linux-kernel - [PATCH v4 13/21] perf arm-spe: Refactor counter packet handling

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: <20201027030917.15404-14-leo.yan@linaro.org>
Date:   Tue, 27 Oct 2020 11:09:09 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Andre Przywara <andre.przywara@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Wei Li <liwei391@...wei.com>,
        James Clark <james.clark@....com>, Al Grant <Al.Grant@....com>,
        Dave Martin <Dave.Martin@....com>, linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v4 13/21] perf arm-spe: Refactor counter packet handling

This patch defines macros for counter packet header, and uses macros to
replace hard code values in functions arm_spe_get_counter() and
arm_spe_pkt_desc().

In the function arm_spe_get_counter(), adds a new line for more
readable.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c | 11 ++++++-----
 tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h |  5 +++++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
index 8f481c6ea054..4be649c26002 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.c
@@ -152,10 +152,11 @@ static int arm_spe_get_counter(const unsigned char *buf, size_t len,
 			       const unsigned char ext_hdr, struct arm_spe_pkt *packet)
 {
 	packet->type = ARM_SPE_COUNTER;
+
 	if (ext_hdr)
-		packet->index = ((buf[0] & 0x3) << 3) | (buf[1] & 0x7);
+		packet->index = SPE_HDR_EXTENDED_INDEX(buf[0], buf[1]);
 	else
-		packet->index = buf[0] & 0x7;
+		packet->index = SPE_HDR_SHORT_INDEX(buf[0]);
 
 	return arm_spe_get_payload(buf, len, ext_hdr, packet);
 }
@@ -307,17 +308,17 @@ static int arm_spe_pkt_desc_counter(const struct arm_spe_pkt *packet,
 		return ret;
 
 	switch (packet->index) {
-	case 0:
+	case SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT:
 		ret = arm_spe_pkt_snprintf(&buf, &blen, "TOT");
 		if (ret < 0)
 			return ret;
 		break;
-	case 1:
+	case SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT:
 		ret = arm_spe_pkt_snprintf(&buf, &blen, "ISSUE");
 		if (ret < 0)
 			return ret;
 		break;
-	case 2:
+	case SPE_CNT_PKT_HDR_INDEX_TRANS_LAT:
 		ret = arm_spe_pkt_snprintf(&buf, &blen, "XLAT");
 		if (ret < 0)
 			return ret;
diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
index 9bc876bffd35..7d8e34e35f05 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-pkt-decoder.h
@@ -82,6 +82,11 @@ struct arm_spe_pkt {
 /* Context packet header */
 #define SPE_CTX_PKT_HDR_INDEX(h)		((h) & GENMASK_ULL(1, 0))
 
+/* Counter packet header */
+#define SPE_CNT_PKT_HDR_INDEX_TOTAL_LAT		0x0
+#define SPE_CNT_PKT_HDR_INDEX_ISSUE_LAT		0x1
+#define SPE_CNT_PKT_HDR_INDEX_TRANS_LAT		0x2
+
 const char *arm_spe_pkt_name(enum arm_spe_pkt_type);
 
 int arm_spe_get_packet(const unsigned char *buf, size_t len,
-- 
2.17.1