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 E0186C433F5 for ; Tue, 15 Mar 2022 21:07:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351835AbiCOVI7 (ORCPT ); Tue, 15 Mar 2022 17:08:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343868AbiCOVI6 (ORCPT ); Tue, 15 Mar 2022 17:08:58 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 695D61FE for ; Tue, 15 Mar 2022 14:07:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647378464; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SN1lVi51UEx0rS1GDQEkwEDHB11Ld9R4lvr1AnjiHX4=; b=Eow9OV/VjpPyeeguH4H+gYnnsNU3lC4GO16Givv72yeJFffd2Eh5xkcuCnmBLQcTvZojyi exQxvsJp181OZjHiQ2YInfZno7xRiKwmdLTq6+HQvbGZRz+Gcvisxgibp86ZnNT/BXQ0EW xx2HjLqRzo+jqYNYRv+EMJZ0CsWa5wc= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-332-PM_Sma2UMJiFpwEFaNafCQ-1; Tue, 15 Mar 2022 17:07:43 -0400 X-MC-Unique: PM_Sma2UMJiFpwEFaNafCQ-1 Received: by mail-ed1-f72.google.com with SMTP id i5-20020a056402054500b00415ce7443f4so165850edx.12 for ; Tue, 15 Mar 2022 14:07:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=SN1lVi51UEx0rS1GDQEkwEDHB11Ld9R4lvr1AnjiHX4=; b=FNRltdM03bAimF47JXb/pxWa2RBY33zn0mK+/YgEj+xJLpMhrWWmqMTK24TPY8SmsW jFl9oUJaYu4CAcrhTvXVVp7bz+T9noRsc2DRNayV9SOYzT/ptfEkqnvMI8EIy2ASMY29 wth+bdiOiBBpqjekI7bklp7mh3CEMCLITsg7yhtZoGYV8pP8YFBSfsI9aoHNeDQueEBe QhrkqO7kspGDbMgOa+BtnAvlkUNmpXpNde4X1Bks6FKKgXFUC3z4fqY8KCr7bylWI0BK bvmfrz6m/rCz223l+CqmGp02XS2O+5ZwidOjJ0BASbWFh3hbdymGZ++ljXJV+W2St7vl DnmA== X-Gm-Message-State: AOAM532EwhD5UX0DGe/19QCp5vrXlVfusfrNkVzC50vSsB91gWGSPU03 FfeJIbAA1tnzC+TjGygzxfV1WwOJGypTUdQQnhl4GuzPq4UMRDbNhni5hMGcpCiHiCY8BK8/nTJ MhxWJgDou3sOJ X-Received: by 2002:a17:906:7056:b0:6d6:dd99:f2a4 with SMTP id r22-20020a170906705600b006d6dd99f2a4mr23963048ejj.43.1647378460006; Tue, 15 Mar 2022 14:07:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzk/xTyM6bm9sOWWR5ouWoP0fdL8AJCBzc0MXluxO2y+Er6xcFyG55VdSgC7XQnlDKji/y9EA== X-Received: by 2002:a17:906:7056:b0:6d6:dd99:f2a4 with SMTP id r22-20020a170906705600b006d6dd99f2a4mr23963037ejj.43.1647378459811; Tue, 15 Mar 2022 14:07:39 -0700 (PDT) Received: from ?IPV6:2001:b07:6468:f312:63a7:c72e:ea0e:6045? ([2001:b07:6468:f312:63a7:c72e:ea0e:6045]) by smtp.googlemail.com with ESMTPSA id y12-20020a50eb8c000000b00410f02e577esm58944edr.7.2022.03.15.14.07.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Mar 2022 14:07:39 -0700 (PDT) Message-ID: Date: Tue, 15 Mar 2022 22:07:37 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH] x86: kvm Require const tsc for RT Content-Language: en-US To: Sebastian Andrzej Siewior , kvm@vger.kernel.org, x86@kernel.org Cc: Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Ingo Molnar , Jim Mattson , Joerg Roedel , Sean Christopherson , Thomas Gleixner , Vitaly Kuznetsov , Wanpeng Li References: From: Paolo Bonzini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 3/14/22 10:28, Sebastian Andrzej Siewior wrote: > On 2022-03-01 18:55:51 [+0100], To kvm@vger.kernel.org wrote: >> From: Thomas Gleixner >> Date: Sun, 6 Nov 2011 12:26:18 +0100 >> >> Non constant TSC is a nightmare on bare metal already, but with >> virtualization it becomes a complete disaster because the workarounds >> are horrible latency wise. That's also a preliminary for running RT in >> a guest on top of a RT host. >> >> Signed-off-by: Thomas Gleixner >> Signed-off-by: Sebastian Andrzej Siewior > > ping. Queued, thanks. Paolo