Re: [Xen-devel] [PATCH] Cleanup/fix virt_to_maddr

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 24/1/07 11:01, "Christoph Egger" <Christoph.Egger@xxxxxxx> 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


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