[PATCH 0/2] perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores

[Yicong Yang]

From: Yicong Yang <yangyicong at hisilicon.com>

This patchset fixed CPU_CYCLES counting on SMT system. CPU_CYCLES can use
PMCCNTR_EL0 which will count the hardware processor clock rather than the
PE clock (ARM DDI0487 L.b D13.1.3) on SMT cores which fails the users
expectation as CPU_CYCLES (0x0011) is defined to count on each PE cycles.
Fix this by avoid using PMCCNTR_EL0 on SMT cores when counting CPU_CYCLES.

Yicong Yang (2):
  perf: arm_pmuv3: Factor out PMCCNTR_EL0 use conditions
  perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores

 drivers/perf/arm_pmuv3.c | 39 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

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2.24.0