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Re: [Xen-devel] EPT question - XENMEM_get_access_op

On Fri, Feb 20, 2015 at 3:21 PM, Balbir Singh <bsingharora@xxxxxxxxx> wrote:
> [snip]
> On Fri, Feb 20, 2015 at 5:21 PM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>> Thanks Jan! Is there a way for a memevents channel consumer to get
>>> access to the L1 (OS Page tables).
>> Hardly.
>>> I presume we'll need to walk the
>>> page tables, I suspect the current access_op is broken without it and
>>> may not be returning anything meaningful in most of the cases
>> It's not broken in any way, you just seem to have wrong expectations.
> Probably, because I am interested in the final protection as seen by
> an application or kernel and I'm trying to find a way to get that
> information. For me the effective permission set is of interest.
> Balbir

You can get the guest pagetable permissions via LibVMI:


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