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

["sanjay kumar" <sanjay.kushwaha@xxxxxxxxx>]

Hi Keir,
I am kind of stuck here. Could you or someone please point me to an
example code where guest (or dom0) kernel is mapping the page
(allocated by Xen using share_xen_page_with_guest()) in its own memory.

Thanks,
Sanjay

On 3/22/06, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

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/
> _______________________________________________
> Xen-devel mailing list
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-- 
----------------------
PhD Student, Georgia Tech
http://www.cc.gatech.edu/~ksanjay/
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