> On Tue, Jul 02, 2019 at 06:53:58PM -0700, Sai Praneeth Prakhya wrote: > > Assume a use case where-in the priviliged user would want to use the > > device in pass-through mode when the device is used for host but would > > want to switch to dma protected mode when switching for VFIO in user > > space. Presently, this is not supported and hence add support to change > default domain of a group dynamically. > > VFIO does it's own iommu magic with the device and moves the group out of the > default domain, so that doesn't sound like a valid use-case.
Thanks a lot! for the reply Joerg. I wasn't aware about this as I have very limited exposure to VFIO. I will take a look into this. > More valid would be something like putting a device into passthrough > mode to improve performance, or do you have other valid use-cases in mind? Presently, we don't have anything else except that putting a device in pass through mode will improve its performance. Regards, Sai _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
