| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] What's allocated on head 1M region of domU?
Mark Williamson wrote:
>> I'm now try to read and write puseud physical memory of domU from Dom0
>> with xenaccess(this is using libxc).
>> #http://xenaccess.sourceforge.net/
>>
>
> Ah, cool. I'd not heard much about XenAccess for a while, but I see they're
> still progressing nicely - cool.
>
>
:-)
>> With xenaccess, I'm succeeded read and writing almost of the memory. But
>> It fail when I try to access head 1M region and some bit regions.
>> To be precise, xc_map_foreign_range() of libxc returns error code.
>> ** <javascript:goWordLink("to")>
>>
>
> What error code do you get? Are you trying to map the first meg all at once
> and it's failing, or does it fail if you map any page in the first meg? What
> exactly is the call that's failing?
>
> I guess if you were trying to map the guest's shared_info page then you might
> be disallowed...?
>
>
I try to map no all at once.
I've figured out that top xen kernel is sitting on top 1M region :-|
thanks Mark.
>> What's allocated on head 1M region of domU?
>> #and , Can I get a document about memory allocation of dom0 and DomU
>> somewhere?
>>
>
> See the comments starting around line 476 of xen/include/public/xen.h, which
> describes the start of day memory layout and defines some of the structures
> involved. This will not be the same once the guest is up and running because
> the guest will allocate its own full pagetables and make its own decisions
> about where it wants to put stuff. However, it'll at least give you some
> clues about how the guest is built initially... I hope this helps you some.
>
>
I read the parts you suggested to me.
It helps me great :-)
regards.
****************************************
HPCS lab
4th grade student of Colledge of Information Science, University of Tsukuba
Ryo Kanbayashi
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home