Pull xen updates from Juergen Gross:

 - Xen event channel handling fix for a regression with a rare kernel
   config and some added hardening

 - better support of running Xen dom0 in PVH mode

 - a cleanup for the xen grant-dma-iommu driver

* tag 'for-linus-6.9-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/events: increment refcnt only if event channel is refcounted
  xen/evtchn: avoid WARN() when unbinding an event channel
  x86/xen: attempt to inflate the memory balloon on PVH
  xen/grant-dma-iommu: Convert to platform remove callback returning void