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From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, coresight@lists.linaro.org,
	anshuman.khandual@arm.com, will@kernel.org,
	catalin.marinas@arm.com, james.morse@arm.com,
	mathieu.poirier@linaro.org, mike.leach@linaro.org,
	leo.yan@linaro.org, maz@kernel.org, mark.rutland@arm.com,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH 03/10] coresight: trbe: Add a helper to pad a given buffer area
Date: Wed, 28 Jul 2021 14:52:10 +0100	[thread overview]
Message-ID: <20210728135217.591173-4-suzuki.poulose@arm.com> (raw)
In-Reply-To: <20210728135217.591173-1-suzuki.poulose@arm.com>

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);
 }
-- 
2.24.1


  parent reply	other threads:[~2021-07-28 13:54 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-28 13:52 [PATCH 00/10] arm64: Self-hosted trace related erratum workarouds Suzuki K Poulose
2021-07-28 13:52 ` [PATCH 01/10] coresight: trbe: Add infrastructure for Errata handling Suzuki K Poulose
2021-08-02  6:43   ` Anshuman Khandual
2021-09-07  9:04     ` Suzuki K Poulose
2021-09-09  2:55       ` Anshuman Khandual
2021-07-28 13:52 ` [PATCH 02/10] coresight: trbe: Add a helper to calculate the trace generated Suzuki K Poulose
2021-07-30 10:01   ` Anshuman Khandual
2021-07-28 13:52 ` Suzuki K Poulose [this message]
2021-07-30 10:05   ` [PATCH 03/10] coresight: trbe: Add a helper to pad a given buffer area Anshuman Khandual
2021-07-28 13:52 ` [PATCH 04/10] coresight: trbe: Decouple buffer base from the hardware base Suzuki K Poulose
2021-07-30 10:53   ` Anshuman Khandual
2021-07-28 13:52 ` [PATCH 05/10] coresight: trbe: Allow driver to choose a different alignment Suzuki K Poulose
2021-07-30 11:02   ` Anshuman Khandual
2021-07-30 14:29     ` Suzuki K Poulose
2021-07-28 13:52 ` [PATCH 06/10] arm64: Add Neoverse-N2, Cortex-A710 CPU part definition Suzuki K Poulose
2021-07-30 11:26   ` Anshuman Khandual
2021-07-30 14:31     ` Suzuki K Poulose
2021-08-02 11:21   ` Catalin Marinas
2021-08-02 11:21   ` Catalin Marinas
2021-07-28 13:52 ` [PATCH 07/10] arm64: Add erratum detection for TRBE overwrite in FILL mode Suzuki K Poulose
2021-08-02  7:44   ` Anshuman Khandual
2021-08-02 11:22   ` Catalin Marinas
2021-08-06 12:44   ` Linu Cherian
2021-09-07  9:10     ` Suzuki K Poulose
2021-07-28 13:52 ` [PATCH 08/10] coresight: trbe: Workaround TRBE errat " Suzuki K Poulose
2021-08-03 10:25   ` Anshuman Khandual
2021-09-07  9:58     ` Suzuki K Poulose
2021-09-09  4:21       ` Anshuman Khandual
2021-09-09  8:37         ` Suzuki K Poulose
2021-08-06 16:09   ` Linu Cherian
2021-09-07  9:18     ` Suzuki K Poulose
2021-07-28 13:52 ` [PATCH 09/10] arm64: Enable workaround for TRBE " Suzuki K Poulose
2021-08-02  9:34   ` Anshuman Khandual
2021-08-02 11:24   ` Catalin Marinas
2021-07-28 13:52 ` [PATCH 10/10] arm64: errata: Add workaround for TSB flush failures Suzuki K Poulose
2021-07-29  9:55   ` Marc Zyngier
2021-07-29 10:41     ` Suzuki K Poulose
2021-08-02  9:12       ` Anshuman Khandual
2021-08-02  9:35         ` Marc Zyngier
2021-08-03  3:51           ` Anshuman Khandual
2021-09-08 13:39             ` Suzuki K Poulose
2021-08-02 11:27   ` Catalin Marinas

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