mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-17 07:54:54 +08:00
9a5ad7d0e3
The gic_handle_irq() is defined with __exception_irq_entry attribute.
A single remaining work is to add its definition as ARM did. Below
shows how function graph data is changed with these hunks.
A prologue of an interrupt handler is drawn as follows.
- current status
0) 0.208 us | cpuidle_not_available();
0) | default_idle_call() {
0) | arch_cpu_idle() {
0) | __handle_domain_irq() {
0) | irq_enter() {
0) 0.313 us | rcu_irq_enter();
0) 0.261 us | __local_bh_disable_ip();
- with this change
0) 0.625 us | cpuidle_not_available();
0) | default_idle_call() {
0) | arch_cpu_idle() {
0) ==========> |
0) | gic_handle_irq() {
0) | __handle_domain_irq() {
0) | irq_enter() {
0) 0.885 us | rcu_irq_enter();
0) 0.781 us | __local_bh_disable_ip();
An epilogue of an interrupt handler is recorded as follows.
- current status
0) 0.261 us | idle_cpu();
0) | rcu_irq_exit() {
0) 0.521 us | rcu_eqs_enter_common.isra.46();
0) 2.552 us | }
0) ! 322.448 us | }
0) ! 583.437 us | }
0) # 1656.041 us | }
0) # 1658.073 us | }
- with this change
0) 0.677 us | idle_cpu();
0) | rcu_irq_exit() {
0) 1.770 us | rcu_eqs_enter_common.isra.46();
0) 7.968 us | }
0) # 1803.541 us | }
0) # 2626.667 us | }
0) # 2632.969 us | }
0) <========== |
0) # 14425.00 us | }
0) # 14430.98 us | }
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Rabin Vincent <rabin@rab.in>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
|
|
* Based on arch/arm/include/asm/traps.h
|
|
*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_TRAP_H
|
|
#define __ASM_TRAP_H
|
|
|
|
#include <linux/list.h>
|
|
|
|
struct pt_regs;
|
|
|
|
struct undef_hook {
|
|
struct list_head node;
|
|
u32 instr_mask;
|
|
u32 instr_val;
|
|
u64 pstate_mask;
|
|
u64 pstate_val;
|
|
int (*fn)(struct pt_regs *regs, u32 instr);
|
|
};
|
|
|
|
void register_undef_hook(struct undef_hook *hook);
|
|
void unregister_undef_hook(struct undef_hook *hook);
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
static inline int __in_irqentry_text(unsigned long ptr)
|
|
{
|
|
extern char __irqentry_text_start[];
|
|
extern char __irqentry_text_end[];
|
|
|
|
return ptr >= (unsigned long)&__irqentry_text_start &&
|
|
ptr < (unsigned long)&__irqentry_text_end;
|
|
}
|
|
#else
|
|
static inline int __in_irqentry_text(unsigned long ptr)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static inline int in_exception_text(unsigned long ptr)
|
|
{
|
|
extern char __exception_text_start[];
|
|
extern char __exception_text_end[];
|
|
int in;
|
|
|
|
in = ptr >= (unsigned long)&__exception_text_start &&
|
|
ptr < (unsigned long)&__exception_text_end;
|
|
|
|
return in ? : __in_irqentry_text(ptr);
|
|
}
|
|
|
|
#endif
|