Hi Christoph, On 11/21/22 14:16, Christoph Hellwig wrote:
currently parisc has it's own implementation of the dma-coherent allocator that sets up PTEs with the uncached bit. I can't see any reason why using vmap to do the same kind of setup shouldn't work. This small series shows how that could work, but due to a lack of actual parisc hardware it is compile tested only and not only needs a careful review but also actual testing on hardware.
Very interesting! I'll give it a spin on real hardware and will come back with the results... Thanks! Helge
Diffstat: arch/parisc/Kconfig | 4 arch/parisc/include/asm/pgtable.h | 1 arch/parisc/kernel/pci-dma.c | 446 +------------------------------------- include/linux/dma-map-ops.h | 1 kernel/dma/Kconfig | 3 kernel/dma/direct.c | 4 6 files changed, 24 insertions(+), 435 deletions(-)
