RE: [Xen-devel] [PATCH 1/2][VTD] pci mmconfig support to be used for ATS

["Kay, Allen M" <allen.m.kay@xxxxxxxxx>]

>
>If this is x86-64 only anyway, why do you need to use fixmap 
>space for this (and limit things arbitrarily to 4 segments) 
>rather than using a 256Mb block from one of the unused virtual 
>address regions in hypervisor space?

Can you point me how to use unused virtual address region to do ioremap without 
using fixmap?  Is there a existing code that is already doing this? 

>
>Also, using obj-$(CONFIG_X86_64) in the Makefile changes would 
>avoid building dead code for x86-32...
>

Will do.  Thanks!

Allen
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