v48.0 This release has been tracked in [v48.0 group](https://github.com/orgs/cloud-hypervisor/projects/6/views/4?filterQuery=release%3A%22Release+48%22) of our [roadmap project](https://github.com/orgs/cloud-hypervisor/projects/6/). Experimental `fw_cfg` Device Support ------------------------------------ This feature enables passing configuration data and files, such as VM boot configurations (kernel, kernel cmdline, e820 memory map, and ACPI tables), from the host to the guest. (#7117) Experimental `ivshmem` Device Support ------------------------------------- Support for inter-VM shared memory has been added. For more information, please refer to the [ivshmem documentation](docs/ivshmem.md). (#6703) Firmware Boot Support on `riscv64` --------------------------------- In addition to direct kernel boot, firmware boot support has been added on `riscv64` hosts. (#7249) Increased vCPU Limit on x86_64/kvm ---------------------------------- The maximum number of supported vCPUs on x86_64 hosts using KVM has been raised from 254 to 8192. (#7299) Improved Block Performance with Small Block Sizes ------------------------------------------------- Performance for `virtio-blk` with small block sizes (16KB and below) is enhanced via submitting async IO requests in batches. (#7146) Faster VM Pause Operation ------------------------- The VM pause operation now is significantly faster particularly for VMs with a large number of vCPUs. (#7290) Updated Documentation on Windows Guest Support ---------------------------------------------- Our Windows documentation now includes instructions to run Windows 11 guests, in addition to Windows Server guests. (#7218) Policy on AI Generated Code --------------------------- We will decline any contributions known to contain contents generated or derived from using Large Language Models (LLMs). Details can be found in our [contributing documentation](CONTRIBUTING.md). (#7162) Removed SGX Support ------------------- The SGX support has been removed, as announced in the deprecation notice two release cycles ago. (#7093) Notable Bug Fixes ----------------- * Seccomp filter fixes with glibc v2.42 (#7327) * Various fixes related to (#7331, #7334, #7335)