Xen devel - Oct 2007 - passing a cpumask to the hypervisor as an uint8_t

Keir, Kevin -

Could you please provide the code snippet
for passing the cpumask out of the Linux
dom0 to the Xen hypervisor in the new
getidletime platform op?  Linux cpumasks
are structures to an array of unsigned
long, but getidletime takes it as a 
XEN_GUEST_HANDLE(uint8_t).  I can''t figure
out the conversation.  Thanks in advanace.

-Mark Langsdorf
Operating System Research Center
AMD



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Actually, on x86 you don''t have to do anything. Little-endian bitmaps
do not
have a granularity (byte-chunked bitmap is same as a longword-chunked
bitmap).

 -- Keir

On 26/10/07 17:37, "Langsdorf, Mark" <mark.langsdorf@amd.com>
wrote:
> Keir, Kevin -
> 
> Could you please provide the code snippet
> for passing the cpumask out of the Linux
> dom0 to the Xen hypervisor in the new
> getidletime platform op?  Linux cpumasks
> are structures to an array of unsigned
> long, but getidletime takes it as a
> XEN_GUEST_HANDLE(uint8_t).  I can''t figure
> out the conversation.  Thanks in advanace.
> 
> -Mark Langsdorf
> Operating System Research Center
> AMD
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel


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