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x86/irq, trace: Add __irq_entry annotation to x86's platform IRQ handlers 

This patch adds the __irq_entry annotation to the default x86
platform IRQ handlers. ftrace's function_graph tracer uses the
__irq_entry annotation to notify the entry and return of IRQ
handlers.

For example, before the patch:
  354549.667252 |   3)  d..1              |  default_idle_call() {
  354549.667252 |   3)  d..1              |    arch_cpu_idle() {
  354549.667253 |   3)  d..1              |      default_idle() {
  354549.696886 |   3)  d..1              |        smp_trace_reschedule_interrupt() {
  354549.696886 |   3)  d..1              |          irq_enter() {
  354549.696886 |   3)  d..1              |            rcu_irq_enter() {

After the patch:
  366416.254476 |   3)  d..1              |    arch_cpu_idle() {
  366416.254476 |   3)  d..1              |      default_idle() {
  366416.261566 |   3)  d..1  ==========> |
  366416.261566 |   3)  d..1              |        smp_trace_reschedule_interrupt() {
  366416.261566 |   3)  d..1              |          irq_enter() {
  366416.261566 |   3)  d..1              |            rcu_irq_enter() {

KASAN also uses this annotation. The smp_apic_timer_interrupt()
was already annotated.

Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Claudio Fontana <claudio.fontana@huawei.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: Gu Zheng <guz.fnst@cn.fujitsu.com>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicolai Stange <nicstange@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: linux-edac@vger.kernel.org
Link: http://lkml.kernel.org/r/059fdf437c2f0c09b13c18c8fe4e69999d3ffe69.1483528431.git.bristot@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Daniel Bristot de Oliveira 2017-01-04 12:20:33 +01:00 committed by Ingo Molnar
parent e02003b515
commit c4158ff536
8 changed files with 27 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/kernel/apic/apic.c
View File

@ -1864,14 +1864,14 @@ static void __smp_spurious_interrupt(u8 vector)
"should never happen.\n", vector, smp_processor_id());
}
__visible void smp_spurious_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_spurious_interrupt(struct pt_regs *regs)
{
entering_irq();
__smp_spurious_interrupt(~regs->orig_ax);
exiting_irq();
}
__visible void smp_trace_spurious_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_trace_spurious_interrupt(struct pt_regs *regs)
{
u8 vector = ~regs->orig_ax;
@ -1922,14 +1922,14 @@ static void __smp_error_interrupt(struct pt_regs *regs)
}
__visible void smp_error_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_error_interrupt(struct pt_regs *regs)
{
entering_irq();
__smp_error_interrupt(regs);
exiting_irq();
}
__visible void smp_trace_error_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_trace_error_interrupt(struct pt_regs *regs)
{
entering_irq();
trace_error_apic_entry(ERROR_APIC_VECTOR);

2
arch/x86/kernel/apic/vector.c
View File

@ -559,7 +559,7 @@ void send_cleanup_vector(struct irq_cfg *cfg)
__send_cleanup_vector(data);
}
asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
asmlinkage __visible void __irq_entry smp_irq_move_cleanup_interrupt(void)
{
unsigned vector, me;

4
arch/x86/kernel/cpu/mcheck/mce_amd.c
View File

@ -814,14 +814,14 @@ static inline void __smp_deferred_error_interrupt(void)
deferred_error_int_vector();
}
asmlinkage __visible void smp_deferred_error_interrupt(void)
asmlinkage __visible void __irq_entry smp_deferred_error_interrupt(void)
{
entering_irq();
__smp_deferred_error_interrupt();
exiting_ack_irq();
}
asmlinkage __visible void smp_trace_deferred_error_interrupt(void)
asmlinkage __visible void __irq_entry smp_trace_deferred_error_interrupt(void)
{
entering_irq();
trace_deferred_error_apic_entry(DEFERRED_ERROR_VECTOR);

6
arch/x86/kernel/cpu/mcheck/therm_throt.c
View File

@ -404,14 +404,16 @@ static inline void __smp_thermal_interrupt(void)
smp_thermal_vector();
}
asmlinkage __visible void smp_thermal_interrupt(struct pt_regs *regs)
asmlinkage __visible void __irq_entry
smp_thermal_interrupt(struct pt_regs *regs)
{
entering_irq();
__smp_thermal_interrupt();
exiting_ack_irq();
}
asmlinkage __visible void smp_trace_thermal_interrupt(struct pt_regs *regs)
asmlinkage __visible void __irq_entry
smp_trace_thermal_interrupt(struct pt_regs *regs)
{
entering_irq();
trace_thermal_apic_entry(THERMAL_APIC_VECTOR);

4
arch/x86/kernel/cpu/mcheck/threshold.c
View File

@ -23,14 +23,14 @@ static inline void __smp_threshold_interrupt(void)
mce_threshold_vector();
}
asmlinkage __visible void smp_threshold_interrupt(void)
asmlinkage __visible void __irq_entry smp_threshold_interrupt(void)
{
entering_irq();
__smp_threshold_interrupt();
exiting_ack_irq();
}
asmlinkage __visible void smp_trace_threshold_interrupt(void)
asmlinkage __visible void __irq_entry smp_trace_threshold_interrupt(void)
{
entering_irq();
trace_threshold_apic_entry(THRESHOLD_APIC_VECTOR);

4
arch/x86/kernel/irq.c
View File

@ -264,7 +264,7 @@ void __smp_x86_platform_ipi(void)
x86_platform_ipi_callback();
}
__visible void smp_x86_platform_ipi(struct pt_regs *regs)
__visible void __irq_entry smp_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@ -315,7 +315,7 @@ __visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs)
}
#endif
__visible void smp_trace_x86_platform_ipi(struct pt_regs *regs)
__visible void __irq_entry smp_trace_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

5
arch/x86/kernel/irq_work.c
View File

@ -9,6 +9,7 @@
#include <linux/hardirq.h>
#include <asm/apic.h>
#include <asm/trace/irq_vectors.h>
#include <linux/interrupt.h>
static inline void __smp_irq_work_interrupt(void)
{
@ -16,14 +17,14 @@ static inline void __smp_irq_work_interrupt(void)
irq_work_run();
}
__visible void smp_irq_work_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_irq_work_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
__smp_irq_work_interrupt();
exiting_irq();
}
__visible void smp_trace_irq_work_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_trace_irq_work_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
trace_irq_work_entry(IRQ_WORK_VECTOR);

15
arch/x86/kernel/smp.c
View File

@ -259,7 +259,7 @@ static inline void __smp_reschedule_interrupt(void)
scheduler_ipi();
}
__visible void smp_reschedule_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs)
{
ack_APIC_irq();
__smp_reschedule_interrupt();
@ -268,7 +268,7 @@ __visible void smp_reschedule_interrupt(struct pt_regs *regs)
*/
}
__visible void smp_trace_reschedule_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_trace_reschedule_interrupt(struct pt_regs *regs)
{
/*
* Need to call irq_enter() before calling the trace point.
@ -292,14 +292,15 @@ static inline void __smp_call_function_interrupt(void)
inc_irq_stat(irq_call_count);
}
__visible void smp_call_function_interrupt(struct pt_regs *regs)
__visible void __irq_entry smp_call_function_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
__smp_call_function_interrupt();
exiting_irq();
}
__visible void smp_trace_call_function_interrupt(struct pt_regs *regs)
__visible void __irq_entry
smp_trace_call_function_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
trace_call_function_entry(CALL_FUNCTION_VECTOR);
@ -314,14 +315,16 @@ static inline void __smp_call_function_single_interrupt(void)
inc_irq_stat(irq_call_count);
}
__visible void smp_call_function_single_interrupt(struct pt_regs *regs)
__visible void __irq_entry
smp_call_function_single_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
__smp_call_function_single_interrupt();
exiting_irq();
}
__visible void smp_trace_call_function_single_interrupt(struct pt_regs *regs)
__visible void __irq_entry
smp_trace_call_function_single_interrupt(struct pt_regs *regs)
{
ipi_entering_ack_irq();
trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);