s390/bpf,jit: add support for BPF_S_ANC_ALU_XOR_X instruction

Add support for new BPF_S_ANC_ALU_XOR_X instruction which got added
with ffe06c17 "filter: add XOR operation".

s390 version of 4bfaddf1 "x86 bpf_jit: support BPF_S_ANC_ALU_XOR_X instruction".

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

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index f57f0c335b1d..9b355b406afa 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -367,6 +367,11 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct sock_filter *filter,
                         /* o %r5,<d(K)>(%r13) */
                         EMIT4_DISP(0x5650d000, EMIT_CONST(K));
                 break;
+        case BPF_S_ANC_ALU_XOR_X: /* A ^= X; */
+                jit->seen |= SEEN_XREG;
+                /* xr %r5,%r12 */
+                EMIT2(0x175c);
+                break;
         case BPF_S_ALU_LSH_X: /* A <<= X; */
                 jit->seen |= SEEN_XREG;
                 /* sll %r5,0(%r12) */