diff options
| author | Pu Lehui <pulehui@huawei.com> | 2023-08-24 12:49:57 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-08-24 19:13:08 +0300 |
| commit | 694896ad3ca79b3291efaf29702a94d2568b5279 (patch) | |
| tree | 2204df9fef1ad0a9016c7338096b984f61f77ccb /arch | |
| parent | 3d06d8163f98594dfb950c3aeae9f798e4fb45c7 (diff) | |
| download | linux-694896ad3ca79b3291efaf29702a94d2568b5279.tar.xz | |
riscv, bpf: Support sign-extension mov insns
Add support sign-extension mov instructions for RV64.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20230824095001.3408573-4-pulehui@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/net/bpf_jit_comp64.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index fd36cb17101a..bcf1e7509cb9 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1047,7 +1047,19 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx, emit_zext_32(rd, ctx); break; } - emit_mv(rd, rs, ctx); + switch (insn->off) { + case 0: + emit_mv(rd, rs, ctx); + break; + case 8: + case 16: + emit_slli(RV_REG_T1, rs, 64 - insn->off, ctx); + emit_srai(rd, RV_REG_T1, 64 - insn->off, ctx); + break; + case 32: + emit_addiw(rd, rs, 0, ctx); + break; + } if (!is64 && !aux->verifier_zext) emit_zext_32(rd, ctx); break; |