On 2023/9/27 15:52, Tian, Kevin wrote:
From: Liu, Yi L<yi.l.liu@xxxxxxxxx>
Sent: Tuesday, September 26, 2023 5:27 PM
From: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
This allows the upper layers to set a nested type domain to a PASID of a
device if the PASID feature is supported by the IOMMU hardware.
Signed-off-by: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
Signed-off-by: Yi Liu<yi.l.liu@xxxxxxxxx>
---
drivers/iommu/intel/nested.c | 47
++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
pasid can be attached to either user hwpt or kernel hwpt.
We should also introduce a set_dev_pasid callback for non-nest domain ops.
We already have the code in Linus' tree. The idxd driver uses it for
kernel DMA with pasid.
Best regards,
baolu
