On 2017年03月16日 09:42, Lan Tianyu wrote:
Also I presume that this vIOMMU use case is not the only case where a
driver would want to be notified of IOMMU faults, in-kernel drivers
might want this too. Drivers making use of the DMA API don't really
have any visibility to the IOMMU domain in use, so the framework we use
to connect drivers with the IOMMU faults probably needs to abstract
that.
Yes, device page request(part of SVM support) on native also requires
that device driver to receive IOMMU fault event(page request event) from
IOMMU driver. So it's necessary to add such abstract layer between IOMMU
driver and device driver(include VFIO-PCI driver).
Hi:
Do you have a real case that requires PRS for kernel drivers?
Thanks
