x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map
authorMalcolm Crossley <malcolm.crossley@citrix.com>
Mon, 28 Sep 2015 10:36:52 +0000 (11:36 +0100)
committerDavid Vrabel <david.vrabel@citrix.com>
Mon, 28 Sep 2015 17:03:38 +0000 (18:03 +0100)
commit64c98e7f49100b637cd20a6c63508caed6bbba7a
tree70d735a944f96bfb85dc6408ce472859d656e548
parent0b34a166f291d255755be46e43ed5497cdd194f2
x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map

Sanitizing the e820 map may produce extra E820 entries which would result in
the topmost E820 entries being removed. The removed entries would typically
include the top E820 usable RAM region and thus result in the domain having
signicantly less RAM available to it.

Fix by allowing sanitize_e820_map to use the full size of the allocated E820
array.

Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
arch/x86/xen/setup.c