From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: 32bit xen and "claim"
Date: Mon, 05 Nov 2012 19:50:14 +0000
Message-ID: <CCBDC8F6.51043%keir@xen.org>
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To: Dan Magenheimer <dan.magenheimer@oracle.com>, Jan Beulich <JBeulich@suse.com>
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On 05/11/2012 19:16, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:

>> xen/include/asm-x86/config.h:DIRECTMAP_* (and the comment
>> preceding all those #define-s).
> 
> Sorry if this is a silly question, but the hex value
> 0xffff880000000000 looks like a Linux kernel base address
> so it made me wonder:
> 
> Do I understand correctly that the 5TB limit only applies
> because of legacy PV guests?

Yes. For HVM guests we can direct-map all physical memory, all the time. We
will only ever need ephemeral mappings on x86/64 when running PV guests.

 -- Keir