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[Qemu-devel] [PATCH 0/2] vfio: type1 iommu hugepage support
From: |
Alex Williamson |
Subject: |
[Qemu-devel] [PATCH 0/2] vfio: type1 iommu hugepage support |
Date: |
Fri, 24 May 2013 11:24:26 -0600 |
User-agent: |
StGit/0.16 |
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(-)
- [Qemu-devel] [PATCH 0/2] vfio: type1 iommu hugepage support,
Alex Williamson <=