On Wed, Oct 30, 2019 at 01:08:51PM -0500, Reza Arbab wrote: > On Wed, Oct 30, 2019 at 06:53:41PM +0100, Christoph Hellwig wrote: >> How do you even use this code? Nothing in the kernel even calls >> dma_set_mask for NPU devices, as we only suport vfio pass through. > > You use it by calling dma_set_mask() for the *GPU* device. The purpose of > pnv_npu_try_dma_set_bypass() is to then propagate the same bypass > configuration to all the NPU devices associated with that GPU.
Which in-kernel driver, which PCI ID?
