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Re: [Qemu-devel] [PATCH 4/5] x86: Allow physical address bits to be set

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 4/5] x86: Allow physical address bits to be set
Date: Fri, 17 Jun 2016 11:54:45 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0

On 17/06/2016 11:37, Dr. David Alan Gilbert wrote:
>>> The existing 40-bit default looks like a problem for 36-bit
>>> > > systems. Do you know what kind of systems have 36 bits only? Only
>>> > > old ones, or recent ones too? If only old ones, how old?
>> > 
>> > My Sandy Bridge (~2.5 year old) laptop is 36 bits; I've seen
>> > some other single-socket 39bit machines (Ivy bridge and I think newer).
> and it looks like the single socket Xeons are as well; Xeon E3-1225
> I just found has 36 bit physical.

The Xeon E3 is really little more than a Core i7 (for example it doesn't
have APICv).  Laurent checked a single-socket Sandy Bridge Xeon E5-1620
and it has 46.


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