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author | Thomas Gleixner <tglx@linutronix.de> | 2016-07-13 17:16:20 +0000 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2016-07-14 09:34:37 +0200 |
commit | 57ecde42cc7493fb74029918d0a8f97aec854876 (patch) | |
tree | 005f8386b43ad618480c76983686d8cf66cfba56 | |
parent | a409f5ee2937cb15b4af485fa98b90946d9bea3a (diff) | |
download | op-kernel-dev-57ecde42cc7493fb74029918d0a8f97aec854876.zip op-kernel-dev-57ecde42cc7493fb74029918d0a8f97aec854876.tar.gz |
powerpc/perf: Convert book3s notifier to state machine callbacks
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153334.345786236@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r-- | arch/powerpc/perf/core-book3s.c | 30 | ||||
-rw-r--r-- | include/linux/cpuhotplug.h | 1 |
2 files changed, 8 insertions, 23 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 97a1d40..ffd61d5 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -2158,31 +2158,15 @@ static void perf_event_interrupt(struct pt_regs *regs) irq_exit(); } -static void power_pmu_setup(int cpu) +int power_pmu_prepare_cpu(unsigned int cpu) { struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu); - if (!ppmu) - return; - memset(cpuhw, 0, sizeof(*cpuhw)); - cpuhw->mmcr[0] = MMCR0_FC; -} - -static int -power_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) -{ - unsigned int cpu = (long)hcpu; - - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_UP_PREPARE: - power_pmu_setup(cpu); - break; - - default: - break; + if (ppmu) { + memset(cpuhw, 0, sizeof(*cpuhw)); + cpuhw->mmcr[0] = MMCR0_FC; } - - return NOTIFY_OK; + return 0; } int register_power_pmu(struct power_pmu *pmu) @@ -2205,7 +2189,7 @@ int register_power_pmu(struct power_pmu *pmu) #endif /* CONFIG_PPC64 */ perf_pmu_register(&power_pmu, "cpu", PERF_TYPE_RAW); - perf_cpu_notifier(power_pmu_notifier); - + cpuhp_setup_state(CPUHP_PERF_POWER, "PERF_POWER", + power_pmu_prepare_cpu, NULL); return 0; } diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index d54973e..b265e99 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -10,6 +10,7 @@ enum cpuhp_state { CPUHP_PERF_X86_AMD_UNCORE_PREP, CPUHP_PERF_X86_RAPL_PREP, CPUHP_PERF_BFIN, + CPUHP_PERF_POWER, CPUHP_NOTIFY_PREPARE, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD, |