On Fri, Mar 13, 2026 at 08:39:18AM -0700, Jacob Pan wrote: > Hi David, > > > +config VFIO_PCI_LIVEUPDATE > > + bool "VFIO PCI support for Live Update (EXPERIMENTAL)" > > + depends on LIVEUPDATE && VFIO_PCI > > + help > > + Support for preserving devices bound to vfio-pci across a > > Live > > + Update. The eventual goal is that preserved devices can run > > + uninterrupted during a Live Update, including DMA to > > preserved > > + memory buffers and P2P. However there are many steps still > > needed to > > + achieve this, including: > > + > > + - Preservation of iommufd files > > + - Preservation of IOMMU driver state > In the interim, what do you think about moving forward with noiommu > mode without preserving IOMMU driver state? I’ve tested your > vfio_pci_liveupdate_kexec_test with the noiommu cdev, and it works as > expected. >
Just curious, are you using qemu VM without iommu device for noiommu work or do you have actual system without iommu hardware for testing?
