arm64: bpf: jit JMP_JSET_{X,K}

Original implementation commit e54bcde ("arm64: eBPF JIT compiler")
had the relevant code paths, but due to an oversight always fail jiting.

As a result, we had been falling back to BPF interpreter whenever a BPF
program has JMP_JSET_{X,K} instructions.

With this fix, we confirm that the corresponding tests in lib/test_bpf
continue to pass, and also jited.

...
[    2.784553] test_bpf: torvalds#30 JSET jited:1 188 192 197 PASS
[    2.791373] test_bpf: torvalds#31 tcpdump port 22 jited:1 325 677 625 PASS
[    2.808800] test_bpf: torvalds#32 tcpdump complex jited:1 323 731 991 PASS
...
[    3.190759] test_bpf: torvalds#237 JMP_JSET_K: if (0x3 & 0x2) return 1 jited:1 110 PASS
[    3.192524] test_bpf: torvalds#238 JMP_JSET_K: if (0x3 & 0xffffffff) return 1 jited:1 98 PASS
[    3.211014] test_bpf: torvalds#249 JMP_JSET_X: if (0x3 & 0x2) return 1 jited:1 120 PASS
[    3.212973] test_bpf: torvalds#250 JMP_JSET_X: if (0x3 & 0xffffffff) return 1 jited:1 89 PASS
...

Fixes: e54bcde ("arm64: eBPF JIT compiler")
Signed-off-by: Zi Shen Lim <[email protected]>
Acked-by: Will Deacon <[email protected]>
Acked-by: Yang Shi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

arch/arm64/net/bpf_jit_comp.c

@@ -476,6 +476,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
  case BPF_JGE:
  jmp_cond = A64_COND_CS;
  break;
+ case BPF_JSET:
  case BPF_JNE:
  jmp_cond = A64_COND_NE;
  break;