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65 lines
2.5 KiB
Markdown
65 lines
2.5 KiB
Markdown
# v0.1.0
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This release has been tracked through the [0.1.0 project](https://github.com/intel/cloud-hypervisor/projects/1).
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Highlights for `cloud-hypervisor` version 0.1.0 include:
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### Shared filesystem
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We added support for the [virtio-fs](https://virtio-fs.gitlab.io/) shared file
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system, allowing for an efficient and reliable way of sharing a filesystem
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between the host and the `cloud-hypervisor` guest.
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See our [filesystem sharing](https://github.com/intel/cloud-hypervisor/blob/master/docs/fs.md)
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documentation for more details on how to use virtio-fs with `cloud-hypervisor`.
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### Initial direct device assignment support
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VFIO (Virtual Function I/O) is a kernel framework that exposes direct device
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access to userspace. `cloud-hypervisor` uses VFIO to directly assign host
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physical devices into its guest.
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See our [VFIO](https://github.com/intel/cloud-hypervisor/blob/master/docs/vfio.md)
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documentation for more detail on how to directly assign host devices to
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`cloud-hypervisor` guests.
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### Userspace IOAPIC
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`cloud-hypervisor` supports a so-called split IRQ chip implementation by
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implementing support for the [IOAPIC](https://wiki.osdev.org/IOAPIC).
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By moving part of the IRQ chip implementation from kernel space to user space,
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the IRQ chip emulation does not always run in a fully privileged mode.
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### Virtual persistent memory
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The `virtio-pmem` implementation emulates a virtual persistent memory device
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that `cloud-hypervisor` can e.g. boot from. Booting from a `virtio-pmem` device
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allows to bypass the guest page cache and improve the guest memory footprint.
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### Linux kernel bzImage
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The `cloud-hypervisor` linux kernel loader now supports direct kernel boot from
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`bzImage` kernel images, which is usually the format that Linux distributions
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use to ship their kernels. For example, this allows for booting from the host
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distribution kernel image.
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### Console over virtio
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`cloud-hypervisor` now exposes a `virtio-console` device to the guest. Although
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using this device as a guest console can potentially cut some early boot
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messages, it can reduce the guest boot time and provides a complete console
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implementation.
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The `virtio-console` device is enabled by default for the guest console.
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Switching back to the legacy serial port is done by selecting
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`--serial tty --console off` from the command line.
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### Unit testing
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We now run all unit tests from all our crates directly from our CI.
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### Integration tests parallelization
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The CI cycle run time has been significantly reduced by refactoring our
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integration tests; allowing them to all be run in parallel.
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