netdev - [PATCH bpf-next v3 0/4] Fix accessing first syscall argument on RV64

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Message-Id: <20240831041934.1629216-1-pulehui@huaweicloud.com>
Date: Sat, 31 Aug 2024 04:19:30 +0000
From: Pu Lehui <pulehui@...weicloud.com>
To: bpf@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	netdev@...r.kernel.org,
	Andrii Nakryiko <andrii@...nel.org>
Cc: Björn Töpel <bjorn@...nel.org>,
	Ilya Leoshkevich <iii@...ux.ibm.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	John Fastabend <john.fastabend@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Stanislav Fomichev <sdf@...gle.com>,
	Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Puranjay Mohan <puranjay@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Pu Lehui <pulehui@...wei.com>
Subject: [PATCH bpf-next v3 0/4] Fix accessing first syscall argument on RV64

On RV64, as Ilya mentioned before [0], the first syscall parameter should be
accessed through orig_a0 (see arch/riscv64/include/asm/syscall.h),
otherwise it will cause selftests like bpf_syscall_macro, vmlinux,
test_lsm, etc. to fail on RV64.

Link: https://lore.kernel.org/bpf/20220209021745.2215452-1-iii@linux.ibm.com [0]

v3:
- Fix test case error.

v2: https://lore.kernel.org/all/20240831023646.1558629-1-pulehui@huaweicloud.com/
- Access first syscall argument with CO-RE direct read. (Andrii)

v1: https://lore.kernel.org/all/20240829133453.882259-1-pulehui@huaweicloud.com/

Pu Lehui (4):
  libbpf: Access first syscall argument with CO-RE direct read on s390
  libbpf: Access first syscall argument with CO-RE direct read on arm64
  selftests/bpf: Enable test_bpf_syscall_macro:syscall_arg1 on s390 and
    arm64
  libbpf: Fix accessing first syscall argument on RV64

 tools/lib/bpf/bpf_tracing.h                     | 17 ++++++++++++-----
 .../bpf/prog_tests/test_bpf_syscall_macro.c     |  4 ----
 .../selftests/bpf/progs/bpf_syscall_macro.c     |  2 --
 3 files changed, 12 insertions(+), 11 deletions(-)

-- 
2.34.1