On Wed, Oct 30, 2019 at 07:13:59PM +0100, Christoph Hellwig wrote:
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?
Aha, it's this again. Didn't catch your meaning at first. Point taken.
--
Reza Arbab
