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Date: Wed, 3 Jun 2009 13:12:55 +0800
From: Yong Wang <yong.y.wang@...ux.intel.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH -tip] perf_counter/x86: Remove the IRQ (non-NMI) handling
bits
Remove the IRQ (non-NMI) handling bits as NMI will be used always.
Signed-off-by: Yong Wang <yong.y.wang@...el.com>
---
include/asm/entry_arch.h | 1 -
include/asm/hw_irq.h | 1 -
include/asm/irq_vectors.h | 5 -----
kernel/cpu/perf_counter.c | 21 ++++++---------------
kernel/entry_64.S | 2 --
kernel/irqinit.c | 1 -
6 files changed, 6 insertions(+), 25 deletions(-)
diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h
index 794bb12..89c59b2 100644
--- a/arch/x86/include/asm/entry_arch.h
+++ b/arch/x86/include/asm/entry_arch.h
@@ -49,7 +49,6 @@ BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
BUILD_INTERRUPT(spurious_interrupt,SPURIOUS_APIC_VECTOR)
#ifdef CONFIG_PERF_COUNTERS
-BUILD_INTERRUPT(perf_counter_interrupt, LOCAL_PERF_VECTOR)
BUILD_INTERRUPT(perf_pending_interrupt, LOCAL_PENDING_VECTOR)
#endif
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index d2b24a3..6df45f6 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -29,7 +29,6 @@
extern void apic_timer_interrupt(void);
extern void generic_interrupt(void);
extern void error_interrupt(void);
-extern void perf_counter_interrupt(void);
extern void perf_pending_interrupt(void);
extern void spurious_interrupt(void);
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
index e006719..3c2de12 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -108,11 +108,6 @@
#define LOCAL_TIMER_VECTOR 0xef
/*
- * Performance monitoring interrupt vector:
- */
-#define LOCAL_PERF_VECTOR 0xee
-
-/*
* Generic system vector for platform specific use
*/
#define GENERIC_INTERRUPT_VECTOR 0xed
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index e16e8c1..12cc05e 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -40,7 +40,7 @@ struct cpu_hw_counters {
struct x86_pmu {
const char *name;
int version;
- int (*handle_irq)(struct pt_regs *, int);
+ int (*handle_irq)(struct pt_regs *);
void (*disable_all)(void);
void (*enable_all)(void);
void (*enable)(struct hw_perf_counter *, int);
@@ -755,7 +755,7 @@ static void intel_pmu_reset(void)
* This handler is triggered by the local APIC, so the APIC IRQ handling
* rules apply:
*/
-static int intel_pmu_handle_irq(struct pt_regs *regs, int nmi)
+static int intel_pmu_handle_irq(struct pt_regs *regs)
{
struct cpu_hw_counters *cpuc;
struct cpu_hw_counters;
@@ -794,7 +794,7 @@ again:
if (!intel_pmu_save_and_restart(counter))
continue;
- if (perf_counter_overflow(counter, nmi, regs, 0))
+ if (perf_counter_overflow(counter, 1, regs, 0))
intel_pmu_disable_counter(&counter->hw, bit);
}
@@ -812,7 +812,7 @@ again:
return 1;
}
-static int amd_pmu_handle_irq(struct pt_regs *regs, int nmi)
+static int amd_pmu_handle_irq(struct pt_regs *regs)
{
int cpu, idx, handled = 0;
struct cpu_hw_counters *cpuc;
@@ -840,22 +840,13 @@ static int amd_pmu_handle_irq(struct pt_regs *regs, int nmi)
if (!x86_perf_counter_set_period(counter, hwc, idx))
continue;
- if (perf_counter_overflow(counter, nmi, regs, 0))
+ if (perf_counter_overflow(counter, 1, regs, 0))
amd_pmu_disable_counter(hwc, idx);
}
return handled;
}
-void smp_perf_counter_interrupt(struct pt_regs *regs)
-{
- irq_enter();
- apic_write(APIC_LVTPC, LOCAL_PERF_VECTOR);
- ack_APIC_irq();
- x86_pmu.handle_irq(regs, 0);
- irq_exit();
-}
-
void smp_perf_pending_interrupt(struct pt_regs *regs)
{
irq_enter();
@@ -910,7 +901,7 @@ perf_counter_nmi_handler(struct notifier_block *self,
* If the first NMI handles both, the latter will be empty and daze
* the CPU.
*/
- x86_pmu.handle_irq(regs, 1);
+ x86_pmu.handle_irq(regs);
return NOTIFY_STOP;
}
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 1008511..fbe821d 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1013,8 +1013,6 @@ apicinterrupt SPURIOUS_APIC_VECTOR \
spurious_interrupt smp_spurious_interrupt
#ifdef CONFIG_PERF_COUNTERS
-apicinterrupt LOCAL_PERF_VECTOR \
- perf_counter_interrupt smp_perf_counter_interrupt
apicinterrupt LOCAL_PENDING_VECTOR \
perf_pending_interrupt smp_perf_pending_interrupt
#endif
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index aab3d27..343ec2e 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -201,7 +201,6 @@ static void __init apic_intr_init(void)
/* Performance monitoring interrupts: */
# ifdef CONFIG_PERF_COUNTERS
- alloc_intr_gate(LOCAL_PERF_VECTOR, perf_counter_interrupt);
alloc_intr_gate(LOCAL_PENDING_VECTOR, perf_pending_interrupt);
# endif
--
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