- boot-architecture - lists.linaro.org

Re: [Arm.ebbr-discuss] [PATCH 1/2] Add revision history table

by Grant Likely

On 24/05/2018 14:33, Daniel Thompson wrote: > On Tue, May 22, 2018 at 05:14:00PM +0100, Grant Likely wrote: >> Adds the revision history table to the markup. >> >> Resolves: #4 >> Signed-off-by: Grant Likely <grant.likely(a)arm.com> >> --- >> source/ebbr.rst | 13 +++++++++++++ >> 1 file changed, 13 insertions(+) >> >> diff --git a/source/ebbr.rst b/source/ebbr.rst >> index 4100b2f..b6e48d6 100644 >> --- a/source/ebbr.rst >> +++ b/source/ebbr.rst >> @@ -18,6 +18,19 @@ Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. >> :alt: Creative Commons License >> :align: right >> >> +.. tabularcolumns:: l c p{11.5cm} >> +.. table:: Revision History >> + >> + ================= ===== ============================================= >> + Date Issue Changes >> + ================= ===== ============================================= >> + 20 September 2018 B Confidentiality Change, EBBR version 0.51 >> + TBD TBD - Relicense to CC-BY-SA 4.0 >> + - Added Devicetree requirements >> + - Added Multiprocessor boot requirements >> + - Transitioned to reStructuredText and GitHub >> + ================= ===== ============================================= > > Is this going to be hand curated (e.g. patches that fail to update > changelog properly get caught during review) or will it be derived > post-hoc from the git history? Hand curated until someone writes a script to scrape commit lines. I don't think this table needs to be exhaustive though. Just the big picture items. Anyone who really cares can read the changebar version, or even just the git history. g. > > > Daniel. > IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 1 month

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[PATCH 1/2] Add revision history table

by Grant Likely

Adds the revision history table to the markup. Resolves: #4 Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- source/ebbr.rst | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/source/ebbr.rst b/source/ebbr.rst index 4100b2f..b6e48d6 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -18,6 +18,19 @@ Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. :alt: Creative Commons License :align: right +.. tabularcolumns:: l c p{11.5cm} +.. table:: Revision History + + ================= ===== ============================================= + Date Issue Changes + ================= ===== ============================================= + 20 September 2018 B Confidentiality Change, EBBR version 0.51 + TBD TBD - Relicense to CC-BY-SA 4.0 + - Added Devicetree requirements + - Added Multiprocessor boot requirements + - Transitioned to reStructuredText and GitHub + ================= ===== ============================================= + ******************* About This Document ******************* -- 2.13.0

7 years, 1 month

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[PATCH] Issue#10 Add EBBR compliance test

by Udit Kumar

This patch adds a appendix for EBBR compliance test. Signed-off-by: Udit Kumar <udit.kumar(a)nxp.com> --- source/ebbr.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/source/ebbr.rst b/source/ebbr.rst index 40f03f1..880f126 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -557,6 +557,22 @@ Service UEFI § EFI_ISCSI_INITIATOR_NAME_PROTOCOL 16.2 ========================================== ====== +******************************************* +APPENDIX E - EBBR Compliance Tests +******************************************* + +UEFI Self Certification Tests (SCT) test the UEFI implementation. +EBBR is leveraging from UEFI, UEFI SCT test suites check for compliance +against the EBBR specification. +To build UEFI SCT, please refer https://github.com/UEFI/UEFI-SCT + +EBBR is very flexible and many features are platform dependent. +Therefore platform owner can decide, to implement and test optional features +with UEFI SCT. + + + + .. note:: Support for iSCSI is only required on machines that lack persistent storage, such as a, HDD. This configuration is intended for thin clients and compute-only nodes -- 1.9.1

7 years, 1 month

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[PATCH] Trivial: Fix glossary entrys

by Grant Likely

Some of the glossary terms got split across lines which put half the term in the description instead of the entry name. Fix the 'AArch64 State' and 'EFI Loaded Image' entries. Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- source/ebbr.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/source/ebbr.rst b/source/ebbr.rst index 4269b49..9e787ed 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -77,16 +77,16 @@ This document uses the following terms and abbreviations. The 64-bit ARM instruction set used in AArch64 state. All A64 instructions are 32 bits. - AArch64 - state The ARM 64-bit Execution state that uses 64-bit general purpose + AArch64 state + The ARM 64-bit Execution state that uses 64-bit general purpose registers, and a 64-bit program counter (PC), Stack Pointer (SP), and exception link registers (ELR). AArch64 Execution state provides a single instruction set, A64. - EFI - Loaded Image An executable image to be run under the UEFI environment, + EFI Loaded Image + An executable image to be run under the UEFI environment, and which uses boot time services. EL0 -- 2.13.0

7 years, 1 month

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EBBR Weekly - Notes 17 May 2018

by Grant Likely

https://github.com/ARM-software/ebbr/wiki/EBBR-Notes-2018.05.17 # 17 May 2018 ## Attendees * Alex Graf (SUSE) * Ryan Harkin (Linaro) * Rob Herring (Linaro) * Udit Kumar (NXP) * Grant Likely (Arm) * Bill Mills (TI) * Tom Rini (Konsulko) * Daniel Thompson (Linaro) ## Agenda * Issue/Action review * Any other business ## Notes ### Issue/Action review * Issue #1 - Bill will assign to himself * Issue #2 - Leif on Holiday * Issue #3 - Daniel will take * Issue #4 - grant to take * Issue #8 - partitioning tool rules - Daniel will take * Issue #10 & 11 - Assign to Udit * Issue #10 - Document how to certify * Dong added that we can probably leverage UEFI SCT * Issue #13 - Daniel to take ### Other Business Rob: Looks like there is interest from the Google/Android folks in EBBR * Rob to set up a meeting with the relevant folks IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 1 month

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[PATCH] Remove MP Start protocol from EBBR and revert to PSCI v1.0

by Grant Likely

EBBR platforms are unlikely to ever use the MP Start protocol used in some AArch64 server systems. It was only used to support platforms without EL3. No more EL2-only platforms are expected, and MP Start is being removed from the next release of SBBR. Devicetree platforms in the same scenario use the Linux spin table protocol instead. MP Start was only included for completeness to align the SBBR and EBBR specifications. Therefore remove it entirely, leaving PSCI and spin table as the only acceptable implementations. Also revert to PSCI v1.0 as that is the minimum level of functionality required. PSCI v1.1 adds new capabilities, but is not required for interoperability. Suggested-by: Dong Wei <dong.wei(a)arm.com> Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- source/ebbr.rst | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/source/ebbr.rst b/source/ebbr.rst index 40f03f1..4100b2f 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -329,10 +329,9 @@ Power State Coordination Interface specification[PSCI_]. Platforms without EL3 must implement one of: - PSCI at EL2 (leaving only EL1 available to an operating system) -- MP Startup for Arm[MPSTART_] (ACPI Parking Protocol) on an ACPI platform -- Linux AArch64 spin tables[LINUXA64BOOT_] on a Devicetree platform +- Linux AArch64 spin tables[LINUXA64BOOT_] (Devicetree only) -However, the MP Startup and Spintable protocols are strongly discouraged. +However, the spin table protocol is strongly discouraged. Future versions of this specification will only allow PSCI, and PSCI should be implemented in all new designs. @@ -575,13 +574,9 @@ EFI_ISCSI_INITIATOR_NAME_PROTOCOL 16.2 <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tre…>`_, Linux kernel -.. [MPSTART] `MP Startup for Arm - <https://acpica.org/sites/acpica/files/MP%20Startup%20for%20ARM%20platforms.…>`_, - 20 December 2012, `Microsoft <http://microsoft.com>`_ - -.. [PSCI] `Power State Coordination Interface Issue D (PSCI v1.1) - <http://infocenter.arm.com/help//topic/com.arm.doc.den0022d/Power_State_Coor…>`_, - 21 April 2017, `Arm Limited <http://arm.com>`_ +.. [PSCI] `Power State Coordination Interface Issue C (PSCI v1.0) + <https://static.docs.arm.com/den0022/c/DEN0022C_Power_State_Coordination_Int…>`_ + 30 January 2015, `Arm Limited <http://arm.com>`_ .. [SBBR] `Arm Server Base Boot Requirements specification Issue B (v1.0) <https://static.docs.arm.com/den0044/b/DEN0044B_Server_Base_Boot_Requirement…>`_ -- 2.13.0

7 years, 1 month

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Re: [Arm.ebbr-discuss] [PATCH] Be specific about DT or ACPI requirements

by Grant Likely

On 18/05/2018 18:08, Mark Brown wrote: > On Fri, May 18, 2018 at 06:04:11PM +0100, Grant Likely wrote: > >> My bikeshed now has a sign that reads: > >> +As stated above, EBBR systems must not provide both ACPI >> +and Devicetree tables at the same time. >> +Systems that support both interfaces must provide a configuration >> +mechanism to select either ACPI or Devicetree, >> +and must ensure only the selected interface is provided >> +to the OS loader. > > I think that's a very pleasing shade, thanks! :) > > (Sorry, I spent far too long working on interoperability of some > particularly poorly specified networking standards so now have > difficulty reading any spec without assuming the worst.) > Thanks! I'll take that as you're Acked-by then. :-) g.

7 years, 1 month

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Re: [Arm.ebbr-discuss] [PATCH] Be specific about DT or ACPI requirements

by Grant Likely

On 18/05/2018 17:45, Mark Brown wrote: > On Fri, May 18, 2018 at 05:28:10PM +0100, Grant Likely wrote: > >> +Devicetree tables at the same time. Platforms that want to offer >> +both ACPI and Devicetree solutions must implement a boot time >> +mechanism to select one or the other, before the OS Loader is >> +executed. > > How about "...must configure this using a mechanism that ensures that > one or the other is chosen and provided to the OS loader when it is > executed"? It doesn't really matter for sensible systems but I can see > someone misreading the above and thinking there must be a prompt on boot > or something, I do think this is me being paranoid about perverse > implementors though. > My bikeshed now has a sign that reads: +As stated above, EBBR systems must not provide both ACPI +and Devicetree tables at the same time. +Systems that support both interfaces must provide a configuration +mechanism to select either ACPI or Devicetree, +and must ensure only the selected interface is provided +to the OS loader. g.

7 years, 1 month

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Re: [Arm.ebbr-discuss] [PATCH] Move citations to the end of the document

by Grant Likely

On 18/05/2018 14:18, Tom Rini wrote: > On Fri, May 18, 2018 at 02:06:08PM +0100, Grant Likely wrote: > >> Use reStructuredText citation markup to capture all referenced >> documents. Sphinx will take care of creating a table of references at >> the end of the document. >> >> Fixes #6 >> Signed-off-by: Grant Likely <grant.likely(a)arm.com> > [snip] >> @@ -132,22 +115,11 @@ This document defines the boot and runtime services that are expected by an >> Operating System or hypervisor, for an ARM embedded device, which follows the >> UEFI specification. >> >> -This document references the following specification and versions: >> - >> - UEFI 2.7 >> - Published June 2017, includes the AArch64 bindings. >> - > > Is it clear enough when rendering the final document that here we don't > need a link down to the UEFI reference? Not sure what you mean. Can you elaborate? I do think the introduction chapter needs to be reworked anyway to talk about standardizing the firmware interface. It too quickly jumps to "when UEFI is chosen", when what I'd rather it present is "here is a standardized platform taylored to embedded systems"... and then get to UEFI is part of that standard. (it isn't about chosing UEFI; it is about choosing a standard platform) > >> This specification defines the boot and runtime services for a physical system, >> including services that are required for virtualization. >> It does not define a standardized abstract virtual machine view for a Guest >> Operating System. >> >> -When present with in a system, this document makes additional references to the >> -Power State Coordination Interface: >> - >> - PSCI 1.1 >> - Published April 2017. >> - > [snip] >> @@ -306,9 +278,10 @@ command: >> >> - EfiWarmReset() >> >> -.. note:: When Runtime Services and PSCI co-exist, it is anticipated that >> - Operating System calls to reset the system will go via Runtime Services and >> - not directly to PSCI. >> +.. note:: On platforms implementing the Power State Coordination Interface >> + specification[PSCI_], it is still required that EBBR compliant >> + Operating Systems calls to reset the system will go via Runtime Services >> + and not directly to PSCI. >> >> Set Variable >> ------------ > > Is all of the above equivalent in terms of talking about PSCI? Thanks! Ummm, yes? But I'm not sure that I understand what you're asking. Thanks for the reviews on all the other patches. g.

7 years, 1 month

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Multi-cpu boot protocol?

by Grant Likely

I'm adding some EBBR text around the CPU state at boot and I've lost track of what is being done for multicore bringup. What is the current state-of-the-art for multicore boot protocol when PSCI isn't available? SBBR allows for the MP Boot Protocol; with the intend of phasing it out: https://acpica.org/sites/acpica/files/MP%20Startup%20for%20ARM%20platforms.… The kernel documents the spin table method: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tre… What are the cool kids currently doing here? g. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 1 month

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Re: [Arm.ebbr-discuss] [PATCH] Move contributing details to CONTRIBUTING file

by Daniel Thompson

On Wed, May 16, 2018 at 03:46:06PM +0100, Grant Likely wrote: > To match convention used by many projects on GitHub, put the > contribution details into a separate file instead of the top level > README. Also tighten up some of the language around contributing to be > clearer. > > Suggested-by: Jilayne Lovejoy <jilayne.lovejoy(a)arm.com> > Signed-off-by: Grant Likely <grant.likely(a)arm.com> > --- > CONTRIBUTING.rst | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Makefile | 2 +- > README.rst | 67 ++++------------------------------------------------- > source/ebbr.rst | 4 ++-- > 4 files changed, 78 insertions(+), 65 deletions(-) > create mode 100644 CONTRIBUTING.rst > > diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst > new file mode 100644 > index 0000000..e101e5f > --- /dev/null > +++ b/CONTRIBUTING.rst > @@ -0,0 +1,70 @@ > +Contributing > +============ > + > +Master copy of this project is hosted on GitHub: > +https://github.com/ARM-software/ebbr > + > +Anyone may contribute to the EBBR project. > +Contributions are licensed under CC-BY-SA-4.0_ and must be made with a > +Developer Certificate of Origin (DCO_) attestation as described below. > + > +EBBR discussion uses the boot-architecture_ and arm.ebbr-discuss mailing lists. > +The 'official' list is arm.ebbr-discuss, but the list archives are not > +yet public, so boot-architecture_ is being used to keep everything in > +the open. > + > +* boot-architechture(a)lists.linaro.org That is not how you spell "architecture" (as I just discovered when I copy 'n pasted from the current README). Once that is fixed: Reviewed-by: Daniel Thompson <daniel.thompson(a)linaro.org> Daniel. > +* arm.ebbr-discuss(a)arm.com > + > +Past discussions can be found in the boot-architecture-archive_. > + > +We use the IRC channel `#ebbr`_ on OFTC_. > + > +DCO Attestation > +--------------- > + > +To help track the origin of contributions, this project uses the same > +DCO_ "sign-off" process as used by the Linux kernel. > +The sign-off is a simple line at the end of the explanation for the > +patch, which certifies that you wrote it or otherwise have the right to > +pass it on as an open-source patch. > +The rules are pretty simple: if you can certify the below: > + > +Developer's Certificate of Origin 1.1 > +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > + > +By making a contribution to this project, I certify that: > + > + (a) The contribution was created in whole or in part by me and I > + have the right to submit it under the open source license > + indicated in the file; or > + > + (b) The contribution is based upon previous work that, to the best > + of my knowledge, is covered under an appropriate open source > + license and I have the right under that license to submit that > + work with modifications, whether created in whole or in part > + by me, under the same open source license (unless I am > + permitted to submit under a different license), as indicated > + in the file; or > + > + (c) The contribution was provided directly to me by some other > + person who certified (a), (b) or (c) and I have not modified > + it. > + > + (d) I understand and agree that this project and the contribution > + are public and that a record of the contribution (including all > + personal information I submit with it, including my sign-off) is > + maintained indefinitely and may be redistributed consistent with > + this project or the open source license(s) involved. > + > +then you just add a line saying:: > + > + Signed-off-by: Random J Developer <random(a)developer.example.org> > + > +.. _CC-BY-SA-4.0: LICENSE > +.. _#ebbr: https://webchat.oftc.net/?channels=%23ebbr&uio=d4 > +.. _OFTC: https://www.oftc.net/ > +.. _DCO: https://developercertificate.org/ > +.. _boot-architecture: https://lists.linaro.org/mailman/listinfo/boot-architecture > +.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture > + > diff --git a/Makefile b/Makefile > index 91bb4be..46ed82a 100644 > --- a/Makefile > +++ b/Makefile > @@ -17,4 +17,4 @@ help: > # Catch-all target: route all unknown targets to Sphinx using the new > # "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS). > %: Makefile > - @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) > \ No newline at end of file > + @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) > diff --git a/README.rst b/README.rst > index 57fac8f..67c7e85 100644 > --- a/README.rst > +++ b/README.rst > @@ -73,79 +73,22 @@ License > ======= > > This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 > -International License. To view a copy of this license, visit > +International License (CC-BY-SA-4.0). To view a copy of this license, visit > http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to > Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. > > +Contributions are accepted under the same with sign-off under the Developer's > +Certificate of Origin. For more on contributing to EBBR, see CONTRIBUTING.rst_. > + > A copy of the license is included in the LICENSE_ file. > > .. image:: https://i.creativecommons.org/l/by-sa/4.0/88x31.png > :target: http://creativecommons.org/licenses/by-sa/4.0/ > :alt: Creative Commons License > > +.. _CONTRIBUTING.rst: ./CONTRIBUTING.rst > .. _LICENSE: ./LICENSE > > -Contributing > -============ > - > -Master copy of this project is hosted on GitHub: > -https://github.com/ARM-software/ebbr > - > -Anyone may contribute to the EBBR project. EBBR discussion uses the > -boot-architecture_ and arm.ebbr-discuss mailing lists. > -The 'official' list is arm.ebbr-discuss, but the list archives are not > -yet public, so boot-architecture_ is being used to keep everything in > -the open. > - > -* boot-architechture(a)lists.linaro.org > -* arm.ebbr-discuss(a)arm.com > - > -Past discussions can be found in the boot-architecture-archive_. > - > -To help track the origin of contributions, this project uses the same > -DCO_ "sign-off" process as used by the Linux kernel. > -The sign-off is a simple line at the end of the explanation for the > -patch, which certifies that you wrote it or otherwise have the right to > -pass it on as an open-source patch. The rules are pretty simple: if you > -can certify the below: > - > -Developer's Certificate of Origin 1.1 > -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > - > -By making a contribution to this project, I certify that: > - > - (a) The contribution was created in whole or in part by me and I > - have the right to submit it under the open source license > - indicated in the file; or > - > - (b) The contribution is based upon previous work that, to the best > - of my knowledge, is covered under an appropriate open source > - license and I have the right under that license to submit that > - work with modifications, whether created in whole or in part > - by me, under the same open source license (unless I am > - permitted to submit under a different license), as indicated > - in the file; or > - > - (c) The contribution was provided directly to me by some other > - person who certified (a), (b) or (c) and I have not modified > - it. > - > - (d) I understand and agree that this project and the contribution > - are public and that a record of the contribution (including all > - personal information I submit with it, including my sign-off) is > - maintained indefinitely and may be redistributed consistent with > - this project or the open source license(s) involved. > - > -then you just add a line saying:: > - > - Signed-off-by: Random J Developer <random(a)developer.example.org> > - > -IRC Channel: ``#ebbr`` on ofct > - > -.. _DCO: https://developercertificate.org/ > -.. _boot-architecture: https://lists.linaro.org/mailman/listinfo/boot-architecture > -.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture > - > Writers Guide > ============= > > diff --git a/source/ebbr.rst b/source/ebbr.rst > index 414e3af..4269b49 100644 > --- a/source/ebbr.rst > +++ b/source/ebbr.rst > @@ -1,12 +1,12 @@ > .. EBBR Source Document > - Copyright Arm Ltd. 2018 > + Copyright Arm Limited, 2018 > SPDX-License-Identifier: CC-BY-SA-4.0 > > #################################################### > Embedded Base Boot Requirements (EBBR) Specification > #################################################### > > -Copyright © 2017-2018 Arm Ltd and Contributors. > +Copyright © 2017-2018 Arm Limited and Contributors. > > This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 > International License. To view a copy of this license, visit > -- > 2.13.0 > > _______________________________________________ > Arm.ebbr-discuss mailing list > Arm.ebbr-discuss(a)arm.com

7 years, 2 months

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Assigning EBBR issues

by Grant Likely

On the weekly call today I suggested for people to assign issues to themselves if they wanted to take it on. Turns out GitHub doesn't allow that unless you've got write access to the project. So, if you want to take on an issue, add a comment saying so and I'll send you an invite to join the project. Once you've accepted the invite I can assign issues to you. g. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 2 months

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[PATCH] Move contributing details to CONTRIBUTING file

by Grant Likely

To match convention used by many projects on GitHub, put the contribution details into a separate file instead of the top level README. Also tighten up some of the language around contributing to be clearer. Suggested-by: Jilayne Lovejoy <jilayne.lovejoy(a)arm.com> Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- CONTRIBUTING.rst | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 2 +- README.rst | 67 ++++------------------------------------------------- source/ebbr.rst | 4 ++-- 4 files changed, 78 insertions(+), 65 deletions(-) create mode 100644 CONTRIBUTING.rst diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst new file mode 100644 index 0000000..e101e5f --- /dev/null +++ b/CONTRIBUTING.rst @@ -0,0 +1,70 @@ +Contributing +============ + +Master copy of this project is hosted on GitHub: +https://github.com/ARM-software/ebbr + +Anyone may contribute to the EBBR project. +Contributions are licensed under CC-BY-SA-4.0_ and must be made with a +Developer Certificate of Origin (DCO_) attestation as described below. + +EBBR discussion uses the boot-architecture_ and arm.ebbr-discuss mailing lists. +The 'official' list is arm.ebbr-discuss, but the list archives are not +yet public, so boot-architecture_ is being used to keep everything in +the open. + +* boot-architechture(a)lists.linaro.org +* arm.ebbr-discuss(a)arm.com + +Past discussions can be found in the boot-architecture-archive_. + +We use the IRC channel `#ebbr`_ on OFTC_. + +DCO Attestation +--------------- + +To help track the origin of contributions, this project uses the same +DCO_ "sign-off" process as used by the Linux kernel. +The sign-off is a simple line at the end of the explanation for the +patch, which certifies that you wrote it or otherwise have the right to +pass it on as an open-source patch. +The rules are pretty simple: if you can certify the below: + +Developer's Certificate of Origin 1.1 +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +By making a contribution to this project, I certify that: + + (a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + + (b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + + (c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + + (d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. + +then you just add a line saying:: + + Signed-off-by: Random J Developer <random(a)developer.example.org> + +.. _CC-BY-SA-4.0: LICENSE +.. _#ebbr: https://webchat.oftc.net/?channels=%23ebbr&uio=d4 +.. _OFTC: https://www.oftc.net/ +.. _DCO: https://developercertificate.org/ +.. _boot-architecture: https://lists.linaro.org/mailman/listinfo/boot-architecture +.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture + diff --git a/Makefile b/Makefile index 91bb4be..46ed82a 100644 --- a/Makefile +++ b/Makefile @@ -17,4 +17,4 @@ help: # Catch-all target: route all unknown targets to Sphinx using the new # "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS). %: Makefile - @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) \ No newline at end of file + @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) diff --git a/README.rst b/README.rst index 57fac8f..67c7e85 100644 --- a/README.rst +++ b/README.rst @@ -73,79 +73,22 @@ License ======= This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 -International License. To view a copy of this license, visit +International License (CC-BY-SA-4.0). To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. +Contributions are accepted under the same with sign-off under the Developer's +Certificate of Origin. For more on contributing to EBBR, see CONTRIBUTING.rst_. + A copy of the license is included in the LICENSE_ file. .. image:: https://i.creativecommons.org/l/by-sa/4.0/88x31.png :target: http://creativecommons.org/licenses/by-sa/4.0/ :alt: Creative Commons License +.. _CONTRIBUTING.rst: ./CONTRIBUTING.rst .. _LICENSE: ./LICENSE -Contributing -============ - -Master copy of this project is hosted on GitHub: -https://github.com/ARM-software/ebbr - -Anyone may contribute to the EBBR project. EBBR discussion uses the -boot-architecture_ and arm.ebbr-discuss mailing lists. -The 'official' list is arm.ebbr-discuss, but the list archives are not -yet public, so boot-architecture_ is being used to keep everything in -the open. - -* boot-architechture(a)lists.linaro.org -* arm.ebbr-discuss(a)arm.com - -Past discussions can be found in the boot-architecture-archive_. - -To help track the origin of contributions, this project uses the same -DCO_ "sign-off" process as used by the Linux kernel. -The sign-off is a simple line at the end of the explanation for the -patch, which certifies that you wrote it or otherwise have the right to -pass it on as an open-source patch. The rules are pretty simple: if you -can certify the below: - -Developer's Certificate of Origin 1.1 -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -By making a contribution to this project, I certify that: - - (a) The contribution was created in whole or in part by me and I - have the right to submit it under the open source license - indicated in the file; or - - (b) The contribution is based upon previous work that, to the best - of my knowledge, is covered under an appropriate open source - license and I have the right under that license to submit that - work with modifications, whether created in whole or in part - by me, under the same open source license (unless I am - permitted to submit under a different license), as indicated - in the file; or - - (c) The contribution was provided directly to me by some other - person who certified (a), (b) or (c) and I have not modified - it. - - (d) I understand and agree that this project and the contribution - are public and that a record of the contribution (including all - personal information I submit with it, including my sign-off) is - maintained indefinitely and may be redistributed consistent with - this project or the open source license(s) involved. - -then you just add a line saying:: - - Signed-off-by: Random J Developer <random(a)developer.example.org> - -IRC Channel: ``#ebbr`` on ofct - -.. _DCO: https://developercertificate.org/ -.. _boot-architecture: https://lists.linaro.org/mailman/listinfo/boot-architecture -.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture - Writers Guide ============= diff --git a/source/ebbr.rst b/source/ebbr.rst index 414e3af..4269b49 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -1,12 +1,12 @@ .. EBBR Source Document - Copyright Arm Ltd. 2018 + Copyright Arm Limited, 2018 SPDX-License-Identifier: CC-BY-SA-4.0 #################################################### Embedded Base Boot Requirements (EBBR) Specification #################################################### -Copyright © 2017-2018 Arm Ltd and Contributors. +Copyright © 2017-2018 Arm Limited and Contributors. This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License. To view a copy of this license, visit -- 2.13.0

7 years, 2 months

2
1
0 0

[PATCH 2/2] Add PDF output

by Grant Likely

Use Sphinx-doc to generate PDF output from the source text. With Sphinx installed, a PDF version of the document can be generated by typing: 'make latexpdf' Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- .gitignore | 1 + Makefile | 20 +++++++ README.rst | 56 +++++++++++++++++++ source/conf.py | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ source/ebbr.rst | 22 ++++++-- 5 files changed, 259 insertions(+), 3 deletions(-) create mode 100644 .gitignore create mode 100644 Makefile create mode 100644 source/conf.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..796b96d --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/build diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..91bb4be --- /dev/null +++ b/Makefile @@ -0,0 +1,20 @@ +# Minimal makefile for Sphinx documentation +# + +# You can set these variables from the command line. +SPHINXOPTS = +SPHINXBUILD = sphinx-build +SPHINXPROJ = EBBR +SOURCEDIR = source +BUILDDIR = build + +# Put it first so that "make" without argument is like "make help". +help: + @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) + +.PHONY: help Makefile + +# Catch-all target: route all unknown targets to Sphinx using the new +# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS). +%: Makefile + @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) \ No newline at end of file diff --git a/README.rst b/README.rst index 1babcf4..57fac8f 100644 --- a/README.rst +++ b/README.rst @@ -13,6 +13,62 @@ expected in September 2018. You can find the current draft text in this repository, but be aware that everything in the draft text is subject to change before an official v1.0 release is published. +Build Instructions +================== + +Requirements +^^^^^^^^^^^^ + +* Sphinx version 1.5 or later: http://sphinx-doc.org/contents.html +* LaTeX (and pdflatex, and various LaTeX packages) + +On Debian and Ubuntu +^^^^^^^^^^^^^^^^^^^^ +:: + + # apt-get install python-sphinx texlive texlive-latex-extra libalgorithm-diff-perl \ + texlive-humanities texlive-generic-recommended texlive-generic-extra + +If the version of python-sphinx installed is too old, then an additional +new version can be installed with the Python package installer:: + + $ apt-get install python-pip + $ pip install --user --upgrade Sphinx + $ export SPHINXBUILD=~/.local/bin/sphinx-build + +Export SPHINXBUILD (see above) if Sphinx was installed with pip --user, then follow Make commands below + +On Mac OS X +^^^^^^^^^^^ + +* Install MacTeX_ +* Install pip if you do not have it:: + + $ sudo easy_install pip + +* Install Sphinx:: + + $ pip install --user --upgrade Sphinx + +.. _MacTeX: http://tug.org/mactex + +Make Targets +^^^^^^^^^^^^ + +To generate PDF:: + + $ make latexpdf + +To generate hierarchy of HTML pages:: + + $ make html + +To generate a single HTML page:: + + $ make singlehtml + +Output goes in `./build` subdirectory. + License ======= diff --git a/source/conf.py b/source/conf.py new file mode 100644 index 0000000..fd4267b --- /dev/null +++ b/source/conf.py @@ -0,0 +1,163 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +# +# EBBR specification build configuration file, created by +# sphinx-quickstart on Thu May 10 18:49:38 2018. +# +# This file is execfile()d with the current directory set to its +# containing dir. +# +# Note that not all possible configuration values are present in this +# autogenerated file. +# +# All configuration values have a default; values that are commented out +# serve to show the default. + +# If extensions (or modules to document with autodoc) are in another directory, +# add these directories to sys.path here. If the directory is relative to the +# documentation root, use os.path.abspath to make it absolute, like shown here. +# +# import os +# import sys +# sys.path.insert(0, os.path.abspath('.')) + +import subprocess + +# -- General configuration ------------------------------------------------ + +# If your documentation needs a minimal Sphinx version, state it here. +# +# needs_sphinx = '1.0' + +# Add any Sphinx extension module names here, as strings. They can be +# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom +# ones. +extensions = ['sphinx.ext.todo', + 'sphinx.ext.githubpages'] + +# Add any paths that contain templates here, relative to this directory. +templates_path = ['_templates'] + +# The suffix(es) of source filenames. +# You can specify multiple suffix as a list of string: +# +# source_suffix = ['.rst', '.md'] +source_suffix = '.rst' + +# The master toctree document. +master_doc = 'ebbr' + +# General information about the project. +project = 'Embedded Base Boot Requirements (EBBR) Specification' +copyright = '2018 Arm, Ltd. and Contributors' +author = 'Arm, Ltd. and Contributors' + +# The version info for the project you're documenting, acts as replacement for +# |version| and |release|, also used in various other places throughout the +# built documents. +# +# The short X.Y version. +try: + version = str(subprocess.check_output(["git", "describe", "--dirty"]), 'utf-8').strip() +except: + version = "unknown-rev" +# The full version, including alpha/beta/rc tags. +release = version + +# The language for content autogenerated by Sphinx. Refer to documentation +# for a list of supported languages. +# +# This is also used if you do content translation via gettext catalogs. +# Usually you set "language" from the command line for these cases. +language = None + +# List of patterns, relative to source directory, that match files and +# directories to ignore when looking for source files. +# This patterns also effect to html_static_path and html_extra_path +exclude_patterns = [] + +# The name of the Pygments (syntax highlighting) style to use. +pygments_style = 'sphinx' + +# If true, `todo` and `todoList` produce output, else they produce nothing. +todo_include_todos = True + + +# -- Options for HTML output ---------------------------------------------- + +# The theme to use for HTML and HTML Help pages. See the documentation for +# a list of builtin themes. +# +html_theme = 'alabaster' + +# Theme options are theme-specific and customize the look and feel of a theme +# further. For a list of options available for each theme, see the +# documentation. +# +# html_theme_options = {} + +# Add any paths that contain custom static files (such as style sheets) here, +# relative to this directory. They are copied after the builtin static files, +# so a file named "default.css" will overwrite the builtin "default.css". +html_static_path = ['_static'] + + +# -- Options for HTMLHelp output ------------------------------------------ + +# Output file base name for HTML help builder. +htmlhelp_basename = 'EBBRdoc' + + +# -- Options for LaTeX output --------------------------------------------- + +latex_elements = { + # The paper size ('letterpaper' or 'a4paper'). + # + 'papersize': 'a4paper', + + # The font size ('10pt', '11pt' or '12pt'). + # + # 'pointsize': '10pt', + + # Additional stuff for the LaTeX preamble. + # + # 'preamble': '', + + # Latex figure (float) alignment + # + # 'figure_align': 'htbp', +} + +# Release numbers with a qualifier (ex. '-rc', '-pre') get a watermark. +if '-' in release: + latex_elements['preamble'] = '\\usepackage{draftwatermark}\\SetWatermarkScale{.45}\\SetWatermarkText{%s}' % (release) + +# Grouping the document tree into LaTeX files. List of tuples +# (source start file, target name, title, +# author, documentclass [howto, manual, or own class]). +latex_documents = [ + (master_doc, 'EBBR.tex', project, author, 'manual'), +] + + +# -- Options for manual page output --------------------------------------- + +# One entry per manual page. List of tuples +# (source start file, name, description, authors, manual section). +man_pages = [ + (master_doc, 'ebbr', project, [author], 1) +] + + +# -- Options for Texinfo output ------------------------------------------- + +# Grouping the document tree into Texinfo files. List of tuples +# (source start file, target name, title, author, +# dir menu entry, description, category) +texinfo_documents = [ + (master_doc, 'EBBR', project, author, 'EBBR', + 'One line description of project.', 'Miscellaneous'), +] + + + diff --git a/source/ebbr.rst b/source/ebbr.rst index be51f90..414e3af 100644 --- a/source/ebbr.rst +++ b/source/ebbr.rst @@ -2,8 +2,24 @@ Copyright Arm Ltd. 2018 SPDX-License-Identifier: CC-BY-SA-4.0 +#################################################### +Embedded Base Boot Requirements (EBBR) Specification +#################################################### + +Copyright © 2017-2018 Arm Ltd and Contributors. + +This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 +International License. To view a copy of this license, visit +http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to +Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. + +.. image:: https://i.creativecommons.org/l/by-sa/4.0/88x31.png + :target: http://creativecommons.org/licenses/by-sa/4.0/ + :alt: Creative Commons License + :align: right + ******************* -ABOUT THIS DOCUMENT +About This Document ******************* Introduction @@ -439,7 +455,7 @@ APPENDIX D - Optional UEFI Protocols ******************************************* Basic Networking Support -==================== +======================== ============================================ ====== Service UEFI § @@ -453,7 +469,7 @@ EFI_MANAGED_NETWORK_SERVICE_BINDING_PROTOCOL 25.1 networking. Network Boot Protocols -==================== +====================== ========================================== ====== Service UEFI § -- 2.13.0

7 years, 2 months

2
2
0 0

[RFC PATCH] driver core: make deferring probe forever optional

by Rob Herring

Deferred probe will currently wait forever on dependent devices to probe, but sometimes a driver will never exist. It's also not always critical for a driver to exist. Platforms can rely on default configuration from the bootloader or reset defaults for things such as pinctrl and power domains. This is often the case with initial platform support until various drivers get enabled. There's at least 2 scenarios where deferred probe can render a platform broken. Both involve using a DT which has more devices and dependencies than the kernel supports. The 1st case is a driver may be disabled in the kernel config. The 2nd case is the kernel version may simply not have the dependent driver. This can happen if using a newer DT (provided by firmware perhaps) with a stable kernel version. Unfortunately, this change breaks with modules as we have no way of knowing when modules are done loading. One possibility is to make this opt in or out based on compatible strings rather than at a subsystem level. Ideally this information could be extracted automatically somehow. OTOH, maybe the lists are pretty small. There's only a handful of subsystems that can be optional, and then only so many drivers in those that can be modules (at least for pinctrl, many drivers are built-in only). Cc: Alexander Graf <agraf(a)suse.de> Signed-off-by: Rob Herring <robh(a)kernel.org> --- This patch came out of a discussion on the ARM boot-architecture list[1] about DT forwards and backwards compatibility issues. There are issues with newer DTs breaking on older, stable kernels. Some of these are difficult to solve, but cases of optional devices not having kernel support should be solvable. I tested this on a RPi3 B with the pinctrl driver forced off. With this change, the MMC/SD and UART drivers can function without the pinctrl driver. Rob [1] https://lists.linaro.org/pipermail/boot-architecture/2018-April/000466.html drivers/base/dd.c | 16 ++++++++++++++++ drivers/pinctrl/devicetree.c | 2 +- include/linux/device.h | 2 ++ 3 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index c9f54089429b..5848808b9d7a 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -226,6 +226,15 @@ void device_unblock_probing(void) driver_deferred_probe_trigger(); } + +int driver_deferred_probe_optional(void) +{ + if (initcalls_done) + return -ENODEV; + + return -EPROBE_DEFER; +} + /** * deferred_probe_initcall() - Enable probing of deferred devices * @@ -240,6 +249,13 @@ static int deferred_probe_initcall(void) /* Sort as many dependencies as possible before exiting initcalls */ flush_work(&deferred_probe_work); initcalls_done = true; + + /* + * Trigger deferred probe again, this time we won't defer anything + * that is optional + */ + driver_deferred_probe_trigger(); + flush_work(&deferred_probe_work); return 0; } late_initcall(deferred_probe_initcall); diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c index b601039d6c69..096e52a5c506 100644 --- a/drivers/pinctrl/devicetree.c +++ b/drivers/pinctrl/devicetree.c @@ -120,7 +120,7 @@ static int dt_to_map_one_config(struct pinctrl *p, np_config); of_node_put(np_pctldev); /* OK let's just assume this will appear later then */ - return -EPROBE_DEFER; + return driver_deferred_probe_optional(); } /* If we're creating a hog we can use the passed pctldev */ if (pctldev && (np_pctldev == p->dev->of_node)) diff --git a/include/linux/device.h b/include/linux/device.h index 0059b99e1f25..8de920442bc1 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -332,6 +332,8 @@ struct device *driver_find_device(struct device_driver *drv, struct device *start, void *data, int (*match)(struct device *dev, void *data)); +int driver_deferred_probe_optional(void); + /** * struct subsys_interface - interfaces to device functions * @name: name of the device function -- 2.17.0

7 years, 2 months

7
14
0 0

EBBR issues moved to github

by Grant Likely

I've started tracking EBBR issues in github, so I will no longer track them in the weekly meeting notes document. Please go take a look. Feel free to add issues for things that need to be done, or comment on the items that are there. Better yet, write patches to fix the existing issues! ;-) https://github.com/ARM-software/ebbr/issues Cheers, g. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 2 months

1
0
0 0

[PATCH 1/2] Elaborate on DCO process and add full text of CC-BY-SA 4.0

by Grant Likely

Replace the LICENSE file with the full text of CC-BY-SA 4.0 License into the LICENSE file, and move the DCO description into the README. The LICENSE file is a verbatim copy of: https://creativecommons.org/licenses/by-sa/4.0/legalcode.txt Signed-off-by: Grant Likely <grant.likely(a)arm.com> --- LICENSE | 428 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ LICENSE.rst | 50 ------- README.rst | 75 ++++++++--- 3 files changed, 488 insertions(+), 65 deletions(-) create mode 100644 LICENSE delete mode 100644 LICENSE.rst diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..fe8dbc5 --- /dev/null +++ b/LICENSE @@ -0,0 +1,428 @@ +Attribution-ShareAlike 4.0 International + +======================================================================= + +Creative Commons Corporation ("Creative Commons") is not a law firm and +does not provide legal services or legal advice. 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Except for the limited purpose of indicating that +material is shared under a Creative Commons public license or as +otherwise permitted by the Creative Commons policies published at +creativecommons.org/policies, Creative Commons does not authorize the +use of the trademark "Creative Commons" or any other trademark or logo +of Creative Commons without its prior written consent including, +without limitation, in connection with any unauthorized modifications +to any of its public licenses or any other arrangements, +understandings, or agreements concerning use of licensed material. For +the avoidance of doubt, this paragraph does not form part of the +public licenses. + +Creative Commons may be contacted at creativecommons.org. + diff --git a/LICENSE.rst b/LICENSE.rst deleted file mode 100644 index 78313a4..0000000 --- a/LICENSE.rst +++ /dev/null @@ -1,50 +0,0 @@ -Creative Commons Attribution-ShareAlike 4.0 -=========================================== -:: - - This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 - International License. To view a copy of this license, visit - http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to - Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. - -Developer Certificate of Origin -=============================== -:: - - Developer Certificate of Origin - Version 1.1 - - Copyright (C) 2004, 2006 The Linux Foundation and its contributors. - 1 Letterman Drive - Suite D4700 - San Francisco, CA, 94129 - - Everyone is permitted to copy and distribute verbatim copies of this - license document, but changing it is not allowed. - - - Developer's Certificate of Origin 1.1 - - By making a contribution to this project, I certify that: - - (a) The contribution was created in whole or in part by me and I - have the right to submit it under the open source license - indicated in the file; or - - (b) The contribution is based upon previous work that, to the best - of my knowledge, is covered under an appropriate open source - license and I have the right under that license to submit that - work with modifications, whether created in whole or in part - by me, under the same open source license (unless I am - permitted to submit under a different license), as indicated - in the file; or - - (c) The contribution was provided directly to me by some other - person who certified (a), (b) or (c) and I have not modified - it. - - (d) I understand and agree that this project and the contribution - are public and that a record of the contribution (including all - personal information I submit with it, including my sign-off) is - maintained indefinitely and may be redistributed consistent with - this project or the open source license(s) involved. diff --git a/README.rst b/README.rst index 84aeb0a..1babcf4 100644 --- a/README.rst +++ b/README.rst @@ -13,11 +13,21 @@ expected in September 2018. You can find the current draft text in this repository, but be aware that everything in the draft text is subject to change before an official v1.0 release is published. -The documentation in this project is provided under the terms of the -Creative Commons Attribution Share-Alike License. -Licensing details can be found in the LICENSE.rst_ file. +License +======= -.. _LICENSE.rst: ./LICENSE.rst +This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 +International License. To view a copy of this license, visit +http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to +Creative Commons, PO Box 1866, Mountain View, CA 94042, USA. + +A copy of the license is included in the LICENSE_ file. + +.. image:: https://i.creativecommons.org/l/by-sa/4.0/88x31.png + :target: http://creativecommons.org/licenses/by-sa/4.0/ + :alt: Creative Commons License + +.. _LICENSE: ./LICENSE Contributing ============ @@ -25,29 +35,64 @@ Contributing Master copy of this project is hosted on GitHub: https://github.com/ARM-software/ebbr -Anyone may contribute to EBBR. Contributions must be made with a -Developer Certificate of Origin (DCO_) attestation that the contribution -confirms to the license of the project. The attestation is made by the -developer including a ``Signed-off-by: <email-address>`` tag in the -commit text of the contribution. - -EBBR discussion is on the boot-architecture_ and arm.ebbr-discuss mailing lists. -The 'official' list is arm.ebbr-discuss, but the list archives are not yet public, -so boot-architecture_ is being used to keep everything in the open. +Anyone may contribute to the EBBR project. EBBR discussion uses the +boot-architecture_ and arm.ebbr-discuss mailing lists. +The 'official' list is arm.ebbr-discuss, but the list archives are not +yet public, so boot-architecture_ is being used to keep everything in +the open. * boot-architechture(a)lists.linaro.org * arm.ebbr-discuss(a)arm.com -Past discussions can be found in the _boot-architecture-archive. +Past discussions can be found in the boot-architecture-archive_. + +To help track the origin of contributions, this project uses the same +DCO_ "sign-off" process as used by the Linux kernel. +The sign-off is a simple line at the end of the explanation for the +patch, which certifies that you wrote it or otherwise have the right to +pass it on as an open-source patch. The rules are pretty simple: if you +can certify the below: + +Developer's Certificate of Origin 1.1 +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +By making a contribution to this project, I certify that: + + (a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + + (b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + + (c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + + (d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. + +then you just add a line saying:: + + Signed-off-by: Random J Developer <random(a)developer.example.org> IRC Channel: ``#ebbr`` on ofct .. _DCO: https://developercertificate.org/ .. _boot-architecture: https://lists.linaro.org/mailman/listinfo/boot-architecture -.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture/ +.. _boot-architecture-archive: https://lists.linaro.org/pipermail/boot-architecture Writers Guide ============= + All documentation in this repository uses reStructuredText_ markup with Sphinx_ extensions. -- 2.13.0

7 years, 2 months

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EBBR repo created

by Grant Likely

Hi folks, Internal approval for EBBR has come through and we now have a GitHub repo. It's empty at the moment, but I'll be pushing the current EBBR text there shortly once I've fixed the license text. License will be CC-BY-SA https://github.com/ARM-software/ebbr We can start using this page to track issue. I'll put all the active action items into github issues. Cheers, g. IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

7 years, 2 months

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Re: [Arm.ebbr-discuss] Booting from eMMC without the boot protocol

by William Mills

[explicitly cc'ing boot-arch to see if this solves the TI auth problems] On 05/04/2018 11:45 AM, Alexander Graf wrote: > On 05/04/2018 04:56 PM, Grant Likely wrote: >> On 04/05/2018 15:46, Grant Likely wrote: >>> On 03/05/2018 09:43, Daniel Thompson wrote: >>>> On Wed, May 02, 2018 at 06:09:15PM -0400, Tom Rini wrote: >>>>> On Wed, May 02, 2018 at 10:48:11PM +0100, Grant Likely wrote: >>>>>> On 02/05/2018 22:24, Tom Rini wrote: >>>>>>> On Wed, May 02, 2018 at 08:40:42PM +0100, Daniel Thompson wrote: >>>>>>>> >>>>>>>> In terms of the restrictions that come from EBBR mandating GPT: >>>>>>> >>>>>>> Can we step back, why is EBBR mandating GPT? >>>>>> >>>>>> I think EBBR should recommend GPT, but allow MBR if the SoC boot >>>>>> masked >>>>>> rom conflicts with GPT. >>>>>> >>>>>> In the early days of GPT there was also a hybrid GPT+MBR scheme that >>>>>> could list the boot partition in the MBR, but still have a full >>>>>> GPT. It >>>>>> isn't pretty, but there is precidence. >>>>> >>>>> How about recommends GPT but allows MBR, no qualifiers. As you note >>>>> there's a lot of ways to fiddle around and make it work, probably, on >>>>> all of the existing SoCs that do magic offsets. But it's a lot easier >>>>> to just allow MBR (what the SoCs were designed to have to live >>>>> with) and >>>>> guide line that in this case nothing before the first 2MiB be used by >>>>> the OS. With a few more spec words around all of that so it's nice >>>>> and >>>>> formal :) >>>> >>>> I'm OK to allow MBR. >>>> >>>> I'd be inclined to require that protective partitions be used to defend >>>> the first 2MB though. They are more flexible and are a useful hint to >>>> anyone trying to manually partition. >>>> >>>> >>>> In a different mail Tom wrote: >>>>> And I agree with the high level idea of needing to do something to >>>>> protect systems with a magic in-use spot. >>>> >>>> There are a couple of extra details. >>>> >>>> 1. We can't allocate a GUID to discourage an automatic partitioner >>>> from harming a protected partition. We only have the 8-bit >>>> partition type. >>>> Some potential candidates could be 0xA2 (which Altera appear use >>>> for a similar purpose), 0xE7 (wikipedia does not report existing >>>> uses) or 0xF0 (PA-RISC Linux boot loader). >>>> >>>> 2. Boot ROMs that have built-in support for FAT could be hard coded to >>>> require a specific partition type. > >>>> I think we don't need to worry about #2 to much: systems with built-in >>>> MBR/FAT parsing can use hybrid MBR/GPT to communicate to distros >>>> which partitions are protected because (presumably) they allow >>>> flexibility in placing the first sector of the FAT partition. >>> >>> Can we start a list of SoCs that have special requirements on the >>> boot eMMC/SD/USB? It would be useful to see the cross-section of >>> requirements. >>> >>> I've created a wiki page to start capturing data. From their we can >>> decide what scenarios the spec needs to cover. >>> >>> https://github.com/glikely/ebbr-for-discussion/wiki/Boot-Media-Behaviour >> >> One more thought, are there many new SoCs still using hard coded >> offsets instead of an MBR or GPT? It may be that there aren't enough >> left for us to care about for EBBR level 0. In which case EBBR Level 0 >> should support both MBR and GPT (non-hybrid), and then narrow to GPT >> only in a future revision. > > I don't think we'll be able to move away from MBR anytime soon. For a > quick glimpse on what SoCs need to have blobs installed where, take a > look at our image creation script: > > https://build.opensuse.org/package/view_file/openSUSE:Factory:ARM:Live/JeOS… > > > There you can see that we force to MBR (for various reasons) on: > > * RPi (reads MBR) > * i.MX 5x/6 (SPL at sector 2) > * Exynos 4/5 (SPL is in sector 1, not sure about newer ones) > * AM905 (SPL in sector 1) > * Kirkwood (SPL in sector 1) > * Zynq(MP) (convenient to store boot.bin on FAT partition in MBR) > > I think we should simply dictate that EBBR compliant OSs do not start > any partitions before a sane boundary (1MB? 2MB?). IIRC most > partitioning tools these days won't start partitions before 1MB anyway, > so if we declare 1MB a safe bound we essentially have no work to do. > > I did skim (not study) the script. Looks like a good resource of current board info. I see you are using raw mode for many boards. I am missing something. If there is only MBR and no GPT then there is no GUID type for EFI Partition. So how does the firmware find the "EFI Partition" and the default /efi/boot/boot*.efi file? Does it just use the partition with boot flag?

7 years, 2 months

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Re: [Arm.ebbr-discuss] Booting from eMMC without the boot protocol

by Grant Likely

On 04/05/2018 16:00, Tom Rini wrote: > On Fri, May 04, 2018 at 03:46:52PM +0100, Grant Likely wrote: [...] >> Can we start a list of SoCs that have special requirements on the boot >> eMMC/SD/USB? It would be useful to see the cross-section of requirements. >> >> I've created a wiki page to start capturing data. From their we can >> decide what scenarios the spec needs to cover. >> >> https://github.com/glikely/ebbr-for-discussion/wiki/Boot-Media-Behaviour > > I'm not sure if there's a button somewhere to allow more widely used > editing of the wiki part of github. Maybe rename it to something like > notes/ in the ebbr-for-discussion repo itself so the usual PR workflow > is available? Thanks! Done: https://github.com/glikely/ebbr-for-discussion/blob/master/soc-boot-behavio… g.

7 years, 2 months

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ebbr: boot behaviour without persistent variables

by Leif Lindholm

I took an action last week to provide a block of text for how platforms without persistent variable storage should behave. Here's my opening play: Boot manager behaviour without persistent variable store ======================================================= Platforms that do not implement persistent variable storage must support the Removable Media Boot Behaviour as described by UEFI. Such platforms can additionally implement support for additional statically[1] defined images to be processed as SysPrep####, Driver#### and Boot### global variable entries. If present, these entries will be processed in the order specified by corresponding statically defined SysPrepOrder, DriverOrder and BootOrder global variables. Any images referred to by such variables must reside in a vendor-specific subdirectory on the EFI System Partition, as recorded in http://uefi.org/registry. /BOOT must not be used except where explicitly permitted by UEFI. Where an executable is present in the prescribed Removable Media location, boot of that must be attempted, and only after this fails should any of the Boot#### entries be processed. Statically configured BootNext, OsRecovery#### or PlatformRecovery#### entries must not be used. [1] This is worth discussing, but if we were to support dynamic creation of these, we need _very_ strict rules around it.

7 years, 2 months

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Re: [RFC PATCH] driver core: make deferring probe forever optional

by Rob Herring

On Fri, May 4, 2018 at 8:25 PM, Mark Brown <broonie(a)kernel.org> wrote: > On Wed, May 02, 2018 at 07:49:57PM +0100, Robin Murphy wrote: > >> I guess there's also the possibility that a single driver may want multiple >> behaviours, if e.g. if SoC variants A and B have some identical peripherals >> but slightly different pinctrl/IOMMU/etc. hardware such that A has workable >> default behaviour and can be treated as optional, whereas B absolutely must >> be controlled by the kernel for the consumers to function properly, and they >> *should* defer forever otherwise. I think that would pretty much demand some >> sort of explicitly-curated white/blacklist setup at the subsystem or driver >> level. > > Different board variants, and possibly even different bootloaders might > also be an issue here - a vendor bootloader might do pinmuxing that an > upstream bootloader doesn't for example. In some cases the pinmuxing > even depends on the boot method with things only getting configured if > the bootloader wanted to use them. I think this is going to be too big of a hammer for pinctrl at least. My current thought is to define a pinctrl DT property to indicate pins are configured already which the OS can use to decide if pinctrl is optional or not. I'd prefer to keep it simple and be a per pin controller flag even though this is quite possibly a per client or pin group state (as you say, the bootloader may only configure what it uses). Making this per pin group could be a lot of nodes and difficult to really get right without testing. Making it per pin controller could make drivers fail in less predictable ways if their pins are not configured. Rob

7 years, 2 months

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Re: [Arm.ebbr-discuss] Booting from eMMC without the boot protocol

by Leif Lindholm

(Whoops, boot-architecture wasn't on cc on this thread, forwarding message there for public archiving. Please add arm.ebbr-discuss to cc on any replies.) On Wed, May 02, 2018 at 06:09:15PM -0400, Tom Rini wrote: > On Wed, May 02, 2018 at 10:48:11PM +0100, Grant Likely wrote: > > On 02/05/2018 22:24, Tom Rini wrote: > > >On Wed, May 02, 2018 at 08:40:42PM +0100, Daniel Thompson wrote: > > >> > > >>In terms of the restrictions that come from EBBR mandating GPT: > > > > > >Can we step back, why is EBBR mandating GPT? > > > > I think EBBR should recommend GPT, but allow MBR if the SoC boot masked > > rom conflicts with GPT. > > > > In the early days of GPT there was also a hybrid GPT+MBR scheme that > > could list the boot partition in the MBR, but still have a full GPT. It > > isn't pretty, but there is precidence. > > How about recommends GPT but allows MBR, no qualifiers. So, first of all - a level 0 EBBR _must_ permit MBR, since many SoCs already out there have ROMs that load firmware. Secondly, I don't know if should be within the scope of EBBR to mandate anything at all about a partitioning scheme that is not within the control of the firmware. It could mandate support in the _firmware_ for GPT partitioning. But that is already mandated by UEFI (as well as support for MBR and El Torito). But I would really like to see some note and explanation of restrictions placed on operating systems (i.e., the consumers of the guarantees provided by the document) by such behaviour in the EBBR. > As you note > there's a lot of ways to fiddle around and make it work, probably, on > all of the existing SoCs that do magic offsets. But it's a lot easier > to just allow MBR (what the SoCs were designed to have to live with) and > guide line that in this case nothing before the first 2MiB be used by > the OS. With a few more spec words around all of that so it's nice and > formal :) And if there is a corresponding EBSA coming, I would _really_ like to see some compliance level banning the reservation of LBA1-LBA33 and (-LBA1)-(-LBA33) for boot ROM use on any general-purpose block storage. Clearly not level 0, though. / Leif

7 years, 2 months

1
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DT handling, [Ref Linux-Efi]

by Udit Kumar

Hi There is bit of discussion on linux-efi too , to handle DT update I guess some members of this forum are active there too. https://www.spinics.net/lists/linux-efi/msg13700.html To summaries 1/ Ownership of DTB IMO should be firmware and we should retain this ownership in EBBR as well, Any objections/thoughts ? Update 1/ Updating whole device tree from OS [Capsule update can be used ] 2/ Just modifying the device tree DTBO My preferred way to handle DTBO in firmware will be https://source.android.com/devices/architecture/dto/multiple See picture Runtime DTO implementation for multiple DTs To store this information in partition, options we have 1/ Run time variables 2/ Some driver in Linux writing to DTBO partition 3/ Some other way ?? I am not sure, if distro are updating device tree which is default shipped with board ?? Thanks Udit

7 years, 2 months

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Re: [Arm.ebbr-discuss] DT handling, [Ref Linux-Efi]

by Daniel Thompson

On Wed, May 02, 2018 at 05:39:02PM -0400, Tom Rini wrote: > On Wed, May 02, 2018 at 05:12:03AM +0000, Chang, Abner (HPS SW/FW Technologist) wrote: > > > > -----Original Message----- > > > From: Udit Kumar [mailto:udit.kumar@nxp.com] > > > Sent: Wednesday, May 02, 2018 12:26 PM > > > To: Chang, Abner (HPS SW/FW Technologist) <abner.chang(a)hpe.com>; > > > Alexander Graf <agraf(a)suse.de>; William Mills <wmills(a)ti.com> > > > Cc: boot-architecture(a)lists.linaro.org; nd(a)arm.com; Rod Dorris > > > <rod.dorris(a)nxp.com>; arm.ebbr-discuss(a)arm.com > > > Subject: RE: DT handling, [Ref Linux-Efi] > > > > > > > We probably don't need to provide a genetic DT driver in UEFI U-Boot, > > > > instead, we will have to mention how SoC/platform vendors publish > > > > DTB/DTBO in EBBR spec. > > > > For example, > > > > The EFI_CONFIGURATION_TABLE in EFI System table could be used to > > > > publish the pointer to DTB and DTBO. Declare two GUIDs in EBBR, one > > > > for DTB another for DTBO. OS boot loader is responsible to merge > > > > DTB/DTBO according DTB/DTBO discovered in EFI Configuration Table. To > > > > read DT from EFI variable into memory, memory map to DT in EEPROM or > > > > other mechanisms is platform implementation. No matter which approach, > > > > DT producer has to create configuration table in EFI system table > > > > follow the data structure defined in EBBR. > > > > Another way instead of using GUID in configuration table is to publish > > > > DTB/DTBO in EFI device path, this way is more UEFI oriented IMO. > > > > However, we have to defined corresponding device path node in UEFI > > > > spec for DT. Similar to using system configuration table. DT producer > > > > has to install EFI device path for either DTB or DTBO. Then OS boot > > > > loaders locate those EFI device paths of DTB and DTBO and merge it. > > > > > > We are adding a requirement on OS boot loaders to merge it. > > > IMO, merging should be done by firmware itself. > > > In case, we want to host multiple distribution at same time, then this is likely > > > to go with OS boot loaders > > > > That is fine to merge DT by firmware, we still can standardize how > > UBoot merges DT in EBBR. For example, SoC and other platform UBoot > > drivers produce their DT or DTO in their own drivers. UBoot provides a > > centralized EFI DT driver to collect DT/DTO from either EFI system > > configuration table or EFI device path. Then this centralized EFI DT > > driver produces the pointer to point to final DT in EFI system > > configuration table. OS boot loader cab just check EFI system > > configuration table to retrieve DT, something like this. > > I think I need to step in here to clarify something. U-Boot drivers > don't produce a DT and while it's possible, it's generally[1] not done, > that U-Boot uses _the_ device tree that we pass along to the next stage > (we've likely filtered things out for space and added a few specific > things of our own). > > IMHO, what EBBR should cover is saying that firmware may apply overlays > because we know there's N valid use cases of taking a base and fixing it > up in both big and small ways. Then firmware will pass along to the > next stage (EFI application such as GRUB or *BSD loader or a Linux > Kernel or ...). Which bits of this discussion target level 0 and which target a later level 1? Personally I'm not sure there is enough prior art w.r.t. device tree overlay for anything much related to overlays to target level 0. In fact if we take the view that EBBR defines a contract between the system firmware and the OS then arguably DT update is also out of scope unless we are defining runtime services by which the OS can update the DT. Again not something I think is ready for level 0. To be clear I don't dispute that good system firmware should make DT update easy, simply that I'm not sure how it fits into EBBR. Daniel.

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