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 14:07:57 +00:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-16 22:20:36 +00:00
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/*
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2012-07-20 09:15:04 +00:00
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* Copyright IBM Corp. 2004, 2011
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2011-05-26 07:48:24 +00:00
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
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* Holger Smolinski <Holger.Smolinski@de.ibm.com>,
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* Thomas Spatzier <tspat@de.ibm.com>,
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2005-04-16 22:20:36 +00:00
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*
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* This file contains interrupt related functions.
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*/
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#include <linux/kernel_stat.h>
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#include <linux/interrupt.h>
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#include <linux/seq_file.h>
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2007-02-05 20:16:44 +00:00
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#include <linux/proc_fs.h>
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#include <linux/profile.h>
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2017-02-09 20:20:23 +00:00
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#include <linux/export.h>
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2011-05-26 07:48:24 +00:00
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#include <linux/kernel.h>
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#include <linux/ftrace.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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2017-02-09 20:20:23 +00:00
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#include <linux/init.h>
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2011-05-26 07:48:24 +00:00
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#include <linux/cpu.h>
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2014-03-04 22:57:29 +00:00
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#include <linux/irq.h>
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2020-11-21 10:14:56 +00:00
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#include <linux/entry-common.h>
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2011-05-26 07:48:24 +00:00
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#include <asm/irq_regs.h>
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#include <asm/cputime.h>
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#include <asm/lowcore.h>
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#include <asm/irq.h>
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2013-06-27 07:01:09 +00:00
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#include <asm/hw_irq.h>
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2019-01-28 07:33:08 +00:00
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#include <asm/stacktrace.h>
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2021-02-09 23:40:53 +00:00
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#include <asm/softirq_stack.h>
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2011-05-26 07:48:24 +00:00
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#include "entry.h"
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2005-04-16 22:20:36 +00:00
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2013-01-02 14:18:18 +00:00
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DEFINE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
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EXPORT_PER_CPU_SYMBOL_GPL(irq_stat);
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2011-01-05 11:47:28 +00:00
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struct irq_class {
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2014-07-22 14:58:52 +00:00
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int irq;
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2011-01-05 11:47:28 +00:00
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char *name;
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char *desc;
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};
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2013-01-02 14:18:18 +00:00
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/*
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2013-03-16 11:53:05 +00:00
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* The list of "main" irq classes on s390. This is the list of interrupts
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2013-01-02 14:18:18 +00:00
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* that appear both in /proc/stat ("intr" line) and /proc/interrupts.
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* Historically only external and I/O interrupts have been part of /proc/stat.
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* We can't add the split external and I/O sub classes since the first field
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* in the "intr" line in /proc/stat is supposed to be the sum of all other
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* fields.
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* Since the external and I/O interrupt fields are already sums we would end
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* up with having a sum which accounts each interrupt twice.
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*/
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2013-06-27 07:01:09 +00:00
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static const struct irq_class irqclass_main_desc[NR_IRQS_BASE] = {
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2014-07-22 14:58:52 +00:00
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{.irq = EXT_INTERRUPT, .name = "EXT"},
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{.irq = IO_INTERRUPT, .name = "I/O"},
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{.irq = THIN_INTERRUPT, .name = "AIO"},
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2013-01-02 14:18:18 +00:00
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};
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/*
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* The list of split external and I/O interrupts that appear only in
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* /proc/interrupts.
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* In addition this list contains non external / I/O events like NMIs.
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*/
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2015-03-25 07:05:49 +00:00
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static const struct irq_class irqclass_sub_desc[] = {
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2014-07-22 14:58:52 +00:00
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{.irq = IRQEXT_CLK, .name = "CLK", .desc = "[EXT] Clock Comparator"},
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{.irq = IRQEXT_EXC, .name = "EXC", .desc = "[EXT] External Call"},
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{.irq = IRQEXT_EMS, .name = "EMS", .desc = "[EXT] Emergency Signal"},
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{.irq = IRQEXT_TMR, .name = "TMR", .desc = "[EXT] CPU Timer"},
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{.irq = IRQEXT_TLA, .name = "TAL", .desc = "[EXT] Timing Alert"},
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{.irq = IRQEXT_PFL, .name = "PFL", .desc = "[EXT] Pseudo Page Fault"},
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{.irq = IRQEXT_DSD, .name = "DSD", .desc = "[EXT] DASD Diag"},
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{.irq = IRQEXT_VRT, .name = "VRT", .desc = "[EXT] Virtio"},
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{.irq = IRQEXT_SCP, .name = "SCP", .desc = "[EXT] Service Call"},
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{.irq = IRQEXT_IUC, .name = "IUC", .desc = "[EXT] IUCV"},
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{.irq = IRQEXT_CMS, .name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling"},
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{.irq = IRQEXT_CMC, .name = "CMC", .desc = "[EXT] CPU-Measurement: Counter"},
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2013-04-08 07:52:57 +00:00
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{.irq = IRQEXT_FTP, .name = "FTP", .desc = "[EXT] HMC FTP Service"},
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2014-07-22 14:58:52 +00:00
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{.irq = IRQIO_CIO, .name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt"},
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{.irq = IRQIO_DAS, .name = "DAS", .desc = "[I/O] DASD"},
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{.irq = IRQIO_C15, .name = "C15", .desc = "[I/O] 3215"},
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{.irq = IRQIO_C70, .name = "C70", .desc = "[I/O] 3270"},
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{.irq = IRQIO_TAP, .name = "TAP", .desc = "[I/O] Tape"},
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{.irq = IRQIO_VMR, .name = "VMR", .desc = "[I/O] Unit Record Devices"},
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{.irq = IRQIO_LCS, .name = "LCS", .desc = "[I/O] LCS"},
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{.irq = IRQIO_CTC, .name = "CTC", .desc = "[I/O] CTC"},
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{.irq = IRQIO_ADM, .name = "ADM", .desc = "[I/O] EADM Subchannel"},
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{.irq = IRQIO_CSC, .name = "CSC", .desc = "[I/O] CHSC Subchannel"},
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{.irq = IRQIO_VIR, .name = "VIR", .desc = "[I/O] Virtual I/O Devices"},
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2017-02-14 17:13:09 +00:00
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{.irq = IRQIO_QAI, .name = "QAI", .desc = "[AIO] QDIO Adapter Interrupt"},
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{.irq = IRQIO_APB, .name = "APB", .desc = "[AIO] AP Bus"},
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2018-11-22 13:08:33 +00:00
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{.irq = IRQIO_PCF, .name = "PCF", .desc = "[AIO] PCI Floating Interrupt"},
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{.irq = IRQIO_PCD, .name = "PCD", .desc = "[AIO] PCI Directed Interrupt"},
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2017-02-14 17:13:09 +00:00
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{.irq = IRQIO_MSI, .name = "MSI", .desc = "[AIO] MSI Interrupt"},
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{.irq = IRQIO_VAI, .name = "VAI", .desc = "[AIO] Virtual I/O Devices AI"},
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{.irq = IRQIO_GAL, .name = "GAL", .desc = "[AIO] GIB Alert"},
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2014-07-22 14:58:52 +00:00
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{.irq = NMI_NMI, .name = "NMI", .desc = "[NMI] Machine Check"},
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{.irq = CPU_RST, .name = "RST", .desc = "[CPU] CPU Restart"},
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2011-01-05 11:47:28 +00:00
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};
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2020-11-21 10:14:56 +00:00
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static void do_IRQ(struct pt_regs *regs, int irq)
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2013-06-27 07:01:09 +00:00
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{
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2016-10-27 10:41:39 +00:00
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if (tod_after_eq(S390_lowcore.int_clock,
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S390_lowcore.clock_comparator))
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2013-06-27 07:01:09 +00:00
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/* Serve timer interrupts first. */
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clock_comparator_work();
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generic_handle_irq(irq);
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2020-11-21 10:14:56 +00:00
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}
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static int on_async_stack(void)
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{
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unsigned long frame = current_frame_address();
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2021-07-05 18:57:49 +00:00
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return ((S390_lowcore.async_stack ^ frame) & ~(THREAD_SIZE - 1)) == 0;
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2020-11-21 10:14:56 +00:00
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}
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static void do_irq_async(struct pt_regs *regs, int irq)
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{
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2021-07-05 18:38:14 +00:00
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if (on_async_stack()) {
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2020-11-21 10:14:56 +00:00
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do_IRQ(regs, irq);
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2021-07-05 18:38:14 +00:00
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} else {
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call_on_stack(2, S390_lowcore.async_stack, void, do_IRQ,
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struct pt_regs *, regs, int, irq);
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}
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2020-11-21 10:14:56 +00:00
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}
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static int irq_pending(struct pt_regs *regs)
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{
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int cc;
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asm volatile("tpi 0\n"
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"ipm %0" : "=d" (cc) : : "cc");
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return cc >> 28;
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}
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void noinstr do_io_irq(struct pt_regs *regs)
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{
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irqentry_state_t state = irqentry_enter(regs);
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struct pt_regs *old_regs = set_irq_regs(regs);
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int from_idle;
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2021-12-06 10:50:16 +00:00
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irq_enter_rcu();
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2020-11-21 10:14:56 +00:00
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2021-04-07 07:20:17 +00:00
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if (user_mode(regs)) {
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2020-11-21 10:14:56 +00:00
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update_timer_sys();
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2021-04-07 07:20:17 +00:00
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if (static_branch_likely(&cpu_has_bear))
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current->thread.last_break = regs->last_break;
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}
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2020-11-21 10:14:56 +00:00
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from_idle = !user_mode(regs) && regs->psw.addr == (unsigned long)psw_idle_exit;
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if (from_idle)
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account_idle_time_irq();
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do {
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2021-05-10 19:10:18 +00:00
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regs->tpi_info = S390_lowcore.tpi_info;
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if (S390_lowcore.tpi_info.adapter_IO)
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2020-11-21 10:14:56 +00:00
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do_irq_async(regs, THIN_INTERRUPT);
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else
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do_irq_async(regs, IO_INTERRUPT);
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} while (MACHINE_IS_LPAR && irq_pending(regs));
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2021-12-06 10:50:16 +00:00
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irq_exit_rcu();
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2020-11-21 10:14:56 +00:00
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set_irq_regs(old_regs);
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irqentry_exit(regs, state);
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if (from_idle)
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regs->psw.mask &= ~(PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_WAIT);
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}
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void noinstr do_ext_irq(struct pt_regs *regs)
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{
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irqentry_state_t state = irqentry_enter(regs);
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struct pt_regs *old_regs = set_irq_regs(regs);
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int from_idle;
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2021-12-06 10:50:16 +00:00
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irq_enter_rcu();
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2020-11-21 10:14:56 +00:00
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2021-04-07 07:20:17 +00:00
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if (user_mode(regs)) {
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2020-11-21 10:14:56 +00:00
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update_timer_sys();
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2021-04-07 07:20:17 +00:00
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if (static_branch_likely(&cpu_has_bear))
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current->thread.last_break = regs->last_break;
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}
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2020-11-21 10:14:56 +00:00
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2021-05-05 20:01:11 +00:00
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regs->int_code = S390_lowcore.ext_int_code_addr;
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2020-11-21 10:14:56 +00:00
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regs->int_parm = S390_lowcore.ext_params;
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s390/irq: fix reading of ext_params2 field from lowcore
The contents of the ext_params2 field of the lowcore should just be
copied to the pt_regs structure, not dereferenced.
Fixes crashes / program check loops like this:
Krnl PSW : 0404c00180000000 00000000d6d02b3c (do_ext_irq+0x74/0x170)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
Krnl GPRS: 0000000000000000 80000000000b974e 00000000d71abee0 00000000d71abee0
0000000080030000 000000000000000f 0000000000000000 0000000000000000
0000000000000001 00000380000bf918 00000000d73ef780 00000380000bf518
0000000080348000 00000000d6d13350 00000000d6d02b1e 00000380000bf428
Krnl Code: 00000000d6d02b2e: 58100080 l %r1,128
00000000d6d02b32: 5010b0a4 st %r1,164(%r11)
#00000000d6d02b36: e31001b80104 lg %r1,4536
>00000000d6d02b3c: e31010000004 lg %r1,0(%r1)
00000000d6d02b42: e310b0a80024 stg %r1,168(%r11)
00000000d6d02b48: c01000242270 larl %r1,00000000d7187028
00000000d6d02b4e: d5071000b010 clc 0(8,%r1),16(%r11)
00000000d6d02b54: a784001b brc 8,00000000d6d02b8a
Call Trace:
[<00000000d6d02b3c>] do_ext_irq+0x74/0x170
[<00000000d6d0ea5c>] ext_int_handler+0xc4/0xf4
[<00000000d621d266>] die+0x106/0x188
[<00000000d62305b8>] do_no_context+0xc8/0x100
[<00000000d6d02790>] __do_pgm_check+0xe0/0x1f0
[<00000000d6d0e950>] pgm_check_handler+0x118/0x160
[<00000000d6d02b3c>] do_ext_irq+0x74/0x170
[<00000000d6d0ea5c>] ext_int_handler+0xc4/0xf4
[<00000000d621d266>] die+0x106/0x188
[<00000000d62305b8>] do_no_context+0xc8/0x100
[<00000000d6d02790>] __do_pgm_check+0xe0/0x1f0
[<00000000d6d0e950>] pgm_check_handler+0x118/0x160
[<00000000d6d02b3c>] do_ext_irq+0x74/0x170
[<00000000d6d0ea5c>] ext_int_handler+0xc4/0xf4
[<0000000000000000>] 0x0
[<00000000d6d0e57a>] default_idle_call+0x42/0x110
[<00000000d629856e>] do_idle+0xce/0x160
[<00000000d62987be>] cpu_startup_entry+0x36/0x40
[<00000000d621f2f2>] smp_start_secondary+0x82/0x88
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Fixes: 56e62a737028 ("s390: convert to generic entry")
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-04-03 10:15:13 +00:00
|
|
|
regs->int_parm_long = S390_lowcore.ext_params2;
|
2020-11-21 10:14:56 +00:00
|
|
|
|
|
|
|
from_idle = !user_mode(regs) && regs->psw.addr == (unsigned long)psw_idle_exit;
|
|
|
|
if (from_idle)
|
|
|
|
account_idle_time_irq();
|
|
|
|
|
|
|
|
do_irq_async(regs, EXT_INTERRUPT);
|
|
|
|
|
2021-12-06 10:50:16 +00:00
|
|
|
irq_exit_rcu();
|
2013-06-27 07:01:09 +00:00
|
|
|
set_irq_regs(old_regs);
|
2020-11-21 10:14:56 +00:00
|
|
|
irqentry_exit(regs, state);
|
|
|
|
|
|
|
|
if (from_idle)
|
|
|
|
regs->psw.mask &= ~(PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_WAIT);
|
2013-06-27 07:01:09 +00:00
|
|
|
}
|
|
|
|
|
2017-02-14 17:13:09 +00:00
|
|
|
static void show_msi_interrupt(struct seq_file *p, int irq)
|
|
|
|
{
|
|
|
|
struct irq_desc *desc;
|
|
|
|
unsigned long flags;
|
|
|
|
int cpu;
|
|
|
|
|
2022-04-22 10:02:12 +00:00
|
|
|
rcu_read_lock();
|
2017-02-14 17:13:09 +00:00
|
|
|
desc = irq_to_desc(irq);
|
|
|
|
if (!desc)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
raw_spin_lock_irqsave(&desc->lock, flags);
|
|
|
|
seq_printf(p, "%3d: ", irq);
|
|
|
|
for_each_online_cpu(cpu)
|
2020-12-10 19:25:48 +00:00
|
|
|
seq_printf(p, "%10u ", irq_desc_kstat_cpu(desc, cpu));
|
2017-02-14 17:13:09 +00:00
|
|
|
|
|
|
|
if (desc->irq_data.chip)
|
|
|
|
seq_printf(p, " %8s", desc->irq_data.chip->name);
|
|
|
|
|
|
|
|
if (desc->action)
|
|
|
|
seq_printf(p, " %s", desc->action->name);
|
|
|
|
|
|
|
|
seq_putc(p, '\n');
|
|
|
|
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
|
|
|
out:
|
2022-04-22 10:02:12 +00:00
|
|
|
rcu_read_unlock();
|
2017-02-14 17:13:09 +00:00
|
|
|
}
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* show_interrupts is needed by /proc/interrupts.
|
|
|
|
*/
|
|
|
|
int show_interrupts(struct seq_file *p, void *v)
|
|
|
|
{
|
2014-07-22 14:58:52 +00:00
|
|
|
int index = *(loff_t *) v;
|
|
|
|
int cpu, irq;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2021-08-03 14:15:47 +00:00
|
|
|
cpus_read_lock();
|
2014-07-22 14:58:52 +00:00
|
|
|
if (index == 0) {
|
2005-04-16 22:20:36 +00:00
|
|
|
seq_puts(p, " ");
|
2013-01-02 14:18:18 +00:00
|
|
|
for_each_online_cpu(cpu)
|
2017-02-14 17:13:09 +00:00
|
|
|
seq_printf(p, "CPU%-8d", cpu);
|
2005-04-16 22:20:36 +00:00
|
|
|
seq_putc(p, '\n');
|
|
|
|
}
|
2016-06-02 12:57:17 +00:00
|
|
|
if (index < NR_IRQS_BASE) {
|
2014-07-22 14:58:52 +00:00
|
|
|
seq_printf(p, "%s: ", irqclass_main_desc[index].name);
|
|
|
|
irq = irqclass_main_desc[index].irq;
|
2013-01-02 14:18:18 +00:00
|
|
|
for_each_online_cpu(cpu)
|
2013-06-27 07:01:09 +00:00
|
|
|
seq_printf(p, "%10u ", kstat_irqs_cpu(irq, cpu));
|
2013-01-02 14:18:18 +00:00
|
|
|
seq_putc(p, '\n');
|
2013-06-27 07:01:09 +00:00
|
|
|
goto out;
|
2013-01-02 14:18:18 +00:00
|
|
|
}
|
2017-02-14 17:13:09 +00:00
|
|
|
if (index < nr_irqs) {
|
|
|
|
show_msi_interrupt(p, index);
|
2016-06-02 12:57:17 +00:00
|
|
|
goto out;
|
2017-02-14 17:13:09 +00:00
|
|
|
}
|
2014-07-22 14:58:52 +00:00
|
|
|
for (index = 0; index < NR_ARCH_IRQS; index++) {
|
|
|
|
seq_printf(p, "%s: ", irqclass_sub_desc[index].name);
|
|
|
|
irq = irqclass_sub_desc[index].irq;
|
2013-01-02 14:18:18 +00:00
|
|
|
for_each_online_cpu(cpu)
|
2013-06-27 07:01:09 +00:00
|
|
|
seq_printf(p, "%10u ",
|
|
|
|
per_cpu(irq_stat, cpu).irqs[irq]);
|
2014-07-22 14:58:52 +00:00
|
|
|
if (irqclass_sub_desc[index].desc)
|
|
|
|
seq_printf(p, " %s", irqclass_sub_desc[index].desc);
|
2013-01-02 14:18:18 +00:00
|
|
|
seq_putc(p, '\n');
|
|
|
|
}
|
2013-06-27 07:01:09 +00:00
|
|
|
out:
|
2021-08-03 14:15:47 +00:00
|
|
|
cpus_read_unlock();
|
2013-01-02 14:18:18 +00:00
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2014-05-07 15:44:20 +00:00
|
|
|
unsigned int arch_dynirq_lower_bound(unsigned int from)
|
|
|
|
{
|
2014-11-14 10:01:37 +00:00
|
|
|
return from < NR_IRQS_BASE ? NR_IRQS_BASE : from;
|
2014-05-07 15:44:20 +00:00
|
|
|
}
|
|
|
|
|
2011-05-26 07:48:24 +00:00
|
|
|
/*
|
2011-07-24 08:48:27 +00:00
|
|
|
* ext_int_hash[index] is the list head for all external interrupts that hash
|
|
|
|
* to this index.
|
2011-05-26 07:48:24 +00:00
|
|
|
*/
|
2013-09-09 05:44:43 +00:00
|
|
|
static struct hlist_head ext_int_hash[32] ____cacheline_aligned;
|
2011-05-26 07:48:24 +00:00
|
|
|
|
|
|
|
struct ext_int_info {
|
|
|
|
ext_int_handler_t handler;
|
2013-09-03 12:12:07 +00:00
|
|
|
struct hlist_node entry;
|
2011-07-24 08:48:27 +00:00
|
|
|
struct rcu_head rcu;
|
2013-09-03 12:12:07 +00:00
|
|
|
u16 code;
|
2011-05-26 07:48:24 +00:00
|
|
|
};
|
|
|
|
|
2011-07-24 08:48:27 +00:00
|
|
|
/* ext_int_hash_lock protects the handler lists for external interrupts */
|
2013-09-06 17:10:48 +00:00
|
|
|
static DEFINE_SPINLOCK(ext_int_hash_lock);
|
2011-07-24 08:48:27 +00:00
|
|
|
|
2011-05-26 07:48:24 +00:00
|
|
|
static inline int ext_hash(u16 code)
|
|
|
|
{
|
2013-09-09 05:44:43 +00:00
|
|
|
BUILD_BUG_ON(!is_power_of_2(ARRAY_SIZE(ext_int_hash)));
|
|
|
|
|
|
|
|
return (code + (code >> 9)) & (ARRAY_SIZE(ext_int_hash) - 1);
|
2011-05-26 07:48:24 +00:00
|
|
|
}
|
|
|
|
|
2014-03-31 13:24:08 +00:00
|
|
|
int register_external_irq(u16 code, ext_int_handler_t handler)
|
2011-05-26 07:48:24 +00:00
|
|
|
{
|
|
|
|
struct ext_int_info *p;
|
2011-07-24 08:48:27 +00:00
|
|
|
unsigned long flags;
|
2011-05-26 07:48:24 +00:00
|
|
|
int index;
|
|
|
|
|
|
|
|
p = kmalloc(sizeof(*p), GFP_ATOMIC);
|
|
|
|
if (!p)
|
|
|
|
return -ENOMEM;
|
|
|
|
p->code = code;
|
|
|
|
p->handler = handler;
|
|
|
|
index = ext_hash(code);
|
2011-07-24 08:48:27 +00:00
|
|
|
|
|
|
|
spin_lock_irqsave(&ext_int_hash_lock, flags);
|
2013-09-03 12:12:07 +00:00
|
|
|
hlist_add_head_rcu(&p->entry, &ext_int_hash[index]);
|
2011-07-24 08:48:27 +00:00
|
|
|
spin_unlock_irqrestore(&ext_int_hash_lock, flags);
|
2011-05-26 07:48:24 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2014-03-31 13:24:08 +00:00
|
|
|
EXPORT_SYMBOL(register_external_irq);
|
2011-05-26 07:48:24 +00:00
|
|
|
|
2014-03-31 13:24:08 +00:00
|
|
|
int unregister_external_irq(u16 code, ext_int_handler_t handler)
|
2011-05-26 07:48:24 +00:00
|
|
|
{
|
2011-07-24 08:48:27 +00:00
|
|
|
struct ext_int_info *p;
|
|
|
|
unsigned long flags;
|
|
|
|
int index = ext_hash(code);
|
2011-05-26 07:48:24 +00:00
|
|
|
|
2011-07-24 08:48:27 +00:00
|
|
|
spin_lock_irqsave(&ext_int_hash_lock, flags);
|
2013-09-03 12:12:07 +00:00
|
|
|
hlist_for_each_entry_rcu(p, &ext_int_hash[index], entry) {
|
2011-07-24 08:48:27 +00:00
|
|
|
if (p->code == code && p->handler == handler) {
|
2013-09-03 12:12:07 +00:00
|
|
|
hlist_del_rcu(&p->entry);
|
2012-01-07 00:59:51 +00:00
|
|
|
kfree_rcu(p, rcu);
|
2011-07-24 08:48:27 +00:00
|
|
|
}
|
2012-04-11 12:28:09 +00:00
|
|
|
}
|
2011-07-24 08:48:27 +00:00
|
|
|
spin_unlock_irqrestore(&ext_int_hash_lock, flags);
|
2011-05-26 07:48:24 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2014-03-31 13:24:08 +00:00
|
|
|
EXPORT_SYMBOL(unregister_external_irq);
|
2011-05-26 07:48:24 +00:00
|
|
|
|
2013-06-27 07:01:09 +00:00
|
|
|
static irqreturn_t do_ext_interrupt(int irq, void *dummy)
|
2011-05-26 07:48:24 +00:00
|
|
|
{
|
2013-06-27 07:01:09 +00:00
|
|
|
struct pt_regs *regs = get_irq_regs();
|
2013-06-17 12:54:02 +00:00
|
|
|
struct ext_code ext_code;
|
2011-05-26 07:48:24 +00:00
|
|
|
struct ext_int_info *p;
|
|
|
|
int index;
|
|
|
|
|
2022-03-06 10:11:05 +00:00
|
|
|
ext_code.int_code = regs->int_code;
|
2014-03-31 13:24:08 +00:00
|
|
|
if (ext_code.code != EXT_IRQ_CLK_COMP)
|
2014-09-30 15:37:52 +00:00
|
|
|
set_cpu_flag(CIF_NOHZ_DELAY);
|
2011-07-24 08:48:27 +00:00
|
|
|
|
2012-03-11 15:59:31 +00:00
|
|
|
index = ext_hash(ext_code.code);
|
2011-07-24 08:48:27 +00:00
|
|
|
rcu_read_lock();
|
2013-09-03 12:12:07 +00:00
|
|
|
hlist_for_each_entry_rcu(p, &ext_int_hash[index], entry) {
|
|
|
|
if (unlikely(p->code != ext_code.code))
|
|
|
|
continue;
|
|
|
|
p->handler(ext_code, regs->int_parm, regs->int_parm_long);
|
|
|
|
}
|
2011-07-24 08:48:27 +00:00
|
|
|
rcu_read_unlock();
|
2013-06-27 07:01:09 +00:00
|
|
|
return IRQ_HANDLED;
|
2011-05-26 07:48:24 +00:00
|
|
|
}
|
|
|
|
|
2020-03-10 09:25:51 +00:00
|
|
|
static void __init init_ext_interrupts(void)
|
2011-07-24 08:48:27 +00:00
|
|
|
{
|
2013-06-27 07:01:09 +00:00
|
|
|
int idx;
|
|
|
|
|
|
|
|
for (idx = 0; idx < ARRAY_SIZE(ext_int_hash); idx++)
|
2013-09-03 12:12:07 +00:00
|
|
|
INIT_HLIST_HEAD(&ext_int_hash[idx]);
|
2013-06-27 07:01:09 +00:00
|
|
|
|
|
|
|
irq_set_chip_and_handler(EXT_INTERRUPT,
|
|
|
|
&dummy_irq_chip, handle_percpu_irq);
|
2020-03-04 00:50:48 +00:00
|
|
|
if (request_irq(EXT_INTERRUPT, do_ext_interrupt, 0, "EXT", NULL))
|
|
|
|
panic("Failed to register EXT interrupt\n");
|
2011-07-24 08:48:27 +00:00
|
|
|
}
|
|
|
|
|
2020-03-10 09:25:51 +00:00
|
|
|
void __init init_IRQ(void)
|
|
|
|
{
|
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(irqclass_sub_desc) != NR_ARCH_IRQS);
|
|
|
|
init_cio_interrupts();
|
|
|
|
init_airq_interrupts();
|
|
|
|
init_ext_interrupts();
|
|
|
|
}
|
|
|
|
|
2013-09-04 11:35:45 +00:00
|
|
|
static DEFINE_SPINLOCK(irq_subclass_lock);
|
|
|
|
static unsigned char irq_subclass_refcount[64];
|
2011-05-26 07:48:24 +00:00
|
|
|
|
2013-09-04 11:35:45 +00:00
|
|
|
void irq_subclass_register(enum irq_subclass subclass)
|
2011-05-26 07:48:24 +00:00
|
|
|
{
|
2013-09-04 11:35:45 +00:00
|
|
|
spin_lock(&irq_subclass_lock);
|
|
|
|
if (!irq_subclass_refcount[subclass])
|
|
|
|
ctl_set_bit(0, subclass);
|
|
|
|
irq_subclass_refcount[subclass]++;
|
|
|
|
spin_unlock(&irq_subclass_lock);
|
2011-05-26 07:48:24 +00:00
|
|
|
}
|
2013-09-04 11:35:45 +00:00
|
|
|
EXPORT_SYMBOL(irq_subclass_register);
|
2011-05-26 07:48:24 +00:00
|
|
|
|
2013-09-04 11:35:45 +00:00
|
|
|
void irq_subclass_unregister(enum irq_subclass subclass)
|
2011-05-26 07:48:24 +00:00
|
|
|
{
|
2013-09-04 11:35:45 +00:00
|
|
|
spin_lock(&irq_subclass_lock);
|
|
|
|
irq_subclass_refcount[subclass]--;
|
|
|
|
if (!irq_subclass_refcount[subclass])
|
|
|
|
ctl_clear_bit(0, subclass);
|
|
|
|
spin_unlock(&irq_subclass_lock);
|
2011-05-26 07:48:24 +00:00
|
|
|
}
|
2013-09-04 11:35:45 +00:00
|
|
|
EXPORT_SYMBOL(irq_subclass_unregister);
|