5 files changed, 35 insertions, 2 deletions

diff --git a/tools/perf/util/bpf_lock_contention.c b/tools/perf/util/bpf_lock_contention.c
index 42753a0dfdc5..e105245eb905 100644
--- a/tools/perf/util/bpf_lock_contention.c
+++ b/tools/perf/util/bpf_lock_contention.c
@@ -21,7 +21,7 @@ static struct lock_contention_bpf *skel;
 int lock_contention_prepare(struct lock_contention *con)
 {
 	int i, fd;
-	int ncpus = 1, ntasks = 1, ntypes = 1, naddrs = 1;
+	int ncpus = 1, ntasks = 1, ntypes = 1, naddrs = 1, ncgrps = 1;
 	struct evlist *evlist = con->evlist;
 	struct target *target = con->target;
 
@@ -51,6 +51,8 @@ int lock_contention_prepare(struct lock_contention *con)
 		ntasks = perf_thread_map__nr(evlist->core.threads);
 	if (con->filters->nr_types)
 		ntypes = con->filters->nr_types;
+	if (con->filters->nr_cgrps)
+		ncgrps = con->filters->nr_cgrps;
 
 	/* resolve lock name filters to addr */
 	if (con->filters->nr_syms) {
@@ -85,6 +87,7 @@ int lock_contention_prepare(struct lock_contention *con)
 	bpf_map__set_max_entries(skel->maps.task_filter, ntasks);
 	bpf_map__set_max_entries(skel->maps.type_filter, ntypes);
 	bpf_map__set_max_entries(skel->maps.addr_filter, naddrs);
+	bpf_map__set_max_entries(skel->maps.cgroup_filter, ncgrps);
 
 	if (lock_contention_bpf__load(skel) < 0) {
 		pr_err("Failed to load lock-contention BPF skeleton\n");
@@ -146,6 +149,16 @@ int lock_contention_prepare(struct lock_contention *con)
 			bpf_map_update_elem(fd, &con->filters->addrs[i], &val, BPF_ANY);
 	}
 
+	if (con->filters->nr_cgrps) {
+		u8 val = 1;
+
+		skel->bss->has_cgroup = 1;
+		fd = bpf_map__fd(skel->maps.cgroup_filter);
+
+		for (i = 0; i < con->filters->nr_cgrps; i++)
+			bpf_map_update_elem(fd, &con->filters->cgrps[i], &val, BPF_ANY);
+	}
+
 	/* these don't work well if in the rodata section */
 	skel->bss->stack_skip = con->stack_skip;
 	skel->bss->aggr_mode = con->aggr_mode;
diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c
index 823354999022..4900a5dfb4a4 100644
--- a/tools/perf/util/bpf_skel/lock_contention.bpf.c
+++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c
@@ -92,6 +92,13 @@ struct {
 	__uint(max_entries, 1);
 } addr_filter SEC(".maps");
 
+struct {
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(key_size, sizeof(__u64));
+	__uint(value_size, sizeof(__u8));
+	__uint(max_entries, 1);
+} cgroup_filter SEC(".maps");
+
 struct rw_semaphore___old {
 	struct task_struct *owner;
 } __attribute__((preserve_access_index));
@@ -114,6 +121,7 @@ int has_cpu;
 int has_task;
 int has_type;
 int has_addr;
+int has_cgroup;
 int needs_callstack;
 int stack_skip;
 int lock_owner;
@@ -194,6 +202,15 @@ static inline int can_record(u64 *ctx)
 			return 0;
 	}
 
+	if (has_cgroup) {
+		__u8 *ok;
+		__u64 cgrp = get_current_cgroup_id();
+
+		ok = bpf_map_lookup_elem(&cgroup_filter, &cgrp);
+		if (!ok)
+			return 0;
+	}
+
 	return 1;
 }
 
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index d03651098dde..fcb509058499 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -114,7 +114,7 @@ static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str
 	return NULL;
 }
 
-static struct cgroup *cgroup__new(const char *name, bool do_open)
+struct cgroup *cgroup__new(const char *name, bool do_open)
 {
 	struct cgroup *cgroup = zalloc(sizeof(*cgroup));
 
diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h
index beb6fe1012ed..de8882d6e8d3 100644
--- a/tools/perf/util/cgroup.h
+++ b/tools/perf/util/cgroup.h
@@ -26,6 +26,7 @@ void cgroup__put(struct cgroup *cgroup);
 struct evlist;
 struct rblist;
 
+struct cgroup *cgroup__new(const char *name, bool do_open);
 struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
 int evlist__expand_cgroup(struct evlist *evlist, const char *cgroups,
 			  struct rblist *metric_events, bool open_cgroup);
diff --git a/tools/perf/util/lock-contention.h b/tools/perf/util/lock-contention.h
index a073cc6a82d2..1a7248ff3889 100644
--- a/tools/perf/util/lock-contention.h
+++ b/tools/perf/util/lock-contention.h
@@ -9,9 +9,11 @@ struct lock_filter {
 	int			nr_types;
 	int			nr_addrs;
 	int			nr_syms;
+	int			nr_cgrps;
 	unsigned int		*types;
 	unsigned long		*addrs;
 	char			**syms;
+	u64			*cgrps;
 };
 
 struct lock_stat {