From: Artem Savkov Date: Fri, 17 May 2024 07:56:49 +0000 (+0200) Subject: powerpc64/bpf: jit support for sign extended mov X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=597b1710982d10b8629697e4a548b30d0d93eeed;p=users%2Fjedix%2Flinux-maple.git powerpc64/bpf: jit support for sign extended mov Add jit support for sign extended mov. Tested using test_bpf module. Signed-off-by: Artem Savkov Signed-off-by: Michael Ellerman Link: https://msgid.link/20240517075650.248801-5-asavkov@redhat.com --- diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c index ca3ca6e01db2..063e5e92f01e 100644 --- a/arch/powerpc/net/bpf_jit_comp64.c +++ b/arch/powerpc/net/bpf_jit_comp64.c @@ -676,8 +676,14 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code /* special mov32 for zext */ EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0, 0, 31)); break; - } - EMIT(PPC_RAW_MR(dst_reg, src_reg)); + } else if (off == 8) { + EMIT(PPC_RAW_EXTSB(dst_reg, src_reg)); + } else if (off == 16) { + EMIT(PPC_RAW_EXTSH(dst_reg, src_reg)); + } else if (off == 32) { + EMIT(PPC_RAW_EXTSW(dst_reg, src_reg)); + } else if (dst_reg != src_reg) + EMIT(PPC_RAW_MR(dst_reg, src_reg)); goto bpf_alu32_trunc; case BPF_ALU | BPF_MOV | BPF_K: /* (u32) dst = imm */ case BPF_ALU64 | BPF_MOV | BPF_K: /* dst = (s64) imm */