Passthrough support for AMD-IOMMU (AMD-Vi)

Hi,

this series of patches implement iommu=pt support for AMD IOMMU (AMD-Vi). If
this option is passed on the kernel command line, the AMD-Vi driver will not
register itself as the dma_ops backend and allows all devices unlimited access
to main memory as long as no other kernel part (currently only KVM will do so)
assigns the device to another domain using the IOMMU-API.

Joerg

Diffstat:


 arch/x86/include/asm/amd_iommu.h       |    1 +
 arch/x86/include/asm/amd_iommu_types.h |    4 +
 arch/x86/kernel/amd_iommu.c            |  140 +++++++++++++++++++++++++++----
 arch/x86/kernel/amd_iommu_init.c       |    8 ++-
 arch/x86/kernel/pci-dma.c              |    9 ++-
 5 files changed, 142 insertions(+), 20 deletions(-)

Shortlog:

Joerg Roedel (8):
      x86/dma: Mark iommu_pass_through as __read_mostly
      x86/amd-iommu: Add core functions for pd allocation/freeing
      x86/amd-iommu: Add passthrough mode initialization functions
      x86/amd-iommu: Fix device table write order
      x86/amd-iommu: Align locking between attach_device and detach_device
      x86/amd-iommu: Make sure a device is assigned in passthrough mode
      x86/amd-iommu: Don't detach device from pt domain on driver unbind
      x86/amd-iommu: Initialize passthrough mode when requested


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