On Thu, Mar 22, 2018 at 08:12:03PM -0700, Jacob Pan wrote: > DMA faults can be detected by IOMMU at device level. Adding a pointer > to struct device allows IOMMU subsystem to report relevant faults > back to the device driver for further handling. > For direct assigned device (or user space drivers), guest OS holds > responsibility to handle and respond per device IOMMU fault. > Therefore we need fault reporting mechanism to propagate faults beyond > IOMMU subsystem. > > There are two other IOMMU data pointers under struct device today, here > we introduce iommu_param as a parent pointer such that all device IOMMU > data can be consolidated here. The idea was suggested here by Greg KH > and Joerg. The name iommu_param is chosen here since iommu_data has been used. > > Suggested-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> > Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com> > Signed-off-by: Jean-Philippe Brucker <jean-philippe.bruc...@arm.com> > Link: https://lkml.org/lkml/2017/10/6/81
Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
