On 10/13/11 13:47, Tim Deegan wrote:
At 21:07 +0800 on 11 Oct (1318367233), cc Luit wrote:
Why don't you just use EPT/NPT instead of shadow pagetables? That code
is a lot simpler and the end result is easier to validate than shadow
pagetables are. Is it particularly important to support shadow
pagetables?
yeah, we have consider that, and of course the EPT is much more convenient,
BTW, do you know is there any simulator that can well support EPT of xen?
the shadow page's problem is a little relevent to the selection of
simulator~
There's experimental support in Xen itself for running a hypervisor
inside a HVM guest. On AMD, that includes (and indeed requires) NPT in
the guest hypervisor.
Not quite right: guest hypervisor can use NPT but this is not required.
It may use shadow paging. But an AMD cpu with NPT capability is
required since shadow-on-shadow is not supported.
> Unfortunately, on Intel it does not include EPT.
There may be some other simulators that have EPT/NPT - I don't know.
Cheers,
Tim.
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