From: Artem Savkov <asavkov@redhat.com>
Date: Fri, 17 May 2024 07:56:47 +0000 (+0200)
Subject: powerpc64/bpf: jit support for unconditional byte swap
X-Git-Tag: v6.11-rc1~96^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a71c0b09a14db72d59c48a8cda7a73032f4d418b;p=thirdparty%2Flinux.git

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 f1d7fcdeb14a7..7de41e80c61fe 100644
--- 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) {