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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 0257EC10DCE for ; Fri, 6 Mar 2020 09:45:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA9972073D for ; Fri, 6 Mar 2020 09:45:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Onj9kiOE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726185AbgCFJo7 (ORCPT ); Fri, 6 Mar 2020 04:44:59 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:22257 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726034AbgCFJo7 (ORCPT ); Fri, 6 Mar 2020 04:44:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583487898; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=WbxIdYhTTjgVlUuu7acZggNhYjFYj5XT7w4bg+bKCpo=; b=Onj9kiOE+6sRUX8Pyw9bTJxHkGmbprAHh7OgMhFJLqpmEujvUAz1J4NJPP+9nXH/DU0XrI otuPBdFd2RhVlRsKe1B9xqBIx+6FvjE5CMbhrpn0QFLa2IU4bQvtSK7p3j7cTUFT2k3AXg hzdc1CySqRFEqpu3r/o7QQ7VZhl7Z3U= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-461-n8LusmgWPoyaGjNvTbhvvw-1; Fri, 06 Mar 2020 04:44:56 -0500 X-MC-Unique: n8LusmgWPoyaGjNvTbhvvw-1 Received: by mail-wr1-f71.google.com with SMTP id u8so762919wrq.13 for ; Fri, 06 Mar 2020 01:44:56 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:in-reply-to:references:date :message-id:mime-version; bh=WbxIdYhTTjgVlUuu7acZggNhYjFYj5XT7w4bg+bKCpo=; b=h+HTJLaKMyKp/eqFNoORARS+JzPrP8I55sXF/o0q3wmAhWSGGx2OawCZ9mnpqCoFHD ijPzeyQanMxxzS36SS/S2P6/npkb9c3/E69P4aAU/lkodUI4meN0TWH0tjJ1ryw5yuYe +phclv0H9auzrG2vrjUe1zfdcBfaZttFGHGPpCB4HqmgPeL5ucxHZbreIg28PcwBgX3o w95oO2t7QsvsTBEXYqsJPpVFAJo3PqrcMAkQ78Kj0IZktJ4PLOjWgusZdM45ogHBcezw ToyEVEqVGuGDBHEDqWL3SD7rNdb59DjCMphPvv4AlOA2MWpSIDdkWDHsy1lT+QMvj1Li OBBg== X-Gm-Message-State: ANhLgQ3JqRXw+d80cf6iElF0PM3TOF6hOZNjF6BMlKeTJ5s1O5XpQqK8 4zzfG7pgl4gcNnM9cHtlEWGpWjtCo9wIGHK7uTn9NrHWyNsIV81m5CmlmTZDa3ywpgeijPHr1ri 99LfAYtDrbrE5xLXcPF79tehx X-Received: by 2002:a1c:7919:: with SMTP id l25mr3019502wme.135.1583487895752; Fri, 06 Mar 2020 01:44:55 -0800 (PST) X-Google-Smtp-Source: ADFU+vvxjBVBTvy10EKYcXioKSADNfuDaKvIrnd4UdrjOTMe11WoR4rkgftir/YuAN37Jpblb9nk5g== X-Received: by 2002:a1c:7919:: with SMTP id l25mr3019483wme.135.1583487895545; Fri, 06 Mar 2020 01:44:55 -0800 (PST) Received: from vitty.brq.redhat.com (nat-pool-brq-t.redhat.com. [213.175.37.10]) by smtp.gmail.com with ESMTPSA id p15sm12572147wma.40.2020.03.06.01.44.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Mar 2020 01:44:54 -0800 (PST) From: Vitaly Kuznetsov To: Paolo Bonzini , linmiaohe Cc: "rkrcmar\@redhat.com" , "sean.j.christopherson\@intel.com" , "jmattson\@google.com" , "joro\@8bytes.org" , "tglx\@linutronix.de" , "mingo\@redhat.com" , "bp\@alien8.de" , "hpa\@zytor.com" , "kvm\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" , "x86\@kernel.org" Subject: Re: [PATCH] KVM: VMX: Use wrapper macro ~RMODE_GUEST_OWNED_EFLAGS_BITS directly In-Reply-To: <1e3f7ff0-0159-98e8-ba21-8806c3a14820@redhat.com> References: <1e3f7ff0-0159-98e8-ba21-8806c3a14820@redhat.com> Date: Fri, 06 Mar 2020 10:44:53 +0100 Message-ID: <87sgiles16.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Paolo Bonzini writes: > On 06/03/20 03:17, linmiaohe wrote: >> Define a macro RMODE_HOST_OWNED_EFLAGS_BITS for (X86_EFLAGS_IOPL | >> X86_EFLAGS_VM) as suggested by Vitaly seems a good way to fix this ? >> Thanks. > > No, what if a host-owned flag was zero? I'd just leave it as is. > I'm not saying my suggestion was a good idea but honestly I'm failing to wrap my head around this. The suggested 'RMODE_HOST_OWNED_EFLAGS_BITS' would just be a define for (X86_EFLAGS_IOPL | X86_EFLAGS_VM) so technically the patch would just be nop, no? -- Vitaly