Xen devel - May 2007 - MFN to hypervisor page table translation?

I have a chunk of memory in the hypervisor that
I allocated with alloc_boot_low_pages(), which
seems to return an MFN.  I need to remove the
chunk of memory from the hypervisor''s page 
tables, so that the processor cannot speculate 
into it while running the hypervisor.  

In Linux, I would call pdg_offset() and 
work my way down the page tables to to
pte_offset_map.  What are the equivalent
function calls in Xen?  What include file
or source file should I be checking to
better understand this process?

Thanks in advance for any help.

-Mark Langsdorf
Operating System Research Center
AMD



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I have a chunk of memory in the hypervisor that
I allocated with alloc_boot_low_pages(), which
seems to return an MFN.  I need to remove the
chunk of memory from the hypervisor''s page
tables, so that the processor cannot speculate
into it while running the hypervisor. 

In Linux, I would call pdg_offset() and
work my way down the page tables to to
pte_offset_map.  What are the equivalent
function calls in Xen?  What include file
or source file should I be checking to
better understand this process?

Thanks in advance for any help.

-Mark Langsdorf
Operating System Research Center
AMD




_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

On 7/5/07 12:58, "Langsdorf, Mark" <mark.langsdorf@amd.com>
wrote:
> In Linux, I would call pdg_offset() and
> work my way down the page tables to to
> pte_offset_map.  What are the equivalent
> function calls in Xen?  What include file
> or source file should I be checking to
> better understand this process?
> 
> Thanks in advance for any help.
There isn¹t one. I would suggest you implement unmap_pages_from_xen(), and
crib from map_pages_to_xen() for how to do so.

 -- Keir



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