From: Puranjay Mohan <puranjay12@gmail.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Eduard Zingerman <eddyz87@gmail.com>, Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>,
bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Zi Shen Lim <zlim.lnx@gmail.com>,
Xu Kuohai <xukuohai@huawei.com>
Cc: puranjay12@gmail.com
Subject: [PATCH bpf-next 0/2] bpf,arm64: Add support for BPF Arena
Date: Thu, 14 Mar 2024 15:00:01 +0000 [thread overview]
Message-ID: <20240314150003.123020-1-puranjay12@gmail.com> (raw)
This series adds the support for PROBE_MEM32 and bpf_addr_space_cast
instructions to the ARM64 BPF JIT. These two instructions allow the
enablement of BPF Arena.
All arena related selftests are passing.
[root@ip-172-31-6-62 bpf]# ./test_progs -a "*arena*"
#3/1 arena_htab/arena_htab_llvm:OK
#3/2 arena_htab/arena_htab_asm:OK
#3 arena_htab:OK
#4/1 arena_list/arena_list_1:OK
#4/2 arena_list/arena_list_1000:OK
#4 arena_list:OK
#434/1 verifier_arena/basic_alloc1:OK
#434/2 verifier_arena/basic_alloc2:OK
#434/3 verifier_arena/basic_alloc3:OK
#434/4 verifier_arena/iter_maps1:OK
#434/5 verifier_arena/iter_maps2:OK
#434/6 verifier_arena/iter_maps3:OK
#434 verifier_arena:OK
Summary: 3/10 PASSED, 0 SKIPPED, 0 FAILED
The implementation of bpf_addr_space_cast can be optimised by using ROR
(immediate) and CSEL instructions. Currently, lib/insn.c doesn't have APIs
to generate these intructions. I will send subsequent patches to implement
the APIs and then use these instructions in the JIT.
Puranjay Mohan (2):
bpf: Add arm64 JIT support for PROBE_MEM32 pseudo instructions.
bpf: Add arm64 JIT support for bpf_addr_space_cast instruction.
arch/arm64/net/bpf_jit.h | 1 +
arch/arm64/net/bpf_jit_comp.c | 105 +++++++++++++++++--
tools/testing/selftests/bpf/DENYLIST.aarch64 | 2 -
3 files changed, 96 insertions(+), 12 deletions(-)
--
2.40.1
next reply other threads:[~2024-03-14 15:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-14 15:00 Puranjay Mohan [this message]
2024-03-14 15:00 ` [PATCH bpf-next 1/2] bpf: Add arm64 JIT support for PROBE_MEM32 pseudo instructions Puranjay Mohan
2024-03-14 17:07 ` Kumar Kartikeya Dwivedi
2024-03-14 17:13 ` Puranjay Mohan
2024-03-14 17:21 ` Alexei Starovoitov
2024-03-15 10:31 ` Puranjay Mohan
2024-03-14 15:00 ` [PATCH bpf-next 2/2] bpf: Add arm64 JIT support for bpf_addr_space_cast instruction Puranjay Mohan
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