v0.4.0

0.4.0 (2018-09-14)

This release is a major restructuring and renaming of Solo5 components, primarily to reflect that the "ukvm monitor" is no longer specific to the KVM hypervisor and to allow for future development of further targets and tenders enabling different sandboxing technologies.

Major changes:

• kernel/X: Moved to bindings/X, now referred to as the "Solo5 bindings for X". Build products are now named bindings/X/solo5_X.o.
  • kernel/solo5.h: Moved to include/solo5/solo5.h.
• ukvm: Target has been renamed to hvt. Monitor code is now referred to as the hvt tender and has been moved to tenders/hvt/.
  • ukvm-configure: Now named solo5-hvt-configure.
  • ukvm-bin: Now named solo5-hvt.
  • ukvm/ukvm_guest.h: Renamed to include/solo5/hvt_abi.h.
• Generated VM names used on FreeBSD and OpenBSD have been changed from ukvm%d to solo5-%d, with %d being the PID of the solo5-hvt tender.
• Core file names produced by the hvt dumpcore module have been changed from core.ukvm.%d to core.solo5-hvt.%d.
• solo5-run-virtio and solo5-mkimage: Renamed to solo5-virtio-run and solo5-virtio-mkimage respectively.
• OPAM packages used by MirageOS have been renamed from solo5-kernel-X to solo5-bindings-X, accounting for the change from ukvm to hvt. Full details of the impact of this change on existing Mirage/Solo5 installations will be provided separately as part of a MirageOS release.

For further details please refer to the discussion and commits merged as part of #274.

Other changes:

• Update OpenBSD requirements to 6.4 and minor OpenBSD build fixes (#270, #273).

v0.3.1

0.3.1 (2018-08-10)

Minor point release with build fixes:

• Fix array-bounds compilation error with newer compilers (#266, #267).
• Synchronise with OpenBSD vmmvar.h changes (#268).

Thanks to the following new contributors to this release:

• Rolf Sommerhalder
• Sven Anderson

v0.3.0

0.3.0 (2018-06-15)

a.k.a. the "longest-overdue release in the history of the project", hopefully to stay that way.

The biggest user-visible changes by far are the porting of ukvm to run on FreeBSD and OpenBSD vmm, and the addition of support for the Muen Separation Kernel as a host system. Oh, and support for ARM64 as a host architecture.

Major changes:

• Internal re-design and refactoring to enable support for multi-{arch, host system} (#171, #192).
• ukvm: FreeBSD vmm support (#171).
• ukvm: OpenBSD vmm support (#226).
• Support for Muen Separation Kernel as a host system (#190).
• aarch64 support (#209).
• Much improved support for GDB server in ukvm (#198).
• ukvm: Support for post-mortem debugging (guest core dumps) (#258).
• ukvm: Support for setting guest memory size with --mem (#211).
• Public (unikernel-facing) API refresh, documentation and cleanups (#244, #245).
• Self-tests reworked using "bats" framework (#246).

Acknowledgements:

Thanks to the following new contributors to this release:

• Adam Steen
• Nikhil AP
• Wei Chen

v0.2.2

0.2.2 (2017-04-04)

This release incorporates fixes since the release of MirageOS 3.0.

The changes in #166 may have a security impact, all users are encouraged to rebuild their deployed unikernels against this release.

Notable changes:

• Add self-test for guest exception handling (#162).
• Setup FPU in ukvm and add self-test for FPU/SSE operation (#163).
• Fix check for KVM 32-bit gap (#165).
• Replace kernel/lib.c with musl-derived implementations (#166).
• solo5-virtio-run.sh support for Arch Linux (#168, #169).

Acknowledgements:

Thanks to the following new contributors to this release:

• Adrian-Ken Rueegsegger
• Michael LeMay
• Gabriel Jaldon

v0.2.1

0.2.1 (2017-02-21)

Point release to address a compilation issue on systems with Clang 3.9 (#158)
and correct license headers for some source files (#159).

v0.2.0

0.2.0 (2017-01-26)

This release is targeted for use with MirageOS 3.0.

High-level user-visible changes in this release:

• Support for building the virtio backend on FreeBSD.
• The virtio drivers are now stable and tested on QEMU/KVM, FreeBSD/bhyve and
  Google Compute Engine.
• A new option (--net-mac) for specifying a user-defined MAC address to ukvm.
• A new script solo5-mkimage.sh for building
  MBR-partitioned disk images with a bootloader and Solo5 (virtio backed)
  unikernel, with integrated support for building images for Google Compute
  Engine.
• A new script solo5-run-virtio for launching
  Solo5 (virtio backed) unikernels on QEMU/KVM and FreeBSD/bhyve.
• Improvements to the standalone test programs under tests/, including an
  automated test suite.
• Standardised license headers and copyright notices across the codebase and
  introduced an AUTHORS file listing contributors and their affiliations.

Notable changes under the hood:

• Security audit of the ukvm "hypercall" interfaces and ELF loader.
• Cleanup and refactoring of the low-level interrupt and trap handling code.
• Memory layout improvements and unification between the ukvm and virtio
  backends.
• Many bug fixes.

Acknowledgements:

The following people helped by filing valuable issues, testing and other
non-code contributions to this release:

• David Kaloper
• Hannes Mehnert
• Sean Grove

Thank you!