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bpf, mips: Add JIT support for unconditional BSWAP

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The unconditional BSWAP instruction from the eBPF v4 ISA was not
implemented. This caused programs using the instruction to fall
back to the interpreter.

Implement the unconditional BSWAP instruction.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20260925231932.1063678-2-johan.almbladh@anyfinetworks.com
This commit is contained in:
Johan Almbladh 2026-09-26 01:19:31 +02:00 committed by Alexei Starovoitov
parent 6ac134ec93
commit 89d8e19811
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2 changed files with 8 additions and 0 deletions
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4
arch/mips/net/bpf_jit_comp32.c
View File

@ -1701,6 +1701,10 @@ int build_insn(const struct bpf_insn *insn, struct jit_context *ctx)
case BPF_ALU64 | BPF_MOD | BPF_X:
emit_divmod_r64(ctx, dst, src, BPF_OP(code), off);
break;
/* dst = bswap(dst) */
case BPF_ALU64 | BPF_END:
emit_bswap_r64(ctx, dst, imm);
break;
/* dst = htole(dst) */
/* dst = htobe(dst) */
case BPF_ALU | BPF_END | BPF_FROM_LE:

4
arch/mips/net/bpf_jit_comp64.c
View File

@ -876,6 +876,10 @@ int build_insn(const struct bpf_insn *insn, struct jit_context *ctx)
case BPF_ALU64 | BPF_MOD | BPF_X:
emit_alu_r64(ctx, dst, src, BPF_OP(code), off);
break;
/* dst = bswap(dst) */
case BPF_ALU64 | BPF_END:
emit_bswap_r64(ctx, dst, imm);
break;
/* dst = htole(dst) */
/* dst = htobe(dst) */
case BPF_ALU | BPF_END | BPF_FROM_LE: