> From: Tianyu Lan <ltyker...@gmail.com> > Sent: Thursday, May 26, 2022 5:01 AM > ... > @@ -119,6 +124,10 @@ static void netvsc_subchan_work(struct work_struct > *w) > nvdev->max_chn = 1; > nvdev->num_chn = 1; > } > + > + /* Allocate boucne buffer.*/ > + swiotlb_device_allocate(&hdev->device, nvdev->num_chn, > + 10 * IO_TLB_BLOCK_UNIT); > }
Looks like swiotlb_device_allocate() is not called if the netvsc device has only 1 primary channel and no sub-schannel, e.g. in the case of single-vCPU VM? _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
