From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xensource.com>
Subject: Re: [PATCH] Cleanup/fix virt_to_maddr
Date: Wed, 24 Jan 2007 11:06:00 +0000
Message-ID: <C1DCEE18.822A%keir@xensource.com>
References: <200701241201.32215.Christoph.Egger@amd.com>
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On 24/1/07 11:01, "Christoph Egger" <Christoph.Egger@amd.com> wrote:

>> They're only used on Xen heap virtual addresses whose physical addresses
>> are always below 64MB. So there should be no issues in returning a ulong.
> 
> Oh, I see. So it's absolutely not used for domains (which I assumed)?

No, all it does is a simple arithmetic transformation (subtracting
PAGE_OFFSET) which is only valid for non-guest pages on x86_32. It can be
used for any page on x86_64, but there we have paddr_t==ulong.

 -- Keir