Re: [Qemu-stable] [PATCH] fix guest physical bits to match host, to go beyond 1TB guests

[Paolo Bonzini]

Il 16/07/2013 19:46, Paolo Bonzini ha scritto:
>>> >> (see PUD with bit >=40 set)
>> > 
>> > I am not sure I understand what caused this: if we are advertising 40
>> > physical bits to the guest, why are we ending up with a PUD with
>> > bit >= 40 set?
> Because we create a guest that has bigger memory than what we advertise
> in CPUID.
> 

Also, note that the guest does not really care about this CPUID.  It is
only used by KVM itself to decide which bits in the page tables are
reserved.

Paolo