[vbox-dev] R: Re: R: Re: I: EPT structures
carlo.cianfarani at alice.it
carlo.cianfarani at alice.it
Fri Apr 12 07:09:56 GMT 2013
Any idea ?
----Messaggio originale----
Da: carlo.cianfarani at alice.it
Data: 9-apr-2013 9.22
A: <vbox-dev at virtualbox.org>
Ogg: R: Re: [vbox-dev] R: Re: I: EPT structures
Just some question to understand how it works...
If I understand correctly, it is in charge of VirtualBox code (running in VMX-root mode ?) the setup the VMCS area (4KB) for each VM instance. In each VMCS's area exists a field for the EPT pointer (basically the physical address in main memory of the first-level EPT paging structures)
Now if that is correct, do you think it does exist other ways (including digging in the host system hosting virtualBox's process) to access & traverse those translation structures ?
Thanks.
----Messaggio originale----
Da: ramshankar.venkataraman at oracle.com
Data: 8-apr-2013 18.50
A: "carlo.cianfarani at alice.it"<carlo.cianfarani at alice.it>
Cc: <vbox-dev at virtualbox.org>
Ogg: Re: [vbox-dev] R: Re: I: EPT structures
If we find the need and time for it. In
the meantime, we welcome patches :)
Regards,
Ram.
On 04/08/2013 06:25 PM, carlo.cianfarani at alice.it wrote:
Is there a plan for it ?
----Messaggio originale----
Da: klaus.espenlaub at oracle.com
Data: 8-apr-2013 16.24
A: <vbox-dev at virtualbox.org>
Ogg: Re: [vbox-dev] I: EPT structures
The error message says it all - not implemented.
Klaus
On 06.04.2013 15:24, carlo.cianfarani at alice.it wrote:
> Any idea ?
>
> Thanks.
>
> ----Messaggio originale----
> Da: carlo.cianfarani at alice.it
> Data: 4-apr-2013 16.08
> A: <vbox-dev at virtualbox.org>
> Ogg: EPT structures
>
> Hi,
>
> posting the following question on virtualbox forum a
guy suggested
> to ask for it here...
>
>
> I'm trying to use the Debug command line (VirtualBox
version 4.2.10)
> just to dig into some internals...
>
> Does it exist a way to view the EPT page table used by
the processor
> (core i5 in my system) when resolving a guest's virtual
address into
> a host physical one ?
>
> trying to do it:
>
> VBoxDbg> dphh %0
> cr3=a93ea000 idx=0i66 Extended Page Tables
> EPT dumping is not yet implemented, sorry.
> not present
> dphh: error: DBGFR3PagingDumpEx: VERR_NOT_IMPLEMENTED
> VBoxDbg>
>
> thanks,
> Carlo.
>
>
>
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