[PATCH v2 02/14] arm64: bpf: Remove big-endian support from the JIT compiler

[Will Deacon]

Big-endian support on arm64 depends on BROKEN. In preparation for
removing the dead code altogether, remove the big-endian-specific
support from the arm64 BPF JIT backend.

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Marc Zyngier <maz@xxxxxxxxxx>
Acked-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
---
 arch/arm64/net/bpf_jit_comp.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index c18e005a41db..a5634428fdd5 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -1439,13 +1439,8 @@ static int build_insn(const struct bpf_verifier_env *env, const struct bpf_insn
 	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 CONFIG_CPU_BIG_ENDIAN
-		if (BPF_CLASS(code) == BPF_ALU && BPF_SRC(code) == BPF_FROM_BE)
-			goto emit_bswap_uxt;
-#else /* !CONFIG_CPU_BIG_ENDIAN */
 		if (BPF_CLASS(code) == BPF_ALU && BPF_SRC(code) == BPF_FROM_LE)
 			goto emit_bswap_uxt;
-#endif
 		switch (imm) {
 		case 16:
 			emit(A64_REV16(is64, dst, dst), ctx);
@@ -2559,15 +2554,9 @@ static void clear_garbage(struct jit_ctx *ctx, int reg, int effective_bytes)
 {
 	if (effective_bytes) {
 		int garbage_bits = 64 - 8 * effective_bytes;
-#ifdef CONFIG_CPU_BIG_ENDIAN
-		/* garbage bits are at the right end */
-		emit(A64_LSR(1, reg, reg, garbage_bits), ctx);
-		emit(A64_LSL(1, reg, reg, garbage_bits), ctx);
-#else
 		/* garbage bits are at the left end */
 		emit(A64_LSL(1, reg, reg, garbage_bits), ctx);
 		emit(A64_LSR(1, reg, reg, garbage_bits), ctx);
-#endif
 	}
 }
 
-- 
2.55.0.979.g7e5102b832-goog