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| 1 | +--- |
| 2 | +title: "Cloud Hypervisor v36.0 Released!" |
| 3 | +date: 2023-11-02T16:06:15Z |
| 4 | +draft: false |
| 5 | +contributors: [Cloud Hypervisor Team] |
| 6 | +--- |
| 7 | +This release has been tracked in our [roadmap project](https://github.com/orgs/cloud-hypervisor/projects/6) as iteration |
| 8 | +v36.0. The following user visible changes have been made: |
| 9 | + |
| 10 | +### Command Line Changes |
| 11 | + |
| 12 | +We switched back to use the `clap` crate to create our command line, |
| 13 | +since the `argh` crate is barely maintained. There were several syntax |
| 14 | +changes: |
| 15 | + |
| 16 | +* All `--option value` commands now are `--option=value`. |
| 17 | +* The `--disk DISK1 --disk DISK2` command now is `--disk DISK1 DISK2`. |
| 18 | +* The `-v -v -v`command now is `-vvv`. |
| 19 | + |
| 20 | +Note: the released binary size increased around 0.3M due to this change. |
| 21 | + |
| 22 | +### Enabled Features Reported via API Endpoint and CLI |
| 23 | + |
| 24 | +Now the enabled (Cargo) features of the running Cloud Hypervisor |
| 25 | +instance can be queried via API endpoint (`/vmm.ping`) and CLI |
| 26 | +(`--version -v`). |
| 27 | + |
| 28 | +### NUMA Support for PCI segments |
| 29 | + |
| 30 | +The `--numa` command is augmented with a new option `pci_segment=`, so |
| 31 | +that users can define the relationship between PCI segments and NUMA |
| 32 | +nodes. Examples can be found from the [memory documentation](docs/memory.md) |
| 33 | + |
| 34 | +### CPU Topology Support on AMD Platforms |
| 35 | + |
| 36 | +Now the CPU topology on x86_64 platforms supports multiple vendors. |
| 37 | + |
| 38 | +### Unix Socket Backend for Serial Port |
| 39 | + |
| 40 | +The `--serial` command is augmented with a new option `socket=`, allowing |
| 41 | +users to access the serial port using a Unix socket. |
| 42 | + |
| 43 | +### AIO Backend for Block Devices |
| 44 | + |
| 45 | +An AIO backend is added for `virtio-block` devices to improve block |
| 46 | +device performance when the `io_uring` feature is not supported by the |
| 47 | +host Operating System. |
| 48 | + |
| 49 | +### Documentation Improvements |
| 50 | + |
| 51 | +* New [documentation](docs/coverage.md) for collecting coverage data |
| 52 | +* Various typo fixes |
| 53 | + |
| 54 | +### Notable Bug Fixes |
| 55 | + |
| 56 | +* Fix a deadlock when TDX is enabled (#5845) |
| 57 | +* Only advertise AMX feature bits to guest when the AMX cpu feature is |
| 58 | + enabled (#5834) |
| 59 | +* Correct default value for vCPU topology on AArch64 (#5893) |
| 60 | + |
| 61 | +### Contributors |
| 62 | + |
| 63 | +Many thanks to everyone who has contributed to our release: |
| 64 | + |
| 65 | +* Anatol Belski <[email protected]> |
| 66 | + |
| 67 | +* Dario Nieuwenhuis <[email protected]> |
| 68 | + |
| 69 | + |
| 70 | +* Muminul Islam <[email protected]> |
| 71 | +* Praveen K Paladugu <[email protected]> |
| 72 | +* Ravi kumar Veeramally < [email protected]> |
| 73 | +* Rob Bradford <[email protected]> |
| 74 | +* Thomas Barrett <[email protected]> |
| 75 | + |
| 76 | + |
| 77 | + |
| 78 | +### Download |
| 79 | + See the <a href="https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v36.0">GitHub Release</a> for the release assets. |
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