On Fri, Sep 13, 2013 at 02:28:35PM +0000, KY Srinivasan wrote:
>
>
> > -----Original Message-----
> > From: Gleb Natapov [mailto:g...@redhat.com]
> > Sent: Friday, September 13, 2013 2:55 AM
> > To: KY Srinivasan
> > Cc: H. Peter Anvin; x...@kernel.org; gre...@linuxfoundation.org; linux-
> > ker...@vger.kernel.org; de...@linuxdriverproject.org; o...@aepfle.de;
> > a...@canonical.com; jasow...@redhat.com; t...@linutronix.de;
> > jbeul...@suse.com; b...@alien8.de
> > Subject: Re: [PATCH V2 1/1] X86: Hyper-V: Get the local APIC timer frequency
> > from the hypervisor
> >
> > On Fri, Sep 13, 2013 at 01:43:09AM +0000, KY Srinivasan wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: H. Peter Anvin [mailto:h...@zytor.com]
> > > > Sent: Thursday, September 12, 2013 5:28 PM
> > > > To: KY Srinivasan
> > > > Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-
> > ker...@vger.kernel.org;
> > > > de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
> > > > jasow...@redhat.com; t...@linutronix.de; jbeul...@suse.com;
> > b...@alien8.de
> > > > Subject: Re: [PATCH V2 1/1] X86: Hyper-V: Get the local APIC timer
> > > > frequency
> > > > from the hypervisor
> > > >
> > > > On 09/12/2013 05:06 PM, KY Srinivasan wrote:
> > > > >
> > > > > Peter,
> > > > >
> > > > > Let me know if you want me to address any additional issues in this
> > > > > patch.
> > > > >
> > > >
> > > > Please address Jan and Gleb's feedback.
> > >
> > > Gleb's feedback was a question and I answered that as I did Jan's
> > > feedback as
> > well.
> > > Gleb, Jan, please let me know if there is something else you want
> > > addressed
> > here.
> > >
> > No, I am just interesting to know some details about the interface since
> > I cannot find it documented in Hyper-V spec.
>
> Thanks Gleb. Here is the link for the latest Hyper-V specification:
> http://www.microsoft.com/en-us/download/details.aspx?id=39289
>
> This spec talks about how migration is handled with regards to TSC.
>
All I can see is "15.4.3 Partition Reference TSC Mechanism". I see
nothing about HV_X64_MSR_TSC_FREQUENCY specifically. To access this MSR
a partition needs AccessFrequencyMsrs privilege, may be partition that
cab be migrated does not have this privilege?
--
Gleb.
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