Messages in this thread | | | Subject | Re: [PATCH 03/10] coresight: trbe: Add a helper to pad a given buffer area | From | Anshuman Khandual <> | Date | Fri, 30 Jul 2021 15:35:51 +0530 |
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On 7/28/21 7:22 PM, Suzuki K Poulose wrote: > Refactor the helper to pad a given AUX buffer area to allow > "filling" ignore packets, without moving any handle pointers. > This will be useful in working around errata, where we may > have to fill the buffer after a session. > > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> > --- > drivers/hwtracing/coresight/coresight-trbe.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c > index a0168ad204b3..0af644331b99 100644 > --- a/drivers/hwtracing/coresight/coresight-trbe.c > +++ b/drivers/hwtracing/coresight/coresight-trbe.c > @@ -228,12 +228,18 @@ static void trbe_stop_and_truncate_event(struct perf_output_handle *handle) > * consumed from the user space. The enabled TRBE buffer area is a moving subset of > * the allocated perf auxiliary buffer. > */ > + > +static void __trbe_pad_buf(struct trbe_buf *buf, u64 offset, int len) > +{ > + memset((void *)buf->trbe_base + offset, ETE_IGNORE_PACKET, len); > +} > + > static void trbe_pad_buf(struct perf_output_handle *handle, int len) > { > struct trbe_buf *buf = etm_perf_sink_config(handle); > u64 head = PERF_IDX2OFF(handle->head, buf); > > - memset((void *)buf->trbe_base + head, ETE_IGNORE_PACKET, len); > + __trbe_pad_buf(buf, head, len); > if (!buf->snapshot) > perf_aux_output_skip(handle, len); > } >
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
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