Re: [Xen-devel] Re: dom0 bootstrap for xenstore

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 16 Jun 2005, at 14:55, Keir Fraser wrote:

> Either we need a new interface for mmaping local xenstore page, or we 
> need to hack one of the existing /dev/mem or xc_map_foreign_range 
> ioctl. None of these options is very pleasant. :-(  I think simplest 
> would be to extend the gross /proc/xen/privcmd to have a mmap that we 
> can use to mmap xenstore page (maybe make a little more general 
> purpose by turning offset field of mmap into an enumeration, so we can 
> map other useful Xen-specific bits and bobs via it in the future).
Brainwave: what if you mark the xenstore page as PageReserved? This is 
easy to do if you allocate the page from within the kernel (rather than 
user space) as you can mark it reserved at the same time you allocate 
it. Then you ought to be able to use xc_map_foreign_page without 
problems. And it makes sense -- the xenstore page is not a normal 
page-cache/VM page.
I think this is a one-line addition to your previous patch. :-)

 -- Keir


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