[PATCH V2 14/37] perf intel-pt: Add reserved byte to CBR packet payload

From	Adrian Hunter <adrian.hunter@intel.com>
Newsgroups	linux.kernel
Subject	[PATCH V2 14/37] perf intel-pt: Add reserved byte to CBR packet payload
Date	2017-05-26 10:30 +0200
Message-ID	<tLiNe-3tM-81@gated-at.bofh.it> (permalink)
References	<tLiNb-3tM-9@gated-at.bofh.it>
Organization	Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki

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Future proof CBR packet decoding by passing through also the undefined
'reserved' byte in the packet payload.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 tools/perf/util/intel-pt-decoder/intel-pt-decoder.c     | 2 +-
 tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index e42804d10001..96bf8d8e83c0 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1444,7 +1444,7 @@ static void intel_pt_calc_mtc_timestamp(struct intel_pt_decoder *decoder)
 
 static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)
 {
-	unsigned int cbr = decoder->packet.payload;
+	unsigned int cbr = decoder->packet.payload & 0xff;
 
 	if (decoder->cbr == cbr)
 		return;
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 accdb646a03d..ba4c9dd18643 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
@@ -130,7 +130,7 @@ static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
 	if (len < 4)
 		return INTEL_PT_NEED_MORE_BYTES;
 	packet->type = INTEL_PT_CBR;
-	packet->payload = buf[2];
+	packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
 	return 4;
 }
 
-- 
1.9.1

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[PATCH V2 14/37] perf intel-pt: Add reserved byte to CBR packet payload Adrian Hunter <adrian.hunter@intel.com> - 2017-05-26 10:30 +0200

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