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perf_counter, x86: rework counter disable functions 

As for the enable function, this patch reworks the disable functions
and introduces x86_pmu_disable_counter(). The internal function i/f in
struct x86_pmu changed too.

[ Impact: refactor and generalize code ]

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-23-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter 2009-04-29 12:47:19 +02:00 committed by Ingo Molnar
parent 7c90cc45f8
commit d43698918b
1 changed files with 23 additions and 25 deletions
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48
arch/x86/kernel/cpu/perf_counter.c
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@ -45,7 +45,7 @@ struct x86_pmu {
u64 (*save_disable_all)(void);
void (*restore_all)(u64);
void (*enable)(struct hw_perf_counter *, int);
void (*disable)(int, u64);
void (*disable)(struct hw_perf_counter *, int);
unsigned eventsel;
unsigned perfctr;
u64 (*event_map)(int);
@ -425,28 +425,19 @@ static inline void x86_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE);
}
static void intel_pmu_disable_counter(int idx, u64 config)
static inline void x86_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + idx, config);
}
int err;
static void amd_pmu_disable_counter(int idx, u64 config)
{
wrmsrl(MSR_K7_EVNTSEL0 + idx, config);
}
static void hw_perf_disable(int idx, u64 config)
{
if (unlikely(!perf_counters_initialized))
return;
x86_pmu.disable(idx, config);
err = checking_wrmsrl(hwc->config_base + idx,
hwc->config);
}
static inline void
__pmc_fixed_disable(struct perf_counter *counter,
struct hw_perf_counter *hwc, int __idx)
intel_pmu_disable_fixed(struct hw_perf_counter *hwc, int __idx)
{
int idx = __idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, mask;
@ -460,13 +451,20 @@ __pmc_fixed_disable(struct perf_counter *counter,
}
static inline void
__x86_pmu_disable(struct perf_counter *counter,
struct hw_perf_counter *hwc, int idx)
intel_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL))
__pmc_fixed_disable(counter, hwc, idx);
else
hw_perf_disable(idx, hwc->config);
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
intel_pmu_disable_fixed(hwc, idx);
return;
}
x86_pmu_disable_counter(hwc, idx);
}
static inline void
amd_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
x86_pmu_disable_counter(hwc, idx);
}
static DEFINE_PER_CPU(u64, prev_left[X86_PMC_IDX_MAX]);
@ -551,7 +549,7 @@ static void amd_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
if (cpuc->enabled)
x86_pmu_enable_counter(hwc, idx);
else
amd_pmu_disable_counter(idx, hwc->config);
x86_pmu_disable_counter(hwc, idx);
}
static int
@ -622,7 +620,7 @@ try_generic:
perf_counters_lapic_init(hwc->nmi);
__x86_pmu_disable(counter, hwc, idx);
x86_pmu.disable(hwc, idx);
cpuc->counters[idx] = counter;
set_bit(idx, cpuc->active);
@ -694,7 +692,7 @@ static void x86_pmu_disable(struct perf_counter *counter)
* could reenable again:
*/
clear_bit(idx, cpuc->active);
__x86_pmu_disable(counter, hwc, idx);
x86_pmu.disable(hwc, idx);
/*
* Make sure the cleared pointer becomes visible before we
@ -762,7 +760,7 @@ again:
intel_pmu_save_and_restart(counter);
if (perf_counter_overflow(counter, nmi, regs, 0))
__x86_pmu_disable(counter, &counter->hw, bit);
intel_pmu_disable_counter(&counter->hw, bit);
}
intel_pmu_ack_status(ack);