xen: do not release any memory under 1M in domain 0
authorIan Campbell <ian.campbell@citrix.com>
Thu, 28 Oct 2010 18:32:29 +0000 (11:32 -0700)
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Thu, 11 Nov 2010 01:19:25 +0000 (17:19 -0800)
commit9ec23a7f6d2537faf14368e066e307c06812c4ca
tree20be7a932dd58b8f58e69c5d61415f9ecd1514a8
parent6903591f314b8947d0e362bda7715e90eb9df75e
xen: do not release any memory under 1M in domain 0

We already deliberately setup a 1-1 P2M for the region up to 1M in
order to allow code which assumes this region is already mapped to
work without having to convert everything to ioremap.

Domain 0 should not return any apparently unused memory regions
(reserved or otherwise) in this region to Xen since the e820 may not
accurately reflect what the BIOS has stashed in this region.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
arch/x86/xen/setup.c