From: Yeoreum Yun <yeoreum.yun@arm•com>
To: coresight@lists•linaro.org, linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org
Cc: suzuki.poulose@arm•com, mike.leach@arm•com,
james.clark@linaro•org, alexander.shishkin@linux•intel.com,
leo.yan@arm•com, jie.gan@oss•qualcomm.com,
Yeoreum Yun <yeoreum.yun@arm•com>
Subject: [PATCH v7 01/13] coresight: etm4x: fix wrong check of etm4x_sspcicrn_present()
Date: Tue, 19 May 2026 16:48:00 +0100 [thread overview]
Message-ID: <20260519154812.254884-2-yeoreum.yun@arm.com> (raw)
In-Reply-To: <20260519154812.254884-1-yeoreum.yun@arm.com>
According to Embedded Trace Macrocell Architecture Specification
ETMv4.0 to ETM4.6 [0], TRCSSPCICR<n> is present only if all of
the following are true:
- TRCIDR4.NUMSSCC > n.
- TRCIDR4.NUMPC > 0b0000.
- TRCSSCSR<n>.PC == 0b1.
Comment for etm4x_sspcicrn_present() is align with the specification.
However, the check should use drvdata->nr_pe_cmp to check TRCIDR4.NUMPC
not nr_pe.
Link: https://developer.arm.com/documentation/ihi0064/latest/ [0]
Fixes: f6a18f354c58 ("coresight: etm4x: Handle access to TRCSSPCICRn")
Reviewed-by: Leo Yan <leo.yan@arm•com>
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm•com>
---
drivers/hwtracing/coresight/coresight-etm4x-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 14bb31bd6a0b..1e3b0344dc00 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -93,7 +93,7 @@ static int etm4_probe_cpu(unsigned int cpu);
static bool etm4x_sspcicrn_present(struct etmv4_drvdata *drvdata, int n)
{
return (n < drvdata->nr_ss_cmp) &&
- drvdata->nr_pe &&
+ drvdata->nr_pe_cmp &&
(drvdata->config.ss_status[n] & TRCSSCSRn_PC);
}
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
next prev parent reply other threads:[~2026-05-19 15:48 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-19 15:47 [PATCH v7 00/13] fix several inconsistencies with sysfs configuration in etmX Yeoreum Yun
2026-05-19 15:48 ` Yeoreum Yun [this message]
2026-05-19 15:48 ` [PATCH v7 02/13] coresight: etm4x: fix underflow for nrseqstate Yeoreum Yun
2026-06-01 9:40 ` Suzuki K Poulose
2026-06-01 10:08 ` Yeoreum Yun
2026-06-01 10:13 ` Suzuki K Poulose
2026-06-01 10:15 ` Yeoreum Yun
2026-06-01 9:52 ` Suzuki K Poulose
2026-06-01 10:12 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 03/13] coresight: etm4x: introduce ETM_MAX_SEQ_TRANSITIONS Yeoreum Yun
2026-05-28 12:58 ` Leo Yan
2026-05-28 13:47 ` Yeoreum Yun
2026-06-01 9:53 ` Suzuki K Poulose
2026-06-01 11:14 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 04/13] coresight: etm4x: introduce struct etm4_caps Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 05/13] coresight: etm4x: exclude ss_status from drvdata->config Yeoreum Yun
2026-05-28 13:30 ` Leo Yan
2026-05-28 13:46 ` Yeoreum Yun
2026-06-01 11:27 ` Suzuki K Poulose
2026-06-01 11:52 ` Yeoreum Yun
2026-06-04 9:15 ` Suzuki K Poulose
2026-05-19 15:48 ` [PATCH v7 06/13] coresight: etm4x: remove redundant fields in etmv4_save_state Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 07/13] coresight: etm4x: fix leaked trace id Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 08/13] coresight: etm4x: fix inconsistencies with sysfs configuration Yeoreum Yun
2026-05-28 14:09 ` Leo Yan
2026-05-28 14:26 ` Yeoreum Yun
2026-05-28 14:56 ` Leo Yan
2026-05-28 15:22 ` Yeoreum Yun
2026-06-01 15:38 ` Suzuki K Poulose
2026-05-19 15:48 ` [PATCH v7 09/13] coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable Yeoreum Yun
2026-05-28 14:33 ` Leo Yan
2026-05-28 14:43 ` Yeoreum Yun
2026-05-28 15:26 ` Leo Yan
2026-05-28 16:01 ` Yeoreum Yun
2026-06-01 16:11 ` Suzuki K Poulose
2026-06-01 16:41 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 10/13] coresight: etm3x: change drvdata->spinlock type to raw_spin_lock_t Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 11/13] coresight: etm3x: introduce struct etm_caps Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 12/13] coresight: etm3x: fix inconsistencies with sysfs configuration Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 13/13] coresight: etm3x: remove redundant cpu online check on etm_enable_sysfs() Yeoreum Yun
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260519154812.254884-2-yeoreum.yun@arm.com \
--to=yeoreum.yun@arm$(echo .)com \
--cc=alexander.shishkin@linux$(echo .)intel.com \
--cc=coresight@lists$(echo .)linaro.org \
--cc=james.clark@linaro$(echo .)org \
--cc=jie.gan@oss$(echo .)qualcomm.com \
--cc=leo.yan@arm$(echo .)com \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=mike.leach@arm$(echo .)com \
--cc=suzuki.poulose@arm$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox