From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.xen@gmail.com>
Subject: Re: Can't see more than 3.5GB of RAM / UEFI / no e820
 memory map detected
Date: Fri, 24 Aug 2012 21:05:50 +0100
Message-ID: <CC5D9D2E.3CD9A%keir.xen@gmail.com>
References: <5037BC5E.3010806@abpni.co.uk>
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To: Jonathan Tripathy <jonnyt@abpni.co.uk>, xen-devel@lists.xen.org
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On 24/08/2012 18:39, "Jonathan Tripathy" <jonnyt@abpni.co.uk> wrote:

>> That flipping has nothing to do with UEFI, just with the way grub.efi
>> works.
>> 
>> Proper UEFI support implies use of EFI's boot and run time services,
>> which only xen.efi currently does (and which, for those run time
>> services that get made available for use by Dom0, also requires an
>> enabled Dom0 kernel).
>> 
> Thanks for the clarification.
> 
> So from a security/reliability standpoint, nothing will be affected by
> flipping the if block?

It should simply make it more likely that Xen sees all your RAM. ;)

 -- Keir