Hi Liu Yi, I haven't started to read the code yet, however, could you detail more please? It emulates a SVM capable iommu device in a VM? Or It speeds up device's DMA access in a VM? Or it is a new facility introduced for a VM? Could you please add a bit more for its usage? Thanks! On 04/26/2017 06:11 PM, Liu, Yi L wrote:
Hi, This patchset introduces SVM virtualization for intel_iommu in IOMMU/VFIO. The total SVM virtualization for intel_iommu touched Qemu/IOMMU/VFIO. Another patchset would change the Qemu. It is "[RFC PATCH 0/20] Qemu: Extend intel_iommu emulator to support Shared Virtual Memory" In this patchset, it adds two new IOMMU APIs and their implementation in intel_iommu driver. In VFIO, it adds two IOCTL cmd attached on container->fd to propagate data from QEMU to kernel space. [Patch Overview] * 1 adds iommu API definition for binding guest PASID table * 2 adds binding PASID table API implementation in VT-d iommu driver * 3 adds iommu API definition to do IOMMU TLB invalidation from guest * 4 adds IOMMU TLB invalidation implementation in VT-d iommu driver * 5 adds VFIO IOCTL for propagating PASID table binding from guest * 6 adds processing of pasid table binding in vfio_iommu_type1 * 7 adds VFIO IOCTL for propagating IOMMU TLB invalidation from guest * 8 adds processing of IOMMU TLB invalidation in vfio_iommu_type1 Best Wishes, Yi L Jacob Pan (3): iommu: Introduce bind_pasid_table API function iommu/vt-d: add bind_pasid_table function iommu/vt-d: Add iommu do invalidate function Liu, Yi L (5): iommu: Introduce iommu do invalidate API function VFIO: Add new IOTCL for PASID Table bind propagation VFIO: do pasid table binding VFIO: Add new IOCTL for IOMMU TLB invalidate propagation VFIO: do IOMMU TLB invalidation from guest drivers/iommu/intel-iommu.c | 146 ++++++++++++++++++++++++++++++++++++++++ drivers/iommu/iommu.c | 32 +++++++++ drivers/vfio/vfio_iommu_type1.c | 98 +++++++++++++++++++++++++++ include/linux/dma_remapping.h | 1 + include/linux/intel-iommu.h | 11 +++ include/linux/iommu.h | 47 +++++++++++++ include/uapi/linux/vfio.h | 26 +++++++ 7 files changed, 361 insertions(+)
