Hi Eric,

On 2021/2/24 5:06, Eric Auger wrote:
+/*
+ * VFIO_IOMMU_SET_PASID_TABLE - _IOWR(VFIO_TYPE, VFIO_BASE + 18,
+ *                     struct vfio_iommu_type1_set_pasid_table)
+ *
+ * The SET operation passes a PASID table to the host while the
+ * UNSET operation detaches the one currently programmed. Setting
+ * a table while another is already programmed replaces the old table.

It looks to me that this description doesn't match the IOMMU part.

[v14,05/13] iommu/smmuv3: Implement attach/detach_pasid_table

|       case IOMMU_PASID_CONFIG_TRANSLATE:
|               /* we do not support S1 <-> S1 transitions */
|               if (smmu_domain->s1_cfg.set)
|                       goto out;

Maybe I've misread something?


Thanks,
Zenghui
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