> From: Kirti Wankhede > Sent: Wednesday, October 17, 2018 2:13 AM > > Add migration support for VFIO device > > This Patch set include patches as below: > - Define KABI for VFIO device for migration support. > - Generic migration functionality for VFIO device. > * This patch set adds functionality only for PCI devices, but can be > extended to other VFIO devices. > * Added all the basic functions required for pre-copy, stop-and-copy and > resume phases of migration. > * Added state change notifier and from that notifier function, VFIO > device's state changed is conveyed to VFIO vendor driver. > * During save setup phase and resume/load setup phase, migration region > is queried from vendor driver and is mmaped by QEMU. This region is > used to read/write data from and to vendor driver. > * .save_live_pending, .save_live_iterate and .is_active_iterate are > implemented to use QEMU's functionality of iteration during pre-copy > phase. > * In .save_live_complete_precopy, that is in stop-and-copy phase, > iteration to read data from vendor driver is implemented till pending > bytes returned by vendor driver are not zero. > * .save_cleanup and .load_cleanup are implemented to unmap migration > region that was setup duing setup phase. > * Added function to get dirty pages bitmap from vendor driver. > - Add vfio_listerner_log_sync to mark dirty pages. > - Make VFIO PCI device migration capable. > I didn't see a kernel part change implementing the new KABI. If there is, can you point out? btw how is this work related to previous effort on adding live migration to VFIO? https://lists.gnu.org/archive/html/qemu-devel/2018-04/msg01134.html https://www.spinics.net/linux/fedora/libvir/msg170669.html Thanks Kevin
