This series let's the vfio type1 iommu backend take advantage of iommu
large page support. See patch 2/2 for the details. This has been
tested on both amd_iommu and intel_iommu, but only my AMD system has
large page support. I'd appreciate any testing and feedback on other
systems, particularly vt-d systems supporting large pages. Mapping
efficiency should be improved a bit without iommu hugepages, but I
hope that it's much more noticeable with huge pages, especially for
very large QEMU guests.
This change includes a clarification to the mapping expectations for
users of the type1 iommu, but is compatible with known users and works
with existing QEMU userspace supporting vfio. Thanks,
Alex
---
Alex Williamson (2):
vfio: Convert type1 iommu to use rbtree
vfio: hugepage support for vfio_iommu_type1
drivers/vfio/vfio_iommu_type1.c | 607 ++++++++++++++++++++++++---------------
include/uapi/linux/vfio.h | 8 -
2 files changed, 387 insertions(+), 228 deletions(-)
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
