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author | Suzuki K. Poulose <suzuki.poulose@arm.com> | 2015-03-18 12:24:42 +0000 |
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committer | Will Deacon <will.deacon@arm.com> | 2015-03-27 13:45:02 +0000 |
commit | 874c571414d5617f4042298986b6a826816ee885 (patch) | |
tree | 3098e8962b192f2669845b09fab68d553fa168f6 /REPORTING-BUGS | |
parent | ee8e5d5fbec0e880b18bbdbfe12de53ab1dec21f (diff) | |
download | op-kernel-dev-874c571414d5617f4042298986b6a826816ee885.zip op-kernel-dev-874c571414d5617f4042298986b6a826816ee885.tar.gz |
arm-cci: Fix CCI PMU event validation
We mask the event with the CCI_PMU_EVENT_MASK, before passing
the config to pmu_validate_hw_event(), which causes extra bits
to be ignored and qualifies an invalid event code as valid.
e.g,
$ perf stat -a -C 0 -e CCI_400/config=0x1ff,name=cycles/ sleep 1
Performance counter stats for 'system wide':
506951142 cycles
1.013879626 seconds time elapsed
where, cycles has an event coding of 0xff. This patch also removes
the unnecessary 'event' mask in pmu_write_register, since the config_base
is set by the pmu code after the event is validated.
Acked-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'REPORTING-BUGS')
0 files changed, 0 insertions, 0 deletions