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| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2023-05-24 10:54:10 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-05-25 16:39:58 +0300 |
| commit | 657d42cf5df64d9f32caab73ba2d2284879a37b0 (patch) | |
| tree | dbb9322e2820eabf3d96d4934d40492acb7e125a /kernel | |
| parent | 623a71385312ee288d59e319b90922e6e6943766 (diff) | |
| download | linux-657d42cf5df64d9f32caab73ba2d2284879a37b0.tar.xz | |
s390/ism: Set DMA coherent mask
A future change will convert the DMA API implementation from the
architecture specific arch/s390/pci/pci_dma.c to using the common code
drivers/iommu/dma-iommu.c which the utilizes the same IOMMU hardware
through the s390-iommu driver. Unlike the s390 specific DMA API this
requires devices to correctly set the coherent mask to be allowed to use
IOVAs >2^32 in dma_alloc_coherent(). This was however not done for ISM
devices. ISM requires such addresses since currently the DMA aperture
for PCI devices starts at 2^32 and all calls to dma_alloc_coherent()
would thus fail.
Link: https://lore.kernel.org/all/20230310-dma_iommu-v9-1-65bb8edd2beb@linux.ibm.com/
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20230524075411.3734141-1-schnelle@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions