Received: by 2002:a05:6a10:f347:0:0:0:0 with SMTP id d7csp307353pxu;
        Tue, 1 Dec 2020 11:46:16 -0800 (PST)
X-Google-Smtp-Source: ABdhPJxNVTgkqWUtDA4eBK/x/jAYPfHsSI4r+c280S1eC5KLFpuepNUhhRbstxJ+opGVyboqt4hO
X-Received: by 2002:aa7:cc8f:: with SMTP id p15mr4741031edt.240.1606851976226;
        Tue, 01 Dec 2020 11:46:16 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; t=1606851976; cv=none;
        d=google.com; s=arc-20160816;
        b=yC4dR0lw66Phn5LUaEJkwQk08eV9ZfphcX8RSP4Z1CZHD1hxE7djIHbRRRzN1+Ht28
         Sh104CaDgZmU4q99iuIVqI6cGKIzFegBKNu2kSsihpYmmjzeltMCioQq86lXSh+6VSSm
         s17oh51o2Tr/TumCp4k6BZdxsV+w+l6tWrxi1o1zYuGKKgCZe+JZAtGSj3R8qbURGM6t
         Foy0nCBWLw26rsiwjVzaBPmLyeIEc7t4+xqcN8iLkpWLqJYSfkbdFxaXo8i0jKqcJglR
         /4cGwf9hT45LJLVekafrFj9cIEeNhv6nYxLT7J6k914hHxSa4enAYh3tbwkl646YsrxM
         P2Mw==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:mime-version:message-id:date:references
         :in-reply-to:subject:cc:to:dkim-signature:dkim-signature:from;
        bh=oZMSZJ9B+pz4ruoX5S7orWGoTaF0HgBc602QZCF7JU0=;
        b=YbBo6Qe6fGoJcIgnNhUPcI6Tf/7JKoU+ZHTe4qHo8pAaUhNn4faH/+FOL571skQ3jd
         2F2p/aVdr9nPi6fb+SF7NgXmxghaNiEFGGCGQRIktMbsfA+jxFDXjqxXTb1w1X3whwNT
         ds5jONI4qpXaIdf4gPbhnpJepn4Vek7lpHbBTDOHo1udIDHpl4m6roAO31GiWk6eFhpC
         Dse3r5UV1asOsLY4bG9E8ofSBabX2w25kVeZMFwkEhYO+e8qCQGV8LcI5pLPafmLOvUm
         Z34J+/OLVSOHP5IxivZFkNIeaRhTFOaHhUXdLKsmyrxWF3ZtD7Z53sdEvfu/TiCTUTw2
         l69w==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@linutronix.de header.s=2020 header.b=QyfQHzxc;
       dkim=neutral (no key) header.i=@linutronix.de;
       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=linutronix.de
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18])
        by mx.google.com with ESMTP id n11si556542edr.280.2020.12.01.11.45.52;
        Tue, 01 Dec 2020 11:46:16 -0800 (PST)
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=@linutronix.de header.s=2020 header.b=QyfQHzxc;
       dkim=neutral (no key) header.i=@linutronix.de;
       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=linutronix.de
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S2392456AbgLATob (ORCPT <rfc822;bowenwang.tinker@gmail.com>
        + 99 others); Tue, 1 Dec 2020 14:44:31 -0500
Received: from Galois.linutronix.de ([193.142.43.55]:57580 "EHLO
        galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S2388204AbgLATob (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 1 Dec 2020 14:44:31 -0500
From:   Thomas Gleixner <tglx@linutronix.de>
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de;
        s=2020; t=1606851829;
        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=oZMSZJ9B+pz4ruoX5S7orWGoTaF0HgBc602QZCF7JU0=;
        b=QyfQHzxckn7qkBjfSV1pVAqUbTsikduDPHWrdQAG4HTwq3CU87bm9fh86gPlw6fEmGjQRu
        FsIWiMLLpu8hq2exqVwQAmoAX/A9ua6qeL+qEQurSj2OvookL6Bfwym7sj+lxqoxq8Fkyy
        F22enYcGxORliy0GZB+lzqdE0V2En9mFxRrmdLXvh2gRd7d0+CB2vnghntpG9TiOp7kwfg
        2xYQO2IGZp/p29qKcHwRwJEGDte9MrezEjaoJL72J7zA8Gmd3Nw+EJkLg4JUH05w/l04le
        6TC0fOtF0Zkq9x9ETfEjMfGTXQgUv/lfOXL/WGRT37ZDof1+UXmE8zuC4J7Z2A==
DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de;
        s=2020e; t=1606851829;
        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=oZMSZJ9B+pz4ruoX5S7orWGoTaF0HgBc602QZCF7JU0=;
        b=IV+1qwmcMVimGabIbOlbCXyCdVSW8AFP3DTZ8qkuiNlrV6sVb/EFXVJQPGl2uW/HuMh/2E
        AMwe7s/QlMKY39AA==
To:     Maxim Levitsky <mlevitsk@redhat.com>, kvm@vger.kernel.org
Cc:     Paolo Bonzini <pbonzini@redhat.com>,
        Oliver Upton <oupton@google.com>,
        Ingo Molnar <mingo@redhat.com>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        open list <linux-kernel@vger.kernel.org>,
        Marcelo Tosatti <mtosatti@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Wanpeng Li <wanpengli@tencent.com>,
        Borislav Petkov <bp@alien8.de>,
        Jim Mattson <jmattson@google.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "open list\:DOCUMENTATION" <linux-doc@vger.kernel.org>,
        Joerg Roedel <joro@8bytes.org>,
        "maintainer\:X86 ARCHITECTURE \(32-BIT AND 64-BIT\)" <x86@kernel.org>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Maxim Levitsky <mlevitsk@redhat.com>
Subject: Re: [PATCH 1/2] KVM: x86: implement KVM_SET_TSC_PRECISE/KVM_GET_TSC_PRECISE
In-Reply-To: <20201130133559.233242-2-mlevitsk@redhat.com>
References: <20201130133559.233242-1-mlevitsk@redhat.com> <20201130133559.233242-2-mlevitsk@redhat.com>
Date:   Tue, 01 Dec 2020 20:43:49 +0100
Message-ID: <87h7p5fh1m.fsf@nanos.tec.linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, Nov 30 2020 at 15:35, Maxim Levitsky wrote:
> +  struct kvm_tsc_info {
> +	__u32 flags;
> +	__u64 nsec;
> +	__u64 tsc;
> +	__u64 tsc_adjust;
> +  };
> +
> +flags values for ``struct kvm_tsc_info``:
> +
> +``KVM_TSC_INFO_TSC_ADJUST_VALID``
> +
> +  ``tsc_adjust`` contains valid IA32_TSC_ADJUST value

Why exposing TSC_ADJUST at all? Just because?

Thanks,

        tglx