diff options
| -rw-r--r-- | tools/perf/util/intel-pt.c | 81 |
1 files changed, 69 insertions, 12 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index ddb8e6c3ffb0..29d871718995 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -163,6 +163,9 @@ struct intel_pt_queue { int switch_state; pid_t next_tid; struct thread *thread; + struct machine *guest_machine; + struct thread *unknown_guest_thread; + pid_t guest_machine_pid; bool exclude_kernel; bool have_sample; u64 time; @@ -550,13 +553,59 @@ static void intel_pt_cache_invalidate(struct dso *dso, struct machine *machine, auxtrace_cache__remove(dso->auxtrace_cache, offset); } -static inline u8 intel_pt_cpumode(struct intel_pt *pt, uint64_t ip) +static inline bool intel_pt_guest_kernel_ip(uint64_t ip) { - return ip >= pt->kernel_start ? + /* Assumes 64-bit kernel */ + return ip & (1ULL << 63); +} + +static inline u8 intel_pt_nr_cpumode(struct intel_pt_queue *ptq, uint64_t ip, bool nr) +{ + if (nr) { + return intel_pt_guest_kernel_ip(ip) ? + PERF_RECORD_MISC_GUEST_KERNEL : + PERF_RECORD_MISC_GUEST_USER; + } + + return ip >= ptq->pt->kernel_start ? PERF_RECORD_MISC_KERNEL : PERF_RECORD_MISC_USER; } +static inline u8 intel_pt_cpumode(struct intel_pt_queue *ptq, uint64_t from_ip, uint64_t to_ip) +{ + /* No support for non-zero CS base */ + if (from_ip) + return intel_pt_nr_cpumode(ptq, from_ip, ptq->state->from_nr); + return intel_pt_nr_cpumode(ptq, to_ip, ptq->state->to_nr); +} + +static int intel_pt_get_guest(struct intel_pt_queue *ptq) +{ + struct machines *machines = &ptq->pt->session->machines; + struct machine *machine; + pid_t pid = ptq->pid <= 0 ? DEFAULT_GUEST_KERNEL_ID : ptq->pid; + + if (ptq->guest_machine && pid == ptq->guest_machine_pid) + return 0; + + ptq->guest_machine = NULL; + thread__zput(ptq->unknown_guest_thread); + + machine = machines__find_guest(machines, pid); + if (!machine) + return -1; + + ptq->unknown_guest_thread = machine__idle_thread(machine); + if (!ptq->unknown_guest_thread) + return -1; + + ptq->guest_machine = machine; + ptq->guest_machine_pid = pid; + + return 0; +} + static int intel_pt_walk_next_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, @@ -573,19 +622,29 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, u64 offset, start_offset, start_ip; u64 insn_cnt = 0; bool one_map = true; + bool nr; intel_pt_insn->length = 0; if (to_ip && *ip == to_ip) goto out_no_cache; - cpumode = intel_pt_cpumode(ptq->pt, *ip); + nr = ptq->state->to_nr; + cpumode = intel_pt_nr_cpumode(ptq, *ip, nr); - thread = ptq->thread; - if (!thread) { - if (cpumode != PERF_RECORD_MISC_KERNEL) + if (nr) { + if (cpumode != PERF_RECORD_MISC_GUEST_KERNEL || + intel_pt_get_guest(ptq)) return -EINVAL; - thread = ptq->pt->unknown_thread; + machine = ptq->guest_machine; + thread = ptq->unknown_guest_thread; + } else { + thread = ptq->thread; + if (!thread) { + if (cpumode != PERF_RECORD_MISC_KERNEL) + return -EINVAL; + thread = ptq->pt->unknown_thread; + } } while (1) { @@ -1101,6 +1160,7 @@ static void intel_pt_free_queue(void *priv) if (!ptq) return; thread__zput(ptq->thread); + thread__zput(ptq->unknown_guest_thread); intel_pt_decoder_free(ptq->decoder); zfree(&ptq->event_buf); zfree(&ptq->last_branch); @@ -1315,8 +1375,8 @@ static void intel_pt_prep_b_sample(struct intel_pt *pt, sample->time = tsc_to_perf_time(ptq->timestamp, &pt->tc); sample->ip = ptq->state->from_ip; - sample->cpumode = intel_pt_cpumode(pt, sample->ip); sample->addr = ptq->state->to_ip; + sample->cpumode = intel_pt_cpumode(ptq, sample->ip, sample->addr); sample->period = 1; sample->flags = ptq->flags; @@ -1833,10 +1893,7 @@ static int intel_pt_synth_pebs_sample(struct intel_pt_queue *ptq) else sample.ip = ptq->state->from_ip; - /* No support for guest mode at this time */ - cpumode = sample.ip < ptq->pt->kernel_start ? - PERF_RECORD_MISC_USER : - PERF_RECORD_MISC_KERNEL; + cpumode = intel_pt_cpumode(ptq, sample.ip, 0); event->sample.header.misc = cpumode | PERF_RECORD_MISC_EXACT_IP; |