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| author | Jie Meng <jmeng@fb.com> | 2022-10-05 10:00:39 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-10-07 16:22:07 +0200 |
| commit | 2e30960097f6bc1a0dff89c0bcbc4138e3506d7c (patch) | |
| tree | b5a4f4c5853ca10e9695dfa45d6d6ead307a5c70 /arch/x86/net | |
| parent | 1d2d941bc140b34587b4c889699fb0f89d29937f (diff) | |
| download | linux-2e30960097f6bc1a0dff89c0bcbc4138e3506d7c.tar.bz2 | |
bpf, x64: Remove unnecessary check on existence of SSE2
SSE2 and hence lfence are architectural in x86-64 and no need to check
whether they're supported in CPU. SSE2's CPUID flag is still set to
maintain backward compatibility with older code or code shared with x86,
but bpf_jit_comp.c is compiled under x86-64 exclusively so the check is
redundant.
Signed-off-by: Jie Meng <jmeng@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20221005170039.3936894-1-jmeng@fb.com
Diffstat (limited to 'arch/x86/net')
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index 99620428ad78..0abd082786e7 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -1226,8 +1226,7 @@ static int do_jit(struct bpf_prog *bpf_prog, int *addrs, u8 *image, u8 *rw_image /* speculation barrier */ case BPF_ST | BPF_NOSPEC: - if (boot_cpu_has(X86_FEATURE_XMM2)) - EMIT_LFENCE(); + EMIT_LFENCE(); break; /* ST: *(u8*)(dst_reg + off) = imm */ |