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linux-next/arch/alpha/kernel/err_ev6.c
Greg Kroah-Hartman b24413180f 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>
2017-11-02 11:10:55 +01:00

277 lines
7.8 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/alpha/kernel/err_ev6.c
*
* Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
*
* Error handling code supporting Alpha systems
*/
#include <linux/sched.h>
#include <asm/io.h>
#include <asm/irq_regs.h>
#include <asm/hwrpb.h>
#include <asm/smp.h>
#include <asm/err_common.h>
#include <asm/err_ev6.h>
#include "err_impl.h"
#include "proto.h"
static int
ev6_parse_ibox(u64 i_stat, int print)
{
int status = MCHK_DISPOSITION_REPORT;
#define EV6__I_STAT__PAR (1UL << 29)
#define EV6__I_STAT__ERRMASK (EV6__I_STAT__PAR)
if (!(i_stat & EV6__I_STAT__ERRMASK))
return MCHK_DISPOSITION_UNKNOWN_ERROR;
if (!print)
return status;
if (i_stat & EV6__I_STAT__PAR)
printk("%s Icache parity error\n", err_print_prefix);
return status;
}
static int
ev6_parse_mbox(u64 mm_stat, u64 d_stat, u64 c_stat, int print)
{
int status = MCHK_DISPOSITION_REPORT;
#define EV6__MM_STAT__DC_TAG_PERR (1UL << 10)
#define EV6__MM_STAT__ERRMASK (EV6__MM_STAT__DC_TAG_PERR)
#define EV6__D_STAT__TPERR_P0 (1UL << 0)
#define EV6__D_STAT__TPERR_P1 (1UL << 1)
#define EV6__D_STAT__ECC_ERR_ST (1UL << 2)
#define EV6__D_STAT__ECC_ERR_LD (1UL << 3)
#define EV6__D_STAT__SEO (1UL << 4)
#define EV6__D_STAT__ERRMASK (EV6__D_STAT__TPERR_P0 | \
EV6__D_STAT__TPERR_P1 | \
EV6__D_STAT__ECC_ERR_ST | \
EV6__D_STAT__ECC_ERR_LD | \
EV6__D_STAT__SEO)
if (!(d_stat & EV6__D_STAT__ERRMASK) &&
!(mm_stat & EV6__MM_STAT__ERRMASK))
return MCHK_DISPOSITION_UNKNOWN_ERROR;
if (!print)
return status;
if (mm_stat & EV6__MM_STAT__DC_TAG_PERR)
printk("%s Dcache tag parity error on probe\n",
err_print_prefix);
if (d_stat & EV6__D_STAT__TPERR_P0)
printk("%s Dcache tag parity error - pipe 0\n",
err_print_prefix);
if (d_stat & EV6__D_STAT__TPERR_P1)
printk("%s Dcache tag parity error - pipe 1\n",
err_print_prefix);
if (d_stat & EV6__D_STAT__ECC_ERR_ST)
printk("%s ECC error occurred on a store\n",
err_print_prefix);
if (d_stat & EV6__D_STAT__ECC_ERR_LD)
printk("%s ECC error occurred on a %s load\n",
err_print_prefix,
c_stat ? "" : "speculative ");
if (d_stat & EV6__D_STAT__SEO)
printk("%s Dcache second error\n", err_print_prefix);
return status;
}
static int
ev6_parse_cbox(u64 c_addr, u64 c1_syn, u64 c2_syn,
u64 c_stat, u64 c_sts, int print)
{
static const char * const sourcename[] = {
"UNKNOWN", "UNKNOWN", "UNKNOWN",
"MEMORY", "BCACHE", "DCACHE",
"BCACHE PROBE", "BCACHE PROBE"
};
static const char * const streamname[] = { "D", "I" };
static const char * const bitsname[] = { "SINGLE", "DOUBLE" };
int status = MCHK_DISPOSITION_REPORT;
int source = -1, stream = -1, bits = -1;
#define EV6__C_STAT__BC_PERR (0x01)
#define EV6__C_STAT__DC_PERR (0x02)
#define EV6__C_STAT__DSTREAM_MEM_ERR (0x03)
#define EV6__C_STAT__DSTREAM_BC_ERR (0x04)
#define EV6__C_STAT__DSTREAM_DC_ERR (0x05)
#define EV6__C_STAT__PROBE_BC_ERR0 (0x06) /* both 6 and 7 indicate... */
#define EV6__C_STAT__PROBE_BC_ERR1 (0x07) /* ...probe bc error. */
#define EV6__C_STAT__ISTREAM_MEM_ERR (0x0B)
#define EV6__C_STAT__ISTREAM_BC_ERR (0x0C)
#define EV6__C_STAT__DSTREAM_MEM_DBL (0x13)
#define EV6__C_STAT__DSTREAM_BC_DBL (0x14)
#define EV6__C_STAT__ISTREAM_MEM_DBL (0x1B)
#define EV6__C_STAT__ISTREAM_BC_DBL (0x1C)
#define EV6__C_STAT__SOURCE_MEMORY (0x03)
#define EV6__C_STAT__SOURCE_BCACHE (0x04)
#define EV6__C_STAT__SOURCE__S (0)
#define EV6__C_STAT__SOURCE__M (0x07)
#define EV6__C_STAT__ISTREAM__S (3)
#define EV6__C_STAT__ISTREAM__M (0x01)
#define EV6__C_STAT__DOUBLE__S (4)
#define EV6__C_STAT__DOUBLE__M (0x01)
#define EV6__C_STAT__ERRMASK (0x1F)
#define EV6__C_STS__SHARED (1 << 0)
#define EV6__C_STS__DIRTY (1 << 1)
#define EV6__C_STS__VALID (1 << 2)
#define EV6__C_STS__PARITY (1 << 3)
if (!(c_stat & EV6__C_STAT__ERRMASK))
return MCHK_DISPOSITION_UNKNOWN_ERROR;
if (!print)
return status;
source = EXTRACT(c_stat, EV6__C_STAT__SOURCE);
stream = EXTRACT(c_stat, EV6__C_STAT__ISTREAM);
bits = EXTRACT(c_stat, EV6__C_STAT__DOUBLE);
if (c_stat & EV6__C_STAT__BC_PERR) {
printk("%s Bcache tag parity error\n", err_print_prefix);
source = -1;
}
if (c_stat & EV6__C_STAT__DC_PERR) {
printk("%s Dcache tag parity error\n", err_print_prefix);
source = -1;
}
if (c_stat == EV6__C_STAT__PROBE_BC_ERR0 ||
c_stat == EV6__C_STAT__PROBE_BC_ERR1) {
printk("%s Bcache single-bit error on a probe hit\n",
err_print_prefix);
source = -1;
}
if (source != -1)
printk("%s %s-STREAM %s-BIT ECC error from %s\n",
err_print_prefix,
streamname[stream], bitsname[bits], sourcename[source]);
printk("%s Address: 0x%016llx\n"
" Syndrome[upper.lower]: %02llx.%02llx\n",
err_print_prefix,
c_addr,
c2_syn, c1_syn);
if (source == EV6__C_STAT__SOURCE_MEMORY ||
source == EV6__C_STAT__SOURCE_BCACHE)
printk("%s Block status: %s%s%s%s\n",
err_print_prefix,
(c_sts & EV6__C_STS__SHARED) ? "SHARED " : "",
(c_sts & EV6__C_STS__DIRTY) ? "DIRTY " : "",
(c_sts & EV6__C_STS__VALID) ? "VALID " : "",
(c_sts & EV6__C_STS__PARITY) ? "PARITY " : "");
return status;
}
void
ev6_register_error_handlers(void)
{
/* None right now. */
}
int
ev6_process_logout_frame(struct el_common *mchk_header, int print)
{
struct el_common_EV6_mcheck *ev6mchk =
(struct el_common_EV6_mcheck *)mchk_header;
int status = MCHK_DISPOSITION_UNKNOWN_ERROR;
status |= ev6_parse_ibox(ev6mchk->I_STAT, print);
status |= ev6_parse_mbox(ev6mchk->MM_STAT, ev6mchk->DC_STAT,
ev6mchk->C_STAT, print);
status |= ev6_parse_cbox(ev6mchk->C_ADDR, ev6mchk->DC1_SYNDROME,
ev6mchk->DC0_SYNDROME, ev6mchk->C_STAT,
ev6mchk->C_STS, print);
if (!print)
return status;
if (status != MCHK_DISPOSITION_DISMISS) {
char *saved_err_prefix = err_print_prefix;
/*
* Dump some additional information from the frame
*/
printk("%s EXC_ADDR: 0x%016lx IER_CM: 0x%016lx"
" ISUM: 0x%016lx\n"
" PAL_BASE: 0x%016lx I_CTL: 0x%016lx"
" PCTX: 0x%016lx\n",
err_print_prefix,
ev6mchk->EXC_ADDR, ev6mchk->IER_CM, ev6mchk->ISUM,
ev6mchk->PAL_BASE, ev6mchk->I_CTL, ev6mchk->PCTX);
if (status == MCHK_DISPOSITION_UNKNOWN_ERROR) {
printk("%s UNKNOWN error, frame follows:\n",
err_print_prefix);
} else {
/* had decode -- downgrade print level for frame */
err_print_prefix = KERN_NOTICE;
}
mchk_dump_logout_frame(mchk_header);
err_print_prefix = saved_err_prefix;
}
return status;
}
void
ev6_machine_check(unsigned long vector, unsigned long la_ptr)
{
struct el_common *mchk_header = (struct el_common *)la_ptr;
/*
* Sync the processor
*/
mb();
draina();
/*
* Parse the logout frame without printing first. If the only error(s)
* found are have a disposition of "dismiss", then just dismiss them
* and don't print any message
*/
if (ev6_process_logout_frame(mchk_header, 0) !=
MCHK_DISPOSITION_DISMISS) {
char *saved_err_prefix = err_print_prefix;
err_print_prefix = KERN_CRIT;
/*
* Either a nondismissable error was detected or no
* recognized error was detected in the logout frame
* -- report the error in either case
*/
printk("%s*CPU %s Error (Vector 0x%x) reported on CPU %d:\n",
err_print_prefix,
(vector == SCB_Q_PROCERR)?"Correctable":"Uncorrectable",
(unsigned int)vector, (int)smp_processor_id());
ev6_process_logout_frame(mchk_header, 1);
dik_show_regs(get_irq_regs(), NULL);
err_print_prefix = saved_err_prefix;
}
/*
* Release the logout frame
*/
wrmces(0x7);
mb();
}
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