Re: Getting a bus address for granted page in dom0

[tgh <tianguanhua@ncic.ac.cn>]

hi
I try to read the granttable code of xen,I am confused about some fields
in the struct grant_table,such as struct grant_entry **shared; struct
active_grant_entry **active; struct grant_mapping **maptrack; what are
the functions for the three structures ?
I am confused about it

could you help me
Thanks in advance







Kieran Mansley 写道:
> On Tue, 2006-11-07 at 11:26 +0000, Keir Fraser wrote:
>   
>> Do you need to map the rings into dom0 addr space at all? If not just do a
>> GNTMAP_device_map yourself, and this will return a dev_bus_addr that you can
>> poke into hardware. If you go this route you avoid using the Linux DMA
>> interfaces altogether.
>>     
>
> Thanks Keir, that was exactly what I was looking for.
>
> I've implemented this as an extra little helper function in
> xenbus_backend_client.c as an alternative to xenbus_map_ring() and
> xenbus_map_ring_valloc().  Is this something of wider use/interest?  I'd
> be happy to submit a patch if so.
>
> Kieran
>
>
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