netdev - [PATCH bpf-next 0/2] Fix accessing first syscall argument on RV64

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Message-Id: <20240829133253.882133-1-pulehui@huaweicloud.com>
Date: Thu, 29 Aug 2024 13:32:50 +0000
From: Pu Lehui <pulehui@...weicloud.com>
To: bpf@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	netdev@...r.kernel.org
Cc: Björn Töpel <bjorn@...nel.org>,
	Ilya Leoshkevich <iii@...ux.ibm.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	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 0/2] 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]

Pu Lehui (2):
  libbpf: Fix accessing first syscall argument on RV64
  selftests/bpf: Skip case involving first arg in bpf_syscall_macro on
    RV64

 tools/lib/bpf/bpf_tracing.h                              | 9 ++++++++-
 .../selftests/bpf/prog_tests/test_bpf_syscall_macro.c    | 2 +-
 tools/testing/selftests/bpf/progs/bpf_syscall_macro.c    | 2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

-- 
2.34.1