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authorYong Wang <yong.y.wang@linux.intel.com>2009-06-03 13:12:55 +0800
committerIngo Molnar <mingo@elte.hu>2009-06-03 09:53:34 +0200
commita32881066e58346f2901afe0ebdfbf0c562877e5 (patch)
treeacd28c9b659a3df0769eedb32127e9c6ad72def9
parentaddc2785ce92ff05da8edf18317b6b4719e10d9f (diff)
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@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <20090603051255.GA2791@ywang-moblin2.bj.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/include/asm/entry_arch.h1
-rw-r--r--arch/x86/include/asm/hw_irq.h1
-rw-r--r--arch/x86/include/asm/irq_vectors.h5
-rw-r--r--arch/x86/kernel/cpu/perf_counter.c21
-rw-r--r--arch/x86/kernel/entry_64.S2
-rw-r--r--arch/x86/kernel/irqinit_32.c1
-rw-r--r--arch/x86/kernel/irqinit_64.c1
7 files changed, 6 insertions, 26 deletions
diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h
index fe24d280249..d750a10ccad 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 7309c0ad690..4b4921d7a28 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 545bb811ccb..4492e19f839 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -107,11 +107,6 @@
#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 e16e8c13132..12cc05ed9f4 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 89100461914..7985c010f8a 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1026,8 +1026,6 @@ 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_32.c b/arch/x86/kernel/irqinit_32.c
index 3190a6b961e..205bdd880d3 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -165,7 +165,6 @@ static void __init apic_intr_init(void)
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
# ifdef CONFIG_PERF_COUNTERS
- alloc_intr_gate(LOCAL_PERF_VECTOR, perf_counter_interrupt);
alloc_intr_gate(LOCAL_PENDING_VECTOR, perf_pending_interrupt);
# endif
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 53ceb26f80f..fa6ef692000 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -155,7 +155,6 @@ static void __init apic_intr_init(void)
/* Performance monitoring interrupt: */
#ifdef CONFIG_PERF_COUNTERS
- alloc_intr_gate(LOCAL_PERF_VECTOR, perf_counter_interrupt);
alloc_intr_gate(LOCAL_PENDING_VECTOR, perf_pending_interrupt);
#endif
}