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-rw-r--r--kernel/events/hw_breakpoint.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index b7971d6f38b..bb38c4d3ee1 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -581,6 +581,12 @@ static int hw_breakpoint_event_init(struct perf_event *bp)
if (bp->attr.type != PERF_TYPE_BREAKPOINT)
return -ENOENT;
+ /*
+ * no branch sampling for breakpoint events
+ */
+ if (has_branch_stack(bp))
+ return -EOPNOTSUPP;
+
err = register_perf_hw_breakpoint(bp);
if (err)
return err;
@@ -613,6 +619,11 @@ static void hw_breakpoint_stop(struct perf_event *bp, int flags)
bp->hw.state = PERF_HES_STOPPED;
}
+static int hw_breakpoint_event_idx(struct perf_event *bp)
+{
+ return 0;
+}
+
static struct pmu perf_breakpoint = {
.task_ctx_nr = perf_sw_context, /* could eventually get its own */
@@ -622,6 +633,8 @@ static struct pmu perf_breakpoint = {
.start = hw_breakpoint_start,
.stop = hw_breakpoint_stop,
.read = hw_breakpoint_pmu_read,
+
+ .event_idx = hw_breakpoint_event_idx,
};
int __init init_hw_breakpoint(void)
@@ -651,10 +664,10 @@ int __init init_hw_breakpoint(void)
err_alloc:
for_each_possible_cpu(err_cpu) {
- if (err_cpu == cpu)
- break;
for (i = 0; i < TYPE_MAX; i++)
kfree(per_cpu(nr_task_bp_pinned[i], cpu));
+ if (err_cpu == cpu)
+ break;
}
return -ENOMEM;