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xen-devel
Re: [Xen-devel] Grant tables from dom0 userspace?
On 9 Mar 2006, at 17:59, Jacob Gorm Hansen wrote:
I would like to share some pages between my domU graphics frontend
device, and the backend which runs in userspace in dom0. Right now I
am doing this with my own scheme, but presumably grant tables would be
the correct solution.
Is it possible to use grant tables from dom0 userspace? There used to
be a file called tools/libxc/xc_gnttab.c but that seems to be gone
now.
I think blktap gives an example how to do this, but it might be
specific to aio right now. You could probably use some of the same
hooks to provide a device file that you could mmap(), passing grant
refs to map. I cc'ed Andy Warfield in case he has any ideas...
The only other supported mechanism is the xc_foreign mapping interfaces.
-- Keir
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