Edward Tomasz Napierała
2018-Dec-25 00:00 UTC
FreeBSD Quarterly Status Report - Third Quarter 2018
FreeBSD Project Quarterly Status Report - 3rd Quarter 2018
With FreeBSD having gone all the way to 12, it is perhaps useful to
take a look back at all the things that have been accomplished, in
terms of many visible changes, as well as all the things that happen
behind the scenes to ensure that FreeBSD continues to offer an
alternative in both design, implementation, and execution.
The things you can look forward to reading about are too numerous to
summarize, but cover just about everything from finalizing releases,
administrative work, optimizations and depessimizations, features added
and fixed, and many areas of improvement that might just surprise you a
little.
Please have a cup of coffee, tea, hot cocoa, or other beverage of
choice, and enjoy this culmulative set of reports covering everything
that's been done since October, 2017.
--Daniel Ebdrup
__________________________________________________________________
FreeBSD Team Reports
* Continuous Integration
* Core Team
* Ports Collection
* Release Engineering Team
* The FreeBSD Foundation
Projects
* 32-bit compatibility and other ABI cleanups
* 4G/4G address space split for i386
* ACPI NVDIMM driver
* Boot Loader
* Building FreeBSD on non-FreeBSD hosts
* Device Mode USB
* ENA FreeBSD Driver Update
* FreeBSD Graphics Team
* FreeBSD/DTrace
* ifuncs
* Intel Work on Core Enabling and Security
* Large scale package building
* LLVM 7.0 - Sanitizers support improvements / Static code analysis
* Performance improvements
* Save/Restore/Migration support in bhyve
* SMAP
* String functions on the amd64 architecture
* Usermode mapping of PCI BARs
Architectures
* Allwinner SoC Support
* Armada 38x FreeBSD support
* ARMv6 and ARMv7 image now use EFI loader
* DTS Update
* FreeBSD on POWER9
* FreeBSD on PowerNV (ppc64)
* FreeBSD on RISC-V
* PINE64-LTS Image
* PocketBeagle Support
* RPI Firmware/DTB/U-Boot Update
Ports
* KDE on FreeBSD
* Puppet
* scarab: CLI tool for Bugzilla-related workflows
Documentation
* Cleaning up the Wiki
* Quarterly Reports
Third-Party Projects
* HardenedBSD 2018Q3 Update
__________________________________________________________________
FreeBSD Team Reports
Entries from the various official and semi-official teams, as found in
the Administration Page.
Continuous Integration
Links
FreeBSD Jenkins Instance
URL: https://ci.FreeBSD.org
FreeBSD CI artifact archive
URL: https://artifact.ci.FreeBSD.org/
FreeBSD Jenkins wiki
URL: https://wiki.FreeBSD.org/Jenkins
freebsd-testing Mailing List
URL: https://lists.FreeBSD.org/mailman/listinfo/freebsd-testing
freebsd-ci Repository
URL: https://github.com/freebsd/freebsd-ci
Contact: Jenkins Admin <jenkins-admin at FreeBSD.org>
Contact: Li-Wen Hsu <lwhsu at FreeBSD.org>
The FreeBSD CI team maintains continuous integration tasks for FreeBSD.
The CI system regularly checks the changes committed to the project's
Subversion repository can be successfully built, and performs various
tests and analysis with the build results. The CI team also maintains
the archive of the artifact built by the CI system, for the further
testing and debugging needs.
Starting from June 2018, the project is sponsored by the FreeBSD
Foundation in hardware and staff. For more details of the sponsored
projects, please refer to:
https://www.freebsdfoundation.org/news-and-events/newsletter/freebsd-fo
undation-update-september-2018/
In addition to that, we also helped checking regressions for OpenSSL
1.1.1 update and test continuously for 12-STABLE branch.
We had meetings and working groups at two developer summits during
2018Q3:
* BSDCam 2018
* EuroBSDCon 2018
Work in progress:
* Fixing the failing test cases and builds
* DTrace test
* ZFS test
* GCC build
* Adding drm ports building test against -CURRENT
* Adding tests for selected project branches, e.g.: clang700-import
* Adding new hardware to the embedded testbed
* Implementing automatic tests on bare metal hardware
* Planning running ztest and network stack tests
__________________________________________________________________
Core Team
Contact: FreeBSD Core Team <core at FreeBSD.org>
Much of Core's focus for the past months has been on three items:
1. Coordination between different groups to support the upcoming 12.0
release. The timing of the OpenSSL 1.1.1 release posed challenges, the
new OpenSSL version included API changes, many components of the base
system and ports required changes. Staying with the older OpenSSL in
12.0 was not a feasible option, because it would have meant backporting
many changes to a version of OpenSSL that would be unmaintained by the
upstream source.
2. Discussions with the release engineering team and Scott Long about
updating the FreeBSD release process. Topics for exploration include:
* having more frequent point releases
* changing the support model
* revising and improving the tooling used to manage the tree and
releases
* additional topics as they are discovered
3. Gathering information to make decisions more data-driven. For
example, we are planning developer and user surveys. If there are
questions that you think should be added to the survey, please discuss
them on freebsd-arch at . We are exploring ways for automated user-driven
hardware usage data to understand the changing ways our software is
used and to target better hardware support.
Here are other noteworthy events (in chronological order) since the
last quarterly report.
2017 Q4
* Sean Eric Fagan's (sef@) commit bit was reactivated with a period
of re-mentoring under Alexander Motin (mav@).
* The MIPS architecture was promoted to tier 2 status.
* Core approved changes to the Code of Conduct.
* All fortune data files, except freebsd-tips, were removed in
r325828.
* Core approved the adoption of a policy requiring any license
exceptions to be recorded alongside code.
* Gordon Tetlow (gordon@) became the new security officer.
* Core approved the use of SPDX tags.
2018 Q1
* Jeb Cramer (jeb@) was awarded a src commit bit under the mentorship
of Sean Bruno (sbruno@) and Eric Joyner (erj@).
* Members of the CoC Review Team were approved. The membership is to
be reviewed once per year.
* A vendor commit bit was awarded to Slava Shwartsman (slavash@) of
Mellanox Technologies under the mentorship of Konstantin Belousov
(kib@) and Hans Petter Selasky (hselasky@).
* Walter Schwarzenfeld was awarded project membership.
* Brad Davis (brd@) was awarded a src commit bit under the mentorship
of Allan Jude (allanjude@) with Baptiste Daroussin (bapt@) as
co-mentor.
* Vincenzo Maffione (vmaffione@) was awarded a src commit bit under
the mentorship of Hiroki Sato (hrs@).
* Ram Kishore Vegesna (ram@) was awarded a src commit bit under the
mentorship of Kenneth D. Merry (ken@) and Alexander Motin (mav@).
2018 Q2
* Tom Jones (thj@) was awarded a src commit bit under the mentorship
of Jonathan T. Looney (jtl@).
* Matt Macy's (mmacy@) commit bit was restored under the mentorship
of Sean Bruno (sbruno@).
* Breno Leitao (leitao@) was awarded a src commit bit under the
mentorship of Justin Hibbits (jhibbits@) with Nathan Whitehorn
(nwhitehorn@) as co-mentor.
* Leandro Lupori (luporl@) was awarded a src commit bit under the
mentorship of Justin Hibbits (jhibbits@) with Nathan Whitehorn
(nwhitehorn@) as co-mentor.
* The handover from the ninth to the tenth elected Core team took
place. The tenth Core members are: Allan Jude (allanjude@),
Benedict Reuschling (bcr@), Brooks Davis (brooks@), Hiroki Sato
(hrs@), Warner Losh (imp@), Jeff Roberson (jeff@), John Baldwin
(jhb@), Kris Moore (kmoore@), and Sean Chittenden (seanc@).
* Joseph Mingrone (jrm@) was appointed the Core secretary under
mentorship of the retiring Core secretary, Matthew Seaman
(matthew@).
* The new team liaisons were decided. portmgr: Sean, doceng: Hiroki,
secteam: Brooks, re: John, clusteradm: Allan, CoC: Warner,
Foundation: Benedict, bugmeister: John, CI: Sean.
* David Maxwell (dwm@) was awarded project membership.
* Daichi Goto's (daichi@) commit bit was reactivated with a period of
re-mentoring under George Neville-Neil (gnn@).
* A vendor commit bit was awarded to Ben Widawsky (bwidawsk@) of
Intel under the mentorship of Ed Maste (emaste@).
2018 Q3
* Core decided to begin meeting twice per month in an attempt to
catch up with many new agenda items.
* Li-Wen Hsu (lwhsu@) was awarded a src commit bit under the
mentorship of Mark Johnston (markj@) with Ed Maste (emaste@) as
co-mentor.
* Samy al Bahra was awarded project membership.
* George Neville-Neil (gnn@) was approved to begin co-mentoring
Vincenzo Maffione (vmaffione@).
__________________________________________________________________
Ports Collection
Links
About FreeBSD Ports
URL: https://www.FreeBSD.org/ports/
Contributing to ports
URL:
https://www.FreeBSD.org/doc/en_US.ISO8859-1/articles/contributing/ports-contributing.html
FreeBSD ports monitoring
URL: http://portsmon.FreeBSD.org/index.html
Ports Management Team
URL: https://www.FreeBSD.org/portmgr/index.html
FreeBSD portmgr (@freebsd_portmgr)
URL: https://twitter.com/freebsd_portmgr/
FreeBSD Ports Management Team (Facebook)
URL: https://www.facebook.com/portmgr
FreeBSD Ports Management Team (Google+)
URL: https://plus.google.com/communities/108335846196454338383
Contact: Ren? Ladan <portmgr-secretary at FreeBSD.org>
During the first quarter of 2018, the number of ports grew to almost
32,000. In 2018Q1, there were 2,100 open PRs with fewer than 600
unassigned. There were 7,900 commits from 169 committers. Compared to
last quarter, the number of commits grew by 18% and the number of PRs
dropped by 25%. Those are some good numbers!
During the 2018Q2 and 2018Q3 quarters, the number of ports grew to just
under 34,000. The number of open PR grew to almost 2,500 with fewer
than 600 of those unassigned. A total of 175 committers made almost
14,200 commits. Compared to the first quarter, the number of commits
dropped by 10% and the number of PRs grew by 19%.
During the last three quarters, portmgr took twelve commit bits in for
safekeeping: daichi@, deichen@, ian@, junovitch@, kevlo@, maho@,
nemysis@, pawel@, rea@, tabthorpe@, vg@, and wxs at .
Portmgr welcomed thirteen new committers in 2018Q2 and 2018Q3:
* Devin Teske (dteske@)
* Eric Turgeon (ericbsd@)
* Fernando Apestegu?a (fernape@)
* Fukang Chen (loader@)
* Gleb Popov (arrowd@)
* Jesper Schmitz Mouridsen (jsm@)
* John Hixson (jhixson@)
* Kevin Bowling (kbowling@)
* Koichiro IWAO (meta@)
* Mateusz Piotrowski (0mp@)
* Matthias Fechner (mfechner@)
* Sergey Kozlov (skozlov@)
The following committers returned after a hiatus:
* Ion-Mihai Tetcu (itetcu@)
* Kevin Lo (kevlo@)
* Sean Chittenden (seanc@)
During the last three quarters, Antoine Brodin (antoine@) ran no fewer
than 113 exp-runs against the ports tree. These runs were executed to
test updates, perform cleanups, and make improvements to the framework
and the base system. Most of the runs were for port upgrades, but
others include LLD progress, changes to the default port versions,
improved support for armv6, armv7, and RISC-V architectures, removed
old base system functionality, new USES, and better matching pkg-plist
with Makefile options (DOCS and EXAMPLES).
Five new USES values were introduced:
* apache: handle dependencies on the Apache web server and modules
* eigen: automatically depend on math/eigen2 or math/eigen3
* emacs: handle dependencies on the Emacs editor and modules.
* gl replaces the old USE_GL from bsd.port.mk
* qt-dist, qt:4 and qt:5 replace the old USE_QT from bsd.qt.mk
The EXTRA_PATCHES functionality has been extended to support
directories, where it will automatically apply all patch-\* files to
the port.
Ports using USES=php:phpize, php:ext, php:zend, and php:pecl have been
flavored and packages are now automatically built for all versions of
PHP that are supported (5.6, 7.0, 7.1 or 7.2).
2018Q3 had updates of major ports: pkg 1.10.5, Chromium 65.0.3325.181,
Firefox 59.0.2, Firefox-ESR 52.7.3, Ruby 2.3.7/2.5.1 and Qt5 5.9.4. The
default version of PHP was changed from 5.6 to 7.1. The former version
of PHP is no longer supported by the developers. The default versions
of Samba and GCC are now respectively 4.7 and 7. The Xorg ports have
been reorganized and there have been changes to net/openntpd. Please
review the UPDATING file for relevant details.
Open tasks:
* The number of commits dropped somewhat over the last three
quarters, leaving more PRs unresolved. If possible, please pick up
some PRs and improve everyone's experience.
__________________________________________________________________
Release Engineering Team
Links
FreeBSD 10.4-RELEASE announcement
URL: https://www.FreeBSD.org/releases/10.4R/announce.html
FreeBSD 11.2-RELEASE announcement
URL: https://www.FreeBSD.org/releases/11.2R/announce.html
FreeBSD 12.0-RELEASE schedule
URL: https://www.FreeBSD.org/releases/12.0R/schedule.html
FreeBSD development snapshots
URL: https://download.FreeBSD.org/ftp/snapshots/ISO-IMAGES/
Contact: FreeBSD Release Engineering Team <re at FreeBSD.org>
The FreeBSD Release Engineering Team responsibilities include:
* setting and publishing release schedules for official project
releases of FreeBSD
* announcing code slushes, freezes, and thaws
* maintaining the respective branches for all supported releases
The FreeBSD Release Engineering Team, led by Marius Strobl, completed
the 10.4-RELEASE in early October 2017. FreeBSD 10.4-RELEASE was the
fifth release from the stable/10 branch, which built on the stability
and reliability of 10.3-RELEASE.
The FreeBSD 11.2-RELEASE cycle started April 20, 2018 with the
announcement of the code slush. The first stage progress was continued
throughout the rest of the quarter with the code freeze, followed by
three BETA builds, three RC builds, and the final release build was
announced June 27, 2018.
The FreeBSD Release Engineering Team started the 12.0-RELEASE cycle
August 10, 2018 with the announcement of the code slush. The code
freeze followed on August 24, 2018. The tentative date for the
stable/12 branch was expected to be September 21, 2018.
Due to unforeseen circumstances with upstream code that was necessary
to include in 12.0-RELEASE, the tentative release schedule needed to be
adjusted several times. The API changes in the updated version of the
upstream code required changes to be made for all base system utilities
that linked with the upstream code. By the end of the 2018Q3 quarter,
the stable/12 branch had not been created due to this delay.
Throughout the remainder of 2018Q3, several development snapshots
builds were released for the head, stable/11, and stable/10 branches.
Much of this work was sponsored by the FreeBSD Foundation.
__________________________________________________________________
The FreeBSD Foundation
Contact: Deb Goodkin <deb at FreeBSDFoundation.org>
The FreeBSD Foundation is a 501(c)(3) non-profit organization dedicated
to supporting and promoting the FreeBSD Project and community
worldwide. Funding comes from individual and corporate donations and is
used to fund and manage software development projects, conferences and
developer summits, and provide travel grants to FreeBSD contributors.
The Foundation purchases and supports hardware to improve and maintain
FreeBSD infrastructure and provides resources to improve security,
quality assurance, and release engineering efforts; publishes marketing
material to promote, educate, and advocate for the FreeBSD Project;
facilitates collaboration between commercial vendors and FreeBSD
developers; and finally, represents the FreeBSD Project in executing
contracts, license agreements, and other legal arrangements that
require a recognized legal entity.
Here are some highlights of what the FreeBSD Foundation did to help
FreeBSD last quarter:
Partnerships and Commercial User Support
As a 501(c)(3) non-profit, we don't directly support commercial users,
but we do work with them to understand their needs and help facilitate
collaboration with the community. Last quarter we met with a few key
FreeBSD users and supporters, to discuss pain points, how they can
contribute back to FreeBSD, and what technologies they would like to
see supported, to support FreeBSD over more of their technologies and
products.
As many of you know, we formed a partnership with Intel around one and
a half years ago. Since then the people we worked directly with left
the company, but it moved us into a new relationship with their Open
Source Technology Center (OTC).
We are very encouraged that Intel has dedicated additional resources
from the OTC to work on FreeBSD in addition to existing resources from
the networking group and other technologies such as QuickAssist. Much
of the work has been focused on security and OS mitigations but we're
also focusing on other areas such as power management and persistent
memory. In May and again in July we traveled to Intel's Hillsboro
campus to meet with management and engineers from OTC and the
networking team. We presented an overview of the project and Foundation
and also discussed key markets and vendors who use FreeBSD in their
products or services and their future requirements.
Intel was also interested in learning more about who contributes to
FreeBSD. Along those lines we've done some work with OTC to create
scripts and organizational mappings to answer that question. Note that
we do need developers to help us update and maintain the organizational
mappings as we understand that developers do tend to move around and
contractors are often working on behalf of multiple organizations.
Fundraising Efforts
Our work is 100% funded by your donations. As of September 30, we
raised $328,482. Our 2018 fundraising goal is $1,250,00 and we are
continuing to work hard to meet and exceed this goal! Please consider
making a donation to help us continue and increase our support for
FreeBSD: https://www.FreeBSDfoundation.org/donate/.
We also have a new Partnership Program, to provide more benefits for
our larger commercial donors. Find out more information at
https://www.FreeBSDfoundation.org/FreeBSD-foundation-partnership-progra
m/ and share with your companies!
OS Improvements
The Foundation improves the FreeBSD operating system by employing
technical staff to maintain and improve critical kernel subsystems, add
features and functionality, and fix problems. This also includes
funding separate project grants like the arm64 port, porting the
blacklistd access control daemon, and the integration of VIMAGE
support, to make sure that FreeBSD remains a viable solution for
research, education, computing, products and more.
We kicked off or continued the following projects last quarter:
* OpenZFS RAID-Z Expansion project
* Headless mode out-of-the-box for embedded ARM boards like the
Beaglebone Black
* Performance and scalability improvements
Having software developers on staff has allowed us to jump in and work
directly on projects to improve FreeBSD such as:
* ZFS improvements
* New Intel server support
* kqueue(2) updates
* 64-bit inode support
* Stack guard
* Kernel Undefined Behavior Sanitizer
* Toolchain projects
* i915 driver investigation
* NVDIMM support in acpiconf(8)
* Continuous integration dashboard (web page and physical hardware)
* FAT filesystem support in makefs(8)
Continuous Integration and Quality Assurance
The Foundation provides a full-time staff member who is working on
improving our automated testing, continuous integration, and overall
quality assurance efforts.
Foundation employee Li-Wen Hsu set up new CI servers to speed up amd64
build and test jobs, to reduce the latency between changes being
committed and results being available. Li-Wen also set up a staging /
development server in order to test changes to the CI system itself
without affecting production results. We have also started a small
hardware test lab, currently connected to the staging server, that
tests the full boot and test cycle on physical hardware. In the near
future additional hardware devices will be added, and this will migrate
to the production CI server.
Release Engineering
The Foundation provides a full-time staff member to lead the release
engineering efforts. This has provided timely and reliable releases
over the last five years.
Foundation employee Glen Barber continued leading the efforts on the
upcoming 12.0-RELEASE. For details surrounding the work involved and
progress thus far on 12.0-RELEASE, please see the FreeBSD Release
Engineering Team section of this quarterly status report.
Supporting FreeBSD Infrastructure
The Foundation provides hardware and support to improve the FreeBSD
infrastructure. Last quarter, we continued supporting FreeBSD hardware
located around the world.
FreeBSD Advocacy and Education
A large part of our efforts are dedicated to advocating for the
Project. This includes promoting work being done by others with
FreeBSD; producing advocacy literature to teach people about FreeBSD
and help make the path to starting using FreeBSD or contributing to the
Project easier; and attending and getting other FreeBSD contributors to
volunteer to run FreeBSD events, staff FreeBSD tables, and give FreeBSD
presentations.
The FreeBSD Foundation sponsors many conferences, events, and summits
around the globe. These events can be BSD-related, open source, or
technology events geared towards underrepresented groups. We support
the FreeBSD-focused events to help provide a venue for sharing
knowledge, to work together on projects, and to facilitate
collaboration between developers and commercial users. This all helps
provide a healthy ecosystem. We support the non-FreeBSD events to
promote and raise awareness of FreeBSD, to increase the use of FreeBSD
in different applications, and to recruit more contributors to the
Project.
Check out some of the advocacy and education work we did last quarter:
* Organized and ran the Essen FreeBSD Hackathon in Essen, Germany
* Participated in the FreeBSD Developer Summit BSDCam, in Cambridge,
England
* Represented FreeBSD at the ARM Partner Meeting
* Presented and taught about FreeBSD at SdNOG 5 in Khartoum, Sudan
* Exhibited and gave a talk at OSCON 2018 in Portland, OR
* Exhibited at the 2018 Grace Hopper Celebration and sponsored as a
Silver Non-Profit Sponsor
* Exhibited at COCON 2018 in Taipei, Taiwan
* Sponsored and gave presentations and tutorials at EuroBSDCon in
Bucharest, Romania
* Organized and ran the Bucharest FreeBSD Developer Summit
* Sponsored the 2018 USENIX Security Symposium in Baltimore, MD as an
Industry Partner
* Provided FreeBSD advocacy material
* Sponsored the 2018 USENIX Annual Technical Conference in Boston, MA
as an Industry Partner
* Sponsored the OpenZFS Developer Summit as a Silver Sponsor
* Presented and taught about FreeBSD at SANOG32 in Dhaka, Bangladesh
* Sponsored the SNIA Storage Developer Conference 2018 as an
Association Partner
* Provided 11 travel grants to FreeBSD contributors to attend many of
the above events.
We continued producing FreeBSD advocacy material to help people promote
FreeBSD around the world.
Read more about our conference adventures in the conference recaps and
trip reports in our monthly newsletters:
https://www.freebsdfoundation.org/news-and-events/newsletter/
We help educate the world about FreeBSD by publishing the
professionally produced FreeBSD Journal. Last quarter we published the
July/August issue that you can find at
https://www.FreeBSDfoundation.org/journal/.
You can find out more about events we attended and upcoming events at
https://www.FreeBSDfoundation.org/news-and-events/.
Legal/FreeBSD IP
The Foundation owns the FreeBSD trademarks, and it is our
responsibility to protect them. We also provide legal support for the
core team to investigate questions that arise.
Go to http://www.FreeBSDfoundation.org to find out how we support
FreeBSD and how we can help you!
__________________________________________________________________
Projects
Projects that span multiple categories, from the kernel and userspace
to the Ports Collection or external projects.
32-bit compatibility and other ABI cleanups
Contact: Brooks Davis <brooks at FreeBSD.org>
As part of maintaining an external ABI (application binary interface)
compatibility layer, I've been improving FreeBSD infrastructure,
primarily the 32-bit compatibility layer. One of FreeBSD's strengths is
that we can easily support many ABIs. This includes support for a.out
format executables (vs the standard ELF), support for i386 on amd64,
the Linux emulation layer, etc.
This infrastructure has existed for decades and not every design
decision has stood the test of time. Support has also been incomplete
in a number of areas (e.g. network management under 32-bit emulation).
Committed improvements include:
* Improved ioctl and sysctl support to allow ifconfig and netstat to
work in 32-bit compat mode.
* Migration from a model of translating ioctl commands and data
structures at the kernel boundary to translating where the commands
are processed. This is a correctness improvement (`ioctl` commands
do not have meaning outside the specific file descriptor in
question) and improves code reusability (my out-of-tree work will
soon include a 64-bit compatibility layer.)
* Simplifications of the generic ELF process execution path by Ed
Maste, John Baldwin, and myself. A number of simplifications
including minor speedups have been committed.
Portions of this work were developed by SRI International and the
University of Cambridge Computer Laboratory (Department of Computer
Science and Technology) under DARPA/AFRL contract FA8750-10-C-0237
("CTSRD"), as part of the DARPA CRASH research programme and under
DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the DARPA
SSITH
research programme.
Work in progress includes cleanups to the APIs used by the kernel when
creating processes and continued ioctl improvements. Work is also
underway to generate the 32-bit system call list from the "default"
list.
The remaining ioctl commands handled in
sys/compat/freebsd32/freebsd32_ioctl.c need to be migrated to the point
of implementation. Help with the latter would be appreciated.
__________________________________________________________________
4G/4G address space split for i386
Contact: Konstantin Belousov <kib at FreeBSD.org>
Most 32-bit FreeBSD architectures, including i386, started to suffer
from the rapid growth of the size of software during the past decade.
When a 32-bit address space is enough space for a given task, 32-bit
mode still has an intrinsic advantage over 64-bit mode, due to less
memory traffic and more economical use of caches. It has grown harder
to provide the self-hosting i386 system build due to the increase in
size of the build tools.
The FreeBSD i386 kernel, prior to the 12.0-RELEASE version, split the
4GB address space of the platform into 3GB (minus 4MB) accessible to
userspace accesses and 1GB for kernel accesses. Neither kernel nor
userspace could access a full 4GB address space. Programs that require
very large virtual address spaces, such as clang when compiling or lld
when linking, could run out of address space: 3GB of address space was
insufficient for their operation. The kernel also had trouble fitting
into the traditional 1GB limitation of address space with the modern
sizing for network buffers, ZFS and other KVA-hungry in-kernel
subsystems.
In FreeBSD 12, the i386 architecture has been changed to provide
dedicated separate address spaces for userspace and kernel, giving each
mode full access to 4GB (minus 8MB) of usable address space. The
userspace on the i386 architecture now has access to the same amount of
address space as the compat32 subsystem in the amd64 architecture
kernel. The increase in kernel address space enables further growth and
maintainability of the i386 architecture.
The split 4GB/4GB user/kernel implementation uses two page directory
entries (PDEs) shared between modes: one for mapping the page table,
another for the mode switching trampoline and other required system
tables. The required system tables, which must always be mapped,
regardless of kernel or user mode, includes such things as the
GDT/IDT/TSS entries. Significant changes were made to the locore code.
The page table creation portion of the code was completely rewritten
from assembly to C, improving readability and maintainability of the
code.
Because the user address space is no longer shared with the kernel, the
copyout(9) functions were rewritten to make a transient mapping of
userspace pages for the duration of any needed accesses. The initial
implementation used the vm_fault_quick_hold_pages() framework, but this
was later optimized by temporarily switching to user mode mappings from
a trampoline, and then using hand-written assembler routines to perform
a faster small block copy operation.
Future plans for the ongoing maintenance of i386 include making the
i386 pmap capable of runtime selection of the PAE or non-PAE page table
format and supporting NX (no execute) mappings for regular i386 kernel.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
ACPI NVDIMM driver
Contact: Konstantin Belousov <kib at FreeBSD.org>
NVDIMM is a technology which provides non-volatile memory with access
characteristics similar to regular DRAM, which is the technology that
implements the normal memory address space of a host. There are ACPI
and UEFI specifications that define platform independent ways to detect
and enumerate the presence of NVDIMMs. These specifications allow the
retrieval of most of the data needed to allow proper application use of
the NVDIMM storage.
A new FreeBSD driver parses the ACPI NFIT table which lists NVDIMMs,
their operational characteristics, and the physical address space where
the NVDIMM memory is accessible. The driver presents each address
region as two devices: One device allows userspace to open(2) a devfs
node, which can be read/written/mapped from the application. This
mapping is zero-copy. The second device is a geom disk(9), which makes
it possible to use NVDIMM for the backing storage for a normal FreeBSD
filesystem, such as UFS, ZFS, or msdosfs. Note that buffer
cache/mapping of files from a traditional filesystem created over
NVDIMM causes an unneeded double-buffering.
Empirically, on typical modern hardware, NVDIMM regions are located far
from the regular DRAM backed memory in the address space, and have
attributes that are not compatible with regular DRAM memory. This makes
it unfeasible to extend the kernel's direct map to provide the kernel
mappings for the NVDIMM regions. A new pmap KPI was designed,
pmap_large_map(9), which allows efficient mapping of very large
physical regions into the KVA. The new code has some optimizations to
the cache flushing operations over the mapped regions, which is needed
to efficiently support bio flushes from a filesystems using the NVDIMM
storage. The NVDIMM driver is the first user of the new KPI, but the
new KPI might also be useful for the NTB driver.
TODO:
* Intel is currently working on extending the driver to support UEFI
namespaces.
* A DAX-capable filesystem is needed, which solves the issue of
double-buffering. Our tmpfs already provides VM facilities which
allows it to avoid double-buffering for mmap, which can be reused
there.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
Boot Loader
Contact: Warner Losh <imp at FreeBSD.org>
Contact: Kyle Evans <kevans at FreeBSD.org>
Contact: Toomas Soome <tsoome at Freebsd.org>
The FreeBSD boot loader lives in src/stand (prior releases had it in
sys/boot and lib/libstand). It covers all the code that the project
provides that interacts with the hardware before the kernel starts.
The LUA interpreter added earlier in 2018 was made default in 2018Q3.
Due to undiagnosed booting issues, the LUA interpreter has been
disabled on sparc64 and all powerpc. The LUA interpreter is scheduled
to replace the FORTH interpreter entirely in FreeBSD 13, although the
FORTH interpreter will remain available as a build option in FreeBSD
12. The plans are not to remove the FORTH loader for about a year after
12.0 release, or approximately January 2020. Platforms not currently
working with the LUA interpreter have until that date to resolve the
issues.
At this point, the LUA scripts implement everything that the FORTH
scripts did. Where there was ambiguity in the spec, or where the FORTH
scripts were more forgiving than was strictly documented, every effort
has been made to improve the documentation and follow the old FORTH
behavior, or document the new behavior where the old behavior was
clearly a bug.
It's anticipated that no further changes to the FORTH loader or the
FORTH scripts will happen. They are quite mature and bullet proof at
this point and it's unlikely that an undiscovered bug will need to be
fixed before retirement.
Other work in progress includes Toomas Soome's port to OpenIndiana. In
addition to porting, he's enhanced the code in a number of ways (both
in the block layer, and UEFI). Many of his improvements have been
committed to FreeBSD, though a few remain and hopefully will be
entering the tree soon after the freeze lifts.
UEFI booting has been greatly enhanced. There are still some machines
that have issues with the default BootXXXX variables or something else
in the environment that are being investigated. We hope to understand
the problems well enough to provide a fix for FreeBSD 12.0.
Ian Lepore has reworked the GELI support so that it is architecture
independent and can be used on any architecture we support.
There are also efforts underway to support booting signed images,
improved crypto booting options, and implement Multiboot 2.0 support.
__________________________________________________________________
Building FreeBSD on non-FreeBSD hosts
Links
Wiki
URL: https://wiki.FreeBSD.org/BuildingOnNonFreeBSD
GitHub project
URL: https://github.com/arichardson/freebsd/tree/crossbuild-aug2018
Contact: Alex Richardson <arichardson at FreeBSD.org>
Currently FreeBSD can only be built on a FreeBSD host. However, most
free CI tools only allow building on Linux or macOS and therefore can
not be used for building the FreeBSD base system. It is sometimes
useful to cross-build FreeBSD for a remote machine or an emulator even
if the build machine is not running FreeBSD. The goal of this project
is to allow building FreeBSD on both Linux and macOS hosts and in the
future it may be extended to allow compiling on a Windows host. This
work originates from the CHERI project and was motivated by multiple
cases of people wanting to try out CheriBSD but not being able to
compile it since they did not have a FreeBSD system available for
compiling. Once completed this project will also allow developers to
contribute to FreeBSD even if they don't have access to a FreeBSD build
system.
The current set of patches for this project can be found on GitHub.
With the current prototype it is possible to compile both world and
kernel for architectures that use the clang compiler and for MIPS64,
which uses gcc. However, some options such as LOCALES are not supported
yet and require further changes before the bootstrap tools can be built
on Linux/macOS.
Some changes required for building on non-FreeBSD have already been
merged to HEAD but there are still a rather large number of changes
that need review.
If you are interested in getting this into HEAD and would like to help,
please try the current prototype and report any issues to
arichardson at FreeBSD.org. If you can help with reviewing the changes
please contact arichardson at FreeBSD.org to be added to any pending
Phabricator reviews.
__________________________________________________________________
Device Mode USB
Links
Handbook chapter
URL:
https://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/usb-device-mode.html
Contact: Edward Tomasz Napierala <trasz at FreeBSD.org>
Many embedded boards include hardware which supports device side USB -
the ability for the board to present itself to another system as a USB
drive, network adapter, or a virtual serial port. The FreeBSD USB stack
has supported this functionality for quite some time, but it has not
been used to its fullest extent.
The goal of this project was to fix that - to document the
functionality, possibly fix some bugs, and to make it easy to use,
automating it as much as possible.
Starting with FreeBSD 12.0, this functionality is enabled out of the
box. This means you can connect your BeagleBone Black's (using its USB
client socket) or a Raspberry Pi 0 (using the On-The-Go (OTG) port) to
your laptop, and you'll get a virtual USB serial port, which serves as
a system console, with getty(8) waiting for you to log in. This means
you no longer need to look for a keyboard and a screen, or mess with
the console cables just to configure your system. You can also switch
it to provide network interface, or present itself as a USB drive -
it's all documented in the FreeBSD Handbook.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
ENA FreeBSD Driver Update
Links
ENA README
URL: https://github.com/amzn/amzn-drivers/blob/master/kernel/fbsd/ena/README
Contact: Michal/ Krawczyk <mk at semihalf.com>
ENA (Elastic Network Adapter) is the smart NIC which is used in the
virtualised environment of Amazon Web Services (AWS). It supports
multiple queues and can handle up to 25 Gb/s, depending on the instance
type on which it is used.
Since last report, ENA versions v0.8.0 and v0.8.1 have been released,
which introduced many bug fixes, new features, optimization, stability
and error recovery improvements. The last is especially important on
the AWS, where the instances have to be reliable as they may be running
very sensitive functions and the down time of the VM should be reduced
to minimum.
The v0.8.0 and v0.8.1 release patches included:
* Upgrade of the HAL to version v1.1.4.3
* Improvement to the reset routine - the driver is now triggering
reset from more fault points and is passing the reset reason to the
device, which can perform the reset adequately to the encountered
error.
* Device statistics (like global Tx and Rx counters) are no longer
read directly from the device. The only exception is Rx drops,
which are still read using the AENQ descriptor.
* The RX Out Of Order completion feature was added, which enabled to
cleanup the RX descriptors out of order by keeping trace of all
free descriptors.
* RX ring is now being monitored, to prevent the ring from stalling.
* Error handling paths were reworked and fixed.
* Driver was covered with branch prediction statements, to make the
most of this CPU feature in the hot paths.
* Fix handling of the DF flag in the IP packets.
* Add dynamic logging and reduce number of messages being printed by
the driver.
* MTU configuration now is being verified using the device
capabilities instead of a constant value.
* Do not pass packet header length hint to the device, because for
the chained mbufs it may be problematic to determine header length,
if the header is split into multiple segments.
This project was sponsored by Amazon.com Inc..
__________________________________________________________________
FreeBSD Graphics Team
Links
Project GitHub page
URL: https://github.com/FreeBSDDesktop
Contact: FreeBSD Graphics Team <x11 at FreeBSD.org>
Contact: Niclas Zeising <zeising at FreeBSD.org>
The FreeBSD X11/Graphics team is responsible for the lower levels of
the FreeBSD graphics stack. This includes graphics drivers, graphics
libraries such as the MESA OpenGL implementation, the X.org xserver
with related libraries and applications, and Wayland with related
libraries and applications.
There have been a lot of changes since the last report. The most
important one is the change of driver distribution and updates. On
FreeBSD 11.2 and later modern graphics drivers using the Linux KPI
subsystem are found in ports. These give much improved support for
Intel and AMD graphics hardware, however, they are currently only
available for amd64.
The legacy drivers available in the FreeBSD base system are also
available in the ports tree, since they cause issues with the new
drivers. They will remain in tree for 11.2 and 12, but work is on-going
to have them removed for 13, except for arm.
The easiest way to install the new drivers is to install
graphics/drm-kmod which will install the correct driver depending on
your architecture and FreeBSD version.
There have been changes to the ports as well. Most notably is the
changed handling of OpenGL dependencies, which has moved to USES
instead of being handled directly in bsd.port.mk. Other big
infrastructure changes is the move from individual \*proto packages to
xorgproto, and turning that into a build time dependency. Many thanks
to portmgr for help with exp-runs for these changes.
There have been updates to applications and libraries as needed.
On the project management side, there is ongoing work to set up a more
efficient way of working, including bi-weekly conference calls to
discuss the current works in progress. Notes from these conference
calls will be posted on the mailing list.
Looking forward, the current major work in progress is to update the
graphics driver to be on par with Linux 4.17. The code is merged, but
patching and bug fixing is ongoing.
There is also work to port the VMware guest graphics driver, vmwgfx, to
FreeBSD and to the Linux KPI, to get better graphics support in VMware.
Lastly, on the driver side is to get the new graphics drivers to work
on i386 as well. Experimental support for this exists in the code
repository, but is not yet merged to the FreeBSD ports tree.
In userland, the biggest things happening is the update of the input
stack, including libinput and supporting libraries.
Work is also ongoing on updating MESA libraries.
On the project management side, the most important tasks is to continue
to work on the team, and how we work internally.
We are also working on setting up a list of requirements for testing,
so that we can be reasonably assured that updates won't cause
regressions.
People who are interested in helping out can find us on the
x11 at FreeBSD.org mailing list, or on our Gitter chat:
https://gitter.im/FreeBSDDesktop/Lobby. We are also available in
#freebsd-xorg on EFNet.
We also have a team area on GitHub where our work repositories can be
found: https://github.com/FreeBSDDesktop
__________________________________________________________________
FreeBSD/DTrace
Contact: George Neville-Neil <gnn at FreeBSD.org>
Contact: Domagoj Stolfa <domagoj.stolfa at cl.cam.ac.uk>
DTrace is a whole-system debugging tool in FreeBSD and is one of the
actively supported projects during the past year.
A research prototype of a distributed version of DTrace and a version
of DTrace that can trace bhyve virtual machines from the host FreeBSD
system are currently under development at the University of Cambridge
as a part of the CADETS project. Recent developments include the
creation of dlog, an in-kernel DTrace consumer which is able to publish
to Kafka, and improvements to early boot and shutdown tracing. On the
virtualisation front, improvements were made in the ability to
dereference and follow pointers inside guests from the host in the
probe context by implementing a nested page table walk inside DTrace
for Intel architectures. The CADETS project has started formalizing
DTrace in HOL4 which enables automated test generation, high assurance
of DTrace implementations in terms of adherence to the specification
and exploration of all allowable behaviors for a given D script.
Currently, the formal model contains most of DIF instructions and a
code generator for them, providing the ability to run DIF programs
specified using the model using FreeBSD's DTrace implementation.
As a result of all of this, a number of changes were upstreamed to the
FreeBSD auditing subsystem and new variables such as jid and jailname
were added to DTrace which can be accessed from D scripts.
OpenDTrace Specification 1.0 has been published which covers the
internal workings of DTrace in general, and its adaptation to various
operating systems in particular. This work was sponsored by AFRL/DARPA
through the CADETS project.
Ruslan Bukin (br@) has added C-compressed ISA extension support to the
RISC-V FBT provider as a part of the ECATS project.
Mark Johnston (markj@) has done some work to fix interactions between
FBT and ifuncs. ifuncs are a toolchain feature which allow programmers
to select a function's implementation at boot-time, rather than at
compile-time. For instance, on amd64, memcpy() is an ifunc and may be
implemented by either memcpy_erms() or memcpy_std(). FBT created probes
for the implementation functions, but we needed some extra support to
ensure that fbt::memcpy:entry continues to work as expected. Similar
work is needed for the PID provider, but is still pending.
Microsoft showed a working demo of DTrace, which was ported from
FreeBSD.
Added to FreeBSD base in 11.2, dwatch is a new DTrace tool, developed
by Devin Teske (dteske@), for automating complex queries for data and
surgically tapping the kernel. In base there are 85 profiles for
interpreting domain-specific data with another 17 available from ports
making a total of over 100 different pipelines from which you can
extract data in multiple formats. dwatch also simplifies observation of
over 100,000 probe points available in FreeBSD, making it easy to find
any process, thread, or jail triggering any probe. On top of all that,
dwatch profiles can leverage higher-level languages such as python,
perl, sh, and many more.
__________________________________________________________________
ifuncs
Contact: Konstantin Belousov <kib at FreeBSD.org>
Contact: Ed Maste <emaste at FreeBSD.org>
Contact: Mark Johnston <markj at FreeBSD.org>
Contact: Mateusz Guzik <mjg at FreeBSD.org>
An ifunc is a special construct in an ELF object, which allows for the
selection of the implementation for the given symbol at runtime, when
the ELF module gets the final relocations applied. The selection of
which code to use is governed by the small piece of user provided code,
attached to the symbol, the so called resolver function. Ifuncs provide
a convenient way to select between different machine-specific
implementations of the parts of the code, without the ugliness and
unsafety of the alternative approach, which is runtime patching.
Ifuncs require support both from the static linker ld(1), and from the
runtime linker for the corresponding execution environment. On FreeBSD,
with the switch from the ancient GPLv2 licensed BFD-based ld(1) to
either in-tree LLD or external modern BFD ld, the use of ifuncs become
possible. Runtime linkers for ifunc support exists for the following
environments:
* i386, amd64, and arm64 kernels
* usermode dynamic linker ld-elf.so.1 on i386 and amd64
* static binaries startup code for i386 and amd64
The use of ifuncs were previously applied for optimization of the
following areas of the amd64 kernel:
* context switching code, instead of huge number of runtime checks
(PTI vs non-PTI, PCID or not, is INVPCID instruction supported for
PCID) now uses set of mode-specific routines, see
pmap_activate_sw(). Besides removing checks at runtime, it also
makes the code much more cleanly structured and readable.
* TLB and cache flush implementation.
* memcpy/memmove, copyin/copyout variants selection for ERMS and
SMAP.
* FPU state save and restore, depending on the support for AVX or
not, this is also used on i386.
For amd64 userspace, we currently use ifunc for optimization of the
architecture dependent TLS base set and get functions.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
Intel Work on Core Enabling and Security
Contact: Ben Widawsky <bwidawsk at FreeBSD.org>
A new team has been formed within Intel to help with side channel
security mitigations as well as core enabling. They are evaluating work
from all areas except networking. The team is currently focusing on two
areas:
1. Power Management improvements
2. NVDIMM namespace support
The ultimate goal of the power management work is to get runtime power
management to hit "opportunistic idle". What this means is when
devices
are idle, the OS will power them down, and when everything goes idle
certain SoCs will allow you to hit very low power states across the
platform. FreeBSD currently doesn't have any notion of runtime power
management, and many devices don't properly implement suspend and
resume. In addition, some preliminary work is in process as it was
thought to help when eventually enabling opportunistic idle. That
preliminary work has been happening and is now up for review:
* https://reviews.FreeBSD.org/D17675
* https://reviews.FreeBSD.org/D17676
NVDIMM namespace support has also been put up for review. ACPI spec
defines namespaces as a way of partitioning the device into separate
labels. The current work will integrate with geom(4). How these are
used is application dependent. This work is up for review as well:
https://reviews.FreeBSD.org/D17619
The team has additionally taken on smaller tasks like porting
turbostat(8), working on git svn init scripts, some small modifications
to acpi tooling, and an effort to create a port PMDK.
__________________________________________________________________
Large scale package building
Contact: Mateusz Guzik <mjg at FreeBSD.org>
Building packages on a 128-thread machine with poudriere exhibits some
bottlenecks.
See the October FreeBSD Foundation Newsletter for a short write-up:
https://www.freebsdfoundation.org/news-and-events/newsletter/freebsd-fo
undation-update-october-2018/
One encountered problem stems from process handling.
The standard process life cycle on UNIX-like systems looks like this:
* a process is created with fork(2)
* it can do regular work or execve(2) a new binary
* it exits, becoming a zombie
* the parent collects the exit code and removes the zombie
There are other variations (e.g. vfork(2) can be used instead of fork).
When you type 'ls' into your shell, it will typically vfork a new
process which will then execve /bin/ls.
All this is guarded with several global kernel locks, but the
granularity can be significantly improved.
A different problem stems from pipes.
Pipes are used all the time, e.g. "du -s | sort -n" creates a pipe
whose one endpoint is standard output for du and another is standard
input for sort.
By default the pipe can hold up to 16KB before it gets filled up.
The kernel dedicates part of its virtual address space to hold pipe
buffers and allocates/deallocates physical pages as pipes get
created/destroyed. This induces TLB invalidation requests to other
CPUs, which causes an unnecessary slowdown.
An easy way out is to cache a certain number of buffers.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
LLVM 7.0 - Sanitizers support improvements / Static code analysis
Links
Release notes
URL: http://releases.llvm.org/7.0.0/docs/ReleaseNotes.html
Contact: David Carlier <devnexen at gmail.com>
In order to increase the FreeBSD tooling to uncover code bugs in the
userland, further compiler-rt components support and static code
analysis improvements had been added since the last 6.0 version.
Starting with the sanitizers, Memory Sanitizer (for amd64) mainly to
detect unitialized pointers. There is also a simple W^X paging requests
detection available from most of sanitizers.
Also libFuzzer support finally had been possible. It allows code to be
tested with random values from corpus inputs. Mutation and combination
algorithms of those random inputs can be overwritten. Can also be used
in addition to ubsan, asan, msan and so on.
At last, the X-Ray instrumentation feature is also supported. It is
mainly about performance profiling purposes for a reasonable
performance runtime cost.
In the static code analysis department, reliable strlcpy (unfortunately
strlcat did not get merged in due time for the release) wrong usage
cases are now covered and W^X code detection tooling had been added.
At the moment, this 7.0 version is imported by Dimitry Andric, within
its own git branch available only for FreeBSD after 12 releases.
__________________________________________________________________
Performance improvements
Contact: Matthew Macy <mmacy at FreeBSD.org>
FreeBSD 12 saw the introduction of a number of performance
improvements:
* The introduction of the new synchronization primitive epoch(9) to
replace the use of reader locks for providing existence guarantees
for data structures.
* epoch(9) was used to provide an 85+% reduction in the overhead of
pcb lookup in high core count systems.
* epoch(9) was used to provide an 85+% reduction in UDP send overhead
on high core count systems. See the link for a bit more detail:
http://scalebsd.org/blog/2018/06/16/UDP-and-epoch-for-liveness-guar
antees
* System call overhead is now half that of FreeBSD 11.
* UNIX sockets now scale near linearly (previously maxed out at 3-4
threads).
* The NUMA work has lead to a 20x-80x improvement in the scalability
of page fault handling.
__________________________________________________________________
Save/Restore/Migration support in bhyve
Links
Github repository for the save/restore and migration features
URL: https://github.com/FreeBSD-UPB/freebsd/tree/projects/bhyve_migration
Github wiki - How to Save and Restore a bhyve guest
URL:
https://github.com/FreeBSD-UPB/freebsd/wiki/Save-and-Restore-a-virtual-machine-using-bhyve
Github wiki - How to Migrate a bhyve guest
URL:
https://github.com/FreeBSD-UPB/freebsd/wiki/Virtual-Machine-Migration-using-bhyve
Github wiki - Suspend/resume test matrix
URL: https://github.com/FreeBSD-UPB/freebsd/wiki/Suspend-Resume-test-matrix
Contact: Elena Mihailescu <elenamihailescu22 at gmail.com>
Contact: Darius Mihai <dariusmihaim at gmail.com>
Contact: Sergiu Weisz <sergiu121 at gmail.com>
Contact: Mihai Carabas <mihai at FreeBSD.org>
The Save/Restore feature is a facility to suspend and resume guest
virtual images that has been added to the FreeBSD/amd64's hypervisor,
bhyve. The bhyvectl tool is used to save the guest virtual machine into
three files:
* a file for the guest memory
* a file for state of each device / CPU state
* a file that has metadata that is used in the restore process
To suspend a bhyve guest, the bhyvectl tool must be run with the
--suspend <state_file_name> option followed by the guest name.
To restore a bhyve guest from a checkpoint, one simply has to add the
-r option followed by the main state file (the same file that was given
to the --suspend option for bhyvectl) when starting the VM.
The Migration feature uses the Save/Restore implementation to migrate a
bhyve guest from one FreeBSD host to another FreeBSD host. To migrate a
bhyve guest, one needs to start an empty guest on the destination host
from a shared guest image using the bhyve tool with the -R option
followed by the source host IP and the port to listen to migration
request. On the source host, the migration is started by executing the
bhyvectl command with the --migrate option, followed by the destination
host IP and the port to send to the messages.
New features added:
* Create the socket connection between source and destination hosts
* Migrate the guest state via sockets
* Separate the suspend/resume/migration code from the bhyverun.c and
bhyvectl.c and added two new files for them: migration.c and
migration.h
* Added save/restore state for xhci
* Added save/restore state for fbuf
* Fix vhpet restore state issues (timers related)
* Add partially support for suspending and resuming a Linux guest
Future tasks:
* Check if live migration can be implemented using the FreeBSD's
Copy-on-Write mechanism
* Add live migration support by using EPT (Intel)
* Add live migration support by using NPT (AMD)
* Add suspend/resume support for nvme
* Add suspend/resume support for virtio-console
* Add suspend/resume support for virtio-scsi
* Fix restore timers issues
* Fix suspending bhyve - threads issues
* Fix suspending bhyve - mutexes issues
* Add suspend/resume support for Windows guests
This project was sponsored by Matthew Grooms, and iXsystems.
__________________________________________________________________
SMAP
Contact: Konstantin Belousov <kib at FreeBSD.org>
Support for SMAP (Supervisor-Mode Access Prevention), has been added to
the amd64 kernel. The SMAP feature makes any access from the supervisor
mode to the pages accessible to user mode cause a fault, unless the
%eflags.AC bit is set at the time of the access.
The SMAP implementation uses the ifunc framework to avoid checking for
the SMAP capability of hardware on each call to copyout(9) and other
functions.
In the amd64 architecture, FreeBSD has a common address space between
the kernel space and user space. Enabling SMAP virtually splits the
shared address space into two disjoint address spaces, which have
different access criteria. This splitting of the address space provides
a relatively low-overhead way of catching direct accesses from kernel
to usermode, when not using the copyout(9) family of functions. The
copyout(9) family of functions are permitted direct access to user
space. Any direct access from kernel mode to user address space that
isn't performed through the copyout(9) family of functions indicates a
potential programming error.
It is interesting that very few bugs were found in the FreeBSD kernel
after the SMAP feature was enabled. One issue that was identified
existed in the pci(9) user driver. Enabling the SMAP feature identified
at least two ports, VBox and acpi_call, which appeared to access
userspace in an unsafe manner.
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
String functions on the amd64 architecture
Contact: Mateusz Guzik <mjg at FreeBSD.org>
Functions like memset, memmove and memcpy are very frequently used by
virtually all programs. They can be optimized in various ways, but
FreeBSD uses very rudimentary implementations using rep movsq/stosq.
rep prefix has high startup latency which is overly expensive when
dealing with small sizes.
Short term goal of this project is to implement faster variants for the
kernel and import them into libc. The main speed up comes from not
using rep for small sizes (< 256) and from aligning target buffers to
16 bytes when rep is used. On top of that runtime detection of the
Enhanced REP MOVSB/STOSB extention can be used to only use rep
movsb/stosb.
Mid term goal extends userspace. SIMD extensions can be used to make
these functions faster. They can't easily be used in the kernel: SIMD
registers are not saved on transitions user<->kernel for performance
reasons. Thus any use would have to take care of saving these
registers, which can consume any advantage from using them in the first
place. This is not a concern for userspace code.
There is a BSD-licensed implementation in bionic:
https://android.googlesource.com/platform/bionic/+/master/libc/arch-x86
_64/string/
which with some modifications can be used in libc later on.
See the Intel Optimization Manual for reference:
https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64
-ia-32-architectures-optimization-manual.pdf
This project was sponsored by The FreeBSD Foundation.
__________________________________________________________________
Usermode mapping of PCI BARs
Contact: Konstantin Belousov <kib at FreeBSD.org>
Modern PCI(e) devices typically define memory-mapped BARs (Base Address
Registers) to make a memory region available to the device. Each BAR
has a separate page-aligned boundary and memory region associated with
it. This is enforced by the need of hypervisors to provide the
pass-through using VT-d, which operates with memory and has the
granularity of one page for access control. As is, it also means that
the BARs have a suitable configuration for providing access to
usermode, controlling access by the normal page tables.
Linux already gives a way for userspace mapping of BARs using sysfs.
Of course, if a userspace program has enough privileges, it can read a
BAR, determine the physical address of the mapping as seen by CPU, and
use mem(4) (aka /dev/mem) to mmap() that region of memory. This is very
cumbersome, and leaves many unresolved issues. For example, a BAR might
be not activated, which would require involvement of the IOMMU on some
architectures. Also this rude approach makes it very hard to create
mappings with the correct caching attributes.
The FreeBSD pci(4) driver was enhanced to support such mappings, and
pciconf(8) utility was extended to use the new support. See pci(4) for
PCIOCBARMMAP ioctl(2) request description for details, and pciconf(8)
for the -D switch.
TODO: automatically activate the BAR on mapping, this is not done yet.
There is a problem with avoiding the resource conflicts on possible
future attachmens of the kernel driver.
This project was sponsored by The FreeBSD Foundation, and Mellanox
Technologies.
__________________________________________________________________
Architectures
Updating platform-specific features and bringing in support for new
hardware platforms.
Allwinner SoC Support
Contact: Emmanuel Vadot <manu at FreeBSD.org>
* SPI driver added for A64 SoC
* Thermal driver added/fixed for A64/H3/H5 SoCs
* Lot of bugs where fixed in the mmc driver, stability should be
better
* New driver for AXXP803 which is the power chip companion of the A64
SoC
* Add overlays to use another timer controller as the default one in
A64 if faulty These overlay is enabled in the PINE64/LTS images by
default
__________________________________________________________________
Armada 38x FreeBSD support
Links
PRODUCT BRIEF
URL: https://www.marvell.com/documents/egrkpyqzpoebxblyeept/
Contact: Marcin Wojtas <mw at semihalf.com>
Contact: Patryk Duda <pdk at semihalf.com>
Contact: Rafal/ Kozik <rk at semihalf.com>
The Marvell Armada 38x is a very poplular ARMv7-based dual core SoC.
Thanks to the multiple low and high speed interfaces the platform is
used in a wide range of products, such as Network-Attached Storage
(NAS), Wi-Fi Access Point (WAP) and others.
Since last report, remaining Armada 38x support was integrated to HEAD,
which can now compile with the armv7 GENERIC config and use unmodified
sys/gnu/dts device trees. The details are as follows:
* GENERIC config
* Introduce a vast rework of the sys/arm/mv directory for arm and
armv7 platforms.
* Enable PLATFORM support for Marvell ARMv7 SoCs, which can now can
boot with GENERIC kernel.
* Base on dynamic detection of SoC type and device tree instead of
using ifdefs and enable more flexible environment for maintaining
Marvell platforms.
* sys/gnu/dts device trees
* Improve platform code and the drivers (e.g. CESA, PCIE, GPIO) to
properly work with original Linux device trees.
* GPIO
* Add multiple fixes and improvements to the sys/arm/mv/gpio.c
* Rework driver to properly integrate with HEAD GPIO frameworks (main
and gpioled)
* Enable support for both old and Linux GPIO device tree bindings, so
that multiple controllers can be used.
This project was sponsored by Stormshield, and Semihalf.
__________________________________________________________________
ARMv6 and ARMv7 image now use EFI loader
Contact: Emmanuel Vadot <manu at FreeBSD.org>
Instead of using the ubldr version of the loader which uses the U-Boot
API, all images now use loader.efi as their primary FreeBSD loader.
This allow us to have a common boot path for all arm and arm64 images.
__________________________________________________________________
DTS Update
Contact: Emmanuel Vadot <manu at FreeBSD.org>
DTS files (Device Tree Sources) were updated to be on par with Linux
4.18 for the 12.0 release.
The DTS are now compiled for some arm64 boards as the one present in
U-Boot are now always up-to-date.
__________________________________________________________________
FreeBSD on POWER9
Contact: Matthew Macy <mmacy at FreeBSD.org>
Once Justin Hibbits largely stabilized the powerpc64 port on the POWER9
based Talos II I decided to procure one. I've been slowly working
towards taking powerpc64 to parity with amd64. I've been working in an
out of tree GitHub project - in part to eliminate the need to continue
to support the 11 year old in tree gcc4.
Progress so far:
* Adapted lock_delay to use POWER's SMT scheduling hints rather than
using the yield hint from an older ISA
* Added ifunc support
* Ported the amd64 pmap so FreeBSD can use POWER9's new radix tree
page tables. This will give us superpages mostly for free.
* Reduced the overhead of copyinout primitives for radix.
* Converted the copyinout primitives to ifuncs to switch between the
old and the new at initialization time.
* Converted pmap to use ifuncs to eliminate the overhead of kobj
dispatch.
* Hot patch out trap handling paths only needed by the older hashed
page table support.
Work in Progress:
* NMI semantics: NMIs need to be emulated by only soft disabling
interrupts, disabling interrupts blocks all interrupts except
machine check exceptions and system resets.
* Superpage support: Superpages work in the functional simulator
running SMT4 but currently crash on real hardware due to incomplete
page walk cache / TLB invalidation.
* Kernel minidump - with radix MMU enabled minidump support was a
fairly straightforward port but time needs to be spent on test /
debug.
* EARLY_AP_STARTUP - preliminary patches exist, but this is more work
on !x86 architectures due to IPI setup not being tied to the CPU
code.
A list of the other items needed to achieve kernel feature parity with
a (wishful) list of milestones can be found at:
https://github.com/POWER9BSD/freebsd/projects/1
__________________________________________________________________
FreeBSD on PowerNV (ppc64)
Contact: Patryk Duda <pdk at semihalf.com>
Contact: Wojciech Macek <wma at FreeBSD.org>
Contact: Michal Stanek <mst at semihalf.com>
Contact: Nathan Whitehorn <nw at FreeBSD.org>
Semihalf is happy to announce that FreeBSD is now running on IBM
POWER8. This project is a continuation of work done by Nathan Whitehorn
who provided basic support for a PowerNV emulator.
The IBM POWER8 family of CPUs offers superior performance compared to
previous Power series. It provides complete NUMA support with up to 192
cores in a two socket system (up to 8 threads per core). All IO
communication is handled by integrated PCIe interface equipped with
multiple IOMMU engines.
The support for POWER8 system running FreeBSD in Non-Virtualized
environment contains:
* Generic driver for OPAL hypervisor
* kboot loader modifications to allow Little-Endian loader to load a
Big-Endian kernel ELF
* skiboot update for ELF-parser allowing it to understand FreeBSD
kernel file format
* Basic support for PowerNV architecture, including modes of
operation, MMU, interrupt controller
* SMP operation (tested with 128 CPU configuration)
* PHB subsystem driver, including IOMMU mapping for external buses
* PCIe host controller driver
* USB-3.0 XHCI driver
* Reworked drivers to be Big-Endian compatible:
* Chelsio cxgbe(4) 10/25G network adapter
* NVMe SSD drive
All work has been merged into HEAD and will be included in FreeBSD
12.0-RELEASE.
Sponsors: IBM, FreeBSD Foundation, QCM Technologies, Semihalf,
Limelight Networks.
The project is kindly initiated and supported by Limelight Networks
(Kevin Bowling).
__________________________________________________________________
FreeBSD on RISC-V
Contact: Ruslan Bukin <br at FreeBSD.org>
FreeBSD/RISC-V has been one of the actively supported projects during
the past year.
On a compiler front we have upstreamed FreeBSD OS-dependent bits for
GNU toolchain. It was updated to GCC 8.1 and Binutils 2.30. FreeBSD
packages are available.
FreeBSD Testsuite and required dependencies were successfully built for
RISC-V and we did a test run: 152 tests failed out of 5186, which
demonstrates a very good result for initial run and reveals areas to
work on.
We have added support for compressed ISA extension to KDB debugger and
DTrace FBT provider enabling C-compressed kernel and userland by
default. The output of disassembling instructions in KDB is looking
similar to objdump.
QEMU has updated to latest privilege spec allowing us to bring up
FreeBSD on it. The emulation is quite fast: it takes one second only to
boot FreeBSD to single-user mode in QEMU:
https://www.youtube.com/watch?v=FnWpRBaWF18
Platform-Level Interrupt Controller (PLIC) driver was added. Interrupt
support was converted to INTRNG. PLIC is used in QEMU for virtio
network and block devices. With these changes, a full FreeBSD
distribution can now be booted in QEMU.
Network virtualization support (VIMAGE) was fixed and enabled by
default now.
In order to support RocketChip and derivatives we had to work on
A(accessed), D(dirty) PTE (page table entry) bits management. We have
successfully tested this on a lowRISC board and it is booting to
multiuser just fine. lowRISC UART driver was added.
Superuser-User-Modify (SUM) bit in status register is now used: kernel
can access userspace only within certain functions that explicitly
handle crossing user/kernel boundary.
__________________________________________________________________
PINE64-LTS Image
Contact: Emmanuel Vadot <manu at FreeBSD.org>
We now produce an image for the PINE64-LTS. This image works on the
PINE64-LTS and the Sopine with Baseboard.
__________________________________________________________________
PocketBeagle Support
Links
Pocket Beagle
URL: https://www.beagleboard.org/pocket
Contact: Emmanuel Vadot <manu at FreeBSD.org>
Contact: Tom Jones <thj at FreeBSD.org>
The Pocket Beagle is the latest member of the BeagleBoard family.
Support for it was added and the Beaglebone image can be used on it
directly.
__________________________________________________________________
RPI Firmware/DTB/U-Boot Update
Contact: Emmanuel Vadot <manu at FreeBSD.org>
Contact: U-Boot mailing list <uboot at FreeBSD.org>
The RaspberryPi firmware loads the DTB from the FAT partition based on
the model. U-Boot now uses this DTB and passes it to the FreeBSD
loader/kernel instead of using the DTS embedded in U-Boot. This allow
the FreeBSD Kernel to use the RaspberryPi Foundation provided DTB
overlays to enable HATs. The overlays can be obtained by installing the
rpi-firmware package.
A new U-Boot port for the W variant of the RPI0 was committed as
u-boot-rpi-0-w. Some experiments started by Edward Tomasz Napierala
(trasz@) have shown that we could possibly produce a generic image for
all armv6 RPI (RPI-B, RPI0 and RPI0W).
__________________________________________________________________
Ports
Changes affecting the Ports Collection, whether sweeping changes that
touch most of the tree, or individual ports themselves.
KDE on FreeBSD
Links
KDE FreeBSD
URL: https://FreeBSD.kde.org/
Contact: Adriaan de Groot <adridg at FreeBSD.org>
Contact: Tobias C. Berner <tcberner at FreeBSD.org>
KDE FreeBSD is responsible for the ports of the Plasma5 and KDE4
desktops, and all associated applications. Further we also manage the
Qt4 and Qt5 ports, as well as CMake.
We also care for the FreeBSD builders for KDE's upstream CI on
build.kde.org.
Since the last status report a lot of things have changed. First and
foremost, the Plasma5 Desktop and the Qt5 based KDE Applications have
finally made their way into the official ports tree after lingering for
multiple years in our development repository.
Secondly KDE4 has been marked deprecated and will be removed at the end
of the year. With Qt4 following no later than the next year (due to the
exponentially increasing burden of maintenance).
On a more technical side, bsd.qt.mk has been replaced by qt.mk and
qt-dist.mk. The porter's handbook is being updated (with thanks to
Tobias Kortkamp).
Further we have been keeping CMake and Qt5 and almost every other port
under our control up to date. SDDM has been updated to the
next-to-latest release with backported security fixes.
One big issue we have is www/qt5-webengine, which requires too much
time to keep up to date, as the underlying chromium is in need of many
patches, which change with every release. Another upcoming issue is the
way in which FreeBSD's libinput lags behind. This blocks future updates
to KDE Plasma as well as Wayland improvements. Thankfully x11@ is
looking at this issue already, so it should be fixed soon -- for the
meantime people who want to give the latest KDE Plasma Desktop a try
can use the appropriate branch from our GitHub.
People who are willing to contribute can find us on #kde-freebsd on
freenode, the kde at FreeBSD.org mailing list. Further, we accept
pull-requests and contributions on
github.com/freebsd/freebsd-ports-kde.
__________________________________________________________________
Puppet
Links
PuppetLab's FreeBSD slack channel
URL: https://puppetcommunity.slack.com/messages/C6CK0UGB1/
BSDCan 2018: IT automation with Puppet
URL: https://www.bsdcan.org/2018/schedule/events/930.en.html
Contact: Puppet Team <puppet at FreeBSD.org>
Since our last status report last year, the puppet@ team regularly
updated the Puppet ports to catch on upstream releases. We have also
held a Puppet talk at BSDCan.
More recently, Puppet 6 was released, and a bunch of new ports appeared
in the FreeBSD ports tree: sysutils/puppet6, sysutils/puppetserver6,
databases/puppetdb6 being (obviously) the main ones. In this update,
the Puppet language has not been heavily modified. As a consequence,
upgrading from Puppet 5 to Puppet 6 is an easy task compared to the
experience you may have encountered from previous major version bumps.
If you are still using Puppet 4, we recommend to schedule an upgrade
soon: Puppet 4 is expected to be EOL by the end of 2018.
Because distributing Marionette Collective modules via Puppet is more
efficient than using packages, the
sysutils/mcollective-\*-{agent,client} ports have been deprecated.
Marionette Collective itself being phased out by PuppetLabs, the
sysutils/mcollective port is expected to be deprecated at some point in
the future, but we plan to keep it until an alternative is available.
This alternative, called Choria, is in active development by
R.I.Pienaar the original author of Marionette Collective. We are
actively working with him to support FreeBSD out of the box, and will
commit sysutils/choria to the tree as soon as it is considered a
drop-in replacement for Marionette Collective.
__________________________________________________________________
scarab: CLI tool for Bugzilla-related workflows
Links
GitHub repo
URL: https://github.com/gonzoua/scarab
Contact: Oleksandr Tymoshenko <gonzo at FreeBSD.org>
scarab is a CLI tool that makes some of Bugzilla functionality
available from the command line. Normally users interact with the
bugtracker using a web browser but for certain workflows, Web UI may be
more of an obstacle than help requiring to perform more steps compared
to CLI tool.
Bugzilla provides XML-RPC interfaces that can be used for
automation/integration and there are several CLI tools like pybugz that
can be used with bugs.FreeBSD.org as-is. They are generic
one-size-fits-all tools which mean they can do a lot of thing at the
cost of more complex CLI.
scarab was created to be more specialized and less complex with
following principles in mind:
* Be an auxiliary tool, not a replacement for the web UI
* Move complexity to a configuration file, keep arguments as simple
as possible
* Optimize for most common/tedious tasks
Based on my experience with Bugzilla following tasks were identified as
candidates for inclusion in the first release of the tool:
* Downloading attachment on host machine and copying it to devbox
* Creating a file on the devbox and copying it to a host machine to
be attached through Web UI
* Creating PRs with common fields' values
First two operations were implemented as files, fetch, fetchall, attach
commands of the tool.
The third operation was implemented by introducing PR templates, set of
predefined field/value pairs, that can be combined run-time to provide
higher flexibility. More information and usage examples can be found in
the config file example
__________________________________________________________________
Documentation
Noteworthy changes in the documentation tree or new external
books/documents.
Cleaning up the Wiki
Links
Wiki Fixit Group Website
URL: https://wiki.FreeBSD.org/WikiFixitGroup/
IRC channel
URL: irc://freebsd-wiki at irc.freenode.net
Contact: <wiki-admin at FreeBSD.org>
The FreeBSD Wiki used to be a scratch pad for the FreeBSD developers to
organize projects, store notes and publish articles that were about to
be added to the handbook. Recently, however, the FreeBSD wiki started
to attract more and more people from the wider FreeBSD community, which
resulted in a change of the character of the wiki.
As a result we decided to discuss the future of the tools we want to
use for documentation in FreeBSD (one of such discussions was held
during BSDCam 2018, you may see some notes here). The general
conclusion is that wiki is a great tool for what it was meant for:
organizing projects and notes in the community of developers. We should
not move all our documentation (especially handbooks) to Wiki as the
quality and maintainability would suffer. On the other hand, the
current workflow of submitting documentation patches, which involves
checking out the doc tree and patching XML files is not ideal for many
end users. This is why we are trying to approach the problem from
various directions:
1. The wiki is being cleaned up of old content. We are trying to
define a clear hierarchy of subpages and categories to make
navigating the wiki easier.
2. Some articles from the wiki are going to be migrated to either the
doc tree or manual pages.
__________________________________________________________________
Quarterly Reports
Contact: Edward Tomasz Napiera?a <trasz at FreeBSD.org>
Contact: Mateusz Piotrowski <0mp at FreeBSD.org>
The Quarterly Reports have been resurrected after almost a year long
hiatus. The old workflow, which consisted of users submitting
XML-formatted entries, which would then get hand-assembled into
DocBook, was replaced with a new one, using Markdown instead. The XML
submission form was replaced with GitHub Pull Requests. This should
make submissions and editing much easier and user-friendly.
__________________________________________________________________
Third-Party Projects
Many projects build upon FreeBSD or incorporate components of FreeBSD
into their project. As these projects may be of interest to the broader
FreeBSD community, we sometimes include brief updates submitted by
these projects in our quarterly report. The FreeBSD project makes no
representation as to the accuracy or veracity of any claims in these
submissions.
HardenedBSD 2018Q3 Update
Contact: Shawn Webb <shawn.webb at hardenedbsd.org>
Our last report was June 2017. A lot has transpired since then. In this
status report, we will attempt to briefly cover all the progress we've
made, including the few commits that made it upstream to FreeBSD.
On 01 Jul 2018, we switched back to OpenSSL as the crypto library
provider in base. We did this because we lack the resources and the
documentation for properly supporting LibreSSL in base. We still
maintain LibreSSL in base; however, OpenSSL is simply the default
crypto library (aka, WITHOUT_LIBRESSL is the default). We look forward
to building a development community around LibreSSL in HardenedBSD such
that we can re-enable LibreSSL by default, providing enhanced security
for our users through the rejection of software monocultures.
Cross-DSO Control Flow Integrity (Cross-DSO CFI) is an exploit
mitigation from llvm that provides forward-edge protections across
shared library and application boundaries. With HardenedBSD 12-STABLE,
we launched non-Cross-DSO CFI support in base. Meaning, CFI is only
applied to applications and not shared libraries. Along with SafeStack,
which provides backward-edge protections, Cross-DSO CFI requires both
ASLR and W^X for effectiveness as they store crucial metadata needing
protection. HardenedBSD expertly, efficiently, and robustly fulfill
those requirements through its PaX ASLR and PaX NOEXEC implementations.
Over the past two years, we have slowly worked on Cross-DSO CFI support
in HardenedBSD. In mid-2018, we made enough progress that we could
publish an alpha Call-For-Testing (CFT). We need to integrate the
Cross-DSO CFI support with the RTLD such that function pointers
resolved through dlopen(3)/`dlsym(3)` work properly with the cfi-icall
scheme. We also need to perform experimental package builds, find
breakages, and fix those breakages. We hope to officially debut
Cross-DSO CFI in the latter half of 2019 with the possibility of
pushing back to 2020. HardenedBSD remains the first and only enterprise
operating system to use CFI across the base set of applications.
On 20 Aug 2018, we launched a new tool called hbsdcontrol(8) to toggle
exploit mitigations on a per-application basis. hbsdcontrol(8) uses
filesystem extended attributes and is the preferred method for exploit
mitigation toggling for those filesystem that support extended
attributes (UFS, ZFS). Our original utility, secadm, should be used
with filesystems that do not support extended attributes (NFS).
In September 2018, the HardenedBSD Foundation Corp became a 501(c)(3)
tax-exempt, not-for-profit organization in the USA. This means that
donations by US persons are eligible for tax deductions. The creation
of the HardenedBSD Foundation will ensure that HardenedBSD remains
successful long-term. We look forward to working with the BSD community
to provide an open source, clean-room reimplementation of the
grsecurity patchset based on publicly-available documentation.
We assisted Kyle Evans with the new bectl(8) utility, primarily
enhancing jail support and fixing regressions. We are grateful for Kyle
Evans' assistance in landing the enhancements upstream in FreeBSD and
his overall responsiveness and helpfulness.
Relevant commits for the bectl(8) are:
* r339047
* r338221
* r337993
* r337947
We taught bhyve(8) how to live in a jailed environment, allowing users
to jail the hypervisor. We hardened the virtual address space of
bhyve(8) by using guard pages. This work made it upstream to FreeBSD.
We are grateful to those in FreeBSD who provided insight to increase
the quality and efficiency of our patches.
__________________________________________________________________
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