Re: [RFC PATCH 12/42] iommufd: Introduce allocation data info and flag for KVM managed HWPT

[Jason Gunthorpe]

On Sat, Dec 02, 2023 at 05:21:13PM +0800, Yan Zhao wrote:

> @@ -413,11 +422,13 @@ struct iommu_hwpt_arm_smmuv3 {
>   * @IOMMU_HWPT_DATA_NONE: no data
>   * @IOMMU_HWPT_DATA_VTD_S1: Intel VT-d stage-1 page table
>   * @IOMMU_HWPT_DATA_ARM_SMMUV3: ARM SMMUv3 Context Descriptor Table
> + * @IOMMU_HWPT_DATA_KVM: KVM managed stage-2 page table
>   */
>  enum iommu_hwpt_data_type {
>  	IOMMU_HWPT_DATA_NONE,
>  	IOMMU_HWPT_DATA_VTD_S1,
>  	IOMMU_HWPT_DATA_ARM_SMMUV3,
> +	IOMMU_HWPT_DATA_KVM,
>  };

Definately no, the HWPT_DATA is for the *driver* - it should not be
"kvm".

Add the kvm fd to the main structure

Jason