linux

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Hoan Tran cbb72a3c19 drivers/perf: xgene: Add CPU hotplug support

If the CPU assigned to the xgene PMU is taken offline, then subsequent
perf invocations on the PMU will fail:

  # echo 0 > /sys/devices/system/cpu/cpu0/online
  # perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1
    Error:
    The sys_perf_event_open() syscall returned with 19 (No such device) for event (l3c0/cycle-count/).
    /bin/dmesg may provide additional information.
    No CONFIG_PERF_EVENTS=y kernel support configured?

This patch implements a hotplug notifier in the xgene PMU driver so that
the PMU context is migrated to another online CPU should its assigned
CPU disappear.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Hoan Tran <hoan.tran@amperecomputing.com>
[will: Made naming of new cpuhp_state enum entry consistent]
Signed-off-by: Will Deacon <will.deacon@arm.com>

2018-11-21 16:28:00 +00:00

hisilicon

drivers/perf: hisi: update the sccl_id/ccl_id when MT is supported

2018-07-24 15:40:43 +01:00

arm_dsu_pmu.c

perf: Fix sibling iteration

2018-03-16 20:44:12 +01:00

arm_pmu_acpi.c

arm_pmu: acpi: request IRQs up-front

2018-02-20 11:34:54 +00:00

arm_pmu_platform.c

perf: Convert to using %pOFn instead of device_node.name