On Wed, Feb 12, 2025 at 04:34:18PM -0500, Matthew Rosato wrote: > Enabled via the kernel command-line 'iommu.passthrough=1' option. > > Introduce the concept of identity domains to s390-iommu, which relies on > the bus_dma_region to offset identity mappings to the start of the DMA > aperture advertized by CLP. > > Tested-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx> > Reviewed-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx> > Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx> > --- > drivers/iommu/s390-iommu.c | 95 +++++++++++++++++++++++++++++--------- > 1 file changed, 72 insertions(+), 23 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> This may want to be changed to use https://lore.kernel.org/linux-iommu/2-v1-91eed9c8014a+53a37-iommu_virtio_domains_jgg@xxxxxxxxxx/ Later on Jason
