|
|
|
|
console.
|
|
|
|
|
|
2011-09-20 01:44:59 +08:00
|
|
|
config PPC_EARLY_DEBUG_OPAL
|
|
|
|
|
def_bool y
|
|
|
|
|
depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
|
|
|
|
|
|
|
|
|
|
|
powerpc/pseries: Re-implement HVSI as part of hvc_vio
On pseries machines, consoles are provided by the hypervisor using
a low level get_chars/put_chars type interface. However, this is
really just a transport to the service processor which implements
them either as "raw" console (networked consoles, HMC, ...) or as
"hvsi" serial ports.
The later is a simple packet protocol on top of the raw character
interface that is supposed to convey additional "serial port" style
semantics. In practice however, all it does is provide a way to
read the CD line and set/clear our DTR line, that's it.
We currently implement the "raw" protocol as an hvc console backend
(/dev/hvcN) and the "hvsi" protocol using a separate tty driver
(/dev/hvsi0).
However this is quite impractical. The arbitrary difference between
the two type of devices has been a major source of user (and distro)
confusion. Additionally, there's an additional mini -hvsi implementation
in the pseries platform code for our low level debug console and early
boot kernel messages, which means code duplication, though that low
level variant is impractical as it's incapable of doing the initial
protocol negociation to establish the link to the FSP.
This essentially replaces the dedicated hvsi driver and the platform
udbg code completely by extending the existing hvc_vio backend used
in "raw" mode so that:
- It now supports HVSI as well
- We add support for hvc backend providing tiocm{get,set}
- It also provides a udbg interface for early debug and boot console
This is overall less code, though this will only be obvious once we
remove the old "hvsi" driver, which is still available for now. When
the old driver is enabled, the new code still kicks in for the low
level udbg console, replacing the old mini implementation in the platform
code, it just doesn't provide the higher level "hvc" interface.
In addition to producing generally simler code, this has several benefits
over our current situation:
- The user/distro only has to deal with /dev/hvcN for the hypervisor
console, avoiding all sort of confusion that has plagued us in the past
- The tty, kernel and low level debug console all use the same code
base which supports the full protocol establishment process, thus the
console is now available much earlier than it used to be with the
old HVSI driver. The kernel console works much earlier and udbg is
available much earlier too. Hackers can enable a hard coded very-early
debug console as well that works with HVSI (previously that was only
supported for the "raw" mode).
I've tried to keep the same semantics as hvsi relative to how I react
to things like CD changes, with some subtle differences though:
- I clear DTR on close if HUPCL is set
- Current hvsi triggers a hangup if it detects a up->down transition
on CD (you can still open a console with CD down). My new implementation
triggers a hangup if the link to the FSP is severed, and severs it upon
detecting a up->down transition on CD.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-05-12 11:46:38 +08:00
|
|
|
config PPC_EARLY_DEBUG_HVSI_VTERMNO
|
|
|
|
|
hex "vterm number to use with early debug HVSI"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_LPAR_HVSI
|
|
|
|
|
default "0x30000000"
|
|
|
|
|
help
|
|
|
|
|
You probably want 0x30000000 for your first serial port and
|
|
|
|
|
0x30000001 for your second one
|
|
|
|
|
|
2011-09-20 01:44:59 +08:00
|
|
|
config PPC_EARLY_DEBUG_OPAL_VTERMNO
|
|
|
|
|
hex "vterm number to use with OPAL early debug"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_OPAL
|
|
|
|
|
default "0"
|
|
|
|
|
help
|
|
|
|
|
This correspond to which /dev/hvcN you want to use for early
|
|
|
|
|
debug.
|
|
|
|
|
|
|
|
|
|
On OPAL v2, this will be 0 for network console and 1 or 2 for
|
|
|
|
|
the machine built-in serial ports.
|
|
|
|
|
|
2007-05-08 10:59:31 +08:00
|
|
|
config PPC_EARLY_DEBUG_44x_PHYSLOW
|
|
|
|
|
hex "Low 32 bits of early debug UART physical address"
|
2007-09-27 02:02:52 +08:00
|
|
|
depends on PPC_EARLY_DEBUG_44x
|
2007-05-08 10:59:31 +08:00
|
|
|
default "0x40000200"
|
2007-12-21 12:39:28 +08:00
|
|
|
help
|
|
|
|
|
You probably want 0x40000200 for ebony boards and
|
2019-11-21 11:21:01 +08:00
|
|
|
0x40000300 for taishan
|
2007-05-08 10:59:31 +08:00
|
|
|
|
|
|
|
|
config PPC_EARLY_DEBUG_44x_PHYSHIGH
|
|
|
|
|
hex "EPRN of early debug UART physical address"
|
2007-09-27 02:02:52 +08:00
|
|
|
depends on PPC_EARLY_DEBUG_44x
|
2007-05-08 10:59:31 +08:00
|
|
|
default "0x1"
|
|
|
|
|
|
2007-12-21 12:39:26 +08:00
|
|
|
config PPC_EARLY_DEBUG_40x_PHYSADDR
|
|
|
|
|
hex "Early debug UART physical address"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_40x
|
|
|
|
|
default "0xef600300"
|
|
|
|
|
|
2007-07-17 00:43:43 +08:00
|
|
|
config PPC_EARLY_DEBUG_CPM_ADDR
|
|
|
|
|
hex "CPM UART early debug transmit descriptor address"
|
|
|
|
|
depends on PPC_EARLY_DEBUG_CPM
|
2007-09-29 03:06:16 +08:00
|
|
|
default "0xfa202008" if PPC_EP88XC
|
2008-04-10 23:01:59 +08:00
|
|
|
default "0xf0001ff8" if CPM2
|
2007-09-29 03:06:16 +08:00
|
|
|
default "0xff002008" if CPM1
|
2007-07-17 00:43:43 +08:00
|
|
|
help
|
|
|
|
|
This specifies the address of the transmit descriptor
|
|
|
|
|
used for early debug output. Because it is needed before
|
|
|
|
|
platform probing is done, all platforms selected must
|
|
|
|
|
share the same address.
|
|
|
|
|
|
2012-06-25 02:26:17 +08:00
|
|
|
config FAIL_IOMMU
|
|
|
|
|
bool "Fault-injection capability for IOMMU"
|
|
|
|
|
depends on FAULT_INJECTION
|
|
|
|
|
help
|
|
|
|
|
Provide fault-injection capability for IOMMU. Each device can
|
|
|
|
|
be selectively enabled via the fail_iommu property.
|
|
|
|
|
|
|
|
|
|
If you are unsure, say N.
|
|
|
|
|
|
2016-05-27 13:48:59 +08:00
|
|
|
config PPC_PTDUMP
|
2019-11-21 11:21:01 +08:00
|
|
|
bool "Export kernel pagetable layout to userspace via debugfs"
|
|
|
|
|
depends on DEBUG_KERNEL && DEBUG_FS
|
|
|
|
|
help
|
2016-05-27 13:48:59 +08:00
|
|
|
This option exports the state of the kernel pagetables to a
|
|
|
|
|
debugfs file. This is only useful for kernel developers who are
|
|
|
|
|
working in architecture specific areas of the kernel - probably
|
|
|
|
|
not a good idea to enable this feature in a production kernel.
|
|
|
|
|
|
|
|
|
|
If you are unsure, say N.
|
|
|
|
|
|
2019-05-02 15:39:47 +08:00
|
|
|
config PPC_DEBUG_WX
|
|
|
|
|
bool "Warn on W+X mappings at boot"
|
2020-01-14 16:13:10 +08:00
|
|
|
depends on PPC_PTDUMP && STRICT_KERNEL_RWX
|
2019-05-02 15:39:47 +08:00
|
|
|
help
|
|
|
|
|
Generate a warning if any W+X mappings are found at boot.
|
|
|
|
|
|
|
|
|
|
This is useful for discovering cases where the kernel is leaving
|
|
|
|
|
W+X mappings after applying NX, as such mappings are a security risk.
|
|
|
|
|
|
|
|
|
|
Note that even if the check fails, your kernel is possibly
|
|
|
|
|
still fine, as W+X mappings are not a security hole in
|
|
|
|
|
themselves, what they do is that they make the exploitation
|
|
|
|
|
of other unfixed kernel bugs easier.
|
|
|
|
|
|
|
|
|
|
There is no runtime or memory usage effect of this option
|
|
|
|
|
once the kernel has booted up - it's a one time check.
|
|
|
|
|
|
|
|
|
|
If in doubt, say "Y".
|
|
|
|
|
|
2017-10-09 18:54:05 +08:00
|
|
|
config PPC_FAST_ENDIAN_SWITCH
|
|
|
|
|
bool "Deprecated fast endian-switch syscall"
|
2019-11-21 11:21:01 +08:00
|
|
|
depends on DEBUG_KERNEL && PPC_BOOK3S_64
|
|
|
|
|
help
|
2017-10-09 18:54:05 +08:00
|
|
|
If you're unsure what this is, say N.
|
2019-04-27 00:23:32 +08:00
|
|
|
|
|
|
|
|
config KASAN_SHADOW_OFFSET
|
|
|
|
|
hex
|
|
|
|
|
depends on KASAN
|
|
|
|
|
default 0xe0000000
|