[PATCH] swiotlb updates for Xen dom0

[Jeremy Fitzhardinge]

Hi Fujita,

This series adds Xen support to x86 swiotlb.  This is mostly a matter of
adding some Xen code into the existing hooks in pci-swiotlb_64.c:
  - swiotlb_alloc_boot
  - swiotlb_arch_range_needs_mapping
  - swiotlb_phys_to_bus/bus_to_phys

These hooks are conditional on xen_pv_domain(), which compiles to a
constant 0 when CONFIG_XEN is not enabled (and is a simple variable
read when it is).

All the Xen-specific code is in xen-iommu.c.

This series is just the patches which touch lib/swiotlb.c or
pci-swiotlb_64.c.  You can see them with more context in:
   git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git for-linus/xen/dom0/swiotlb

Thanks,
	J

 arch/x86/kernel/pci-swiotlb_64.c |   31 ++++++++++++++++-
 arch/x86/xen/Kconfig             |    1 
 drivers/pci/xen-iommu.c          |   68 ++++++++++++++++++++++++++++++++++++---
 include/xen/swiotlb.h            |   38 +++++++++++++++++++++
 lib/swiotlb.c                    |    3 +
 5 files changed, 133 insertions(+), 8 deletions(-)


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