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
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
2007-02-06 04:18:37 +08:00
|
|
|
/*
|
2009-06-16 16:30:52 +08:00
|
|
|
* Copyright IBM Corp. 2007, 2009
|
2007-02-06 04:18:37 +08:00
|
|
|
* Author(s): Hongjie Yang <hongjie@us.ibm.com>,
|
|
|
|
|
* Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
|
|
|
*/
|
|
|
|
|
|
2009-09-11 16:28:53 +08:00
|
|
|
#define KMSG_COMPONENT "setup"
|
|
|
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
|
|
[S390] Fix hypervisor detection for KVM
Currently we use the cpuid (via STIDP instruction) to recognize LPAR,
z/VM and KVM.
The architecture states, that bit 0-7 of STIDP returns all zero, and
if STIDP is executed in a virtual machine, the VM operating system
will replace bits 0-7 with FF.
KVM should not use FE to distinguish z/VM from KVM for interested
guests. The proper way to detect the hypervisor is the STSI (Store
System Information) instruction, which return information about the
hypervisors via function code 3, selector1=2, selector2=2.
This patch changes the detection routine of Linux to use STSI instead
of STIDP. This detection is earlier than bootmem, we have to use a
static buffer. Since STSI expects a 4kb block (4kb aligned) this
patch also changes the init.data alignment for s390. As this section
will be freed during boot, this should be no problem.
Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 22:23:58 +08:00
|
|
|
#include <linux/compiler.h>
|
2007-02-06 04:18:37 +08:00
|
|
|
#include <linux/init.h>
|
|
|
|
|
#include <linux/errno.h>
|
|
|
|
|
#include <linux/string.h>
|
|
|
|
|
#include <linux/ctype.h>
|
|
|
|
|
#include <linux/lockdep.h>
|
2016-09-20 05:54:56 +08:00
|
|
|
#include <linux/extable.h>
|
2007-02-06 04:18:37 +08:00
|
|
|
#include <linux/pfn.h>
|
|
|
|
|
#include <linux/uaccess.h>
|
2009-09-11 16:28:53 +08:00
|
|
|
#include <linux/kernel.h>
|
2015-08-20 23:28:44 +08:00
|
|
|
#include <asm/diag.h>
|
2008-07-14 15:59:09 +08:00
|
|
|
#include <asm/ebcdic.h>
|
2007-02-21 17:55:21 +08:00
|
|
|
#include <asm/ipl.h>
|
2007-02-06 04:18:37 +08:00
|
|
|
#include <asm/lowcore.h>
|
|
|
|
|
#include <asm/processor.h>
|
|
|
|
|
#include <asm/sections.h>
|
|
|
|
|
#include <asm/setup.h>
|
[S390] Fix hypervisor detection for KVM
Currently we use the cpuid (via STIDP instruction) to recognize LPAR,
z/VM and KVM.
The architecture states, that bit 0-7 of STIDP returns all zero, and
if STIDP is executed in a virtual machine, the VM operating system
will replace bits 0-7 with FF.
KVM should not use FE to distinguish z/VM from KVM for interested
guests. The proper way to detect the hypervisor is the STSI (Store
System Information) instruction, which return information about the
hypervisors via function code 3, selector1=2, selector2=2.
This patch changes the detection routine of Linux to use STSI instead
of STIDP. This detection is earlier than bootmem, we have to use a
static buffer. Since STSI expects a 4kb block (4kb aligned) this
patch also changes the init.data alignment for s390. As this section
will be freed during boot, this should be no problem.
Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 22:23:58 +08:00
|
|
|
#include <asm/sysinfo.h>
|
2007-02-06 04:18:37 +08:00
|
|
|
#include <asm/cpcmd.h>
|
|
|
|
|
#include <asm/sclp.h>
|
2012-03-29 01:30:02 +08:00
|
|
|
#include <asm/facility.h>
|
2018-05-15 19:28:53 +08:00
|
|
|
#include <asm/boot_data.h>
|
2019-11-14 21:08:28 +08:00
|
|
|
#include <asm/switch_to.h>
|
2008-04-17 13:46:26 +08:00
|
|
|
#include "entry.h"
|
2007-02-06 04:18:37 +08:00
|
|
|
|
2019-08-12 02:55:18 +08:00
|
|
|
static void __init reset_tod_clock(void)
|
|
|
|
|
{
|
2021-02-02 04:53:08 +08:00
|
|
|
char time[STORE_CLOCK_EXT_SIZE];
|
2019-08-12 02:55:18 +08:00
|
|
|
|
2021-02-02 04:53:08 +08:00
|
|
|
if (store_tod_clock_ext(time) == 0)
|
2019-08-12 02:55:18 +08:00
|
|
|
return;
|
|
|
|
|
/* TOD clock not running. Set the clock to Unix Epoch. */
|
2021-02-02 04:53:08 +08:00
|
|
|
if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock_ext(time) != 0)
|
2019-08-12 02:55:18 +08:00
|
|
|
disabled_wait();
|
|
|
|
|
|
|
|
|
|
memset(tod_clock_base, 0, 16);
|
|
|
|
|
*(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH;
|
|
|
|
|
S390_lowcore.last_update_clock = TOD_UNIX_EPOCH;
|
|
|
|
|
}
|
|
|
|
|
|
2007-02-06 04:18:37 +08:00
|
|
|
/*
|
|
|
|
|
* Initialize storage key for kernel pages
|
|
|
|
|
*/
|
|
|
|
|
static noinline __init void init_kernel_storage_key(void)
|
|
|
|
|
{
|
2013-10-07 18:12:32 +08:00
|
|
|
#if PAGE_DEFAULT_KEY
|
2007-02-06 04:18:37 +08:00
|
|
|
unsigned long end_pfn, init_pfn;
|
|
|
|
|
|
2018-02-20 20:28:33 +08:00
|
|
|
end_pfn = PFN_UP(__pa(_end));
|
2007-02-06 04:18:37 +08:00
|
|
|
|
|
|
|
|
for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++)
|
2010-10-25 22:10:14 +08:00
|
|
|
page_set_storage_key(init_pfn << PAGE_SHIFT,
|
|
|
|
|
PAGE_DEFAULT_KEY, 0);
|
2013-10-07 18:12:32 +08:00
|
|
|
#endif
|
2007-02-06 04:18:37 +08:00
|
|
|
}
|
|
|
|
|
|
2012-09-04 20:26:03 +08:00
|
|
|
static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE);
|
[S390] Fix hypervisor detection for KVM
Currently we use the cpuid (via STIDP instruction) to recognize LPAR,
z/VM and KVM.
The architecture states, that bit 0-7 of STIDP returns all zero, and
if STIDP is executed in a virtual machine, the VM operating system
will replace bits 0-7 with FF.
KVM should not use FE to distinguish z/VM from KVM for interested
guests. The proper way to detect the hypervisor is the STSI (Store
System Information) instruction, which return information about the
hypervisors via function code 3, selector1=2, selector2=2.
This patch changes the detection routine of Linux to use STSI instead
of STIDP. This detection is earlier than bootmem, we have to use a
static buffer. Since STSI expects a 4kb block (4kb aligned) this
patch also changes the init.data alignment for s390. As this section
will be freed during boot, this should be no problem.
Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 22:23:58 +08:00
|
|
|
|
2007-02-06 04:18:37 +08:00
|
|
|
static noinline __init void detect_machine_type(void)
|
|
|
|
|
{
|
2012-09-04 20:26:03 +08:00
|
|
|
struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page;
|
|
|
|
|
|
2010-02-27 05:37:38 +08:00
|
|
|
/* Check current-configuration-level */
|
2012-09-06 20:42:13 +08:00
|
|
|
if (stsi(NULL, 0, 0, 0) <= 2) {
|
2010-02-27 05:37:38 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR;
|
[S390] Fix hypervisor detection for KVM
Currently we use the cpuid (via STIDP instruction) to recognize LPAR,
z/VM and KVM.
The architecture states, that bit 0-7 of STIDP returns all zero, and
if STIDP is executed in a virtual machine, the VM operating system
will replace bits 0-7 with FF.
KVM should not use FE to distinguish z/VM from KVM for interested
guests. The proper way to detect the hypervisor is the STSI (Store
System Information) instruction, which return information about the
hypervisors via function code 3, selector1=2, selector2=2.
This patch changes the detection routine of Linux to use STSI instead
of STIDP. This detection is earlier than bootmem, we have to use a
static buffer. Since STSI expects a 4kb block (4kb aligned) this
patch also changes the init.data alignment for s390. As this section
will be freed during boot, this should be no problem.
Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 22:23:58 +08:00
|
|
|
return;
|
2010-02-27 05:37:38 +08:00
|
|
|
}
|
|
|
|
|
/* Get virtual-machine cpu information. */
|
2012-09-06 20:42:13 +08:00
|
|
|
if (stsi(vmms, 3, 2, 2) || !vmms->count)
|
[S390] Fix hypervisor detection for KVM
Currently we use the cpuid (via STIDP instruction) to recognize LPAR,
z/VM and KVM.
The architecture states, that bit 0-7 of STIDP returns all zero, and
if STIDP is executed in a virtual machine, the VM operating system
will replace bits 0-7 with FF.
KVM should not use FE to distinguish z/VM from KVM for interested
guests. The proper way to detect the hypervisor is the STSI (Store
System Information) instruction, which return information about the
hypervisors via function code 3, selector1=2, selector2=2.
This patch changes the detection routine of Linux to use STSI instead
of STIDP. This detection is earlier than bootmem, we have to use a
static buffer. Since STSI expects a 4kb block (4kb aligned) this
patch also changes the init.data alignment for s390. As this section
will be freed during boot, this should be no problem.
Patch is tested with LPAR, z/VM, KVM on LPAR, and KVM under z/VM.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-03-26 22:23:58 +08:00
|
|
|
return;
|
2007-02-06 04:18:37 +08:00
|
|
|
|
2018-11-09 16:21:47 +08:00
|
|
|
/* Detect known hypervisors */
|
2012-09-04 20:26:03 +08:00
|
|
|
if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3))
|
2009-09-11 16:28:45 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_KVM;
|
2018-11-09 16:21:47 +08:00
|
|
|
else if (!memcmp(vmms->vm[0].cpi, "\xa9\x61\xe5\xd4", 4))
|
2009-09-11 16:28:45 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_VM;
|
2007-02-06 04:18:37 +08:00
|
|
|
}
|
|
|
|
|
|
2017-03-11 18:58:27 +08:00
|
|
|
/* Remove leading, trailing and double whitespace. */
|
|
|
|
|
static inline void strim_all(char *str)
|
|
|
|
|
{
|
|
|
|
|
char *s;
|
|
|
|
|
|
|
|
|
|
s = strim(str);
|
|
|
|
|
if (s != str)
|
|
|
|
|
memmove(str, s, strlen(s));
|
|
|
|
|
while (*str) {
|
|
|
|
|
if (!isspace(*str++))
|
|
|
|
|
continue;
|
|
|
|
|
if (isspace(*str)) {
|
|
|
|
|
s = skip_spaces(str);
|
|
|
|
|
memmove(str, s, strlen(s) + 1);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2016-05-24 21:23:20 +08:00
|
|
|
static noinline __init void setup_arch_string(void)
|
|
|
|
|
{
|
|
|
|
|
struct sysinfo_1_1_1 *mach = (struct sysinfo_1_1_1 *)&sysinfo_page;
|
2017-03-11 19:22:11 +08:00
|
|
|
struct sysinfo_3_2_2 *vm = (struct sysinfo_3_2_2 *)&sysinfo_page;
|
|
|
|
|
char mstr[80], hvstr[17];
|
2016-05-24 21:23:20 +08:00
|
|
|
|
|
|
|
|
if (stsi(mach, 1, 1, 1))
|
|
|
|
|
return;
|
|
|
|
|
EBCASC(mach->manufacturer, sizeof(mach->manufacturer));
|
|
|
|
|
EBCASC(mach->type, sizeof(mach->type));
|
|
|
|
|
EBCASC(mach->model, sizeof(mach->model));
|
|
|
|
|
EBCASC(mach->model_capacity, sizeof(mach->model_capacity));
|
2017-03-11 18:58:27 +08:00
|
|
|
sprintf(mstr, "%-16.16s %-4.4s %-16.16s %-16.16s",
|
|
|
|
|
mach->manufacturer, mach->type,
|
|
|
|
|
mach->model, mach->model_capacity);
|
|
|
|
|
strim_all(mstr);
|
2017-03-11 19:22:11 +08:00
|
|
|
if (stsi(vm, 3, 2, 2) == 0 && vm->count) {
|
|
|
|
|
EBCASC(vm->vm[0].cpi, sizeof(vm->vm[0].cpi));
|
|
|
|
|
sprintf(hvstr, "%-16.16s", vm->vm[0].cpi);
|
|
|
|
|
strim_all(hvstr);
|
|
|
|
|
} else {
|
|
|
|
|
sprintf(hvstr, "%s",
|
|
|
|
|
MACHINE_IS_LPAR ? "LPAR" :
|
|
|
|
|
MACHINE_IS_VM ? "z/VM" :
|
|
|
|
|
MACHINE_IS_KVM ? "KVM" : "unknown");
|
|
|
|
|
}
|
|
|
|
|
dump_stack_set_arch_desc("%s (%s)", mstr, hvstr);
|
2016-05-24 21:23:20 +08:00
|
|
|
}
|
|
|
|
|
|
2012-09-04 20:26:03 +08:00
|
|
|
static __init void setup_topology(void)
|
|
|
|
|
{
|
|
|
|
|
int max_mnest;
|
|
|
|
|
|
|
|
|
|
if (!test_facility(11))
|
|
|
|
|
return;
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
|
|
|
|
|
for (max_mnest = 6; max_mnest > 1; max_mnest--) {
|
2012-09-06 20:42:13 +08:00
|
|
|
if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0)
|
2012-09-04 20:26:03 +08:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
topology_max_mnest = max_mnest;
|
|
|
|
|
}
|
|
|
|
|
|
2012-05-22 00:11:29 +08:00
|
|
|
static void early_pgm_check_handler(void)
|
2007-02-06 04:18:37 +08:00
|
|
|
{
|
|
|
|
|
const struct exception_table_entry *fixup;
|
2014-01-30 01:16:01 +08:00
|
|
|
unsigned long cr0, cr0_new;
|
2012-09-05 19:26:11 +08:00
|
|
|
unsigned long addr;
|
2007-02-06 04:18:37 +08:00
|
|
|
|
|
|
|
|
addr = S390_lowcore.program_old_psw.addr;
|
2019-02-04 04:37:20 +08:00
|
|
|
fixup = s390_search_extables(addr);
|
2007-02-06 04:18:37 +08:00
|
|
|
if (!fixup)
|
2019-04-30 18:33:45 +08:00
|
|
|
disabled_wait();
|
2014-01-30 01:16:01 +08:00
|
|
|
/* Disable low address protection before storing into lowcore. */
|
|
|
|
|
__ctl_store(cr0, 0, 0);
|
|
|
|
|
cr0_new = cr0 & ~(1UL << 28);
|
|
|
|
|
__ctl_load(cr0_new, 0, 0);
|
2016-01-18 19:49:44 +08:00
|
|
|
S390_lowcore.program_old_psw.addr = extable_fixup(fixup);
|
2014-01-30 01:16:01 +08:00
|
|
|
__ctl_load(cr0, 0, 0);
|
2007-02-06 04:18:37 +08:00
|
|
|
}
|
|
|
|
|
|
2009-07-24 18:39:49 +08:00
|
|
|
static noinline __init void setup_lowcore_early(void)
|
2007-02-06 04:18:37 +08:00
|
|
|
{
|
|
|
|
|
psw_t psw;
|
|
|
|
|
|
2020-09-24 23:12:08 +08:00
|
|
|
psw.addr = (unsigned long)s390_base_pgm_handler;
|
2011-10-30 22:16:50 +08:00
|
|
|
psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA;
|
2020-06-17 21:05:49 +08:00
|
|
|
if (IS_ENABLED(CONFIG_KASAN))
|
|
|
|
|
psw.mask |= PSW_MASK_DAT;
|
2007-02-06 04:18:37 +08:00
|
|
|
S390_lowcore.program_new_psw = psw;
|
|
|
|
|
s390_base_pgm_handler_fn = early_pgm_check_handler;
|
2016-10-25 18:21:44 +08:00
|
|
|
S390_lowcore.preempt_count = INIT_PREEMPT_COUNT;
|
2007-02-06 04:18:37 +08:00
|
|
|
}
|
|
|
|
|
|
2010-10-25 22:10:51 +08:00
|
|
|
static noinline __init void setup_facility_list(void)
|
|
|
|
|
{
|
2018-01-16 14:03:44 +08:00
|
|
|
memcpy(S390_lowcore.alt_stfle_fac_list,
|
|
|
|
|
S390_lowcore.stfle_fac_list,
|
|
|
|
|
sizeof(S390_lowcore.alt_stfle_fac_list));
|
2018-01-16 14:11:45 +08:00
|
|
|
if (!IS_ENABLED(CONFIG_KERNEL_NOBP))
|
|
|
|
|
__clear_facility(82, S390_lowcore.alt_stfle_fac_list);
|
2010-10-25 22:10:51 +08:00
|
|
|
}
|
|
|
|
|
|
2008-04-30 19:38:45 +08:00
|
|
|
static __init void detect_diag9c(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned int cpu_address;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
cpu_address = stap();
|
2015-08-20 23:28:44 +08:00
|
|
|
diag_stat_inc(DIAG_STAT_X09C);
|
2008-04-30 19:38:45 +08:00
|
|
|
asm volatile(
|
|
|
|
|
" diag %2,0,0x9c\n"
|
|
|
|
|
"0: la %0,0\n"
|
|
|
|
|
"1:\n"
|
|
|
|
|
EX_TABLE(0b,1b)
|
|
|
|
|
: "=d" (rc) : "0" (-EOPNOTSUPP), "d" (cpu_address) : "cc");
|
|
|
|
|
if (!rc)
|
2009-09-11 16:28:45 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_DIAG9C;
|
2008-04-30 19:38:45 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __init void detect_machine_facilities(void)
|
|
|
|
|
{
|
2012-09-28 21:06:41 +08:00
|
|
|
if (test_facility(8)) {
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1;
|
|
|
|
|
__ctl_set_bit(0, 23);
|
|
|
|
|
}
|
2012-09-27 16:45:06 +08:00
|
|
|
if (test_facility(78))
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2;
|
2010-10-25 22:10:51 +08:00
|
|
|
if (test_facility(3))
|
2009-09-11 16:28:45 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
|
s390: fix transactional execution control register handling
Dan Horák reported the following crash related to transactional execution:
User process fault: interruption code 0013 ilc:3 in libpthread-2.26.so[3ff93c00000+1b000]
CPU: 2 PID: 1 Comm: /init Not tainted 4.13.4-300.fc27.s390x #1
Hardware name: IBM 2827 H43 400 (z/VM 6.4.0)
task: 00000000fafc8000 task.stack: 00000000fafc4000
User PSW : 0705200180000000 000003ff93c14e70
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 RI:0 EA:3
User GPRS: 0000000000000077 000003ff00000000 000003ff93144d48 000003ff93144d5e
0000000000000000 0000000000000002 0000000000000000 000003ff00000000
0000000000000000 0000000000000418 0000000000000000 000003ffcc9fe770
000003ff93d28f50 000003ff9310acf0 000003ff92b0319a 000003ffcc9fe6d0
User Code: 000003ff93c14e62: 60e0b030 std %f14,48(%r11)
000003ff93c14e66: 60f0b038 std %f15,56(%r11)
#000003ff93c14e6a: e5600000ff0e tbegin 0,65294
>000003ff93c14e70: a7740006 brc 7,3ff93c14e7c
000003ff93c14e74: a7080000 lhi %r0,0
000003ff93c14e78: a7f40023 brc 15,3ff93c14ebe
000003ff93c14e7c: b2220000 ipm %r0
000003ff93c14e80: 8800001c srl %r0,28
There are several bugs with control register handling with respect to
transactional execution:
- on task switch update_per_regs() is only called if the next task has
an mm (is not a kernel thread). This however is incorrect. This
breaks e.g. for user mode helper handling, where the kernel creates
a kernel thread and then execve's a user space program. Control
register contents related to transactional execution won't be
updated on execve. If the previous task ran with transactional
execution disabled then the new task will also run with
transactional execution disabled, which is incorrect. Therefore call
update_per_regs() unconditionally within switch_to().
- on startup the transactional execution facility is not enabled for
the idle thread. This is not really a bug, but an inconsistency to
other facilities. Therefore enable the facility if it is available.
- on fork the new thread's per_flags field is not cleared. This means
that a child process inherits the PER_FLAG_NO_TE flag. This flag can
be set with a ptrace request to disable transactional execution for
the current process. It should not be inherited by new child
processes in order to be consistent with the handling of all other
PER related debugging options. Therefore clear the per_flags field in
copy_thread_tls().
Reported-and-tested-by: Dan Horák <dan@danny.cz>
Fixes: d35339a42dd1 ("s390: add support for transactional memory")
Cc: <stable@vger.kernel.org> # v3.7+
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2017-11-09 19:29:34 +08:00
|
|
|
if (test_facility(50) && test_facility(73)) {
|
2012-07-31 17:03:04 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_TE;
|
s390: fix transactional execution control register handling
Dan Horák reported the following crash related to transactional execution:
User process fault: interruption code 0013 ilc:3 in libpthread-2.26.so[3ff93c00000+1b000]
CPU: 2 PID: 1 Comm: /init Not tainted 4.13.4-300.fc27.s390x #1
Hardware name: IBM 2827 H43 400 (z/VM 6.4.0)
task: 00000000fafc8000 task.stack: 00000000fafc4000
User PSW : 0705200180000000 000003ff93c14e70
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:1 AS:0 CC:2 PM:0 RI:0 EA:3
User GPRS: 0000000000000077 000003ff00000000 000003ff93144d48 000003ff93144d5e
0000000000000000 0000000000000002 0000000000000000 000003ff00000000
0000000000000000 0000000000000418 0000000000000000 000003ffcc9fe770
000003ff93d28f50 000003ff9310acf0 000003ff92b0319a 000003ffcc9fe6d0
User Code: 000003ff93c14e62: 60e0b030 std %f14,48(%r11)
000003ff93c14e66: 60f0b038 std %f15,56(%r11)
#000003ff93c14e6a: e5600000ff0e tbegin 0,65294
>000003ff93c14e70: a7740006 brc 7,3ff93c14e7c
000003ff93c14e74: a7080000 lhi %r0,0
000003ff93c14e78: a7f40023 brc 15,3ff93c14ebe
000003ff93c14e7c: b2220000 ipm %r0
000003ff93c14e80: 8800001c srl %r0,28
There are several bugs with control register handling with respect to
transactional execution:
- on task switch update_per_regs() is only called if the next task has
an mm (is not a kernel thread). This however is incorrect. This
breaks e.g. for user mode helper handling, where the kernel creates
a kernel thread and then execve's a user space program. Control
register contents related to transactional execution won't be
updated on execve. If the previous task ran with transactional
execution disabled then the new task will also run with
transactional execution disabled, which is incorrect. Therefore call
update_per_regs() unconditionally within switch_to().
- on startup the transactional execution facility is not enabled for
the idle thread. This is not really a bug, but an inconsistency to
other facilities. Therefore enable the facility if it is available.
- on fork the new thread's per_flags field is not cleared. This means
that a child process inherits the PER_FLAG_NO_TE flag. This flag can
be set with a ptrace request to disable transactional execution for
the current process. It should not be inherited by new child
processes in order to be consistent with the handling of all other
PER related debugging options. Therefore clear the per_flags field in
copy_thread_tls().
Reported-and-tested-by: Dan Horák <dan@danny.cz>
Fixes: d35339a42dd1 ("s390: add support for transactional memory")
Cc: <stable@vger.kernel.org> # v3.7+
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2017-11-09 19:29:34 +08:00
|
|
|
__ctl_set_bit(0, 55);
|
|
|
|
|
}
|
2014-04-03 19:55:01 +08:00
|
|
|
if (test_facility(51))
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC;
|
2015-09-29 16:04:41 +08:00
|
|
|
if (test_facility(129)) {
|
2014-10-06 23:53:53 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_VX;
|
2015-09-29 16:04:41 +08:00
|
|
|
__ctl_set_bit(0, 17);
|
|
|
|
|
}
|
2019-10-22 23:37:51 +08:00
|
|
|
if (test_facility(130) && !noexec_disabled) {
|
2016-03-22 17:54:24 +08:00
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_NX;
|
|
|
|
|
__ctl_set_bit(0, 20);
|
|
|
|
|
}
|
2016-01-26 21:10:34 +08:00
|
|
|
if (test_facility(133))
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_GS;
|
2016-10-27 18:41:39 +08:00
|
|
|
if (test_facility(139) && (tod_clock_base[1] & 0x80)) {
|
|
|
|
|
/* Enabled signed clock comparator comparisons */
|
|
|
|
|
S390_lowcore.machine_flags |= MACHINE_FLAG_SCC;
|
|
|
|
|
clock_comparator_max = -1ULL >> 1;
|
|
|
|
|
__ctl_set_bit(0, 53);
|
|
|
|
|
}
|
2015-09-29 16:04:41 +08:00
|
|
|
}
|
|
|
|
|
|
2015-10-29 17:28:26 +08:00
|
|
|
static inline void save_vector_registers(void)
|
|
|
|
|
{
|
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
|
|
|
if (test_facility(129))
|
|
|
|
|
save_vx_regs(boot_cpu_vector_save_area);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
2019-11-13 00:35:28 +08:00
|
|
|
static inline void setup_control_registers(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned long reg;
|
|
|
|
|
|
|
|
|
|
__ctl_store(reg, 0, 0);
|
|
|
|
|
reg |= CR0_LOW_ADDRESS_PROTECTION;
|
|
|
|
|
reg |= CR0_EMERGENCY_SIGNAL_SUBMASK;
|
|
|
|
|
reg |= CR0_EXTERNAL_CALL_SUBMASK;
|
|
|
|
|
__ctl_load(reg, 0, 0);
|
|
|
|
|
}
|
|
|
|
|
|
2019-11-14 21:08:28 +08:00
|
|
|
static inline void setup_access_registers(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned int acrs[NUM_ACRS] = { 0 };
|
|
|
|
|
|
|
|
|
|
restore_access_regs(acrs);
|
|
|
|
|
}
|
|
|
|
|
|
2015-09-29 16:04:41 +08:00
|
|
|
static int __init disable_vector_extension(char *str)
|
|
|
|
|
{
|
|
|
|
|
S390_lowcore.machine_flags &= ~MACHINE_FLAG_VX;
|
|
|
|
|
__ctl_clear_bit(0, 17);
|
2017-08-11 21:54:16 +08:00
|
|
|
return 0;
|
2008-04-30 19:38:45 +08:00
|
|
|
}
|
2015-09-29 16:04:41 +08:00
|
|
|
early_param("novx", disable_vector_extension);
|
2008-04-30 19:38:45 +08:00
|
|
|
|
2018-05-15 19:28:53 +08:00
|
|
|
char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
|
2011-12-27 18:25:46 +08:00
|
|
|
static void __init setup_boot_command_line(void)
|
|
|
|
|
{
|
2008-07-14 15:59:09 +08:00
|
|
|
/* copy arch command line */
|
2018-05-15 19:28:53 +08:00
|
|
|
strlcpy(boot_command_line, early_command_line, ARCH_COMMAND_LINE_SIZE);
|
2008-07-14 15:59:09 +08:00
|
|
|
}
|
|
|
|
|
|
2018-06-25 19:59:35 +08:00
|
|
|
static void __init check_image_bootable(void)
|
|
|
|
|
{
|
|
|
|
|
if (!memcmp(EP_STRING, (void *)EP_OFFSET, strlen(EP_STRING)))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
sclp_early_printk("Linux kernel boot failure: An attempt to boot a vmlinux ELF image failed.\n");
|
|
|
|
|
sclp_early_printk("This image does not contain all parts necessary for starting up. Use\n");
|
|
|
|
|
sclp_early_printk("bzImage or arch/s390/boot/compressed/vmlinux instead.\n");
|
2019-04-30 18:33:45 +08:00
|
|
|
disabled_wait();
|
2018-06-25 19:59:35 +08:00
|
|
|
}
|
|
|
|
|
|
2007-02-06 04:18:37 +08:00
|
|
|
void __init startup_init(void)
|
|
|
|
|
{
|
2019-08-12 02:55:18 +08:00
|
|
|
reset_tod_clock();
|
2018-06-25 19:59:35 +08:00
|
|
|
check_image_bootable();
|
2016-10-10 15:43:41 +08:00
|
|
|
time_early_init();
|
2007-02-06 04:18:37 +08:00
|
|
|
init_kernel_storage_key();
|
|
|
|
|
lockdep_off();
|
|
|
|
|
setup_lowcore_early();
|
2010-10-25 22:10:51 +08:00
|
|
|
setup_facility_list();
|
2008-07-14 15:59:09 +08:00
|
|
|
detect_machine_type();
|
2016-05-24 21:23:20 +08:00
|
|
|
setup_arch_string();
|
2008-07-14 15:59:09 +08:00
|
|
|
setup_boot_command_line();
|
2008-04-30 19:38:45 +08:00
|
|
|
detect_diag9c();
|
|
|
|
|
detect_machine_facilities();
|
2015-10-29 17:28:26 +08:00
|
|
|
save_vector_registers();
|
2012-09-04 20:26:03 +08:00
|
|
|
setup_topology();
|
2013-11-13 17:38:27 +08:00
|
|
|
sclp_early_detect();
|
2019-11-13 00:35:28 +08:00
|
|
|
setup_control_registers();
|
2019-11-14 21:08:28 +08:00
|
|
|
setup_access_registers();
|
2007-02-06 04:18:37 +08:00
|
|
|
lockdep_on();
|
|
|
|
|
}
|