On Mon, Dec 09, 2024 at 02:23:59PM -0500, Matthew Rosato wrote: > PCI devices on s390 have a DMA offset that is reported via CLP. In > preparation for allowing identity domains, enable ARCH_HAS_PHYS_TO_DMA > for s390 and get the dma offset for all PCI devices from the reported > CLP value. Nothing new should select ARCH_HAS_PHYS_TO_DMA, please fill out the bus_dma_region attached to the device instead.
