stable/for-linus-3.12-rc0-tag

 - Xen Trusted Platform Module (TPM) frontend driver - with the backend in MiniOS.
 - Scalability improvements in event channel.
 - Two extra Xen co-maintainers (David, Boris) and one going away (Jeremy)
Bug-fixes:
 - Make the 1:1 mapping work during early bootup on selective regions.
 - Add scratch page to balloon driver to deal with unexpected code still holding
   on stale pages.
 - Allow NMIs on PV guests (64-bit only)
 - Remove unnecessary TLB flush in M2P code.
 - Fixes duplicate callbacks in Xen granttable code.
 - Fixes in PRIVCMD_MMAPBATCH ioctls to allow retries
 - Fix for events being lost due to rescheduling on different VCPUs.
 - More documentation.