Kajol Jain 69e402a985 bpf: Remove config check to enable bpf support for branch records ... [ Upstream commit db52f57211 ] Branch data available to BPF programs can be very useful to get stack traces out of userspace application. Commit fff7b64355 ("bpf: Add bpf_read_branch_records() helper") added BPF support to capture branch records in x86. Enable this feature also for other architectures as well by removing checks specific to x86. If an architecture doesn't support branch records, bpf_read_branch_records() still has appropriate checks and it will return an -EINVAL in that scenario. Based on UAPI helper doc in include/uapi/linux/bpf.h, unsupported architectures should return -ENOENT in such case. Hence, update the appropriate check to return -ENOENT instead. Selftest 'perf_branches' result on power9 machine which has the branch stacks support: - Before this patch: [command]# ./test_progs -t perf_branches #88/1 perf_branches/perf_branches_hw:FAIL #88/2 perf_branches/perf_branches_no_hw:OK #88 perf_branches:FAIL Summary: 0/1 PASSED, 0 SKIPPED, 1 FAILED - After this patch: [command]# ./test_progs -t perf_branches #88/1 perf_branches/perf_branches_hw:OK #88/2 perf_branches/perf_branches_no_hw:OK #88 perf_branches:OK Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED Selftest 'perf_branches' result on power9 machine which doesn't have branch stack report: - After this patch: [command]# ./test_progs -t perf_branches #88/1 perf_branches/perf_branches_hw:SKIP #88/2 perf_branches/perf_branches_no_hw:OK #88 perf_branches:OK Summary: 1/1 PASSED, 1 SKIPPED, 0 FAILED Fixes: fff7b64355 ("bpf: Add bpf_read_branch_records() helper") Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20211206073315.77432-1-kjain@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-01-27 10:53:54 +01:00
..
blktrace.c	blktrace: Fix uaf in blk_trace access after removing by sysfs	2021-09-30 10:11:05 +02:00
bpf_trace.c	bpf: Remove config check to enable bpf support for branch records	2022-01-27 10:53:54 +01:00
bpf_trace.h
fgraph.c
ftrace_internal.h
ftrace.c	tracing: Have all levels of checks prevent recursion	2021-10-27 09:56:56 +02:00
Kconfig
kprobe_event_gen_test.c
Makefile
power-traces.c
preemptirq_delay_test.c
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: Protect ring_buffer_reset() from reentrancy	2021-11-18 14:03:49 +01:00
rpm-traces.c
synth_event_gen_test.c
trace_benchmark.c
trace_benchmark.h
trace_boot.c	tracing/boot: Fix a hist trigger dependency for boot time tracing	2021-09-22 12:28:03 +02:00
trace_branch.c
trace_clock.c	tracing: Do no increment trace_clock_global() by one	2021-06-23 14:42:50 +02:00
trace_dynevent.c
trace_dynevent.h
trace_entries.h
trace_event_perf.c
trace_events_filter_test.h
trace_events_filter.c
trace_events_hist.c	tracing/histograms: String compares should not care about signed values	2021-12-08 09:03:22 +01:00
trace_events_inject.c
trace_events_synth.c
trace_events_trigger.c
trace_events.c	tracing: Check pid filtering when creating events	2021-12-01 09:19:09 +01:00
trace_export.c
trace_functions_graph.c
trace_functions.c	tracing: Have all levels of checks prevent recursion	2021-10-27 09:56:56 +02:00
trace_hwlat.c
trace_irqsoff.c
trace_kdb.c
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	tracing/probes: Reject events which have the same name of existing one	2021-09-22 12:28:00 +02:00
trace_mmiotrace.c
trace_nop.c
trace_output.c
trace_output.h
trace_preemptirq.c
trace_printk.c
trace_probe_tmpl.h
trace_probe.c	tracing/probes: Reject events which have the same name of existing one	2021-09-22 12:28:00 +02:00
trace_probe.h	tracing/probes: Reject events which have the same name of existing one	2021-09-22 12:28:00 +02:00
trace_sched_switch.c
trace_sched_wakeup.c
trace_selftest_dynamic.c
trace_selftest.c
trace_seq.c
trace_stack.c
trace_stat.c
trace_stat.h
trace_synth.h	tracing: Synthetic event field_pos is an index not a boolean	2021-07-28 14:35:45 +02:00
trace_syscalls.c
trace_uprobe.c	tracing/uprobe: Fix uprobe_perf_open probes iteration	2021-12-01 09:19:01 +01:00
trace.c	tracing: Tag trace_percpu_buffer as a percpu pointer	2022-01-11 15:24:58 +01:00
trace.h	tracing: Fix pid filtering when triggers are attached	2021-12-01 09:19:01 +01:00
tracing_map.c	tracing: Fix a kmemleak false positive in tracing_map	2021-12-17 10:14:40 +01:00
tracing_map.h