From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99A86C433FE for ; Mon, 3 Oct 2022 01:17:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229561AbiJCBRu (ORCPT ); Sun, 2 Oct 2022 21:17:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229520AbiJCBRo (ORCPT ); Sun, 2 Oct 2022 21:17:44 -0400 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6DF2B36DE1 for ; Sun, 2 Oct 2022 18:17:43 -0700 (PDT) Received: from pps.filterd (m0044012.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 292FXUnJ002903 for ; Sun, 2 Oct 2022 18:17:43 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=facebook; bh=hlp5ryTmqjBjQ2EEXTXmXfekvKB1OsQjLVQVH3KW2MU=; b=TGcGd+26mavBDPjJvc0eDCyKRAI6t4yw014+oflS8UjJFwueS2CWRDIqqN+iJpXYBAG0 anTeKy4Ws2VkYico86U4tM7s+W12yD/HFzQspay3/fD6tHumBxmogo8Huz+AuWXZYJPO 0jpzMD430WXxr5L7MAM2tSMTTU2NWUJbAA0= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3jxk8qxy2m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sun, 02 Oct 2022 18:17:43 -0700 Received: from twshared13579.04.prn5.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::d) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sun, 2 Oct 2022 18:17:41 -0700 Received: by devbig150.prn5.facebook.com (Postfix, from userid 187975) id 734F410FF8977; Sun, 2 Oct 2022 18:17:29 -0700 (PDT) From: Jie Meng To: , , , CC: Jie Meng Subject: [PATCH bpf-next] bpf,x64: Remove unnecessary check on existence of SSE2 Date: Sun, 2 Oct 2022 18:17:27 -0700 Message-ID: <20221003011727.1192900-1-jmeng@fb.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: rbRmADNS7_Cb6XclFJ_q0navoKQGfpNX X-Proofpoint-ORIG-GUID: rbRmADNS7_Cb6XclFJ_q0navoKQGfpNX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-10-02_04,2022-09-29_03,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org SSE2 and hence lfence are architectural in x86-64 and no need to check whether they're supported in CPU. Signed-off-by: Jie Meng --- arch/x86/net/bpf_jit_comp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index d09c54f3d2e0..b2124521305e 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -1289,8 +1289,7 @@ static int do_jit(struct bpf_prog *bpf_prog, int *a= ddrs, u8 *image, u8 *rw_image =20 /* speculation barrier */ case BPF_ST | BPF_NOSPEC: - if (boot_cpu_has(X86_FEATURE_XMM2)) - EMIT_LFENCE(); + EMIT_LFENCE(); break; =20 /* ST: *(u8*)(dst_reg + off) =3D imm */ --=20 2.30.2