ae9a5b8565
Overloading of page fault notification with the notify_die() has performance issues(since the only interested components for page fault is kprobes and/or kdb) and hence this patch introduces the new notifier call chain exclusively for page fault notifications their by avoiding notifying unnecessary components in the do_page_fault() code path. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
#ifndef _IA64_KDEBUG_H
|
|
#define _IA64_KDEBUG_H 1
|
|
/*
|
|
* include/asm-ia64/kdebug.h
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) Intel Corporation, 2005
|
|
*
|
|
* 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
|
|
* <anil.s.keshavamurthy@intel.com> adopted from
|
|
* include/asm-x86_64/kdebug.h
|
|
*
|
|
* 2005-Oct Keith Owens <kaos@sgi.com>. Expand notify_die to cover more
|
|
* events.
|
|
*/
|
|
#include <linux/notifier.h>
|
|
|
|
struct pt_regs;
|
|
|
|
struct die_args {
|
|
struct pt_regs *regs;
|
|
const char *str;
|
|
long err;
|
|
int trapnr;
|
|
int signr;
|
|
};
|
|
|
|
extern int register_die_notifier(struct notifier_block *);
|
|
extern int unregister_die_notifier(struct notifier_block *);
|
|
extern int register_page_fault_notifier(struct notifier_block *);
|
|
extern int unregister_page_fault_notifier(struct notifier_block *);
|
|
extern struct atomic_notifier_head ia64die_chain;
|
|
|
|
enum die_val {
|
|
DIE_BREAK = 1,
|
|
DIE_FAULT,
|
|
DIE_OOPS,
|
|
DIE_PAGE_FAULT,
|
|
DIE_MACHINE_HALT,
|
|
DIE_MACHINE_RESTART,
|
|
DIE_MCA_MONARCH_ENTER,
|
|
DIE_MCA_MONARCH_PROCESS,
|
|
DIE_MCA_MONARCH_LEAVE,
|
|
DIE_MCA_SLAVE_ENTER,
|
|
DIE_MCA_SLAVE_PROCESS,
|
|
DIE_MCA_SLAVE_LEAVE,
|
|
DIE_MCA_RENDZVOUS_ENTER,
|
|
DIE_MCA_RENDZVOUS_PROCESS,
|
|
DIE_MCA_RENDZVOUS_LEAVE,
|
|
DIE_MCA_NEW_TIMEOUT,
|
|
DIE_INIT_ENTER,
|
|
DIE_INIT_MONARCH_ENTER,
|
|
DIE_INIT_MONARCH_PROCESS,
|
|
DIE_INIT_MONARCH_LEAVE,
|
|
DIE_INIT_SLAVE_ENTER,
|
|
DIE_INIT_SLAVE_PROCESS,
|
|
DIE_INIT_SLAVE_LEAVE,
|
|
DIE_KDEBUG_ENTER,
|
|
DIE_KDEBUG_LEAVE,
|
|
DIE_KDUMP_ENTER,
|
|
DIE_KDUMP_LEAVE,
|
|
};
|
|
|
|
static inline int notify_die(enum die_val val, char *str, struct pt_regs *regs,
|
|
long err, int trap, int sig)
|
|
{
|
|
struct die_args args = {
|
|
.regs = regs,
|
|
.str = str,
|
|
.err = err,
|
|
.trapnr = trap,
|
|
.signr = sig
|
|
};
|
|
|
|
return atomic_notifier_call_chain(&ia64die_chain, val, &args);
|
|
}
|
|
|
|
#endif
|