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[Xen-devel] Re: mapping xen pages into a domain
- To: xen-devel@xxxxxxxxxxxxxxxxxxx
- From: "sanjay kumar" <sanjay.kushwaha@xxxxxxxxx>
- Date: Fri, 17 Mar 2006 02:56:37 +0000
- Delivery-date: Fri, 17 Mar 2006 02:57:41 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
When the first time I posted this, it didn't appear on the mailing list. so posting my question again.
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/
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