linux-kernel - [tip:perf/core] perf tools: Add Intel PT support for decoding TRACESTOP packets

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Message-ID: <tip-7eacca3ebb03a4ee7bb41284aafeb19a54242621@git.kernel.org>
Date:	Thu, 27 Aug 2015 23:40:19 -0700
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, acme@...hat.com, mingo@...nel.org,
	adrian.hunter@...el.com, linux-kernel@...r.kernel.org,
	jolsa@...hat.com, tglx@...utronix.de
Subject: [tip:perf/core] perf tools:
  Add Intel PT support for decoding TRACESTOP packets

Commit-ID:  7eacca3ebb03a4ee7bb41284aafeb19a54242621
Gitweb:     http://git.kernel.org/tip/7eacca3ebb03a4ee7bb41284aafeb19a54242621
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 17 Jul 2015 19:33:59 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 24 Aug 2015 17:50:23 -0300

perf tools: Add Intel PT support for decoding TRACESTOP packets

A TRACESTOP packet is produced when an Intel PT trace enters a defined
region of the address space at which point the tracing stops.

This patch just adds decoder support.

Support for specifying TRACESTOP regions is left until later.

For details refer to the June 2015 or later Intel 64 and IA-32
Architectures SDM Chapter 36 Intel Processor Trace.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-25-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-decoder.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

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 0845c5e..22ba502 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1572,6 +1572,10 @@ next:
 			return intel_pt_walk_fup_tip(decoder);
 
 		case INTEL_PT_TRACESTOP:
+			decoder->pge = false;
+			decoder->continuous_period = false;
+			intel_pt_clear_tx_flags(decoder);
+			decoder->have_tma = false;
 			break;
 
 		case INTEL_PT_PSB:
@@ -1717,6 +1721,9 @@ static int intel_pt_walk_psb(struct intel_pt_decoder *decoder)
 			break;
 
 		case INTEL_PT_TRACESTOP:
+			decoder->pge = false;
+			decoder->continuous_period = false;
+			intel_pt_clear_tx_flags(decoder);
 		case INTEL_PT_TNT:
 			decoder->have_tma = false;
 			intel_pt_log("ERROR: Unexpected packet\n");
@@ -1819,6 +1826,10 @@ static int intel_pt_walk_to_ip(struct intel_pt_decoder *decoder)
 			return intel_pt_bug(decoder);
 
 		case INTEL_PT_TRACESTOP:
+			decoder->pge = false;
+			decoder->continuous_period = false;
+			intel_pt_clear_tx_flags(decoder);
+			decoder->have_tma = false;
 			break;
 
 		case INTEL_PT_PSB:
--
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