v39.0 This release has been tracked in our [roadmap project](https://github.com/orgs/cloud-hypervisor/projects/6) as iteration v39.0. The following user visible changes have been made: Variable Sizing of PCI Apertures for Segments -------- ------ -- --- --------- --- -------- It is now possible to use `--pci-segment` to adjust the aperture size that devices 32-bit and 64-bit PCI device BARs will be allocated from. Previously the address space was equally distributed across all the segments which may leave insufficient space for devices that require a large 32-bit space. With this change the weighting per segment can be adjusted. (#6387) Direct Booting with bzImages ------ ------- ---- -------- Support for directly booting Linux from bzImages has been added.(#6200) Support for NVIDIA GPUDirect P2P Support ------- --- ------ --------- --- ------- The `x_nv_gpudirect_clique` option was added to `--device` to allow the configuration of device P2P support with NVIDIA GPUs. (#6235) Guest NMI Injection Support ----- --- --------- ------- A new API endpoint and `ch-remote` option added for injecting an NMI into the guest. (#6047) Notable Bug Fixes ------- --- ----- * Workaround for kernel bug affecting guest IRQ masking on AMD (#6353) * Correctly cleanup `sigwinch_listener` process (#6208) * Graceful shutdown of HTTP API thread (#6248, #6247) * Fix `queue_affinity` option in OpenAPI metadata (#6268) * Fix documentation to indicate only stream mode is supported by `virtio-vsock` (#6306) * Fix `virtio-fs` tag validation (#6358, #6359) * Add missing `pvpanic` device to OpenAPI metadata (#6372) * Fixes for nested virtualization with VFIO devices (#6110, #6298, #6297, #6319) * Fix for backing file for `virtio-mem` regions with snapshot/restore (#6337, #6338) * Explicitly mark FDs used for network devices as invalid across snapshot/restore (#6332, #6286) * Improve `event-monitor` events around reboot (#6277, #6274) * Fix potential deadlock around paused devices during live migration (#6293) * Fix panic when running `ch-remote` with no subcommand (#6230) * Fix hotplug of `virtio` devices after snapshot/restore and live migration (#6326, #6265) Contributors ------------ Many thanks to everyone who has contributed to our release: * Alexandru Matei <alexandru.matei@uipath.com> * Andrew Carp <acarp@crusoeenergy.com> * Bo Chen <chen.bo@intel.com> * Bouke van der Bijl <i@bou.ke> * Chris Webb <chris@arachsys.com> * Jinank Jain <jinankjain@microsoft.com> * Lucas Jacques <contact@lucasjacques.com> * Muminul Islam <muislam@microsoft.com> * Nuno Das Neves <nudasnev@microsoft.com> * Ravi kumar Veeramally <ravikumar.veeramally@intel.com> * Rob Bradford <rbradford@rivosinc.com> * Ruslan Mstoi <ruslan.mstoi@intel.com> * Stefan Nuernberger <stefan.nuernberger@cyberus-technology.de> * Thomas Barrett <tbarrett@crusoeenergy.com> * Wei Liu <liuwe@microsoft.com> * Yi Wang <foxywang@tencent.com>