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[Xen-devel] Question about xc_translate_foreign_address()

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: AP Xen <apxeng@xxxxxxxxx>
  • Date: Tue, 24 May 2011 21:47:51 -0700
  • Delivery-date: Tue, 24 May 2011 21:48:48 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

I have a question about xc_translate_foreign_address(). When this call
is issued for VCPU1 in a 2 VCPU guest where VCPU1 is in a paused state
and VCPU0 is active, there is a possibility that VCPU0 could change
the page tables that VCPU1 is using. There is a window where the
function could return incorrect information. Is this true or there is
something that prevents it from happening?


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