[PATCH bpf-next v2 0/6] Zbb support and code simplification for RV64 JIT
Pu Lehui
pulehui at huaweicloud.com
Mon Sep 18 20:58:33 PDT 2023
Add Zbb support [0] to optimize code size and performance of RV64 JIT.
Meanwhile, adjust the code for unification and simplification. Tests
test_bpf.ko and test_verifier have passed, as well as the relative
testcases of test_progs*.
Link: https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0-38-g865e7a7.pdf [0]
v2:
- Add runtime detection for Zbb instructions. (Conor Dooley)
- Correct formatting issues detected by checkpatch. (Simon Horman)
v1:
https://lore.kernel.org/bpf/20230913153413.1446068-1-pulehui@huaweicloud.com/
Pu Lehui (6):
riscv, bpf: Unify 32-bit sign-extension to emit_sextw
riscv, bpf: Unify 32-bit zero-extension to emit_zextw
riscv, bpf: Simplify sext and zext logics in branch instructions
riscv, bpf: Add necessary Zbb instructions
riscv, bpf: Optimize sign-extention mov insns with Zbb support
riscv, bpf: Optimize bswap insns with Zbb support
arch/riscv/net/bpf_jit.h | 124 +++++++++++++++++++
arch/riscv/net/bpf_jit_comp64.c | 213 +++++++++++---------------------
2 files changed, 195 insertions(+), 142 deletions(-)
--
2.25.1
More information about the linux-riscv
mailing list