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Re: [Xen-devel] <Second Try>: mapping xen pages into a domain
- To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
- From: "sanjay kumar" <sanjay.kushwaha@xxxxxxxxx>
- Date: Sun, 26 Mar 2006 17:34:03 +0000
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Sun, 26 Mar 2006 17:35:31 +0000
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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
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
--
----------------------
PhD Student, Georgia Tech
http://www.cc.gatech.edu/~ksanjay/
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