[0/7] iommu/amd: Always allow to map huge pages

Message

Joerg Roedel Nov. 9, 2018, 11:07 a.m. UTC

Hi,

the AMD IOMMU driver had an issue for a long time where it
didn't allow to map a huge-page when smaller mappings
existed at that address range before. The VFIO driver even
had a workaround for that behavior.

These patches fix the issue and remove the workaround from
the VFIO driver.

Please review.

Thanks,

	Joerg

Joerg Roedel (7):
  iommu/amd: Collect page-table pages in freelist
  iommu/amd: Introduce free_sub_pt() function
  iommu/amd: Ignore page-mode 7 in free_sub_pt()
  iommu/amd: Allow downgrading page-sizes in alloc_pte()
  iommu/amd: Restart loop if cmpxchg64 succeeded in alloc_pte()
  iommu/amd: Allow to upgrade page-size
  vfio/type1: Remove map_try_harder() code path

 drivers/iommu/amd_iommu.c       | 204 +++++++++++++++++++++-----------
 drivers/iommu/amd_iommu_types.h |   1 +
 drivers/vfio/vfio_iommu_type1.c |  33 +-----
 3 files changed, 137 insertions(+), 101 deletions(-)