Re: [PATCH 0/2] iommufd: Only enforce_cache_coherency when allocating hwpt

[Baolu Lu <baolu.lu@linux.intel.com>]

On 2023/10/21 8:37, Nicolin Chen wrote:
> https://lore.kernel.org/linux-iommu/20231020135501.GG3952@nvidia.com/
> The conversation above concluded that a hwpt should only enforce cache
> coherency per device at the stage of its allocation, and it should not
> be changed or updated in the attach/replace routines.
> 
> Add two patches dropping the enforce_cache_coherency calls from attach
> and replce routines respectively, since they were introduced with two
> different commits.
> 
> Nicolin Chen (2):
>    iommufd/device: Drop enforce_cache_coherency in
>      iommufd_device_do_replace
>    iommufd/device: Drop enforce_cache_coherency in
>      iommufd_hw_pagetable_attach
> 
>   drivers/iommu/iommufd/device.c          | 19 ++-----------------
>   drivers/iommu/iommufd/hw_pagetable.c    |  2 +-
>   drivers/iommu/iommufd/iommufd_private.h |  1 -
>   3 files changed, 3 insertions(+), 19 deletions(-)

Hi Kevin and Jason,

With these two fixes, there's no issue in the intel driver any more. Do
I understand it right?

Best regards,
baolu