On Fri, Sep 13, 2013 at 02:28:35PM +0000, KY Srinivasan wrote: > > > > -----Original Message----- > > From: Gleb Natapov [mailto:gleb@xxxxxxxxxx] > > Sent: Friday, September 13, 2013 2:55 AM > > To: KY Srinivasan > > Cc: H. Peter Anvin; x86@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; linux- > > kernel@xxxxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxxxx; olaf@xxxxxxxxx; > > apw@xxxxxxxxxxxxx; jasowang@xxxxxxxxxx; tglx@xxxxxxxxxxxxx; > > JBeulich@xxxxxxxx; bp@xxxxxxxxx > > 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:hpa@xxxxxxxxx] > > > > Sent: Thursday, September 12, 2013 5:28 PM > > > > To: KY Srinivasan > > > > Cc: x86@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; linux- > > kernel@xxxxxxxxxxxxxxx; > > > > devel@xxxxxxxxxxxxxxxxxxxxxx; olaf@xxxxxxxxx; apw@xxxxxxxxxxxxx; > > > > jasowang@xxxxxxxxxx; tglx@xxxxxxxxxxxxx; JBeulich@xxxxxxxx; > > bp@xxxxxxxxx > > > > 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. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
