Received: by 2002:a25:ef43:0:0:0:0:0 with SMTP id w3csp48748ybm; Thu, 28 May 2020 15:46:25 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz9IggYbfecddw7RxTZzB873JE+BEyts9PRRLmDgQP3yWmQvt5VI7F6Sn0xu5ZW2HB+XMYs X-Received: by 2002:a17:906:f198:: with SMTP id gs24mr4963964ejb.547.1590705985597; Thu, 28 May 2020 15:46:25 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590705985; cv=none; d=google.com; s=arc-20160816; b=UNtwYXzIst4Nc+Dsx92BAByy87Le4jlXFPxdt3koNDvg+PonVFY9ce4Kjfh5XnKvTt 1jmEHZM1PFQQmxX65wyk88iD62X1rkdRohBJ0rVX+TzBhVgE+LVrbL0AgVa9YxloVnUJ 8iVTxg16BpLltuP97m/yt5Mt4ALlLShS4dzge4HNgUrFxM8nE5OAo+X1bLVb3aCGy8LY WVsCD8BODhDCp+50X0u91dWow+zovSyAHZgcMtZQTjwHeFRL3drCYfUv0lCxEfSYfWtI OEfRwNuroNYEgyVlYqNBxJ2idJKJ4nG3TLgkpMfZeqpkSSYhHSplz0tfkFVdO8cB++Eq ygFQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:dkim-signature; bh=IEfGi4dyFMuYwCLRVBWXpuKxbIcboEwlu5YMHVWkvwU=; b=Bk0BS9HbSt3krlZ4f1AdhXNRaM5O1xlMYaesMKgRtrbk8dZKNz9uhovOPij8YGRo4x ddMBx1MbuZJhTLFo+bV8FRDTkpa2IeeNBlGWIZTsQe31VBzE5LirYwbVxFQwW2f/XczO lOvMSapg3+fZzfc962+OVGYRrmYcTl4wYvWYL1Puu0BqM+lNF/hEyOhupa0Qm8Txh5Gs 7wfZjBAOhESANeiAygC/GQTAnjs0VeCcYmC2dODHu8xFLHsb7h3oGW0Lsd7e6am/h82G FMkiUN+F4kdfKwlG8FTBFp1GpArLAxj6D/lHaCY4jXo4vzxl6nAxOT4UJvivGcRyroD+ YR5Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=Jz5H+K0L; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id o18si4605904ejm.8.2020.05.28.15.46.02; Thu, 28 May 2020 15:46:25 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=Jz5H+K0L; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437266AbgE1WnB (ORCPT + 99 others); Thu, 28 May 2020 18:43:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437076AbgE1Wm6 (ORCPT ); Thu, 28 May 2020 18:42:58 -0400 Received: from mail-io1-xd41.google.com (mail-io1-xd41.google.com [IPv6:2607:f8b0:4864:20::d41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53A57C08C5C6 for ; Thu, 28 May 2020 15:42:58 -0700 (PDT) Received: by mail-io1-xd41.google.com with SMTP id c8so286618iob.6 for ; Thu, 28 May 2020 15:42:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=IEfGi4dyFMuYwCLRVBWXpuKxbIcboEwlu5YMHVWkvwU=; b=Jz5H+K0LECOpJV+x5y5LzisTdw0mBwpNBAWX0ryNwkXHFicCczhJWkTy7cyfBTaoh8 7UDbLYj2s0zAXp62JNi2RahdJWGo7317KyHjlyBaUQgE26pYk3YCSSvxuPtJ27rvY6Ou I5rFFKjOqq1PWOVQhH2jYfo6RftnqRYqgeziTykblZfbmDwphViFy4xXbFc3buPYnEiG gN0bGGtBTVt4wrf+MlgHub54Gn6nmsqOXirjbkEUikMqic3jf8wKbVsNGDR8D4f4/dCF Dz0zx7E7z4Yc4+ApMbZmdC6bJ+V8YZjpU6BwBA5PQQaZWqREhVbzVhcx5Dj0jvQYFIMS eUyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=IEfGi4dyFMuYwCLRVBWXpuKxbIcboEwlu5YMHVWkvwU=; b=EMRoer3Lryy1ESYI35z3/nFcvGcLt+g20E4Q7CWE+yt4c+n6wzoDCvsxUlQOUnbmqo sq1P1372Teu2ebQDDb7SViyWojQnkZffixWFLw7hQTI+7EXbELCevYoqrt6vV2Fi5aab 8tHiRC9t724fAyYC/r9HQ7OhkznT8l4+J+9W0a2ufXCiE6AJi5aClpIduvkdX/1V/nWQ NX+upmj/ofWUnnpEJDwrRmCbjUd6CHtEDdPXNDIWRdbEPLKr+7mLUB3ZrskoJ0iO03oz 7N9H+qfht3f1FFTAq5Yv4Ryw4vm8fQxq2dtZZEdL/tPJKihfGIwsBNI2hUJovAw8FUWw y5dA== X-Gm-Message-State: AOAM5316vNScF1wF7kMclZ+BzeUrVJVBGxBhGmGc/QlcLSzBf+HM2rlN o/Y+IaXWVVMFuU6MpKLW32XGyM9OuC4gDwEY7+A= X-Received: by 2002:a05:6638:112c:: with SMTP id f12mr1888020jar.98.1590705777743; Thu, 28 May 2020 15:42:57 -0700 (PDT) MIME-Version: 1.0 References: <20200528201937.038455891@infradead.org> In-Reply-To: <20200528201937.038455891@infradead.org> From: Lai Jiangshan Date: Fri, 29 May 2020 06:42:46 +0800 Message-ID: Subject: Re: [PATCH 0/6] x86/entry: disallow #DB more To: Peter Zijlstra Cc: Thomas Gleixner , Andy Lutomirski , LKML , X86 ML , Lai Jiangshan , Sean Christopherson , andrew.cooper3@citrix.com, daniel.thompson@linaro.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 On Fri, May 29, 2020 at 4:25 AM Peter Zijlstra wrote: > > These patches disallow #DB during NMI/#MC and allow removing a lot of fugly code. > Hello Will #DB be allowed in #DF? Thanks Lai > Patch #6 should probably wait until we've got the KGDB situation sorted > because applying that makes a bad situation worse. > >