[SRU][N:linux][PATCH v2 2/5] powerpc64/bpf: jit support for unconditional byte swap

[Andrei Gherzan]

BugLink: https://bugs.launchpad.net/bugs/2072994

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

Signed-off-by: Artem Savkov <asavkov at redhat.com>
Reviewed-by: Hari Bathini <hbathini at linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
Link: https://msgid.link/20240517075650.248801-3-asavkov@redhat.com
(cherry picked from commit a71c0b09a14db72d59c48a8cda7a73032f4d418b)
Signed-off-by: Andrei Gherzan <andrei.gherzan at canonical.com>
---
 arch/powerpc/net/bpf_jit_comp64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index 3b2b5376569d..9f78bfc325b8 100644
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -663,11 +663,12 @@ int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, u32 *fimage, struct code
 		 */
 		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) {
-- 
2.43.0