Re: [Xen-devel] <Second Try>: mapping xen pages into a domain

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

It's not an I/O page so your method won't work. You should use 
share_xen_page_with_guest() in Xen, and then the guest can map that 
page just like any other that it owns.
 -- Keir

On 22 Mar 2006, at 15:50, sanjay kumar wrote:

> Hi Folks,
>  I posted this question a few days ago. Could someone please help me 
> with this?
>  Thanks,
>  Sanjay
>
> On 3/16/06, sanjay kumar <sanjay.kushwaha@xxxxxxxxx> wrote:Hi Folks,
> >  I want to allocate a page in xen and share it with a domain so that 
> > I can use it for shared memory communication.
> >  I have allocated a page in Xen using
> >     base = _xmalloc(PAGE_SIZE, 0);
> >      base_pa = virt_to_phys(base);
> >
> >  I pass this physical address of the page i.e. base_pa to dom0. I 
> > also permit access to this page  to dom0 using
> >      ret = iomem_permit_access(d, base_pa, 1);
> >
> >  from dom0, I try to ioremap this page in dom0 using the base_pa and 
> > ioremap function
> >      base =  (unsigned long) ioremap(base_pa, PAGE_SIZE);
> >
> >  but the call to ioremap fails. Could anyone please tell me what I am 
> > doing wrong? What is the correct way to do this.
> >  Thanks,
> >  Sanjay
> >
> >
> >
> > --
> > ----------------------
> > PhD Student, Georgia Tech
> > http://www.cc.gatech.edu/~ksanjay/
>
> --
> ----------------------
> PhD Student, Georgia Tech
> http://www.cc.gatech.edu/~ksanjay/
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