linux-kernel - [PATCH v5 18/25] coresight: etm4x: Expose trcdevarch via trcidr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201214173731.302520-19-suzuki.poulose@arm.com>
Date:   Mon, 14 Dec 2020 17:37:24 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, catalin.marinas@....com,
        mathieu.poirier@...aro.org, mike.leach@...aro.org,
        leo.yan@...aro.org, jonathan.zhouwen@...wei.com,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH v5 18/25] coresight: etm4x: Expose trcdevarch via trcidr

Expose the TRCDEVARCH register via the sysfs for component
detection. Given that the TRCIDR1 may not completely identify
the ETM component and instead need to use TRCDEVARCH, expose
this via sysfs for tools to use it for identification.

Cc: Mike Leach <mike.leach@...aro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
index 009818675928..277fd5bff811 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
@@ -2395,6 +2395,7 @@ coresight_etm4x_cross_read(trcidr10, TRCIDR10);
 coresight_etm4x_cross_read(trcidr11, TRCIDR11);
 coresight_etm4x_cross_read(trcidr12, TRCIDR12);
 coresight_etm4x_cross_read(trcidr13, TRCIDR13);
+coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH);
 
 static struct attribute *coresight_etmv4_trcidr_attrs[] = {
 	&dev_attr_trcidr0.attr,
@@ -2410,6 +2411,7 @@ static struct attribute *coresight_etmv4_trcidr_attrs[] = {
 	&dev_attr_trcidr11.attr,
 	&dev_attr_trcidr12.attr,
 	&dev_attr_trcidr13.attr,
+	&dev_attr_trcdevarch.attr,
 	NULL,
 };
 
-- 
2.24.1