linux-kernel - [PATCH 3/3] perf cs-etm: Update deduction of TRCCONFIGR register for branch broadcast

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: <20211208160907.749482-3-james.clark@arm.com>
Date:   Wed,  8 Dec 2021 16:09:07 +0000
From:   James Clark <james.clark@....com>
To:     mathieu.poirier@...aro.org, coresight@...ts.linaro.org
Cc:     suzuki.poulose@....com, James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org
Subject: [PATCH 3/3] perf cs-etm: Update deduction of TRCCONFIGR register for branch broadcast

Now that a config flag for branch broadcast has been added, take it into
account when trying to deduce what the driver would have programmed the
TRCCONFIGR register to.

Signed-off-by: James Clark <james.clark@....com>
---
 tools/include/linux/coresight-pmu.h | 2 ++
 tools/perf/arch/arm/util/cs-etm.c   | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/tools/include/linux/coresight-pmu.h b/tools/include/linux/coresight-pmu.h
index 4ac5c081af93..6c2fd6cc5a98 100644
--- a/tools/include/linux/coresight-pmu.h
+++ b/tools/include/linux/coresight-pmu.h
@@ -18,6 +18,7 @@
  * ETMv3.5/PTM doesn't define ETMCR config bits with prefix "ETM3_" and
  * directly use below macros as config bits.
  */
+#define ETM_OPT_BRANCH_BROADCAST 8
 #define ETM_OPT_CYCACC		12
 #define ETM_OPT_CTXTID		14
 #define ETM_OPT_CTXTID2		15
@@ -25,6 +26,7 @@
 #define ETM_OPT_RETSTK		29
 
 /* ETMv4 CONFIGR programming bits for the ETM OPTs */
+#define ETM4_CFG_BIT_BB         3
 #define ETM4_CFG_BIT_CYCACC	4
 #define ETM4_CFG_BIT_CTXTID	6
 #define ETM4_CFG_BIT_VMID	7
diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index 293a23bf8be3..c7ef4e9b4a3a 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -527,6 +527,9 @@ static u64 cs_etmv4_get_config(struct auxtrace_record *itr)
 	if (config_opts & BIT(ETM_OPT_CTXTID2))
 		config |= BIT(ETM4_CFG_BIT_VMID) |
 			  BIT(ETM4_CFG_BIT_VMID_OPT);
+	if (config_opts & BIT(ETM_OPT_BRANCH_BROADCAST))
+		config |= BIT(ETM4_CFG_BIT_BB);
+
 	return config;
 }
 
-- 
2.28.0