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Message-Id: <20250719091730.2660197-1-pulehui@huaweicloud.com>
Date: Sat, 19 Jul 2025 09:17:20 +0000
From: Pu Lehui <pulehui@...weicloud.com>
To: bpf@...r.kernel.org,
linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org
Cc: Björn Töpel <bjorn@...nel.org>,
Puranjay Mohan <puranjay@...nel.org>,
Palmer Dabbelt <palmer@...belt.com>,
Alexandre Ghiti <alex@...ti.fr>,
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@...ichev.me>,
Hao Luo <haoluo@...gle.com>,
Jiri Olsa <jolsa@...nel.org>,
Pu Lehui <pulehui@...wei.com>
Subject: [PATCH bpf-next 00/10] Add support arena atomics for RV64
From: Pu Lehui <pulehui@...wei.com>
patch 1-3 refactor redundant load and store operations.
patch 4-7 add Zacas instructions for cmpxchg.
patch 8 optimizes exception table handling.
patch 9-10 add support arena atomics for RV64.
Tests `test_progs -t atomic,arena` have passed as shown bellow,
as well as `test_verifier` and `test_bpf.ko` have passed.
$ ./test_progs -t arena,atomic
#3/1 arena_atomics/add:OK
#3/2 arena_atomics/sub:OK
#3/3 arena_atomics/and:OK
#3/4 arena_atomics/or:OK
#3/5 arena_atomics/xor:OK
#3/6 arena_atomics/cmpxchg:OK
#3/7 arena_atomics/xchg:OK
#3/8 arena_atomics/uaf:OK
#3/9 arena_atomics/load_acquire:OK
#3/10 arena_atomics/store_release:OK
#3 arena_atomics:OK
#4/1 arena_htab/arena_htab_llvm:OK
#4/2 arena_htab/arena_htab_asm:OK
#4 arena_htab:OK
#5/1 arena_list/arena_list_1:OK
#5/2 arena_list/arena_list_1000:OK
#5 arena_list:OK
#6/1 arena_spin_lock/arena_spin_lock_1:OK
#6/2 arena_spin_lock/arena_spin_lock_1000:OK
#6/3 arena_spin_lock/arena_spin_lock_50000:OK
#6 arena_spin_lock:OK
#10 atomic_bounds:OK
#11/1 atomics/add:OK
#11/2 atomics/sub:OK
#11/3 atomics/and:OK
#11/4 atomics/or:OK
#11/5 atomics/xor:OK
#11/6 atomics/cmpxchg:OK
#11/7 atomics/xchg:OK
#11 atomics:OK
#513/1 verifier_arena/basic_alloc1:OK
#513/2 verifier_arena/basic_alloc2:OK
#513/3 verifier_arena/basic_alloc3:OK
#513/4 verifier_arena/basic_reserve1:OK
#513/5 verifier_arena/basic_reserve2:OK
#513/6 verifier_arena/reserve_twice:OK
#513/7 verifier_arena/reserve_invalid_region:OK
#513/8 verifier_arena/iter_maps1:OK
#513/9 verifier_arena/iter_maps2:OK
#513/10 verifier_arena/iter_maps3:OK
#513 verifier_arena:OK
#514/1 verifier_arena_large/big_alloc1:OK
#514/2 verifier_arena_large/access_reserved:OK
#514/3 verifier_arena_large/request_partially_reserved:OK
#514/4 verifier_arena_large/free_reserved:OK
#514/5 verifier_arena_large/big_alloc2:OK
#514 verifier_arena_large:OK
Summary: 8/39 PASSED, 0 SKIPPED, 0 FAILED
Pu Lehui (10):
riscv, bpf: Extract emit_stx() helper
riscv, bpf: Extract emit_st() helper
riscv, bpf: Extract emit_ldx() helper
riscv: Separate toolchain support dependency from RISCV_ISA_ZACAS
riscv, bpf: Add rv_ext_enabled macro for runtime detection extentsion
riscv, bpf: Add Zacas instructions
riscv, bpf: Optimize cmpxchg insn with Zacas support
riscv, bpf: Add ex_insn_off and ex_jmp_off for exception table
handling
riscv, bpf: Add support arena atomics for RV64
selftests/bpf: Enable arena atomics tests for RV64
arch/riscv/Kconfig | 1 -
arch/riscv/include/asm/cmpxchg.h | 6 +-
arch/riscv/kernel/setup.c | 1 +
arch/riscv/net/bpf_jit.h | 70 ++-
arch/riscv/net/bpf_jit_comp64.c | 516 +++++-------------
.../selftests/bpf/progs/arena_atomics.c | 9 +-
6 files changed, 214 insertions(+), 389 deletions(-)
--
2.34.1
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