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 X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C7EAC7618F for ; Thu, 18 Jul 2019 00:02:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 36F5020873 for ; Thu, 18 Jul 2019 00:02:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="JzADRtkO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728715AbfGRACn (ORCPT ); Wed, 17 Jul 2019 20:02:43 -0400 Received: from mail-pl1-f202.google.com ([209.85.214.202]:54373 "EHLO mail-pl1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727804AbfGRACn (ORCPT ); Wed, 17 Jul 2019 20:02:43 -0400 Received: by mail-pl1-f202.google.com with SMTP id u10so12882776plq.21 for ; Wed, 17 Jul 2019 17:02:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=d2opEawD5+UpjHd3NqyX+5wHPW1XJIxl9MSYmfk275Q=; b=JzADRtkOw2096YFXxVSMAzsSWjQX8A9aoK4y1dNuoORdeMgF6K2He4c4O4zv+SvN1C UNqNMY/GIiooHoE15NvVgxlMs/qpJxGGW8RFAoHq/wQ6szsqmG6LnRHB4dULrMiW4Vzg IUj4LTC/4PLSbvqJwgooz1Mlzhu1UhCeAzoMilvUyGj/7izvs3+tWqOjcFQR2KUg25Si omfLoHXCTMhlrVNQEY9J5rCa7XG2EOcD+J5GGbnvSsBg6GUf8Gelz5fbj6EqKMRp7c0Y L5YSYp3s7fpOT6STKRp3YIixv/u1jSSDhY/5h3ag4LEIAN3yGLS7G6GAXS9ckGFD8wu0 1tmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=d2opEawD5+UpjHd3NqyX+5wHPW1XJIxl9MSYmfk275Q=; b=T1fOldl6iJ6NekwKGsyqDKex6rmZ6WjkBX8djz3yXVrVa14FB4wxcJ2HSltb38+/M0 naz2FeN9Qofi7uPfQ9VCZsAAx94fLGimIcOGuxSUG+dx1/7ad1yIxy2a/FIYtZbon2If TsoLwQgKPivr3qL3nMlkpd+yLJnVy2ryTE9xeQLNZIKABSvn2mTfTRVRKhfMmM6rrC+1 PBvcZ7nc/m1M9X/UBvZO/2IHa/3Z2N+saKOAkvS7EmeoAlv1xIko4LUOOg6TMNyqD+3U RMiZfCG3+0LWXKANsPpLw1RfRuOZtiRGc+iVcJB5/TNFVZXaAD+st3BYfMTy2ZeFO9VT ZYWg== X-Gm-Message-State: APjAAAXq6GqhWXB53TeeVhadKTRZO5DOnxy34GbcYDuNRc3v9liYuIev xt7YuCibDtwW15fTNerOrjP7LW0tgZuK/Am42DEJvQ== X-Google-Smtp-Source: APXvYqx8C+Hy6Xs2urAbdNvACQ68TCh4KNRmJw+r8zbsjI0Iz08oehTCqQsB2iYjkYZRoMBdYUgYRrzMAIY59zdjl7ZMAQ== X-Received: by 2002:a63:a35c:: with SMTP id v28mr728662pgn.144.1563408162493; Wed, 17 Jul 2019 17:02:42 -0700 (PDT) Date: Wed, 17 Jul 2019 17:02:05 -0700 In-Reply-To: <20190718000206.121392-1-vaibhavrustagi@google.com> Message-Id: <20190718000206.121392-2-vaibhavrustagi@google.com> Mime-Version: 1.0 References: <20190718000206.121392-1-vaibhavrustagi@google.com> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog Subject: [PATCH 1/2] x86/purgatory: add -mno-sse, -mno-mmx, -mno-sse2 to Makefile From: Vaibhav Rustagi To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Vivek Goyal , Vaibhav Rustagi , Nick Desaulniers , stable@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Compiling the purgatory code with clang results in using of mmx registers. $ objdump -d arch/x86/purgatory/purgatory.ro | grep xmm 112: 0f 28 00 movaps (%rax),%xmm0 115: 0f 11 07 movups %xmm0,(%rdi) 122: 0f 28 00 movaps (%rax),%xmm0 125: 0f 11 47 10 movups %xmm0,0x10(%rdi) Add -mno-sse, -mno-mmx, -mno-sse2 to avoid generating SSE instructions. Signed-off-by: Vaibhav Rustagi --- arch/x86/purgatory/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 3cf302b26332..3589ec4a28c7 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -20,6 +20,7 @@ KCOV_INSTRUMENT := n # sure how to relocate those. Like kexec-tools, use custom flags. KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -Os -mcmodel=large +KBUILD_CFLAGS += -mno-mmx -mno-sse -mno-sse2 KBUILD_CFLAGS += -m$(BITS) KBUILD_CFLAGS += $(call cc-option,-fno-PIE) -- 2.22.0.510.g264f2c817a-goog