Re: [Xen-devel] [PATCH 4/6] X86: MPX IA32_BNDCFGS msr save/restore

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

Jan Beulich wrote:
>>>> On 02.12.13 at 09:44, "Liu, Jinsong" <jinsong.liu@xxxxxxxxx> wrote:
>> Jan Beulich wrote:
>>> Instead I think we should have a generic MSR save/restore type,
>>> pairing MSR indices and values in an array like fashion. If the
>>> restoring host doesn't know how to handle any one of them, the
>>> restore would fail. Extending it with further MSR values would
>>> then become a much smaller change than the full blown addition
>>> of a new save/restore type.
>> 
>> OK, I have implemented a generic MSR save/restore way, w/ MPX MSR.
> 
> Thanks - I'll take a look.
> 
>> As for vPMU it's a distinct issue. Currently Xen vPMU does not
>> support migration because of interrupt issue, and it didn't consider
>> version issue of architectural PMU which under different version
>> there are different MSRs. 
> 
> Okay, so no immediate need to include that MSR here. But is there
> anything done to prevent migration of a domain using the vPMU?
> 

CC Haitao who is author of Xen vPMU :)

Thanks,
Jinsong


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