On 5/30/21 11:06 AM, Tianyu Lan wrote: > @@ -91,6 +92,6 @@ int pci_xen_swiotlb_init_late(void) > EXPORT_SYMBOL_GPL(pci_xen_swiotlb_init_late); > > IOMMU_INIT_FINISH(2, > - NULL, > + hyperv_swiotlb_detect, > pci_xen_swiotlb_init, > NULL); Could you explain this change? -boris