perf intel-pt: Fix packet decoding of CYC packets

commit 621a5a327c1e36ffd7bb567f44a559f64f76358f upstream.

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

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.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@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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 ba4c9dd..d426761 100644 (file)
--- 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;