perf: Add kernel side syscall events support for breakpoints
Add the remaining necessary bits to support breakpoints created through perf syscall. We don't use the software counter interface as: - We don't need to check against recursion, this is already done in hardware breakpoints arch level. - We already know the perf event we are dealing with when the event is to be committed. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1258987355-8751-3-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>hifive-unleashed-5.1
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fdf6bc9522
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f5ffe02e50
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@ -3831,6 +3831,20 @@ static int perf_swevent_is_counting(struct perf_event *event)
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static int perf_tp_event_match(struct perf_event *event,
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static int perf_tp_event_match(struct perf_event *event,
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struct perf_sample_data *data);
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struct perf_sample_data *data);
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static int perf_exclude_event(struct perf_event *event,
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struct pt_regs *regs)
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{
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if (regs) {
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if (event->attr.exclude_user && user_mode(regs))
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return 1;
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if (event->attr.exclude_kernel && !user_mode(regs))
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return 1;
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}
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return 0;
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}
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static int perf_swevent_match(struct perf_event *event,
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static int perf_swevent_match(struct perf_event *event,
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enum perf_type_id type,
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enum perf_type_id type,
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u32 event_id,
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u32 event_id,
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@ -3842,16 +3856,12 @@ static int perf_swevent_match(struct perf_event *event,
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if (event->attr.type != type)
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if (event->attr.type != type)
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return 0;
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return 0;
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if (event->attr.config != event_id)
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if (event->attr.config != event_id)
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return 0;
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return 0;
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if (regs) {
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if (perf_exclude_event(event, regs))
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if (event->attr.exclude_user && user_mode(regs))
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return 0;
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return 0;
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if (event->attr.exclude_kernel && !user_mode(regs))
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return 0;
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}
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if (event->attr.type == PERF_TYPE_TRACEPOINT &&
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if (event->attr.type == PERF_TYPE_TRACEPOINT &&
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!perf_tp_event_match(event, data))
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!perf_tp_event_match(event, data))
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@ -4282,9 +4292,15 @@ static const struct pmu *bp_perf_event_init(struct perf_event *bp)
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return &perf_ops_bp;
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return &perf_ops_bp;
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}
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}
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void perf_bp_event(struct perf_event *bp, void *regs)
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void perf_bp_event(struct perf_event *bp, void *data)
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{
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{
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/* TODO */
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struct perf_sample_data sample;
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struct pt_regs *regs = data;
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sample.addr = bp->attr.bp_addr;
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if (!perf_exclude_event(bp, regs))
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perf_swevent_add(bp, 1, 1, &sample, regs);
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}
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}
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#else
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#else
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static void bp_perf_event_destroy(struct perf_event *event)
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static void bp_perf_event_destroy(struct perf_event *event)
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