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[Xen-devel] Re: Question about EPT translation

  • To: henanwxr <henanwxr@xxxxxxxxxxx>
  • From: Daniel Castro <evil.dani@xxxxxxxxx>
  • Date: Mon, 30 May 2011 06:49:02 +0900
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 30 May 2011 01:56:28 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Next time I will only replay through the list. CC the list

2011/5/29 henanwxr <henanwxr@xxxxxxxxxxx>:
> Hi Daniel, I have post my questions on xen-devel but nobody reply. So I turn
> to you for help.
> 1. Does hvmoader need EPT for address translation when it  is running?
If you are talking to pure HVM Guest then yes.
> 2. I am sure the guest kernel need EPT when running, but not sure whether
> hvmloader also needs. I think  when virtual bios in hvmloader running, we
> should make virtual bios sees as if the memory starting from 0, so hvmloader
> needs EPT, am I right?
> 3. If hvmloader needs EPT, where we construct EPT structure for it? I can't
> find correlative part  in code flow.
The address translation is not done by hvmloader, hvmloader is only
used to deploy data to memory, the translation is done via Hypervisor
aided by hardware.

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| |   | Daniel Castro,                |
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