Commit 90f426d3 authored by Ilya Leoshkevich's avatar Ilya Leoshkevich Committed by Alexei Starovoitov
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s390/bpf: Implement unconditional byte swap 



Implement the cpuv4 unconditional byte swap, which is encoded as
BPF_ALU64 | BPF_END | BPF_FROM_LE. Since s390x is big-endian, it's
the same as the existing BPF_ALU | BPF_END | BPF_FROM_LE.

Signed-off-by: default avatarIlya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230919101336.2223655-7-iii@linux.ibm.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 738476a0

arch/s390/net/bpf_jit_comp.c

+1 −0
Original line number Diff line number Diff line
@@ -1253,6 +1253,7 @@ static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, 
		}

		break;

	case BPF_ALU | BPF_END | BPF_FROM_LE:

	case BPF_ALU64 | BPF_END | BPF_FROM_LE:

		switch (imm) {

		case 16: /* dst = (u16) cpu_to_le16(dst) */

			/* lrvr %dst,%dst */