Re: [Xen-devel] [PATCH v2] VMX: allocate APIC access page from domain heap

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Friday, December 18, 2015 3:50 PM
> 
> ... since we don't need its virtual address anywhere (it's a
> placeholder page only after all). For this to work (and possibly be
> done elsewhere too) share_xen_page_with_guest() needs to mark pages
> handed to it as Xen heap ones.
> 
> To be on the safe side, also explicitly clear the page (not having done
> so was okay due to the XSA-100 fix, but is still a latent bug since we
> don't formally guarantee allocations to come out zeroed, and in fact
> this property may disappear again as soon as the asynchronous runtime
> scrubbing patches arrive).
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>

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