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| author |  Adrian Hunter <adrian.hunter@intel.com>
| 2021-04-30 10:03:05 +0300 |
|---|---|---|
| committer |  Arnaldo Carvalho de Melo <acme@redhat.com>
| 2021-05-12 12:43:11 -0300 |
| commit | 0fc9d338944254561289e8639ac05ebf72b4b082 (patch) | |
| tree | a37d389d349b3950e94f739ec25f28e6f1760b99 /tools/perf/util/intel-pt-decoder | |
| parent | perf intel-pt: Let overlap detection handle VM timestamps (diff) | |
| download | linux-0fc9d338944254561289e8639ac05ebf72b4b082.tar.gz linux-0fc9d338944254561289e8639ac05ebf72b4b082.tar.bz2 linux-0fc9d338944254561289e8639ac05ebf72b4b082.zip | |
perf intel-pt: Add a tree for VMCS information
Even when VMX TSC Offset is not changing (during perf record), different
virtual machines can have different TSC Offsets. There is a Virtual Machine
Control Structure (VMCS) for each virtual CPU, the address of which is
reported to Intel PT in the VMCS packet. We do not know which VMCS belongs
to which virtual machine, so use a tree to keep track of VMCS information.
Then the decoder will be able to use the current VMCS value to look up the
current TSC Offset.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210430070309.17624-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt-decoder')
| -rw-r--r-- | tools/perf/util/intel-pt-decoder/intel-pt-decoder.c | 2 | ||||
| -rw-r--r-- | tools/perf/util/intel-pt-decoder/intel-pt-decoder.h | 11 |
2 files changed, 13 insertions, 0 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 8f916f90205e..c12e4a39b790 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c @@ -107,6 +107,7 @@ struct intel_pt_decoder { 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); + struct intel_pt_vmcs_info *(*findnew_vmcs_info)(void *data, uint64_t vmcs); void *data; struct intel_pt_state state; const unsigned char *buf; @@ -258,6 +259,7 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params) decoder->walk_insn = params->walk_insn; decoder->pgd_ip = params->pgd_ip; decoder->lookahead = params->lookahead; + decoder->findnew_vmcs_info = params->findnew_vmcs_info; 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 bebdb7d37b39..e6e782da45a4 100644 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h @@ -11,6 +11,8 @@ #include <stddef.h> #include <stdbool.h> +#include <linux/rbtree.h> + #include "intel-pt-insn-decoder.h" #define INTEL_PT_IN_TX (1 << 0) @@ -199,6 +201,14 @@ struct intel_pt_blk_items { bool is_32_bit; }; +struct intel_pt_vmcs_info { + struct rb_node rb_node; + uint64_t vmcs; + uint64_t tsc_offset; + bool reliable; + bool error_printed; +}; + struct intel_pt_state { enum intel_pt_sample_type type; bool from_nr; @@ -244,6 +254,7 @@ struct intel_pt_params { 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); + struct intel_pt_vmcs_info *(*findnew_vmcs_info)(void *data, uint64_t vmcs); void *data; bool return_compression; bool branch_enable; |