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perf, x86: Calculate perfctr msr addresses in helper functions

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This patch adds helper functions to calculate perfctr msr addresses.
We need this to later add support for AMD family 15h cpus. For this we
have to change the algorithms to generate the perfctr's msr addresses.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1296664860-10886-3-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter 2011-02-02 17:40:57 +01:00 committed by Ingo Molnar
parent d45dd923fc
commit 41bf498949
2 changed files with 25 additions and 15 deletions
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36
arch/x86/kernel/cpu/perf_event.c
View file

@ -321,6 +321,16 @@ x86_perf_event_update(struct perf_event *event)
return new_raw_count;
}
static inline unsigned int x86_pmu_config_addr(int index)
{
return x86_pmu.eventsel + index;
}
static inline unsigned int x86_pmu_event_addr(int index)
{
return x86_pmu.perfctr + index;
}
static atomic_t active_events;
static DEFINE_MUTEX(pmc_reserve_mutex);
@ -331,12 +341,12 @@ static bool reserve_pmc_hardware(void)
int i;
for (i = 0; i < x86_pmu.num_counters; i++) {
if (!reserve_perfctr_nmi(x86_pmu.perfctr + i))
if (!reserve_perfctr_nmi(x86_pmu_event_addr(i)))
goto perfctr_fail;
}
for (i = 0; i < x86_pmu.num_counters; i++) {
if (!reserve_evntsel_nmi(x86_pmu.eventsel + i))
if (!reserve_evntsel_nmi(x86_pmu_config_addr(i)))
goto eventsel_fail;
}
@ -344,13 +354,13 @@ static bool reserve_pmc_hardware(void)
eventsel_fail:
for (i--; i >= 0; i--)
release_evntsel_nmi(x86_pmu.eventsel + i);
release_evntsel_nmi(x86_pmu_config_addr(i));
i = x86_pmu.num_counters;
perfctr_fail:
for (i--; i >= 0; i--)
release_perfctr_nmi(x86_pmu.perfctr + i);
release_perfctr_nmi(x86_pmu_event_addr(i));
return false;
}
@ -360,8 +370,8 @@ static void release_pmc_hardware(void)
int i;
for (i = 0; i < x86_pmu.num_counters; i++) {
release_perfctr_nmi(x86_pmu.perfctr + i);
release_evntsel_nmi(x86_pmu.eventsel + i);
release_perfctr_nmi(x86_pmu_event_addr(i));
release_evntsel_nmi(x86_pmu_config_addr(i));
}
}
@ -382,7 +392,7 @@ static bool check_hw_exists(void)
* complain and bail.
*/
for (i = 0; i < x86_pmu.num_counters; i++) {
reg = x86_pmu.eventsel + i;
reg = x86_pmu_config_addr(i);
ret = rdmsrl_safe(reg, &val);
if (ret)
goto msr_fail;
@ -407,8 +417,8 @@ static bool check_hw_exists(void)
* that don't trap on the MSR access and always return 0s.
*/
val = 0xabcdUL;
ret = checking_wrmsrl(x86_pmu.perfctr, val);
ret |= rdmsrl_safe(x86_pmu.perfctr, &val_new);
ret = checking_wrmsrl(x86_pmu_event_addr(0), val);
ret |= rdmsrl_safe(x86_pmu_event_addr(0), &val_new);
if (ret || val != val_new)
goto msr_fail;
@ -617,11 +627,11 @@ static void x86_pmu_disable_all(void)
if (!test_bit(idx, cpuc->active_mask))
continue;
rdmsrl(x86_pmu.eventsel + idx, val);
rdmsrl(x86_pmu_config_addr(idx), val);
if (!(val & ARCH_PERFMON_EVENTSEL_ENABLE))
continue;
val &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
wrmsrl(x86_pmu.eventsel + idx, val);
wrmsrl(x86_pmu_config_addr(idx), val);
}
}
@ -1110,8 +1120,8 @@ void perf_event_print_debug(void)
pr_info("CPU#%d: active: %016llx\n", cpu, *(u64 *)cpuc->active_mask);
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
rdmsrl(x86_pmu.eventsel + idx, pmc_ctrl);
rdmsrl(x86_pmu.perfctr + idx, pmc_count);
rdmsrl(x86_pmu_config_addr(idx), pmc_ctrl);
rdmsrl(x86_pmu_event_addr(idx), pmc_count);
prev_left = per_cpu(pmc_prev_left[idx], cpu);

4
arch/x86/kernel/cpu/perf_event_intel.c
View file

@ -691,8 +691,8 @@ static void intel_pmu_reset(void)
printk("clearing PMU state on CPU#%d\n", smp_processor_id());
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
checking_wrmsrl(x86_pmu.eventsel + idx, 0ull);
checking_wrmsrl(x86_pmu.perfctr + idx, 0ull);
checking_wrmsrl(x86_pmu_config_addr(idx), 0ull);
checking_wrmsrl(x86_pmu_event_addr(idx), 0ull);
}
for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++)
checking_wrmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull);