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Leverage ARCH_HAS_DMA_MAP_DIRECT config option for coherent allocations as well. This will bypass DMA ops for memory allocations that have been pre-mapped. Always set device bus_dma_limit when memory is pre-mapped. In some architectures, like PowerPC, pmemory can be converted to regular memory via daxctl command. This will gate the coherent allocations to pre-mapped RAM only, by dma_coherent_ok(). Signed-off-by: Gaurav Batra <gbatra@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20251107161105.85999-1-gbatra@linux.ibm.com |
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