From: Hou Tao <houtao1@huawei.com>
To: Alexei Starovoitov <ast@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>, Yonghong Song <yhs@fb.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Song Liu <songliubraving@fb.com>,
"David S . Miller" <davem@davemloft.net>,
John Fastabend <john.fastabend@gmail.com>,
<netdev@vger.kernel.org>, <bpf@vger.kernel.org>,
<houtao1@huawei.com>, Zi Shen Lim <zlim.lnx@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Julien Thierry <jthierry@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Ard Biesheuvel <ardb@kernel.org>,
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH bpf-next v2 0/2] arm64, bpf: support more atomic ops
Date: Thu, 27 Jan 2022 15:53:20 +0800 [thread overview]
Message-ID: <20220127075322.675323-1-houtao1@huawei.com> (raw)
Hi,
Atomics support in bpf has already been done by "Atomics for eBPF"
patch series [1], but it only adds support for x86, and this patchset
adds support for arm64.
Patch #1 changes the type of test program from fentry/ to raw_tp/ for
atomics test, because bpf trampoline is not available for arm64 now.
After the change, atomics test will be available for arm64 and other
archs.
Patch #2 implements atomic[64]_fetch_add, atomic[64]_[fetch_]{and,or,xor}
and atomic[64]_{xchg|cmpxchg} for arm64. For no-LSE-ATOMICS case and
cpus_have_cap(ARM64_HAS_LSE_ATOMICS) case, both ./test_verifier and
"./test_progs -t atomic" are exercised and passed correspondingly.
Comments are always welcome.
Regards,
Tao
[1]: https://lore.kernel.org/bpf/20210114181751.768687-2-jackmanb@google.com/
Change Log:
v2:
* patch #1: use two seperated ASSERT_OK() instead of ASSERT_TRUE()
* add Acked-by tag for both patches
v1: https://lore.kernel.org/bpf/20220121135632.136976-1-houtao1@huawei.com/
Hou Tao (2):
selftests/bpf: use raw_tp program for atomic test
arm64, bpf: support more atomic operations
arch/arm64/include/asm/insn.h | 45 +++-
arch/arm64/lib/insn.c | 155 +++++++++++--
arch/arm64/net/bpf_jit.h | 43 +++-
arch/arm64/net/bpf_jit_comp.c | 216 ++++++++++++++----
.../selftests/bpf/prog_tests/atomics.c | 121 +++-------
tools/testing/selftests/bpf/progs/atomics.c | 28 +--
6 files changed, 444 insertions(+), 164 deletions(-)
--
2.27.0
next reply other threads:[~2022-01-28 9:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 7:53 Hou Tao [this message]
2022-01-27 7:53 ` [PATCH bpf-next v2 1/2] selftests/bpf: use raw_tp program for atomic test Hou Tao
2022-01-27 7:53 ` [PATCH bpf-next v2 2/2] arm64, bpf: support more atomic operations Hou Tao
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