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OpenCloudOS-Kernel/arch/ia64/kernel/traps.c

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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
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Architecture-specific trap handling.
*
* Copyright (C) 1998-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
*
* 05/12/00 grao <goutham.rao@intel.com> : added isr in siginfo for SIGFPE
*/
#include <linux/kernel.h>
#include <linux/init.h>
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-09 01:51:30 +08:00
#include <linux/sched/signal.h>
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/debug.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-09 01:51:35 +08:00
#include <linux/sched/debug.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/tty.h>
#include <linux/vt_kern.h> /* For unblank_screen() */
ia64: ensure exception table search users include extable.h We start with a delete of a duplicate prototype in asm/exception.h that no longer needs to exist, as it duplicates content in extable.h and since that header is so small, there is no point trying to avoid using it. Then we make sure anyone using search_exception_tables directly or via the ia64_done_with_exception macro has included extable.h In the process, we remove an include of moduleloader.h that was apparently not really required; it would have been fetching in module.h and hence the previous location of the exception search function prototypes, but we need not rely on that anymore. Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2016-07-24 02:01:45 +08:00
#include <linux/export.h>
#include <linux/extable.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/hardirq.h>
[PATCH] Kprobes: prevent possible race conditions ia64 changes This patch contains the ia64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 06:19:30 +08:00
#include <linux/kprobes.h>
[IA64] support panic_on_oops sysctl Trivial port of this feature from i386 As it stands, panic_on_oops but does nothing on ia64 Signed-Off-By: Horms <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 16:23:09 +08:00
#include <linux/delay.h> /* for ssleep() */
move die notifier handling to common code This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 15:27:03 +08:00
#include <linux/kdebug.h>
ia64: move ia64_done_with_exception out of asm/uaccess.h Move ia64_done_with_exception out of asm/uaccess.h (which is widely used) and into asm/exception.h (like ARM has) and then ensure the few callers of it include this new header. Most of the other C content in asm files is implemented in macro form. So we do that conversion at the same time as the move. There are two C exception prototypes that move along with the macro. One of them will become redundant when we switch over to using the <linux/extable.h> instead of <linux/module.h> header in a subsequent commit. Also relocate a couple of the automated asm --> linux uaccess conversions to preserve the linux and asm independent grouping, since we are in the file at that location anyway. Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2016-09-20 06:28:25 +08:00
#include <linux/uaccess.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <asm/fpswa.h>
#include <asm/intrinsics.h>
#include <asm/processor.h>
ia64: move ia64_done_with_exception out of asm/uaccess.h Move ia64_done_with_exception out of asm/uaccess.h (which is widely used) and into asm/exception.h (like ARM has) and then ensure the few callers of it include this new header. Most of the other C content in asm files is implemented in macro form. So we do that conversion at the same time as the move. There are two C exception prototypes that move along with the macro. One of them will become redundant when we switch over to using the <linux/extable.h> instead of <linux/module.h> header in a subsequent commit. Also relocate a couple of the automated asm --> linux uaccess conversions to preserve the linux and asm independent grouping, since we are in the file at that location anyway. Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2016-09-20 06:28:25 +08:00
#include <asm/exception.h>
Disintegrate asm/system.h for IA64 Disintegrate asm/system.h for IA64. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Tony Luck <tony.luck@intel.com> cc: linux-ia64@vger.kernel.org
2012-03-29 01:30:02 +08:00
#include <asm/setup.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
fpswa_interface_t *fpswa_interface;
EXPORT_SYMBOL(fpswa_interface);
void __init
trap_init (void)
{
if (ia64_boot_param->fpswa)
/* FPSWA fixup: make the interface pointer a kernel virtual address: */
fpswa_interface = __va(ia64_boot_param->fpswa);
}
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
int
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
die (const char *str, struct pt_regs *regs, long err)
{
static struct {
spinlock_t lock;
u32 lock_owner;
int lock_owner_depth;
} die = {
[IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64 SPIN_LOCK_UNLOCKED macro cleanup, use __SPIN_LOCK_UNLOCKED instead. Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-04-16 01:21:23 +08:00
.lock = __SPIN_LOCK_UNLOCKED(die.lock),
.lock_owner = -1,
.lock_owner_depth = 0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
};
static int die_counter;
[IA64] Make ia64 die() preempt safe Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-02 14:27:00 +08:00
int cpu = get_cpu();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[IA64] Make ia64 die() preempt safe Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-02 14:27:00 +08:00
if (die.lock_owner != cpu) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
console_verbose();
spin_lock_irq(&die.lock);
[IA64] Make ia64 die() preempt safe Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-02 14:27:00 +08:00
die.lock_owner = cpu;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
die.lock_owner_depth = 0;
bust_spinlocks(1);
}
[IA64] Make ia64 die() preempt safe Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-02 14:27:00 +08:00
put_cpu();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (++die.lock_owner_depth < 3) {
printk("%s[%d]: %s %ld [%d]\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 14:40:41 +08:00
current->comm, task_pid_nr(current), str, err, ++die_counter);
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
if (notify_die(DIE_OOPS, str, regs, err, 255, SIGSEGV)
!= NOTIFY_STOP)
show_regs(regs);
else
regs = NULL;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else
printk(KERN_ERR "Recursive die() failure, output suppressed\n");
bust_spinlocks(0);
die.lock_owner = -1;
taint: add explicit flag to show whether lock dep is still OK. Fix up all callers as they were before, with make one change: an unsigned module taints the kernel, but doesn't turn off lockdep. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2013-01-21 14:47:39 +08:00
add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
spin_unlock_irq(&die.lock);
[IA64] support panic_on_oops sysctl Trivial port of this feature from i386 As it stands, panic_on_oops but does nothing on ia64 Signed-Off-By: Horms <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 16:23:09 +08:00
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
if (!regs)
return 1;
[PATCH] panic_on_oops: remove ssleep() This patch is part of an effort to unify the panic_on_oops behaviour across all architectures that implement it. It was pointed out to me by Andi Kleen that if an oops has occured in interrupt context, then calling sleep() in the oops path will only cause a panic, and that it would be really better for it not to be in the path at all. This patch removes the ssleep() call and reworks the console message accordinly. I have a slght concern that the resulting console message is too long, feedback welcome. For powerpc it also unifies the 32bit and 64bit behaviour. Fror x86_64, this patch only updates the console message, as ssleep() is already not present. Signed-off-by: Horms <horms@verge.net.au> Acked-by: Paul Mackerras <paulus@samba.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-30 18:03:34 +08:00
if (panic_on_oops)
[PATCH] Change panic_on_oops message to "Fatal exception" Previously the message was "Fatal exception: panic_on_oops", as introduced in a recent patch whith removed a somewhat dangerous call to ssleep() in the panic_on_oops path. However, Paul Mackerras suggested that this was somewhat confusing, leadind people to believe that it was panic_on_oops that was the root cause of the fatal exception. On his suggestion, this patch changes the message to simply "Fatal exception". A suitable oops message should already have been displayed. Signed-off-by: Simon Horman <horms@verge.net.au> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-08-14 14:24:22 +08:00
panic("Fatal exception");
[IA64] support panic_on_oops sysctl Trivial port of this feature from i386 As it stands, panic_on_oops but does nothing on ia64 Signed-Off-By: Horms <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 16:23:09 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
do_exit(SIGSEGV);
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
int
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
die_if_kernel (char *str, struct pt_regs *regs, long err)
{
if (!user_mode(regs))
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
return die(str, regs, err);
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
void
[PATCH] Kprobes: prevent possible race conditions ia64 changes This patch contains the ia64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 06:19:30 +08:00
__kprobes ia64_bad_break (unsigned long break_num, struct pt_regs *regs)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
int sig, code;
switch (break_num) {
case 0: /* unknown error (used by GCC for __builtin_abort()) */
[PATCH] Kprobes/IA64: kdebug die notification mechanism As many of you know that kprobes exist in the main line kernel for various architecture including i386, x86_64, ppc64 and sparc64. Attached patches following this mail are a port of Kprobes and Jprobes for IA64. I have tesed this patches for kprobes and Jprobes and this seems to work fine. I have tested this patch by inserting kprobes on various slots and various templates including various types of branch instructions. I have also tested this patch using the tool http://marc.theaimsgroup.com/?l=linux-kernel&m=111657358022586&w=2 and the kprobes for IA64 works great. Here is list of TODO things and pathes for the same will appear soon. 1) Support kprobes on "mov r1=ip" type of instruction 2) Support Kprobes and Jprobes to exist on the same address 3) Support Return probes 3) Architecture independent cleanup of kprobes This patch adds the kdebug die notification mechanism needed by Kprobes. For break instruction on Branch type slot, imm21 is ignored and value zero is placed in IIM register, hence we need to handle kprobes for switch case zero. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Rusty Lynch <Rusty.lynch@intel.com> From: Rusty Lynch <rusty.lynch@intel.com> At the point in traps.c where we recieve a break with a zero value, we can not say if the break was a result of a kprobe or some other debug facility. This simple patch changes the informational string to a more correct "break 0" value, and applies to the 2.6.12-rc2-mm2 tree with all the kprobes patches that were just recently included for the next mm cut. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 15:09:27 +08:00
if (notify_die(DIE_BREAK, "break 0", regs, break_num, TRAP_BRKPT, SIGTRAP)
[IA64] Extend notify_die() hooks for IA64 notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple notification points for these events because they can take many seconds to run which has nasty effects on the behaviour of the rest of the system. DIE_SS replaced by a generic DIE_FAULT which checks the vector number, to allow interception of faults other than SS. DIE_MACHINE_{HALT,RESTART} added to allow last minute close down processing, especially when the halt/restart routines are called from error handlers. DIE_OOPS added. The check for kprobe's break numbers has been moved from traps.c to kprobes.c, allowing DIE_BREAK to be used for any additional break numbers, i.e. it is no longer kprobes specific. Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE. Both of these disable the system for long periods which impact on watchdogs and heartbeat systems in general. More patches to come that use these events to reset watchdogs and heartbeats. unregister_die_notifier() added and both routines exported. Requested by Dean Nelson. Lock removed from {un,}register_die_notifier. notifier_chain_register() already takes a lock. Also the generic notifier chain locking is being reworked to distinguish between callbacks that can block and those that cannot, the lock in {un,}register_die_notifier would interfere with that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 Leading white space removed from arch/ia64/kernel/kprobes.c. Typo in mca.c in original version of this patch found & fixed by Dean Nelson. Signed-off-by: Keith Owens <kaos@sgi.com> Acked-by: Dean Nelson <dcn@sgi.com> Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
== NOTIFY_STOP)
[PATCH] Kprobes/IA64: kdebug die notification mechanism As many of you know that kprobes exist in the main line kernel for various architecture including i386, x86_64, ppc64 and sparc64. Attached patches following this mail are a port of Kprobes and Jprobes for IA64. I have tesed this patches for kprobes and Jprobes and this seems to work fine. I have tested this patch by inserting kprobes on various slots and various templates including various types of branch instructions. I have also tested this patch using the tool http://marc.theaimsgroup.com/?l=linux-kernel&m=111657358022586&w=2 and the kprobes for IA64 works great. Here is list of TODO things and pathes for the same will appear soon. 1) Support kprobes on "mov r1=ip" type of instruction 2) Support Kprobes and Jprobes to exist on the same address 3) Support Return probes 3) Architecture independent cleanup of kprobes This patch adds the kdebug die notification mechanism needed by Kprobes. For break instruction on Branch type slot, imm21 is ignored and value zero is placed in IIM register, hence we need to handle kprobes for switch case zero. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Rusty Lynch <Rusty.lynch@intel.com> From: Rusty Lynch <rusty.lynch@intel.com> At the point in traps.c where we recieve a break with a zero value, we can not say if the break was a result of a kprobe or some other debug facility. This simple patch changes the informational string to a more correct "break 0" value, and applies to the 2.6.12-rc2-mm2 tree with all the kprobes patches that were just recently included for the next mm cut. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 15:09:27 +08:00
return;
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
if (die_if_kernel("bugcheck!", regs, break_num))
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sig = SIGILL; code = ILL_ILLOPC;
break;
case 1: /* integer divide by zero */
sig = SIGFPE; code = FPE_INTDIV;
break;
case 2: /* integer overflow */
sig = SIGFPE; code = FPE_INTOVF;
break;
case 3: /* range check/bounds check */
sig = SIGFPE; code = FPE_FLTSUB;
break;
case 4: /* null pointer dereference */
sig = SIGSEGV; code = SEGV_MAPERR;
break;
case 5: /* misaligned data */
sig = SIGSEGV; code = BUS_ADRALN;
break;
case 6: /* decimal overflow */
sig = SIGFPE; code = __FPE_DECOVF;
break;
case 7: /* decimal divide by zero */
sig = SIGFPE; code = __FPE_DECDIV;
break;
case 8: /* packed decimal error */
sig = SIGFPE; code = __FPE_DECERR;
break;
case 9: /* invalid ASCII digit */
sig = SIGFPE; code = __FPE_INVASC;
break;
case 10: /* invalid decimal digit */
sig = SIGFPE; code = __FPE_INVDEC;
break;
case 11: /* paragraph stack overflow */
sig = SIGSEGV; code = __SEGV_PSTKOVF;
break;
case 0x3f000 ... 0x3ffff: /* bundle-update in progress */
sig = SIGILL; code = __ILL_BNDMOD;
break;
default:
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
if ((break_num < 0x40000 || break_num > 0x100000)
&& die_if_kernel("Bad break", regs, break_num))
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (break_num < 0x80000) {
sig = SIGILL; code = __ILL_BREAK;
} else {
[IA64] Extend notify_die() hooks for IA64 notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple notification points for these events because they can take many seconds to run which has nasty effects on the behaviour of the rest of the system. DIE_SS replaced by a generic DIE_FAULT which checks the vector number, to allow interception of faults other than SS. DIE_MACHINE_{HALT,RESTART} added to allow last minute close down processing, especially when the halt/restart routines are called from error handlers. DIE_OOPS added. The check for kprobe's break numbers has been moved from traps.c to kprobes.c, allowing DIE_BREAK to be used for any additional break numbers, i.e. it is no longer kprobes specific. Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE. Both of these disable the system for long periods which impact on watchdogs and heartbeat systems in general. More patches to come that use these events to reset watchdogs and heartbeats. unregister_die_notifier() added and both routines exported. Requested by Dean Nelson. Lock removed from {un,}register_die_notifier. notifier_chain_register() already takes a lock. Also the generic notifier chain locking is being reworked to distinguish between callbacks that can block and those that cannot, the lock in {un,}register_die_notifier would interfere with that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 Leading white space removed from arch/ia64/kernel/kprobes.c. Typo in mca.c in original version of this patch found & fixed by Dean Nelson. Signed-off-by: Keith Owens <kaos@sgi.com> Acked-by: Dean Nelson <dcn@sgi.com> Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
if (notify_die(DIE_BREAK, "bad break", regs, break_num, TRAP_BRKPT, SIGTRAP)
== NOTIFY_STOP)
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
sig = SIGTRAP; code = TRAP_BRKPT;
}
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(sig, code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
break_num, 0 /* clear __ISR_VALID */, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*
* disabled_fph_fault() is called when a user-level process attempts to access f32..f127
* and it doesn't own the fp-high register partition. When this happens, we save the
* current fph partition in the task_struct of the fpu-owner (if necessary) and then load
* the fp-high partition of the current task (if necessary). Note that the kernel has
* access to fph by the time we get here, as the IVT's "Disabled FP-Register" handler takes
* care of clearing psr.dfh.
*/
static inline void
disabled_fph_fault (struct pt_regs *regs)
{
struct ia64_psr *psr = ia64_psr(regs);
/* first, grant user-level access to fph partition: */
psr->dfh = 0;
[PATCH] ia64: fix floating-point preemption problem There've been reports of problems with CONFIG_PREEMPT=y and the high floating point partition. This is caused by the possibility of preemption and rescheduling on a different processor while saving or restioirng the high partition. The only places where the FPU state is touched are in ptrace, in switch_to(), and where handling a floating-point exception. In switch_to() preemption is off. So it's only in trap.c and ptrace.c that we need to prevent preemption. Here is a patch that adds commentary to make the conditions clear, and adds appropriate preempt_{en,dis}able() calls to make it so. In trap.c I use preempt_enable_no_resched(), as we're about to return to user space where the preemption flag will be checked anyway. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-09 06:50:20 +08:00
/*
* Make sure that no other task gets in on this processor
* while we're claiming the FPU
*/
preempt_disable();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifndef CONFIG_SMP
{
struct task_struct *fpu_owner
= (struct task_struct *)ia64_get_kr(IA64_KR_FPU_OWNER);
[PATCH] ia64: fix floating-point preemption problem There've been reports of problems with CONFIG_PREEMPT=y and the high floating point partition. This is caused by the possibility of preemption and rescheduling on a different processor while saving or restioirng the high partition. The only places where the FPU state is touched are in ptrace, in switch_to(), and where handling a floating-point exception. In switch_to() preemption is off. So it's only in trap.c and ptrace.c that we need to prevent preemption. Here is a patch that adds commentary to make the conditions clear, and adds appropriate preempt_{en,dis}able() calls to make it so. In trap.c I use preempt_enable_no_resched(), as we're about to return to user space where the preemption flag will be checked anyway. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-09 06:50:20 +08:00
if (ia64_is_local_fpu_owner(current)) {
preempt_enable_no_resched();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
[PATCH] ia64: fix floating-point preemption problem There've been reports of problems with CONFIG_PREEMPT=y and the high floating point partition. This is caused by the possibility of preemption and rescheduling on a different processor while saving or restioirng the high partition. The only places where the FPU state is touched are in ptrace, in switch_to(), and where handling a floating-point exception. In switch_to() preemption is off. So it's only in trap.c and ptrace.c that we need to prevent preemption. Here is a patch that adds commentary to make the conditions clear, and adds appropriate preempt_{en,dis}able() calls to make it so. In trap.c I use preempt_enable_no_resched(), as we're about to return to user space where the preemption flag will be checked anyway. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-09 06:50:20 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (fpu_owner)
ia64_flush_fph(fpu_owner);
}
#endif /* !CONFIG_SMP */
ia64_set_local_fpu_owner(current);
if ((current->thread.flags & IA64_THREAD_FPH_VALID) != 0) {
__ia64_load_fpu(current->thread.fph);
psr->mfh = 0;
} else {
__ia64_init_fpu();
/*
* Set mfh because the state in thread.fph does not match the state in
* the fph partition.
*/
psr->mfh = 1;
}
[PATCH] ia64: fix floating-point preemption problem There've been reports of problems with CONFIG_PREEMPT=y and the high floating point partition. This is caused by the possibility of preemption and rescheduling on a different processor while saving or restioirng the high partition. The only places where the FPU state is touched are in ptrace, in switch_to(), and where handling a floating-point exception. In switch_to() preemption is off. So it's only in trap.c and ptrace.c that we need to prevent preemption. Here is a patch that adds commentary to make the conditions clear, and adds appropriate preempt_{en,dis}able() calls to make it so. In trap.c I use preempt_enable_no_resched(), as we're about to return to user space where the preemption flag will be checked anyway. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-09 06:50:20 +08:00
preempt_enable_no_resched();
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
static inline int
fp_emulate (int fp_fault, void *bundle, long *ipsr, long *fpsr, long *isr, long *pr, long *ifs,
struct pt_regs *regs)
{
fp_state_t fp_state;
fpswa_ret_t ret;
if (!fpswa_interface)
return -1;
memset(&fp_state, 0, sizeof(fp_state_t));
/*
* compute fp_state. only FP registers f6 - f11 are used by the
* kernel, so set those bits in the mask and set the low volatile
* pointer to point to these registers.
*/
fp_state.bitmask_low64 = 0xfc0; /* bit6..bit11 */
fp_state.fp_state_low_volatile = (fp_state_low_volatile_t *) &regs->f6;
/*
* unsigned long (*EFI_FPSWA) (
* unsigned long trap_type,
* void *Bundle,
* unsigned long *pipsr,
* unsigned long *pfsr,
* unsigned long *pisr,
* unsigned long *ppreds,
* unsigned long *pifs,
* void *fp_state);
*/
ret = (*fpswa_interface->fpswa)((unsigned long) fp_fault, bundle,
(unsigned long *) ipsr, (unsigned long *) fpsr,
(unsigned long *) isr, (unsigned long *) pr,
(unsigned long *) ifs, &fp_state);
return ret.status;
}
[IA64] - Reduce overhead of FP exception logging messages Improve the scalability of the fpswa code that rate-limits logging of messages. There are 2 distinctly different problems in this code. 1) If prctl is used to disable logging, last_time is never updated. The result is that fpu_swa_count is zeroed out on EVERY fp fault. This causes a very very hot cache line. The fix reduces the wallclock time of a 1024p FP exception test from 28734 sec to 19 sec!!! 2) On VERY large systems, excessive messages are logged because multiple cpus can each reset or increment fpu_swa_count at about the same time. The result is that hundreds of messages are logged each second. The fixes reduces the logging rate to ~1 per second. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-11-22 23:55:08 +08:00
struct fpu_swa_msg {
unsigned long count;
unsigned long time;
};
static DEFINE_PER_CPU(struct fpu_swa_msg, cpulast);
DECLARE_PER_CPU(struct fpu_swa_msg, cpulast);
static struct fpu_swa_msg last __cacheline_aligned;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Handle floating-point assist faults and traps.
*/
static int
handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
{
long exception, bundle[2];
unsigned long fault_ip;
fault_ip = regs->cr_iip;
if (!fp_fault && (ia64_psr(regs)->ri == 0))
fault_ip -= 16;
if (copy_from_user(bundle, (void __user *) fault_ip, sizeof(bundle)))
return -1;
[IA64] - Reduce overhead of FP exception logging messages Improve the scalability of the fpswa code that rate-limits logging of messages. There are 2 distinctly different problems in this code. 1) If prctl is used to disable logging, last_time is never updated. The result is that fpu_swa_count is zeroed out on EVERY fp fault. This causes a very very hot cache line. The fix reduces the wallclock time of a 1024p FP exception test from 28734 sec to 19 sec!!! 2) On VERY large systems, excessive messages are logged because multiple cpus can each reset or increment fpu_swa_count at about the same time. The result is that hundreds of messages are logged each second. The fixes reduces the logging rate to ~1 per second. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-11-22 23:55:08 +08:00
if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT)) {
unsigned long count, current_jiffies = jiffies;
ia64: Replace __get_cpu_var uses __get_cpu_var() is used for multiple purposes in the kernel source. One of them is address calculation via the form &__get_cpu_var(x). This calculates the address for the instance of the percpu variable of the current processor based on an offset. Other use cases are for storing and retrieving data from the current processors percpu area. __get_cpu_var() can be used as an lvalue when writing data or on the right side of an assignment. __get_cpu_var() is defined as : #define __get_cpu_var(var) (*this_cpu_ptr(&(var))) __get_cpu_var() always only does an address determination. However, store and retrieve operations could use a segment prefix (or global register on other platforms) to avoid the address calculation. this_cpu_write() and this_cpu_read() can directly take an offset into a percpu area and use optimized assembly code to read and write per cpu variables. This patch converts __get_cpu_var into either an explicit address calculation using this_cpu_ptr() or into a use of this_cpu operations that use the offset. Thereby address calculations are avoided and less registers are used when code is generated. At the end of the patch set all uses of __get_cpu_var have been removed so the macro is removed too. The patch set includes passes over all arches as well. Once these operations are used throughout then specialized macros can be defined in non -x86 arches as well in order to optimize per cpu access by f.e. using a global register that may be set to the per cpu base. Transformations done to __get_cpu_var() 1. Determine the address of the percpu instance of the current processor. DEFINE_PER_CPU(int, y); int *x = &__get_cpu_var(y); Converts to int *x = this_cpu_ptr(&y); 2. Same as #1 but this time an array structure is involved. DEFINE_PER_CPU(int, y[20]); int *x = __get_cpu_var(y); Converts to int *x = this_cpu_ptr(y); 3. Retrieve the content of the current processors instance of a per cpu variable. DEFINE_PER_CPU(int, y); int x = __get_cpu_var(y) Converts to int x = __this_cpu_read(y); 4. Retrieve the content of a percpu struct DEFINE_PER_CPU(struct mystruct, y); struct mystruct x = __get_cpu_var(y); Converts to memcpy(&x, this_cpu_ptr(&y), sizeof(x)); 5. Assignment to a per cpu variable DEFINE_PER_CPU(int, y) __get_cpu_var(y) = x; Converts to __this_cpu_write(y, x); 6. Increment/Decrement etc of a per cpu variable DEFINE_PER_CPU(int, y); __get_cpu_var(y)++ Converts to __this_cpu_inc(y) Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2014-08-18 01:30:47 +08:00
struct fpu_swa_msg *cp = this_cpu_ptr(&cpulast);
[IA64] - Reduce overhead of FP exception logging messages Improve the scalability of the fpswa code that rate-limits logging of messages. There are 2 distinctly different problems in this code. 1) If prctl is used to disable logging, last_time is never updated. The result is that fpu_swa_count is zeroed out on EVERY fp fault. This causes a very very hot cache line. The fix reduces the wallclock time of a 1024p FP exception test from 28734 sec to 19 sec!!! 2) On VERY large systems, excessive messages are logged because multiple cpus can each reset or increment fpu_swa_count at about the same time. The result is that hundreds of messages are logged each second. The fixes reduces the logging rate to ~1 per second. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-11-22 23:55:08 +08:00
if (unlikely(current_jiffies > cp->time))
cp->count = 0;
if (unlikely(cp->count < 5)) {
cp->count++;
cp->time = current_jiffies + 5 * HZ;
/* minimize races by grabbing a copy of count BEFORE checking last.time. */
count = last.count;
barrier();
/*
* Lower 4 bits are used as a count. Upper bits are a sequence
* number that is updated when count is reset. The cmpxchg will
* fail is seqno has changed. This minimizes mutiple cpus
[IA64] spelling fixes: arch/ia64/ Spelling and apostrophe fixes in arch/ia64/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-05-12 05:55:43 +08:00
* resetting the count.
[IA64] - Reduce overhead of FP exception logging messages Improve the scalability of the fpswa code that rate-limits logging of messages. There are 2 distinctly different problems in this code. 1) If prctl is used to disable logging, last_time is never updated. The result is that fpu_swa_count is zeroed out on EVERY fp fault. This causes a very very hot cache line. The fix reduces the wallclock time of a 1024p FP exception test from 28734 sec to 19 sec!!! 2) On VERY large systems, excessive messages are logged because multiple cpus can each reset or increment fpu_swa_count at about the same time. The result is that hundreds of messages are logged each second. The fixes reduces the logging rate to ~1 per second. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-11-22 23:55:08 +08:00
*/
if (current_jiffies > last.time)
(void) cmpxchg_acq(&last.count, count, 16 + (count & ~15));
/* used fetchadd to atomically update the count */
if ((last.count & 15) < 5 && (ia64_fetchadd(1, &last.count, acq) & 15) < 5) {
last.time = current_jiffies + 5 * HZ;
printk(KERN_WARNING
"%s(%d): floating-point assist fault at ip %016lx, isr %016lx\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 14:40:41 +08:00
current->comm, task_pid_nr(current), regs->cr_iip + ia64_psr(regs)->ri, isr);
[IA64] - Reduce overhead of FP exception logging messages Improve the scalability of the fpswa code that rate-limits logging of messages. There are 2 distinctly different problems in this code. 1) If prctl is used to disable logging, last_time is never updated. The result is that fpu_swa_count is zeroed out on EVERY fp fault. This causes a very very hot cache line. The fix reduces the wallclock time of a 1024p FP exception test from 28734 sec to 19 sec!!! 2) On VERY large systems, excessive messages are logged because multiple cpus can each reset or increment fpu_swa_count at about the same time. The result is that hundreds of messages are logged each second. The fixes reduces the logging rate to ~1 per second. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-11-22 23:55:08 +08:00
}
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
exception = fp_emulate(fp_fault, bundle, &regs->cr_ipsr, &regs->ar_fpsr, &isr, &regs->pr,
&regs->cr_ifs, regs);
if (fp_fault) {
if (exception == 0) {
/* emulation was successful */
ia64_increment_ip(regs);
} else if (exception == -1) {
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
return -1;
} else {
/* is next instruction a trap? */
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
int si_code;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (exception & 2) {
ia64_increment_ip(regs);
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTUNK; /* default code */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (isr & 0x11) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTINV;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else if (isr & 0x22) {
/* denormal operand gets the same si_code as underflow
* see arch/i386/kernel/traps.c:math_error() */
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTUND;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else if (isr & 0x44) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTDIV;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGFPE, si_code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
0, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
} else {
if (exception == -1) {
printk(KERN_ERR "handle_fpu_swa: fp_emulate() returned -1\n");
return -1;
} else if (exception != 0) {
/* raise exception */
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
int si_code;
signal: Ensure every siginfo we send has all bits initialized Call clear_siginfo to ensure every stack allocated siginfo is properly initialized before being passed to the signal sending functions. Note: It is not safe to depend on C initializers to initialize struct siginfo on the stack because C is allowed to skip holes when initializing a structure. The initialization of struct siginfo in tracehook_report_syscall_exit was moved from the helper user_single_step_siginfo into tracehook_report_syscall_exit itself, to make it clear that the local variable siginfo gets fully initialized. In a few cases the scope of struct siginfo has been reduced to make it clear that siginfo siginfo is not used on other paths in the function in which it is declared. Instances of using memset to initialize siginfo have been replaced with calls clear_siginfo for clarity. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 04:26:37 +08:00
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTUNK; /* default code */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (isr & 0x880) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTOVF;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else if (isr & 0x1100) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTUND;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else if (isr & 0x2200) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = FPE_FLTRES;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGFPE, si_code,
(void __user *) (regs->cr_iip + ia64_psr(regs)->ri),
0, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
return 0;
}
struct illegal_op_return {
unsigned long fkt, arg1, arg2, arg3;
};
struct illegal_op_return
ia64_illegal_op_fault (unsigned long ec, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
struct illegal_op_return rv;
char buf[128];
#ifdef CONFIG_IA64_BRL_EMU
{
extern struct illegal_op_return ia64_emulate_brl (struct pt_regs *, unsigned long);
rv = ia64_emulate_brl(&regs, ec);
if (rv.fkt != (unsigned long) -1)
return rv;
}
#endif
sprintf(buf, "IA-64 Illegal operation fault");
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
rv.fkt = 0;
if (die_if_kernel(buf, &regs, 0))
return rv;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGILL, ILL_ILLOPC,
(void __user *) (regs.cr_iip + ia64_psr(&regs)->ri),
0, 0, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return rv;
}
[PATCH] Kprobes: prevent possible race conditions ia64 changes This patch contains the ia64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 06:19:30 +08:00
void __kprobes
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ia64_fault (unsigned long vector, unsigned long isr, unsigned long ifa,
unsigned long iim, unsigned long itir, long arg5, long arg6,
long arg7, struct pt_regs regs)
{
unsigned long code, error = isr, iip;
char buf[128];
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
int result, sig, si_code;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
static const char *reason[] = {
"IA-64 Illegal Operation fault",
"IA-64 Privileged Operation fault",
"IA-64 Privileged Register fault",
"IA-64 Reserved Register/Field fault",
"Disabled Instruction Set Transition fault",
"Unknown fault 5", "Unknown fault 6", "Unknown fault 7", "Illegal Hazard fault",
"Unknown fault 9", "Unknown fault 10", "Unknown fault 11", "Unknown fault 12",
"Unknown fault 13", "Unknown fault 14", "Unknown fault 15"
};
if ((isr & IA64_ISR_NA) && ((isr & IA64_ISR_CODE_MASK) == IA64_ISR_CODE_LFETCH)) {
/*
* This fault was due to lfetch.fault, set "ed" bit in the psr to cancel
* the lfetch.
*/
ia64_psr(&regs)->ed = 1;
return;
}
iip = regs.cr_iip + ia64_psr(&regs)->ri;
switch (vector) {
case 24: /* General Exception */
code = (isr >> 4) & 0xf;
sprintf(buf, "General Exception: %s%s", reason[code],
(code == 3) ? ((isr & (1UL << 37))
? " (RSE access)" : " (data access)") : "");
if (code == 8) {
# ifdef CONFIG_IA64_PRINT_HAZARDS
printk("%s[%d]: possible hazard @ ip=%016lx (pr = %016lx)\n",
Use helpers to obtain task pid in printks (arch code) One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 14:40:41 +08:00
current->comm, task_pid_nr(current),
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
regs.cr_iip + ia64_psr(&regs)->ri, regs.pr);
# endif
return;
}
break;
case 25: /* Disabled FP-Register */
if (isr & 2) {
disabled_fph_fault(&regs);
return;
}
sprintf(buf, "Disabled FPL fault---not supposed to happen!");
break;
case 26: /* NaT Consumption */
if (user_mode(&regs)) {
void __user *addr;
if (((isr >> 4) & 0xf) == 2) {
/* NaT page consumption */
sig = SIGSEGV;
code = SEGV_ACCERR;
addr = (void __user *) ifa;
} else {
/* register NaT consumption */
sig = SIGILL;
code = ILL_ILLOPN;
addr = (void __user *) (regs.cr_iip
+ ia64_psr(&regs)->ri);
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(sig, code, addr,
vector, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
} else if (ia64_done_with_exception(&regs))
return;
sprintf(buf, "NaT consumption");
break;
case 31: /* Unsupported Data Reference */
if (user_mode(&regs)) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGILL, ILL_ILLOPN, (void __user *) iip,
vector, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
}
sprintf(buf, "Unsupported data reference");
break;
case 29: /* Debug */
case 35: /* Taken Branch Trap */
case 36: /* Single Step Trap */
if (fsys_mode(current, &regs)) {
extern char __kernel_syscall_via_break[];
/*
[IA64] Handle debug traps in fsys mode We need to handle debug traps in fsys mode non-fatally. They can happen now that we have fsyscalls which contain probe instructions. Signed-off-by: Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-30 18:27:01 +08:00
* Got a trap in fsys-mode: Taken Branch Trap
* and Single Step trap need special handling;
* Debug trap is ignored (we disable it here
* and re-enable it in the lower-privilege trap).
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
if (unlikely(vector == 29)) {
[IA64] Handle debug traps in fsys mode We need to handle debug traps in fsys mode non-fatally. They can happen now that we have fsyscalls which contain probe instructions. Signed-off-by: Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-30 18:27:01 +08:00
set_thread_flag(TIF_DB_DISABLED);
ia64_psr(&regs)->db = 0;
ia64_psr(&regs)->lp = 1;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
}
/* re-do the system call via break 0x100000: */
regs.cr_iip = (unsigned long) __kernel_syscall_via_break;
ia64_psr(&regs)->ri = 0;
ia64_psr(&regs)->cpl = 3;
return;
}
switch (vector) {
ia64/traps: Silence GCC warning about uninitialised variable arch/ia64/kernel/traps.c: In function 'ia64_fault': arch/ia64/kernel/traps.c:433:17: warning: 'siginfo.si_code' may be used uninitialized in this function [-Wmaybe-uninitialized] struct siginfo siginfo; Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Bjorn Helgaas <helgaas@kernel.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Tony Luck <tony.luck@intel.com>
2016-05-04 19:17:49 +08:00
default:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
case 29:
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
si_code = TRAP_HWBKPT;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_ITANIUM
/*
* Erratum 10 (IFA may contain incorrect address) now has
* "NoFix" status. There are no plans for fixing this.
*/
if (ia64_psr(&regs)->is == 0)
ifa = regs.cr_iip;
#endif
break;
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
case 35: si_code = TRAP_BRANCH; ifa = 0; break;
case 36: si_code = TRAP_TRACE; ifa = 0; break;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
if (notify_die(DIE_FAULT, "ia64_fault", &regs, vector, si_code, SIGTRAP)
[IA64] Extend notify_die() hooks for IA64 notify_die() added for MCA_{MONARCH,SLAVE,RENDEZVOUS}_{ENTER,PROCESS,LEAVE} and INIT_{MONARCH,SLAVE}_{ENTER,PROCESS,LEAVE}. We need multiple notification points for these events because they can take many seconds to run which has nasty effects on the behaviour of the rest of the system. DIE_SS replaced by a generic DIE_FAULT which checks the vector number, to allow interception of faults other than SS. DIE_MACHINE_{HALT,RESTART} added to allow last minute close down processing, especially when the halt/restart routines are called from error handlers. DIE_OOPS added. The check for kprobe's break numbers has been moved from traps.c to kprobes.c, allowing DIE_BREAK to be used for any additional break numbers, i.e. it is no longer kprobes specific. Hooks for kernel debuggers and kernel dumpers added, ENTER and LEAVE. Both of these disable the system for long periods which impact on watchdogs and heartbeat systems in general. More patches to come that use these events to reset watchdogs and heartbeats. unregister_die_notifier() added and both routines exported. Requested by Dean Nelson. Lock removed from {un,}register_die_notifier. notifier_chain_register() already takes a lock. Also the generic notifier chain locking is being reworked to distinguish between callbacks that can block and those that cannot, the lock in {un,}register_die_notifier would interfere with that change. http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 Leading white space removed from arch/ia64/kernel/kprobes.c. Typo in mca.c in original version of this patch found & fixed by Dean Nelson. Signed-off-by: Keith Owens <kaos@sgi.com> Acked-by: Dean Nelson <dcn@sgi.com> Acked-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-08 03:27:13 +08:00
== NOTIFY_STOP)
return;
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGTRAP, si_code, (void __user *) ifa,
0, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
case 32: /* fp fault */
case 33: /* fp trap */
result = handle_fpu_swa((vector == 32) ? 1 : 0, &regs, isr);
if ((result < 0) || (current->thread.flags & IA64_THREAD_FPEMU_SIGFPE)) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGFPE, FPE_FLTINV, (void __user *) iip,
0, __ISR_VALID, isr, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
return;
case 34:
if (isr & 0x2) {
/* Lower-Privilege Transfer Trap */
[IA64] Handle debug traps in fsys mode We need to handle debug traps in fsys mode non-fatally. They can happen now that we have fsyscalls which contain probe instructions. Signed-off-by: Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-30 18:27:01 +08:00
/* If we disabled debug traps during an fsyscall,
* re-enable them here.
*/
if (test_thread_flag(TIF_DB_DISABLED)) {
clear_thread_flag(TIF_DB_DISABLED);
ia64_psr(&regs)->db = 1;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
[IA64] Handle debug traps in fsys mode We need to handle debug traps in fsys mode non-fatally. They can happen now that we have fsyscalls which contain probe instructions. Signed-off-by: Jason Uhlenkott <jasonuhl@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-30 18:27:01 +08:00
* Just clear PSR.lp and then return immediately:
* all the interesting work (e.g., signal delivery)
* is done in the kernel exit path.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
ia64_psr(&regs)->lp = 0;
return;
} else {
/* Unimplemented Instr. Address Trap */
if (user_mode(&regs)) {
signal/ia64: Use force_sig_fault where appropriate Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2018-04-18 06:39:29 +08:00
force_sig_fault(SIGILL, ILL_BADIADDR,
(void __user *) iip,
0, 0, 0, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return;
}
sprintf(buf, "Unimplemented Instruction Address fault");
}
break;
case 45:
printk(KERN_ERR "Unexpected IA-32 exception (Trap 45)\n");
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx\n",
iip, ifa, isr);
force_sig(SIGSEGV, current);
[IA64] Fix trap #45 handling In this case, the original author did not provide the related reason string for die_if_kernel(), so the 'buf' is not initialized. The original author wants to generic a 'SIGSEGV' and 'return', not want to 'break' to fall to die. [Probably irrelevent since we no longer support IA-32 execution. -Tony] Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2013-05-27 14:30:29 +08:00
return;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
case 46:
printk(KERN_ERR "Unexpected IA-32 intercept trap (Trap 46)\n");
printk(KERN_ERR " iip - 0x%lx, ifa - 0x%lx, isr - 0x%lx, iim - 0x%lx\n",
iip, ifa, isr, iim);
force_sig(SIGSEGV, current);
return;
case 47:
sprintf(buf, "IA-32 Interruption Fault (int 0x%lx)", isr >> 16);
break;
default:
sprintf(buf, "Fault %lu", vector);
break;
}
[IA64] honor notify_die() returning NOTIFY_STOP This requires making die() and die_if_kernel() return a value, and their callers to honor this (and be prepared that it returns). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-05 15:43:03 +08:00
if (!die_if_kernel(buf, &regs, error))
force_sig(SIGILL, current);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}