stable/for-linus-3.7-x86-tag

Features:
 * When hotplugging PCI devices in a PV guest we can allocate Xen-SWIOTLB later.
 * Cleanup Xen SWIOTLB.
 * Support pages out grants from HVM domains in the backends.
 * Support wild cards in xen-pciback.hide=(BDF) arguments.
 * Update grant status updates with upstream hypervisor.
 * Boot PV guests with more than 128GB.
 * Cleanup Xen MMU code/add comments.
 * Obtain XENVERS using a preferred method.
 * Lay out generic changes to support Xen ARM.
 * Allow privcmd ioctl for HVM (used to do only PV).
 * Do v2 of mmap_batch for privcmd ioctls.
 * If hypervisor saves the LED keyboard light - we will now instruct the kernel
   about its state.
Fixes:
 * More fixes to Xen PCI backend for various calls/FLR/etc.
 * With more than 4GB in a 64-bit PV guest disable native SWIOTLB.
 * Fix up smatch warnings.
 * Fix up various return values in privmcmd and mm.
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