On 2017年02月07日 16:28, Peter Xu wrote:
This patch is based on Aviv Ben-David (<bd.a...@gmail.com>)'s patch upstream: "IOMMU: enable intel_iommu map and unmap notifiers" https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html However I removed/fixed some content, and added my own codes. Instead of translate() every page for iotlb invalidations (which is slower), we walk the pages when needed and notify in a hook function. This patch enables vfio devices for VT-d emulation. And, since we already have vhost DMAR support via device-iotlb, a natural benefit that this patch brings is that vt-d enabled vhost can live even without ATS capability now. Though more tests are needed.
Michael, if you want to apply this series, I would propose a better title for this patch e.g "cowork with remote IOMMU/IOTLB"
Thanks
Reviewed-by: Jason Wang <jasow...@redhat.com> Signed-off-by: Peter Xu <pet...@redhat.com> --- hw/i386/intel_iommu.c | 191 ++++++++++++++++++++++++++++++++++++++--- hw/i386/intel_iommu_internal.h | 1 + hw/i386/trace-events | 1 + include/hw/i386/intel_iommu.h | 8 ++ 4 files changed, 188 insertions(+), 13 deletions(-)
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