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powerpc64/bpf: jit support for sign extended mov

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

Signed-off-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240517075650.248801-5-asavkov@redhat.com
This commit is contained in:
Artem Savkov 2024-05-17 09:56:49 +02:00 committed by Michael Ellerman
parent 717756c9c8
commit 597b171098
1 changed files with 8 additions and 2 deletions
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10
arch/powerpc/net/bpf_jit_comp64.c
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@ -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 */