[XenAccess-devel] What's allocated on top 1M region of domU?

[Ryo K. <kan...@hp...>]

Hi all.

I'm now try to read and write puseud physical memory of domU from Dom0
with xa_access_physical_address() using my snippet code(phys-access-from-head.c).
#for writ access, I modified xa_access_physical_address to access memory with PROT_WRITE flag.

Now, I'm succeeded read and writing almost of the memory. But
It fails when I try to access top 1M region and some bit regions.
To be precise, xc_map_foreign_range() of libxc returns error code 14.

What's allocated on top 1M region of domU?
#and , Can I get a document about memory allocation of dom0 and DomU
somewhere?

regards.


---environment----
xen: Xen 3.1.0
xenaccess: head revision of subversion repository
processor type: 32bit PAE
Entire Memory: 2G

DomU type: paravirtualized
DomU Memory size: 512M

---using snippet---
#2 is DomU domain number, 0x0c000000 is arbitrary address accessible
./phys-access-from-head.out 2 0x0c000000

****************************************
HPCS lab
4th grade student of Colledge of Information Science, University of Tsukuba

Ryo Kanbayashi


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筑波大学第三学群情報学類4年　
HPCS研究室

神林　亮