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.. _skiboot-6.6:
skiboot-6.6
===========
skiboot v6.6 was released on Wednesday April 22nd 2020. It is the first release
of skiboot 6.6 series, which becomes the new stable release following the
:ref:`skiboot-6.5` release, first released August 16th 2019.
There hasn't been a skiboot release in a while and this release doesn't contain
a huge number of new features for users, just a lot of bug fixes, and additional
platform support. The next release should be a little more lively with a number
of internal refactorings and new features on the way.
.. _skiboot-6.6-new-features:
New features
------------
- Skiboot is now dual licensed as Apache 2.0 -OR- GPLv2+
There are some files still licensed Apache 2.0 only due to contributions
that we are unable to change the license of, but they are the minority.
- Skiboot can now be built as little endian, thanks to Team Nick.
Doing so requires building with: make LITTLE_ENDIAN=1
- OpenCAPI reset support
This is to allow FPGA-based OpenCAPI devices to be re-flashed with a new
device image, then reset to activate the new image. Although it is based
on top of the existing PCI Hotplug support it does require some OS changes
to function.
- The :ref:`OPAL_PHB_SET_OPTION` and :ref:`OPAL_PHB_GET_OPTION` OPAL calls
These OPAL calls provide the OS with a means for controlling per-PHB
settings. Currently this allows the OS to enable or disable the the "Global
MMIO EEH Disable" and "4GTE" settings which are available on Power9 / PHB4.
See the PHB specification for more details.
Removed features
----------------
- Fast-reboot is now disabled by default.
Fast-reboot will continue to be supported, but as an opt-in feature rather
than the default. From the commit (ee07f2c68160) message::
This has two user visible changes:
1. Full reboot is now the default. In order to get fast-reboot as the
default the nvram option needs to be set:
nvram -p ibm,skiboot --update-config fast-reset=1
2. The nvram option to force a fast-reboot even when some part of
skiboot has called disable_fast_reboot() has changed from
'fast-reset=im-feeling-lucky' to 'force-fast-reset=1' because
it's impossible to actually use that 'feature' if fast-reboot is
off by default.
nvram -p ibm,skiboot --update-config force-fast-reset=1
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