David Vrabel 3cb83e46d0 x86/xen: compactly store large identity ranges in the p2m
Large (multi-GB) identity ranges currently require a unique middle page
(filled with p2m_identity entries) per 1 GB region.

Similar to the common p2m_mid_missing middle page for large missing
regions, introduce a p2m_mid_identity page (filled with p2m_identity
entries) which can be used instead.

set_phys_range_identity() thus only needs to allocate new middle pages
at the beginning and end of the range.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2014-05-15 16:14:44 +01:00
..
2013-11-09 00:16:29 -05:00
2014-03-11 10:16:18 -07:00
2014-03-04 16:17:17 +00:00