From: Pu Lehui <pulehui@huaweicloud.com>
To: bpf@vger.kernel.org, linux-riscv@lists.infradead.org,
netdev@vger.kernel.org
Cc: "Björn Töpel" <bjorn@kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Martin KaFai Lau" <martin.lau@linux.dev>,
"Eduard Zingerman" <eddyz87@gmail.com>,
"Song Liu" <song@kernel.org>, "Yonghong Song" <yhs@fb.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"KP Singh" <kpsingh@kernel.org>,
"Stanislav Fomichev" <sdf@google.com>,
"Hao Luo" <haoluo@google.com>, "Jiri Olsa" <jolsa@kernel.org>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Pu Lehui" <pulehui@huawei.com>,
"Pu Lehui" <pulehui@huaweicloud.com>
Subject: [PATCH bpf-next 0/2] Add 12-argument support for RV64 bpf trampoline
Date: Sun, 31 Mar 2024 09:24:03 +0000 [thread overview]
Message-ID: <20240331092405.822571-1-pulehui@huaweicloud.com> (raw)
This patch adds 12 function arguments support for riscv64 bpf
trampoline. The current bpf trampoline supports <= sizeof(u64) bytes
scalar arguments [0] and <= 16 bytes struct arguments [1]. Therefore, we
focus on the situation where scalars are at most XLEN bits and
aggregates whose total size does not exceed 2×XLEN bits in the riscv
calling convention [2].
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6184 [0]
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6769 [1]
Link: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/releases/download/draft-20230929-e5c800e661a53efe3c2678d71a306323b60eb13b/riscv-abi.pdf [2]
Pu Lehui (2):
riscv, bpf: Add 12-argument support for RV64 bpf trampoline
selftests/bpf: Add testcase where 7th argment is struct
arch/riscv/net/bpf_jit_comp64.c | 63 +++++++++++++------
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++
.../selftests/bpf/prog_tests/tracing_struct.c | 13 ++++
.../selftests/bpf/progs/tracing_struct.c | 35 +++++++++++
4 files changed, 111 insertions(+), 19 deletions(-)
--
2.34.1
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next reply other threads:[~2024-03-31 9:23 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-31 9:24 Pu Lehui [this message]
2024-03-31 9:24 ` [PATCH bpf-next 1/2] riscv, bpf: Add 12-argument support for RV64 bpf trampoline Pu Lehui
2024-03-31 9:24 ` Pu Lehui
2024-03-31 9:24 ` Pu Lehui
2024-03-31 9:24 ` [PATCH bpf-next 2/2] selftests/bpf: Add testcase where 7th argment is struct Pu Lehui
2024-03-31 9:24 ` Pu Lehui
2024-04-02 14:02 ` Daniel Borkmann
2024-04-03 3:24 ` Pu Lehui
2024-04-02 13:41 ` [PATCH bpf-next 0/2] Add 12-argument support for RV64 bpf trampoline Björn Töpel
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