Commit 597b1710 authored by Artem Savkov's avatar Artem Savkov Committed by Michael Ellerman
Browse files

powerpc64/bpf: jit support for sign extended mov 



Add jit support for sign extended mov. Tested using test_bpf module.

Signed-off-by: default avatarArtem Savkov <asavkov@redhat.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240517075650.248801-5-asavkov@redhat.com
parent 717756c9

arch/powerpc/net/bpf_jit_comp64.c

+8 −2
Original line number Diff line number Diff line
@@ -676,7 +676,13 @@ 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;

			}

			} 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 */