Pull xen updates from Juergen Gross:
 "Xen features and fixes:

   - a series from Boris Ostrovsky adding support for booting Linux as
     Xen PVH guest

   - a series from Juergen Gross streamlining the xenbus driver

   - a series from Paul Durrant adding support for the new device model
     hypercall

   - several small corrections"

* tag 'for-linus-4.11-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/privcmd: add IOCTL_PRIVCMD_RESTRICT
  xen/privcmd: Add IOCTL_PRIVCMD_DM_OP
  xen/privcmd: return -ENOTTY for unimplemented IOCTLs
  xen: optimize xenbus driver for multiple concurrent xenstore accesses
  xen: modify xenstore watch event interface
  xen: clean up xenbus internal headers
  xenbus: Neaten xenbus_va_dev_error
  xen/pvh: Use Xen's emergency_restart op for PVH guests
  xen/pvh: Enable CPU hotplug
  xen/pvh: PVH guests always have PV devices
  xen/pvh: Initialize grant table for PVH guests
  xen/pvh: Make sure we don't use ACPI_IRQ_MODEL_PIC for SCI
  xen/pvh: Bootstrap PVH guest
  xen/pvh: Import PVH-related Xen public interfaces
  xen/x86: Remove PVH support
  x86/boot/32: Convert the 32-bit pgtable setup code from assembly to C
  xen/manage: correct return value check on xenbus_scanf()
  x86/xen: Fix APIC id mismatch warning on Intel
  xen/netback: set default upper limit of tx/rx queues to 8
  xen/netfront: set default upper limit of tx/rx queues to 8