From 0845c3db7bf5c4ceb7100bcd8fd594d9ccf3c29a Mon Sep 17 00:00:00 2001 From: Yonghong Song Date: Thu, 27 Jul 2023 18:12:13 -0700 Subject: bpf: Support new unconditional bswap instruction The existing 'be' and 'le' insns will do conditional bswap depends on host endianness. This patch implements unconditional bswap insns. Acked-by: Eduard Zingerman Signed-off-by: Yonghong Song Link: https://lore.kernel.org/r/20230728011213.3712808-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov --- kernel/bpf/core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'kernel/bpf/core.c') diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index c37c454b09eb..ad58697cec4b 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -1524,6 +1524,7 @@ EXPORT_SYMBOL_GPL(__bpf_call_base); INSN_3(ALU64, DIV, X), \ INSN_3(ALU64, MOD, X), \ INSN_2(ALU64, NEG), \ + INSN_3(ALU64, END, TO_LE), \ /* Immediate based. */ \ INSN_3(ALU64, ADD, K), \ INSN_3(ALU64, SUB, K), \ @@ -1848,6 +1849,19 @@ select_insn: break; } CONT; + ALU64_END_TO_LE: + switch (IMM) { + case 16: + DST = (__force u16) __swab16(DST); + break; + case 32: + DST = (__force u32) __swab32(DST); + break; + case 64: + DST = (__force u64) __swab64(DST); + break; + } + CONT; /* CALL */ JMP_CALL: -- cgit v1.2.3