From: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com> Currently, when pass-through dGPU to a guest VM, there are thousands of IOTLB flush commands sent from IOMMU to end-point-device. This cause performance issue when launching new VMs, and could cause IOTLB invalidate time-out issue on certain dGPUs.
This can be avoided by adopting the new fast IOTLB flush APIs. Cc: Alex Williamson <alex.william...@redhat.com> Cc: Joerg Roedel <jroe...@suse.de> Suravee Suthikulpanit (2): vfio/type1: Adopt fast IOTLB flush interface when unmap IOVAs iommu/amd: Add support for fast IOTLB flushing drivers/iommu/amd_iommu.c | 77 ++++++++++++++++++++++++++++++++++++++++- drivers/iommu/amd_iommu_init.c | 2 -- drivers/iommu/amd_iommu_types.h | 2 ++ drivers/vfio/vfio_iommu_type1.c | 12 +++++-- 4 files changed, 87 insertions(+), 6 deletions(-) -- 1.8.3.1
