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Signed-off-by: Ilkka Koskinen --- drivers/perf/arm_cspmu/arm_cspmu.c | 8 ++++++-- drivers/perf/arm_cspmu/arm_cspmu.h | 1 + 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c index a3f1c410b417..88547a2b73e6 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -701,8 +701,12 @@ static void arm_cspmu_write_counter(struct perf_event *event, u64 val) if (use_64b_counter_reg(cspmu)) { offset = counter_offset(sizeof(u64), event->hw.idx); - - writeq(val, cspmu->base1 + offset); + if (!cspmu->impl.split_64bit_access) { + writeq(val, cspmu->base1 + offset); + } else { + writel(lower_32_bits(val), cspmu->base1 + offset); + writel(upper_32_bits(val), cspmu->base1 + offset + 4); + } } else { offset = counter_offset(sizeof(u32), event->hw.idx); diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h index 51323b175a4a..c0412cf2bd97 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -110,6 +110,7 @@ struct arm_cspmu_impl_ops { /* Vendor/implementer descriptor. */ struct arm_cspmu_impl { u32 pmiidr; + bool split_64bit_access; struct arm_cspmu_impl_ops ops; void *ctx; };