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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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?

Jan


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