diff options
| author | Xiao Wang <[email protected]> | 2024-05-24 15:55:43 +0800 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2024-06-03 16:45:23 +0200 |
| commit | 96a27ee76f0e95b56f94b6902da7a5ebef372612 (patch) | |
| tree | 24657fa8ed9ffa3b3c22cfd1503a43d34b51bd27 /arch/riscv/net/bpf_jit_comp32.c | |
| parent | 531876c80004ecff7bfdbd8ba6c6b48835ef5e22 (diff) | |
riscv, bpf: Introduce shift add helper with Zba optimization
Zba extension is very useful for generating addresses that index into array
of basic data types. This patch introduces sh2add and sh3add helpers for
RV32 and RV64 respectively, to accelerate addressing for array of unsigned
long data.
Signed-off-by: Xiao Wang <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Björn Töpel <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'arch/riscv/net/bpf_jit_comp32.c')
| -rw-r--r-- | arch/riscv/net/bpf_jit_comp32.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/riscv/net/bpf_jit_comp32.c b/arch/riscv/net/bpf_jit_comp32.c index f5ba73bb153d..592dd86fbf81 100644 --- a/arch/riscv/net/bpf_jit_comp32.c +++ b/arch/riscv/net/bpf_jit_comp32.c @@ -811,8 +811,7 @@ static int emit_bpf_tail_call(int insn, struct rv_jit_context *ctx) * if (!prog) * goto out; */ - emit(rv_slli(RV_REG_T0, lo(idx_reg), 2), ctx); - emit(rv_add(RV_REG_T0, RV_REG_T0, lo(arr_reg)), ctx); + emit_sh2add(RV_REG_T0, lo(idx_reg), lo(arr_reg), ctx); off = offsetof(struct bpf_array, ptrs); if (is_12b_check(off, insn)) return -1; |