Re: [Xen-devel] [PATCH V5] x86/hvm: fix domain crash when CR3 has the noflush bit set

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 02/23/2018 09:29 AM, Razvan Cojocaru wrote:
> Lacking PCID support in the emulation layer creates two different way of
> handling the NOFLUSH being set: one is in hardware, and this happens for
> everything except the introspection case, and one in the emulation layer
> (this happens when an introspection agent asks Xen to emulate an
> instruction when it replies to an EPT fault vm_event).

Sorry, not when the introspection agent asks Xen to emulate an
instruction when it replies to an EPT fault vm_event, but when the
introspection agent wants to be able to veto a CR3 write - i.e. when the
introspection agent subscribes to CR3 write events.


Thanks,
Razvan


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