From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Re: [PATCH][v4] PV extension of HVM(hybrid) support
	in	Xen
Date: Mon, 01 Mar 2010 17:49:55 -0800
Message-ID: <4B8C6EC3.2020307@goop.org>
References: <201003011743.41341.sheng@linux.intel.com>	<20100301102127.GA17243@whitby.uk.xensource.com>
	<201003011940.50685.sheng@linux.intel.com>
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To: Sheng Yang <sheng@linux.intel.com>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>, Ian Pratt <Ian.Pratt@eu.citrix.com>, xen-devel <xen-devel@lists.xensource.com>, Tim Deegan <Tim.Deegan@citrix.com>, Keir Fraser <Keir.Fraser@eu.citrix.com>
List-Id: xen-devel@lists.xenproject.org

On 03/01/2010 03:40 AM, Sheng Yang wrote:
> The issue is pv timer. It assumed the tsc start from 0, which is different
> from HVM. So I'd like to give it a explicit call here. Otherwise it can be
> hooked in evtchn binding, but I don't think that's clear...
>
>    
[...]
>> Only vcpu 0?  Doesn't this do horrible things to timekeeping in the guest?
>>      
> The other vcpus are initialized when it is brought up. TSC started from 0 is a
> fundamental assumption for pv clock in Linux...
>    

Could you expand on this?  Do you mean in the pvops Xen time code?  What 
do you mean?

     J