Similar to commit 98770bd4e6df ("bpf,x86: add fsession support for x86_64"),
add fsession support on arm64.
Patch #1 adds bpf_jit_supports_fsession() to prevent fsession loading
on architectures that do not implement fsession support.
Patch #2 implements fsession support in the arm64 BPF JIT trampoline.
Patch #3 enables the relevant selftests on arm64, including get_func_ip,
and get_func_args.
All enabled tests pass on arm64:
cd tools/testing/selftests/bpf
./test_progs -t fsession
#136/1 fsession_test/fsession_test:OK
#136/2 fsession_test/fsession_reattach:OK
#136/3 fsession_test/fsession_cookie:OK
#136 fsession_test:OK
Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED
./test_progs -t get_func
#138 get_func_args_test:OK
#139 get_func_ip_test:OK
Summary: 2/0 PASSED, 0 SKIPPED, 0 FAILED
Changes:
v4 -> v5:
* Address comment from Alexei:
* Rename helper bpf_link_prog_session_cookie() to
bpf_prog_calls_session_cookie().
* v4: https://lore.kernel.org/bpf/[email protected]/
v3 -> v4:
* Add a log when !bpf_jit_supports_fsession() in patch #1 (per AI).
* v3: https://lore.kernel.org/bpf/[email protected]/
v2 -> v3:
* Fix typo in subject and patch message of patch #1 (per AI and Chris).
* Collect Acked-by, and Tested-by from Puranjay, thanks.
* v2: https://lore.kernel.org/bpf/[email protected]/
v1 -> v2:
* Add bpf_jit_supports_fsession().
* v1: https://lore.kernel.org/bpf/[email protected]/
Leon Hwang (3):
bpf: Add bpf_jit_supports_fsession()
bpf, arm64: Add fsession support
selftests/bpf: Enable get_func_args and get_func_ip tests on arm64
arch/arm64/net/bpf_jit_comp.c | 71 ++++++++++++++++---
arch/x86/net/bpf_jit_comp.c | 5 ++
include/linux/bpf.h | 7 +-
include/linux/filter.h | 1 +
kernel/bpf/core.c | 5 ++
kernel/bpf/verifier.c | 5 ++
.../selftests/bpf/prog_tests/fsession_test.c | 32 ++++++---
.../selftests/bpf/progs/get_func_args_test.c | 2 +-
.../selftests/bpf/progs/get_func_ip_test.c | 2 +-
9 files changed, 110 insertions(+), 20 deletions(-)
--
2.52.0
