Re: [Xen-devel] VPMU interrupt unreliability

[Meng Xu <xumengpanda@xxxxxxxxx>]

On Fri, Oct 20, 2017 at 3:07 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>
> >>> On 19.10.17 at 20:20, <xumengpanda@xxxxxxxxx> wrote:
> > Is there any document about the possible attack via the vPMU? The
> > document I found (such as [1] and XSA-163) just briefly say that the
> > vPMU should be disabled due to security concern.
>
> Besides the other responses you've already got, I also recall there
> being at least some CPU models that would live lock upon the
> debug store being placed into virtual space not mapped by present
> pages.


Thank you very much for your explanation! :)


Best Regards,

Meng

-----------
Meng Xu
Ph.D. Candidate in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/

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