linux.git/tools/testing/selftests/bpf/Makefile, branch master

Merge tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2026-08-22T15:47:50+00:00

Pull perf tools updates from Namhyung Kim:
 "perf c2c:

   - Add 'function view' in perf c2c report TUI (switched by pressing
     'TAB' in the cacheline view) to organize samples around functions
     rather than cachelines in 3-level hierarchy:

	Level 1: Read-side function (sorted by estimated Cycles %)
	Level 2:   Contending writer functions (sorted by Store count)
	Level 3:     Shared cacheline addresses

     Users can navigate the entries and fold/unfold using 'e' key. An
     example output would look like below:

	Shared Data Functions Table     (19 entries, sorted on Cycles %)
	   Cycles    Store
	        %    count  Function / Contending function / Cacheline
	----------------------------------------------------------------------
	+  35.67%      876  + [k] cpupri_set
	+  24.31%      424  + [k] pull_rt_task
	-  16.53%      555  - [k] dequeue_pushable_task
	               145    - [k] pull_rt_task
	               145        0xff2d0082809da080
	               139    - [k] enqueue_pushable_task
	                70        0xff2d00a2071f9640
	                69        0xff2d0082809da000

  python module support:

   - Extend "perf" python module so that it can be fully functional. The
     goal is to run scripts directly, not by 'perf script' command. This
     would give better performance as well as more control to build
     standalone programs with UI.

   - Add LiveSession helper (perf_live.py) to enable live event
     collection directly from Python using perf.evlist and
     perf.parse_events.

  perf stat:

   - Add --hide-zero-events option to suppress zero-count events
   - Reject conflicting --field-separator and --json-output options
   - Fix duplicate event output with --for-each-cgroup

  perf sched latency:

   - Add -H/--histogram and --hist-mode (log|linear) options to show
     scheduler wait latency histograms
   - Add --time option to filter analysis by time span in 'perf sched
     latency'

  ARM CoreSight:

   - Synthesize callchains for instruction samples from CoreSight trace
     using thread stack ('--itrace=g...')
   - Support call indentation ('perf script -F +callindent') to display
     call depth hierarchy on branch samples
   - Decode ETE (Embedded Trace Extension) exception packets

  Build system:

   - Add 'make install-build-deps' target to install required packages
   - Parallelize JSON and metric pre-computation in jevents.py for
     faster builds

  Vendor event/metric updates:

   - Add Intel Nova Lake events and update tables for existing models
   - Update AMD Zen 5 and Zen 6 core events
   - Update Arm64 Tegra410 metrics and PowerPC hcalls

  Internal changes and fixes:

   - Harden trace-event and synthetic event parsing against corrupted
     data
   - Fix unwinding of multi-threaded processes in libdw unwinder
   - Fix memory leaks in various commands and python bindings
   - Speed up 'perf test' shell tests"

* tag 'perf-tools-for-v7.3-2026-08-21' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (232 commits)
  perf vendor events arm64: Fix Tegra410 Olympus event 0x0197
  perf vendor events arm64: fix swapped MetricGroup for Tegra410 L1 prefetcher metrics
  perf evlist: Warn when 'sleep' workload is used without system-wide (-a) option
  perf c2c: document function view in perf-c2c man page
  perf c2c: add function view browser UI and cacheline detail
  perf c2c: build and finalize the function view hierarchy
  perf c2c: add function view hierarchy entry creation
  perf c2c: add function view stats merge and memory management
  perf c2c: add HPP list parsing for function view columns
  perf c2c: add column rendering for function view
  perf c2c: add function view model skeleton
  perf c2c: extract shared data structures into util/c2c.h
  perf test sample-parsing: Validate PERF_FORMAT_GROUP values without LOST
  perf dso: Replace assert with runtime check in dso__read_symbol()
  perf dso: Guard against cache underflow on short reads in dso_cache__memcpy()
  perf dso: Use stored fd error instead of stale errno in file_read() and file_size()
  perf dso: Guard close() against invalid fd in dso__decompress_kmodule_path()
  perf dso: Guard against errno==0 when dso__get_filename() returns NULL
  perf build: install-build-deps: add RHEL family devel package mapping
  perf build: Remove leftover feature tests for removed cxx and clang support
  ...

selftests/bpf: Fix selftest build after filter.h update

2026-08-14T22:14:36+00:00

Upstream commit 7a1f400ff5e5 ("tools: Ensure tools copy of
linux/filter.h exports the UAPI") caused selftests/bpf build to
fail [1] with:

  In file included from progs/arena_atomics.c:9:
  /codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf/../../../include/linux/filter.h:9:10: fatal error: 'uapi/linux/filter.h' file not found
      9 | #include 
        |          ^~~~~~~~~~~~~~~~~~~~~
  1 error generated.
    CLNG-BPF [test_progs] bind_perm.bpf.o
  make: *** [Makefile:888: /codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf/arena_atomics.bpf.o] Error 1
  make: *** Waiting for unfinished jobs....
    GEN-OBJ  [libarena] libarena.bpf.o
    GEN-SKEL [libarena] libarena.skel.h
  make: Leaving directory '/codebuild/output/src2365462129/src/actions-runner/_work/bpf/bpf/tools/testing/selftests/bpf'
  Process completed with exit code 2.

BPF selftest programs include the tools header directly, but
BPF_CFLAGS only exposes tools/include/uapi. Compiler therefore cannot
resolve the nested UAPI include.

Add tools/include after tools/include/uapi in BPF_CFLAGS. This
preserves the existing UAPI header precedence while allowing tools
headers to include uapi headers.

[1] https://github.com/kernel-patches/bpf/actions/runs/31806678733/job/94787271162

Fixes: 7a1f400ff5e5 ("tools: Ensure tools copy of linux/filter.h exports the UAPI")
Signed-off-by: Ihor Solodrai 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20260814173522.2783625-1-ihor.solodrai@linux.dev

selftests/bpf: Add tests to verify global percpu data

2026-08-13T17:27:40+00:00

If the arch, like s390x, does not support percpu insn, these cases won't
test global percpu data by checking FEAT_PERCPU_DATA support.

The following APIs have been tested for global percpu data:

1. bpf_map__set_initial_value()
2. bpf_map__initial_value()
3. bpf_map__set_value_size()
4. generated percpu struct pointer pointing to internal map's mmaped data
5. bpf_map__lookup_elem() for global percpu data map
6. bpf_map_lookup_elem_flags() for global percpu data map

At the same time, the case is also tested with 'bpftool gen skeleton -L'.

Assisted-by: Codex:gpt-5.5-xhigh
Signed-off-by: Leon Hwang 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20260813152324.97937-8-leon.hwang@linux.dev

selftests/bpf: Add bpf_for() benchmark

2026-08-05T17:44:35+00:00

Add a bpf_for() benchmark modelled on bench_bpf_loop so the per-iteration
iterator cost can be measured and compared against bpf_loop. It runs an
empty bpf_for(i, 0, nr_loops) loop 1000 times per trigger and accounts
nr_loops hits per outer iteration:

  $ ./bench -p 1 --nr_loops 1000 bpf-for

Signed-off-by: Puranjay Mohan 
Signed-off-by: Andrii Nakryiko 
Link: https://lore.kernel.org/bpf/20260804134601.2305303-7-puranjay@kernel.org

selftests/xsk: Decouple xskxceiver and xdp apps from test_progs objects

2026-08-04T22:50:58+00:00

Build xskxceiver, xdp_hw_metadata, and xdp_features from explicit source
lists instead of reusing helper objects produced by test_progs rules.

Reusing shared objects such as network_helpers.o and xsk.o can pull in
test_progs-only dependency chains and trigger unrelated libarena builds
when invoking a single target.

Keep these standalone binaries self-contained so each target builds only
its own required sources and BPF skeleton dependencies.

Signed-off-by: Tushar Vyavahare 
Signed-off-by: Andrii Nakryiko 
Tested-by: Maciej Fijalkowski 
Reviewed-by: Maciej Fijalkowski 
Link: https://lore.kernel.org/bpf/20260728115036.2049536-1-tushar.vyavahare@intel.com

tools/build: selftests: Remove some duplicate toolchain definitions

2026-07-26T05:25:00+00:00

Try to remove some, but not all duplicate toolchain definitions. In
these instances, their makefiles already include
tools/scripts/Makefile.include which defines these in a consistent way.

STRIP is the only one that was set with an '=', but I don't think it
was significant so that difference can be dropped.

Signed-off-by: James Clark 
Reviewed-by: Ian Rogers 
Acked-by: Ihor Solodrai 
Acked-by: Kumar Kartikeya Dwivedi 
Signed-off-by: Namhyung Kim

selftests/bpf: Fix make install target

2026-07-21T17:27:12+00:00

After "make install", test_progs fails because two files end up in the
wrong place:

- bpftool: TEST_GEN_PROGS_EXTENDED flattens it into $(INSTALL_PATH), losing
  the tools/sbin/ prefix that detect_bpftool_path() expects. Remove it from
  TEST_GEN_PROGS_EXTENDED and install it explicitly under tools/sbin/
  instead.

- *.BTF: resolve_btfids writes resolve_btfids.test.o.BTF as a side-effect
  of the build but INSTALL_RULE never copies it over. Install all *.BTF
  files alongside the rest of the per-flavor output.

Fixes: f21fae577446 ("selftests/bpf: Add a few helpers for bpftool testing")
Fixes: 522397d05e7d ("resolve_btfids: Change in-place update with raw binary output")
Signed-off-by: Ricardo B. Marlière 
Acked-by: Ihor Solodrai 
Link: https://lore.kernel.org/bpf/20260720-selftests-bpf_fixes-v2-1-b450eda93dfe@suse.com
Signed-off-by: Kumar Kartikeya Dwivedi

selftests/bpf: Avoid static LLVM linking for cross builds

2026-06-15T00:32:53+00:00

The BPF selftests prefer static LLVM linking, which works for native
builds but can break cross builds. Its --link-static output may include
host-only libraries that are unavailable for the cross compilation,
causing link failures.

Avoid static LLVM linking for cross builds and use shared LLVM libraries
instead. Native builds keep the existing behavior.

Signed-off-by: Leo Yan 
Link: https://lore.kernel.org/r/20260602-tools_build_fix_zero_init_bpf_only-v2-8-c76e5250ea1c@arm.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Use common CFLAGS for urandom_read

2026-06-15T00:32:53+00:00

The urandom_read helper and its shared library are built with $(CLANG)
directly rather than through the normal selftest $(CC) rules.

The CFLAGS variable can contain specific flags only for $(CC) but might
be imcompatible for $(CLANG) and those flags are not necessarily valid
for the clang-only urandom_read build.

Split the BPF selftest local flags into COMMON_CFLAGS and append them to
CFLAGS for the normal build path. Use COMMON_CFLAGS directly for
urandom_read and liburandom_read.so, while still filtering out -static as
before.

Signed-off-by: Leo Yan 
Link: https://lore.kernel.org/r/20260602-tools_build_fix_zero_init_bpf_only-v2-7-c76e5250ea1c@arm.com
Signed-off-by: Alexei Starovoitov

selftests/bpf: Add tracing multi session test

2026-06-07T17:03:03+00:00

Adding tests for tracing multi link session.

Signed-off-by: Jiri Olsa 
Link: https://lore.kernel.org/r/20260606123955.345967-26-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov