Re: [PATCH v4 05/13] iommu/vt-d: Prepare intel_iommu_set_dev_pasid() handle replacement

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

On 11/4/24 21:18, Yi Liu wrote:
> To handle domain replacement, the intel_iommu_set_dev_pasid() needs to
> keep the old configuration and the prepare for the new setup. This requires
> a bit refactoring to prepare for it.

Above description is a bit hard to understand, are you saying

... the intel_iommu_set_dev_pasid() needs to roll back to the old
configuration in the failure path, therefore refactor it to prepare for
the subsequent patches ...

?

> 
> domain_add_dev_pasid() and domain_remove_dev_pasid() are added to add/remove
> the dev_pasid_info which represents the association of the pasid/device and
> domain. Till now, it's still not ready for replacement yet.
> 
> Signed-off-by: Yi Liu<yi.l.liu@intel.com>
> ---
>   drivers/iommu/intel/iommu.c | 90 +++++++++++++++++++++++++------------
>   1 file changed, 61 insertions(+), 29 deletions(-)

The change itself looks good to me,

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>