On 2017/10/6 21:31, Jean-Philippe Brucker wrote:

Add two new ioctl for VFIO containers. VFIO_DEVICE_BIND_PROCESS creates a
bond between a container and a process address space, identified by a
device-specific ID named PASID. This allows the device to target DMA
transactions at the process virtual addresses without a need for mapping
and unmapping buffers explicitly in the IOMMU. The process page tables are
shared with the IOMMU, and mechanisms such as PCI ATS/PRI may be used to
handle faults. VFIO_DEVICE_UNBIND_PROCESS removed a bond identified by a
PASID.

How about hide bind/unbind into ioctl(VFIO_SET_IOMMU)? 
e.g always bind to current process in SET_IOMMU.

Not sure about the real use case.

Signed-off-by: Jean-Philippe Brucker <redacted>
---
 drivers/vfio/vfio_iommu_type1.c | 243 +++++++++++++++++++++++++++++++++++++++-
 include/uapi/linux/vfio.h       |  69 ++++++++++++
 2 files changed, 311 insertions(+), 1 deletion(-)