powerpc64/bpf: jit support for unconditional byte swap

Add jit support for unconditional byte swap. Tested using BSWAP tests
from test_bpf module.

Signed-off-by: Artem Savkov <asavkov@redhat.com>
Reviewed-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240517075650.248801-3-asavkov@redhat.com

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index f1d7fcdeb14a72f51fa64a5ec58084063dc0dfd3..7de41e80c61fef7f5fa4bd005d939da273abadc0 100644 (file)
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -699,11 +699,12 @@ bpf_alu32_trunc:
                 */
                case BPF_ALU | BPF_END | BPF_FROM_LE:
                case BPF_ALU | BPF_END | BPF_FROM_BE:
+               case BPF_ALU64 | BPF_END | BPF_FROM_LE:
 #ifdef __BIG_ENDIAN__
                        if (BPF_SRC(code) == BPF_FROM_BE)
                                goto emit_clear;
 #else /* !__BIG_ENDIAN__ */
-                       if (BPF_SRC(code) == BPF_FROM_LE)
+                       if (BPF_CLASS(code) == BPF_ALU && BPF_SRC(code) == BPF_FROM_LE)
                                goto emit_clear;
 #endif
                        switch (imm) {