On Tue, Aug 11, 2015 at 06:41:28PM +0100, Julien Grall wrote: > Direct mapped domain has already the memory allocated 1:1, so we are > directly using the gfn as mfn to map the RAM in the guest. > > While we are validating that the page associated to the first mfn belongs to > the domain, the subsequent MFN are not validated when the extent_order > is > 0. > > This may result to map memory region (MMIO, RAM) which doesn't belong to the > domain. > > Although, only DOM0 on ARM is using a direct memory mapped. So it > doesn't affect any guest (at least on the upstream version) or even x86. > > Signed-off-by: Julien Grall <julien.gr...@citrix.com> > > --- > Cc: Ian Campbell <ian.campb...@citrix.com> > Cc: Ian Jackson <ian.jack...@eu.citrix.com> > Cc: Jan Beulich <jbeul...@suse.com> > Cc: Keir Fraser <k...@xen.org> > Cc: Tim Deegan <t...@xen.org> > > This patch is a candidate for Xen 4.6 and backport to Xen 4.5 (and > maybe 4.4). >
Fine by me in principle for this patch to go in 4.6. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
