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Subject[PATCH 66/85] perf intel-pt: Add lookahead callback
Date
From: Adrian Hunter <adrian.hunter@intel.com>

Add a callback function to enable the decoder to lookahead at subsequent
trace buffers. This will be used to implement a "fast forward" facility
which will be needed to support efficient time interval filtering.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 ++
tools/perf/util/intel-pt-decoder/intel-pt-decoder.h | 3 +++
2 files changed, 5 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 9eb778f9c911..13123b195083 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -104,6 +104,7 @@ struct intel_pt_decoder {
uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,
uint64_t max_insn_cnt, void *data);
bool (*pgd_ip)(uint64_t ip, void *data);
+ int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);
void *data;
struct intel_pt_state state;
const unsigned char *buf;
@@ -233,6 +234,7 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params)
decoder->get_trace = params->get_trace;
decoder->walk_insn = params->walk_insn;
decoder->pgd_ip = params->pgd_ip;
+ decoder->lookahead = params->lookahead;
decoder->data = params->data;
decoder->return_compression = params->return_compression;
decoder->branch_enable = params->branch_enable;
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
index 6a61773dc44b..de36254c6ac9 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h
@@ -102,12 +102,15 @@ struct intel_pt_buffer {
uint64_t trace_nr;
};

+typedef int (*intel_pt_lookahead_cb_t)(struct intel_pt_buffer *, void *);
+
struct intel_pt_params {
int (*get_trace)(struct intel_pt_buffer *buffer, void *data);
int (*walk_insn)(struct intel_pt_insn *intel_pt_insn,
uint64_t *insn_cnt_ptr, uint64_t *ip, uint64_t to_ip,
uint64_t max_insn_cnt, void *data);
bool (*pgd_ip)(uint64_t ip, void *data);
+ int (*lookahead)(void *data, intel_pt_lookahead_cb_t cb, void *cb_data);
void *data;
bool return_compression;
bool branch_enable;
--
2.20.1
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