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From: Leo Yan <leo.yan@arm.com>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>,
	James Clark <james.clark@linaro.org>,
	Anshuman Khandual <anshuman.khandual@arm.com>,
	Yeoreum Yun <yeoreum.yun@arm.com>, Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Tamas Petz <tamas.petz@arm.com>,
	Tamas Zsoldos <tamas.zsoldos@arm.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
	Ian Rogers <irogers@google.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 06/19] coresight: trbe: Refactor syndrome decoding
Date: Tue, 2 Dec 2025 14:24:16 +0000	[thread overview]
Message-ID: <20251202142416.GC724103@e132581.arm.com> (raw)
In-Reply-To: <65c84357-0bda-454f-88c3-623b3ff9d29d@arm.com>

On Tue, Dec 02, 2025 at 11:06:48AM +0000, Suzuki K Poulose wrote:
> Hi Leo
> 
> A couple of minor nits below. Otherwise looks like a nice cleanup
> 
> 
> On 01/12/2025 11:21, Leo Yan wrote:
> > It gives priority to TRBSR_EL1.EA (external abort); an external abort
> > will immediately bail out and return an error.
> > 
> > Next, the syndrome decoding is refactored based on two levels of
> > information: the EC (Event Class) bits and the BSC (Trace Buffer Status
> > Code) bits.
> > 
> > If TRBSR_EL1.EC==0b000000, the driver continues parsing TRBSR_EL1.BSC to
> > identify the specific trace buffer event.  Otherwise, any non-zero
> > TRBSR_EL1.EC is treated as an error.
> > 
> > For error cases, the driver prints an error string and dumps registers
> > for debugging.
> 
> minor nit: Please avoid describing the code, which cod does well.
> Briefly mention what you are doing, giving any additional contexts
> that may not be evident from the code.

Sure, I will note this later.

> e.g:
> 
> "Add support for decoding the syndrome for TRBE, providing a verbose
> description of the code for Fatal/unhandled events.
> While at it add the new definitions from the latest Arm ARM for
> EC and BSC"

Will do this and followed comment.  Thanks for suggestion!

Leo

  reply	other threads:[~2025-12-02 14:24 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-01 11:21 [PATCH 00/19] coresight: trbe: Support trigger and circle buffer modes Leo Yan
2025-12-01 11:21 ` [PATCH 01/19] coresight: trbe: Use helpers for checking errata Leo Yan
2025-12-04 12:08   ` Anshuman Khandual
2025-12-01 11:21 ` [PATCH 02/19] coresight: trbe: Remove redundant disable operation Leo Yan
2025-12-04 12:25   ` Anshuman Khandual
2025-12-01 11:21 ` [PATCH 03/19] coresight: trbe: Remove buffer disabling in trbe_handle_overflow() Leo Yan
2025-12-04 12:31   ` Anshuman Khandual
2025-12-01 11:21 ` [PATCH 04/19] coresight: trbe: Remove set_trbe_disabled() from the enable flow Leo Yan
2025-12-04 12:43   ` Anshuman Khandual
2025-12-04 13:25     ` Leo Yan
2025-12-01 11:21 ` [PATCH 05/19] coresight: trbe: Refactor status clearing Leo Yan
2025-12-04 12:57   ` Anshuman Khandual
2025-12-09 15:29     ` Leo Yan
2025-12-01 11:21 ` [PATCH 06/19] coresight: trbe: Refactor syndrome decoding Leo Yan
2025-12-02 11:06   ` Suzuki K Poulose
2025-12-02 14:24     ` Leo Yan [this message]
2025-12-09 13:17     ` James Clark
2025-12-09 16:06       ` Leo Yan
2025-12-05  4:10   ` Anshuman Khandual
2025-12-09 15:57     ` Leo Yan
2025-12-01 11:21 ` [PATCH 07/19] coresight: trbe: Refactor AUX flag setting Leo Yan
2025-12-02 11:15   ` Suzuki K Poulose
2025-12-02 14:21     ` Leo Yan
2025-12-09 13:37   ` James Clark
2025-12-10 15:43     ` Leo Yan
2025-12-12 14:50       ` James Clark
2025-12-12 15:27         ` Leo Yan
2025-12-12 15:52           ` James Clark
2025-12-01 11:21 ` [PATCH 08/19] coresight: trbe: Use PERF_AUX_FLAG_PARTIAL instead of PERF_AUX_FLAG_COLLISION Leo Yan
2025-12-05  4:28   ` Anshuman Khandual
2025-12-09 13:40     ` James Clark
2025-12-10 16:19       ` Leo Yan
2025-12-01 11:21 ` [PATCH 09/19] coresight: trbe: Add fault action argument to trbe_handle_overflow() Leo Yan
2025-12-01 11:22 ` [PATCH 10/19] coresight: trbe: Always check fault action when updating buffer Leo Yan
2025-12-02 12:00   ` Suzuki K Poulose
2025-12-01 11:22 ` [PATCH 11/19] coresight: trbe: Apply overwrite erratum for only wrap event Leo Yan
2025-12-02 12:05   ` Suzuki K Poulose
2025-12-02 16:56     ` Leo Yan
2025-12-02 17:12       ` Leo Yan
2025-12-01 11:22 ` [PATCH 12/19] coresight: trbe: Calculate size for buffer wrapping Leo Yan
2025-12-01 11:22 ` [PATCH 13/19] coresight: trbe: Remove misleading comment Leo Yan
2025-12-01 11:22 ` [PATCH 14/19] coresight: trbe: Refactor compute_trbe_buffer_limit() Leo Yan
2025-12-01 11:22 ` [PATCH 15/19] coresight: trbe: Add static key for bypassing trigger mode Leo Yan
2025-12-02 12:10   ` Suzuki K Poulose
2025-12-01 11:22 ` [PATCH 16/19] coresight: trbe: Support " Leo Yan
2025-12-01 11:22 ` [PATCH 17/19] coresight: trbe: Enable circle mode for snapshot Leo Yan
2025-12-01 11:22 ` [PATCH 18/19] coresight: trbe: Add kunit tests Leo Yan
2025-12-01 11:22 ` [PATCH 19/19] perf: cs-etm: Set watermark for AUX trace Leo Yan
2025-12-05  4:48   ` Anshuman Khandual
2025-12-09 14:54     ` James Clark
2025-12-10  2:22       ` Anshuman Khandual
2025-12-05  4:53 ` [PATCH 00/19] coresight: trbe: Support trigger and circle buffer modes Anshuman Khandual

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