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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@intel.com>
Cc: Jiri Olsa <jolsa@redhat.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@redhat.com>
This commit is contained in:
Adrian Hunter 2015-07-17 19:33:59 +03:00 committed by Arnaldo Carvalho de Melo
parent 0de802abd1
commit 7eacca3ebb
1 changed files with 11 additions and 0 deletions
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11
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
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@ -1572,6 +1572,10 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder)
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: