s390/bpf,jit: add support for XOR instruction

Add support for XOR instruction for use with X/K.

s390 JIT support for the new BPF_S_ALU_XOR_* instructions introduced
with 9e49e889 "filter: add XOR instruction for use with X/K".

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 1ff930167348..bb284419b0fd 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -389,10 +389,17 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct sock_filter *filter,
                         EMIT4_DISP(0x5650d000, EMIT_CONST(K));
                 break;
         case BPF_S_ANC_ALU_XOR_X: /* A ^= X; */
+        case BPF_S_ALU_XOR_X:
                 jit->seen |= SEEN_XREG;
                 /* xr %r5,%r12 */
                 EMIT2(0x175c);
                 break;
+        case BPF_S_ALU_XOR_K: /* A ^= K */
+                if (!K)
+                        break;
+                /* x %r5,<d(K)>(%r13) */
+                EMIT4_DISP(0x5750d000, EMIT_CONST(K));
+                break;
         case BPF_S_ALU_LSH_X: /* A <<= X; */
                 jit->seen |= SEEN_XREG;
                 /* sll %r5,0(%r12) */