Perf: arm64: restore registers after reset
Reset will overwrite registers written by restore_pm_registers, so order the calls correctly. Change-Id: I8210d61c2f4c2397efb2de801d94ed1d5aad480c Signed-off-by: Neil Leeder <nleeder@codeaurora.org> [satyap: merge conflict resolution and move changes in arch/arm64/kernel/perf_event.c to drivers/perf/arm_pmu.c to align with kernel 4.4] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
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2 changed files with 4 additions and 2 deletions
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@ -31,6 +31,7 @@ static char *descriptions =
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"10 Perf: arm64: tracectr: initialize counts after hotplug\n"
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"11 Perf: arm64: Refine disable/enable in tracecounters\n"
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"12 Perf: arm64: fix disable of pmu irq during hotplug\n"
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"13 Perf: arm64: restore registers after reset\n"
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"15 Perf: arm64: make debug dir handle exportable\n"
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"16 Perf: arm64: add perf trace user\n"
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"17 Perf: arm64: add support for kryo pmu\n"
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@ -858,15 +858,16 @@ static int perf_cpu_pm_notifier(struct notifier_block *self, unsigned long cmd,
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case CPU_PM_ENTER_FAILED:
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case CPU_PM_EXIT:
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if (cpu_has_active_perf(cpu, cpu_pmu) && cpu_pmu->reset)
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cpu_pmu->reset(NULL);
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if (cpu_pmu->restore_pm_registers)
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cpu_pmu->restore_pm_registers((void *)lcpu);
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if (cpu_has_active_perf(cpu, cpu_pmu) && cpu_pmu->reset) {
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if (cpu_has_active_perf(cpu, cpu_pmu)) {
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/*
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* Flip this bit so armpmu_enable knows it needs
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* to re-enable active counters.
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*/
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get_cpu_var(from_idle) = 1;
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cpu_pmu->reset(NULL);
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pmu = &cpu_pmu->pmu;
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pmu->pmu_enable(pmu);
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}
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