From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mathieu Ropert <mro@adviseo.fr>
Subject: Re: Trouble using update_va_mapping
Date: Tue, 14 Feb 2006 14:28:14 +0100
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	<98973538f8321c2ea43f52a5231916ee@cl.cam.ac.uk>
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To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
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Keir Fraser wrote:

>
> On 13 Feb 2006, at 16:06, Mathieu Ropert wrote:
>
>> i'm trying to run a very simple domU kernel on Xen/x86_64, and i'm 
>> getting some trouble with update_va_mapping(): when trying to remap 
>> some page table entry, i find the virtual address still pointing to 
>> the same machine address after the return of the hypercall.
>
>
> What machine page does 'cons' point at before update_va_mapping()? Is 
> it definitely a different page?
>
>  -- Keir
>
Done some more checks and found the bug: the virtual address i used was 
mis-aligned  (missing a 0x in .align directive :)).
How does update_va_mapping() should normally behave when given a non 
paged-aligned virtual address? From the code, i guess it just remap the 
page containing the given address (discarding the lower 12 bits). Is 
this intended?

Mathieu