Re: [PATCH 2/6] s390: enable ARCH_HAS_PHYS_TO_DMA

Matthew Rosato
2024-12-10T21:23:38Z

On 12/9/24 11:33 PM, Christoph Hellwig wrote:
> 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.
>

OK, thanks for the pointer. I think I've got it converted, will test some more and include this change in next version.