stable/for-linus-3.14-rc0-tag

 - FIFO event channels. Key advantages: support for over 100,000 events (2^17),
   16 different event priorities, improved fairness in event latency through
   the use of FIFOs.
 - Xen PVH support. "It’s a fully PV kernel mode, running with paravirtualized
   disk and network, paravirtualized interrupts and timers, no emulated devices
   of any kind (and thus no qemu), no BIOS or legacy boot — but instead of
   requiring PV MMU, it uses the HVM hardware extensions to virtualize the
   pagetables, as well as system calls and other privileged operations."
   (from "The Paravirtualization Spectrum, Part 2: From poles to a spectrum")
Bug-fixes:
 - Fixes in balloon driver (refactor and make it work under ARM)
 - Allow xenfb to be used in HVM guests.
 - Allow xen_platform_pci=0 to work properly.
 - Refactors in event channels.