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Notes (brief) from System DT call: OpenAMP bindings

by Tomas Evensen

Here are some brief notes from the meeting. If nothing else as a showcase on how much we miss Nathalie when she is on vacation 😉 Krzysztof Kepa – GE Mathieu Poirier – Linaro Etsam Anjum – Mentor Anrnoud Pouliquen – ST Loic Pallardy - ST Suman Anna - TI Dan Milea – Wind River Mark Dapoz – Wind River Tomas Evensen – Xilinx Stefano Stabellini – Xilinx Bruce Ashfield – Xilinx Ed Mooring – Xilinx Ben Levinsky - Xilinx Stefano went through slides. Overall idea: 1. Specify remoteproc channels with minimal information in System-DT in a way that is as common as possible for all vendors. In particular, we are avoiding to have to specify the same memory regions in more than one place. A resource group is specially marked to contain most information. 2. Use Lopper to create the vendor specific remoteproc specification Generating reserved-memory, etc. information that has duplicate information. For the time being, no plans to unify the vendor specific information that goes into the traditional device tree for Linux 3. Later (or in parallel), but without making it a gating item, start discussions on what we can do to unify the vendor specific information in the traditional DT Discussion about how TI and ST might generate their specific information from this specification. Stefano to send out examples and slides. Ben: Xilinx backend to Lopper is upstreamed and available as an example. Might change as upstreaming continues. Question: * How do we configure VirtIO? From: nathalie(a)xilinx.com When: 8:00 AM - 9:00 AM August 31, 2020 Subject: [System-dt] System DT call: OpenAMP bindings Location: webex CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. Hi all, The OpenAMP-remoteproc working group is looking forward to discuss OpenAMP bindings with the System DT working group & all others interested in System DT. Best regards, Nathalie C. Chan King Choy Program Manager focused on Open Source & Community Meeting number (access code): 145 853 2028 Meeting password: NgTwf4r8R$3 Monday, August 31, 2020 8:00 am | (UTC-07:00) Pacific Time (US & Canada) | 1 hr Join meeting<https://xilinx.webex.com/xilinx/j.php?MTID=mcd4ad9bca009dfef38671c26d5a1d301> Canada toll free 1-844-426-4405 France toll free 0800-912-485 India toll free 000-800-040-1016 Sweden toll free 020-033-6721 UK toll free 08000315372 United States Toll Free 1-844-621-3956 Global call-in numbers<https://xilinx.webex.com/xilinx/globalcallin.php?MTID=m370fae0984a8792a3592…> | Toll-free calling restrictions<https://www.webex.com/pdf/tollfree_restrictions.pdf> This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.

6 years

[PATCH] EBBR: ResetSystem has return type void

by Heinrich Schuchardt

Closes: #50 ResetSystem() has return type void. So it cannot return EFI_UNSUPPORTED. Signed-off-by: Heinrich Schuchardt <xypron.glpk(a)gmx.de> --- source/chapter2-uefi.rst | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/source/chapter2-uefi.rst b/source/chapter2-uefi.rst index 2add2de..74ef70e 100644 --- a/source/chapter2-uefi.rst +++ b/source/chapter2-uefi.rst @@ -209,9 +209,10 @@ ResetSystem() is required to be implemented in boot services, but it is optional for runtime services. During runtime services, the operating system should first attempt to use ResetSystem() to reset the system. -If firmware doesn't support ResetSystem() during runtime services, -then the call will immediately return EFI_UNSUPPORTED, and the OS should -fall back to an architecture or platform specific reset mechanism. + +If firmware doesn't support ResetSystem() during runtime services, then the call +will immediately return, and the OS should fall back to an architecture or +platform specific reset mechanism. On AArch64 platforms implementing [PSCI]_, if ResetSystem() is not implemented then the Operating System should fall -- 2.28.0

6 years

Re: [System-dt] Notes (brief) from System DT call: OpenAMP bindings

by Stefano Stabellini

On Mon, 31 Aug 2020, Bjorn Andersson via System-dt wrote: > On Mon 31 Aug 16:04 UTC 2020, Tomas Evensen via System-dt wrote: > > > Here are some brief notes from the meeting. > > > > If nothing else as a showcase on how much we miss Nathalie when she is on vacation ???? > > > > Krzysztof Kepa – GE > > Mathieu Poirier – Linaro > > Etsam Anjum – Mentor > > Anrnoud Pouliquen – ST > > Loic Pallardy - ST > > Suman Anna - TI > > Dan Milea – Wind River > > Mark Dapoz – Wind River > > Tomas Evensen – Xilinx > > Stefano Stabellini – Xilinx > > Bruce Ashfield – Xilinx > > Ed Mooring – Xilinx > > Ben Levinsky - Xilinx > > > > Stefano went through slides. > > Overall idea: > > > > 1. Specify remoteproc channels with minimal information in System-DT in a way that is as common as possible for all vendors. > > In particular, we are avoiding to have to specify the same memory regions in more than one place. A resource group is specially marked to contain most information. > > 2. Use Lopper to create the vendor specific remoteproc specification > > Generating reserved-memory, etc. information that has duplicate information. > > For the time being, no plans to unify the vendor specific information that goes into the traditional device tree for Linux > > 3. Later (or in parallel), but without making it a gating item, start discussions on what we can do to unify the vendor specific information in the traditional DT > > Can anyone point me to some examples of vendor specific information > referred to here? Some of the other attendees might have better examples than this. The ones I was mentioning this morning are the "mboxes" and "mbox-names" properties you can see in the "output.txt" example. Also the memory regions listed under the "memory-region" property and under "reserved-memory".

6 years

Re: [System-dt] Notes (brief) from System DT call: OpenAMP bindings

by Stefano Stabellini

On Mon, 31 Aug 2020, Tomas Evensen via System-dt wrote: > Stefano to send out examples and slides I am attaching the slides and examples, where: - input.txt is the system device tree snippet, input to lopper - output.txt is the traditional device tree snipper, output from lopper

6 years

Re: [System-dt] Notes (brief) from System DT call: OpenAMP bindings

by Bjorn Andersson

On Mon 31 Aug 16:04 UTC 2020, Tomas Evensen via System-dt wrote: > Here are some brief notes from the meeting. > > If nothing else as a showcase on how much we miss Nathalie when she is on vacation ???? > > Krzysztof Kepa – GE > Mathieu Poirier – Linaro > Etsam Anjum – Mentor > Anrnoud Pouliquen – ST > Loic Pallardy - ST > Suman Anna - TI > Dan Milea – Wind River > Mark Dapoz – Wind River > Tomas Evensen – Xilinx > Stefano Stabellini – Xilinx > Bruce Ashfield – Xilinx > Ed Mooring – Xilinx > Ben Levinsky - Xilinx > > Stefano went through slides. > Overall idea: > > 1. Specify remoteproc channels with minimal information in System-DT in a way that is as common as possible for all vendors. > In particular, we are avoiding to have to specify the same memory regions in more than one place. A resource group is specially marked to contain most information. > 2. Use Lopper to create the vendor specific remoteproc specification > Generating reserved-memory, etc. information that has duplicate information. > For the time being, no plans to unify the vendor specific information that goes into the traditional device tree for Linux > 3. Later (or in parallel), but without making it a gating item, start discussions on what we can do to unify the vendor specific information in the traditional DT Can anyone point me to some examples of vendor specific information referred to here? Regards, Bjorn > > Discussion about how TI and ST might generate their specific information from this specification. > > Stefano to send out examples and slides. > Ben: Xilinx backend to Lopper is upstreamed and available as an example. Might change as upstreaming continues. > > Question: > * How do we configure VirtIO? > > > > From: nathalie(a)xilinx.com > When: 8:00 AM - 9:00 AM August 31, 2020 > Subject: [System-dt] System DT call: OpenAMP bindings > Location: webex > > > CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. > > Hi all, > > The OpenAMP-remoteproc working group is looking forward to discuss OpenAMP bindings with the System DT working group & all others interested in System DT. > > Best regards, > > Nathalie C. Chan King Choy > Program Manager focused on Open Source & Community > > Meeting number (access code): 145 853 2028 > > Meeting password: NgTwf4r8R$3 > > > > Monday, August 31, 2020 > 8:00 am | (UTC-07:00) Pacific Time (US & Canada) | 1 hr > > > > Join meeting<https://xilinx.webex.com/xilinx/j.php?MTID=mcd4ad9bca009dfef38671c26d5a1d301> > > > > Canada toll free 1-844-426-4405 > France toll free 0800-912-485 > India toll free 000-800-040-1016 > Sweden toll free 020-033-6721 > UK toll free 08000315372 > United States Toll Free 1-844-621-3956 > > Global call-in numbers<https://xilinx.webex.com/xilinx/globalcallin.php?MTID=m370fae0984a8792a3592…> | Toll-free calling restrictions<https://www.webex.com/pdf/tollfree_restrictions.pdf> > This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. > -- > System-dt mailing list > System-dt(a)lists.openampproject.org > https://lists.openampproject.org/mailman/listinfo/system-dt

6 years

DTE call this Wednesday

by François Ozog

Hi, This Wednesday agenda is: - Presentation of RiscV DT by Atish Patra - Proposal of DT authentication/identification/format PoC by Joakim/FF Cordially, FF

6 years

Restarting EBBR biweekly meetings

by Grant Likely

It has been a long time since there has been a regular EBBR review meeting, and with the amount of activity that has happened in the last year I think it is time to start meeting again. I'd like to start talking about content for EBBR v1.0+. A biweekly cadence seems about right to me, but we can discuss when we start meetings again. Would Monday, 31 Aug at 16:00BST, 08:00PST work? Email me privately if you want me to send you a calendar invite. Discussion topics: - EBBR testing progress - EBBR Scope -- doing a better job to describe the purpose of EBBR - Tightening requirements as U-Boot implementation matures (make fewer things optional) - Security requirements - Secure boot and secure capsule update - issue review - Signing requirements on dtbs and variables Send me an email if you want to add to the agenda, or add an issue to the github page: https://github.com/arm-software/ebbr/issues g. ---- Time: Every second Monday starting 31 Aug at 16:00BST, 08:00PST Join Zoom Meeting https://armltd.zoom.us/j/92081365511?pwd=SFZpRitXUEp3Zy9GM0h3UUZ1b1pnUT09 Meeting ID: 920 8136 5511 Password: 490324 One tap mobile +14086380968,,92081365511#,,#,490324# US (San Jose) +16465189805,,92081365511#,,#,490324# US (New York) Dial by your location +1 408 638 0968 US (San Jose) +1 646 518 9805 US (New York) +1 346 248 7799 US (Houston) Meeting ID: 920 8136 5511 Password: 490324 Find your local number: https://armltd.zoom.us/u/adYiWaDyys 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.

6 years

Trusting DT

by François Ozog

Hi, I just updated the technical report <https://docs.google.com/document/d/1CLkhLRaz_zcCq44DLGmPZQFPbYHOC6nzPowaL0X…> with a section on "Trusting DT" that is the result of my analysis of the discussion we had (not what I presented). Please comment, correct, update... Cordially, FF -- François-Frédéric Ozog | *Director Linaro Edge & Fog Computing Group* T: +33.67221.6485 francois.ozog(a)linaro.org | Skype: ffozog

6 years

System DT call: OpenAMP bindings

by Nathalie Chan King Choy

Hi all, The OpenAMP-remoteproc working group is looking forward to discuss OpenAMP bindings with the System DT working group & all others interested in System DT. Best regards, Nathalie C. Chan King Choy Program Manager focused on Open Source & Community Meeting number (access code): 145 853 2028 Meeting password: NgTwf4r8R$3 Monday, August 31, 2020 8:00 am | (UTC-07:00) Pacific Time (US & Canada) | 1 hr Join meeting<https://xilinx.webex.com/xilinx/j.php?MTID=mcd4ad9bca009dfef38671c26d5a1d301> Canada toll free 1-844-426-4405 France toll free 0800-912-485 India toll free 000-800-040-1016 Sweden toll free 020-033-6721 UK toll free 08000315372 United States Toll Free 1-844-621-3956 Global call-in numbers<https://xilinx.webex.com/xilinx/globalcallin.php?MTID=m370fae0984a8792a3592…> | Toll-free calling restrictions<https://www.webex.com/pdf/tollfree_restrictions.pdf>

6 years

Adding RISC-V to EBBR

by Atish Patra

Hi All, We are interested in adopting EBBR as the boot specification for the embedded RISC-V platforms. We firmly believe that EBBR is a very well defined specification for boot requirement and there is no need for reinventing the wheel for RISC-V. Hence, this is a thread to discuss all the requirements for adding RISC-V to EBBR. Here is my current understanding. Please correct me if I am wrong. Logistic Requirement: 1. As per the contribution guidelines[1], patches should be sent to boot-architecture(a)lists.linaro.org. and the specification will be hosted under "ARM-software" Github. I am hoping that introducing RISC-V related changes are okay with the current maintainers. 2. The specification is licensed under Creative Commons. The RISC-V related changes will refer to some of the RISC-V specifications as well. AFAIK, there shouldn't be an issue with that. 3. It should be okay to add other copyrights in addition to "Arm Limited and Contributors". Technical Requirement: 1. Software status: a. UEFI support for RISC-V Linux kernel is already available in the mailing list[2]. The targeted upstream merge is the 5.10 merge window. b. U-Boot already supports UEFI for RISC-V. c. EDK2 upstreaming is currently under progress [3] as well. Is it okay to start sending patches for EBBR RISC-V related changes now or do we need to wait for EDK2 and Linux kernel patches to be available upstream ? 2. RISC-V related sections in EBBR a. UEFI: Currently, RISC-V doesn't support a EFI_RESET_SYSTEM boot service as firmware doesn't have a standard way to reset the system. There is a proposal to add a system reset function to Supervisor Binary Specification(SBI) which can be mapped to EFI_RESET_SYSTEM by the firmware. Apart from that, I believe RISC-V supports all UEFI boot and run time services mandated by EBBR. Is it a blocker for RISC-V EBBR compatibility? b. RISC-V Multiprocessor Startup Protocol: This section will contain the details of booting protocol for RISC-V and mandatory RISC-V specifications that need to be implemented. c. Firmware Storage: AFAIK, RISC-V platforms are already compatible with this. Please let me know if I missed something or oversimplified any requirement. We want to make RISC-V compatible with EBBR sooner than later and ready work on any missing pieces if any. [1] https://github.com/ARM-software/ebbr/blob/master/CONTRIBUTING.rst [2] https://lkml.org/lkml/2020/8/19/1252 [3] https://edk2.groups.io/g/devel/message/63831?p=,,,20,0,0,0::Created,,RISC-V… [4] https://lists.riscv.org/g/tech-unixplatformspec/message/49?p=,,,20,0,0,0::r… -- Regards, Atish

6 years

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