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[Xen-devel] [PATCHv5 0/2] x86/xen: fix dom0 boot with tboot

The first patch (for 3.11 and which should be considered for stable),
fixes boot failures caused by UNUSABLE regions in the e820 machine
memory map.  This typically occurs if tboot is used.

The second patch (for 3.12) is clean up some an inadvertant change to
the mappings setup during early init, as introduced in 3.5.  There is
no need for this to be backported though.

Changes in v5:
- Use the original approach of removing UNUSABLE regions as the
  previous fix did not work when backported to older kernels.

Changes in v4:
- Extend 1:1 mapping region to cover 0 - 1MiB. find_ibft_region()
  scans from 512 KiB and if this overlapped with a reserved region it
  would crash.

Changes in v3:
- Avoid the 1:1 mapping (except for the ISA region) by the early setup
  instead of removing UNUSABLE regions.

Changes in v2:
- Refactor getting the correct memory map.


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