linux-kernel - [tip:perf/urgent] perf intel-pt: Fix packet decoding of CYC packets

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Message-ID: <tip-621a5a327c1e36ffd7bb567f44a559f64f76358f@git.kernel.org>
Date:   Mon, 25 Jun 2018 23:54:17 -0700
From:   tip-bot for Adrian Hunter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, acme@...hat.com, adrian.hunter@...el.com,
        mingo@...nel.org, linux-kernel@...r.kernel.org, jolsa@...hat.com,
        hpa@...or.com
Subject: [tip:perf/urgent] perf intel-pt: Fix packet decoding of CYC packets

Commit-ID:  621a5a327c1e36ffd7bb567f44a559f64f76358f
Gitweb:     https://git.kernel.org/tip/621a5a327c1e36ffd7bb567f44a559f64f76358f
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Thu, 7 Jun 2018 14:30:02 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 25 Jun 2018 11:59:36 -0300

perf intel-pt: Fix packet decoding of CYC packets

Use a 64-bit type so that the cycle count is not limited to 32-bits.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: stable@...r.kernel.org
Link: http://lkml.kernel.org/r/1528371002-8862-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
index ba4c9dd18643..d426761a549d 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -366,7 +366,7 @@ static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf,
 		if (len < offs)
 			return INTEL_PT_NEED_MORE_BYTES;
 		byte = buf[offs++];
-		payload |= (byte >> 1) << shift;
+		payload |= ((uint64_t)byte >> 1) << shift;
 	}
 
 	packet->type = INTEL_PT_CYC;