RE: [RFC 5/7] iommufd/selftest: Extend IOMMU_TEST_OP_MOCK_DOMAIN to pass in pasid

[Tian, Kevin]

> From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
> Sent: Monday, October 9, 2023 4:51 PM
> 
> This extends IOMMU_TEST_OP_MOCK_DOMAIN to accept a pasid from caller.
> Hence it is able to cover the iommufd_device_bind_pasid() for SIOV
> virtual devices. pasid #0 is selected to mark the physical devices,
> non-zero pasid values would be considered as SIOV virtual device bind.
> Will add SIOV test cases later.
> 
...
> @@ -62,6 +62,8 @@ struct iommu_test_cmd {
>  			__aligned_u64 length;
>  		} add_reserved;
>  		struct {
> +			/* #0 is invalid, any non-zero is meaningful */
> +			__u32 default_pasid;

#0 represents the physical device instead of being invalid.