Re: [Xen-devel] 32bit xen and "claim"

[Keir Fraser <keir@xxxxxxx>]

On 05/11/2012 19:16, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> 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



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