Linaro-open-discussions July 2025

linaro-open-discussions@op-lists.linaro.org

4 participants
2 discussions

Re: Linaro-open-discussions Digest, Vol 54, Issue 4

by Joyce Qi

Hi Jonathan，all Are there any items that need to sync during next Tue's LOD meeting？ Thanks Joyce > On 26 Mar 2025, at 08:00, linaro-open-discussions-request(a)op-lists.linaro.org wrote: > > Send Linaro-open-discussions mailing list submissions to > linaro-open-discussions(a)op-lists.linaro.org > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > linaro-open-discussions-request(a)op-lists.linaro.org > > You can reach the person managing the list at > linaro-open-discussions-owner(a)op-lists.linaro.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Linaro-open-discussions digest..." > > Today's Topics: > > 1. About the Device tree handling multiple threads in ARM cpu node LOD discussion(Linaro Open Discussion) > (Joyce Qi) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 25 Mar 2025 19:24:43 +0800 > From: Joyce Qi <joyce.qi(a)linaro.org> > Subject: [Linaro-open-discussions] About the Device tree handling > multiple threads in ARM cpu node LOD discussion(Linaro Open > Discussion) > To: Jonathan Cameron <jonathan.cameron(a)huawei.com> > Cc: Joyce Qi <joyce.qi(a)linaro.org>, > linaro-open-discussions(a)op-lists.linaro.org, Lorenzo Pieralisi > <lorenzo.pieralisi(a)linaro.org>, James Morse <james.morse(a)arm.com>, Rob > Herring <robh(a)kernel.org>, Mark Rutland <mark.rutland(a)arm.com>, > Alireza Sanaee <alireza.sanaee(a)huawei.com> > Message-ID: <EB0D6409-56E1-4749-9BCA-26D207EB5DE7(a)linaro.org> > Content-Type: text/plain; charset=utf-8 > > Hi Mark, Rob, > > https://lore.kernel.org/linux-arm-kernel/20250110161057.445-1-alireza.sanae… to the LoD discussion email list! > Maybe you have missed the formal email since the title is not so clear:) > > Jonathan from Huawei wants to sync the about how to do device tree representation of multi thread cores and resulting shared L1 caches > In this email list. > > Can we discuss here to have a unified solution? > > > https://lore.kernel.org/linux-arm-kernel/20250110161057.445-1-alireza.sanae… > > > Great thanks:) > Joyce > > > > >> On 21 Feb 2025, at 18:07, Jonathan Cameron <jonathan.cameron(a)huawei.com> wrote: >> >> >> Hi Joyce, >> >> I'll be in Shenzhen next week but should be able to dial in subject to >> overcoming a slightly different network. >> >> If we can poke the following disconnect that would be very helpful >> - if it happens on list rather than needing to be discussed on the call >> that's absolutely fine. >> >> It's a difference of opinion between Mark Rutland and Rob Herring >> (both ARM) about how to do device tree representation of multi thread >> cores and resulting shared L1 caches. We mostly care about this because >> we'd like to maintain same level of support in QEMU for ACPI (which has >> always handled this case) and DT. >> >> This was try number 1 based on advice from Rob was to use multiple reg >> entries in a single cpu node (how the DT spec currently specifies it >> based on ancient power PC roots) >> >> https://lore.kernel.org/linux-arm-kernel/20250110161057.445-1-alireza.sanae… >> Mark suggested that we just do out of CPU node description as is done for every >> other level of cache because of the complexity of phandles pointing to the >> node. >> >> Proposal of out of CPU node description. Rob not happy with this one. >> https://lore.kernel.org/all/20250129164855.676-1-alireza.sanaee@huawei.com/ >> https://lore.kernel.org/all/20250203120527.3534-1-alireza.sanaee@huawei.com/ >> >> Whilst I'm fairly sure Mark's concerns about references to the CPU node can >> be resolved with a few minor tweaks (a few properties may become arrays that >> are index rather than single element) we'd really like to have the two >> experts engaged in the same thread as so far it's been a case of alternate >> responses. >> >> The other topic that is in my pile is the cache flushing by PA range work. >> I'm going to be working with our HQ team to ensure the design we put out >> for that is general enough over the next 2 weeks so we should have something >> to share after that. The remaining questions prior to posting an RFC are >> all low level detail things that I don't think would benefit from a discussion >> until we've shown the code. >> >> Final potential topic is MPAM. Particularly if there is anything specific >> we can do to help with upstreaming. >> >> Jonathan >> >> >> Joyce Qi <joyce.qi(a)linaro.org> wrote: >> >>> Hi Jonathan, all, >>> >>> Happy New Year to all! >>> >>> Do we have any topic to sync next week? >>> >>> Thanks:) >>> Joyce >>> >>> >>> >>> >>>> On 27 Nov 2024, at 08:00, linaro-open-discussions-request(a)op-lists.linaro.org wrote: >>>> >>>> Send Linaro-open-discussions mailing list submissions to >>>> linaro-open-discussions(a)op-lists.linaro.org >>>> >>>> To subscribe or unsubscribe via email, send a message with subject or >>>> body 'help' to >>>> linaro-open-discussions-request(a)op-lists.linaro.org >>>> >>>> You can reach the person managing the list at >>>> linaro-open-discussions-owner(a)op-lists.linaro.org >>>> >>>> When replying, please edit your Subject line so it is more specific >>>> than "Re: Contents of Linaro-open-discussions digest..." >>>> >>>> Today's Topics: >>>> >>>> 1. Re: Flush by PA range Designs. (was Re: Linaro-open-discussions Digest, Vol 38, Issue 14) >>>> (Joyce Qi) >>>> >>>> >>>> ---------------------------------------------------------------------- >>>> >>>> Message: 1 >>>> Date: Tue, 26 Nov 2024 18:36:22 +0800 >>>> From: Joyce Qi <joyce.qi(a)linaro.org> >>>> Subject: [Linaro-open-discussions] Re: Flush by PA range Designs. >>>> (was Re: Linaro-open-discussions Digest, Vol 38, Issue 14) >>>> To: James Morse <james.morse(a)arm.com> >>>> Cc: Jonathan Cameron <Jonathan.Cameron(a)Huawei.com>, James Morse via >>>> Linaro-open-discussions <linaro-open-discussions(a)op-lists.linaro.org>, >>>> linuxarm(a)huawei.com, zengheng4(a)huawei.com, wangyushan12(a)huawei.com, >>>> Dave Martin <Dave.Martin(a)arm.com> >>>> Message-ID: <5BF890F5-CE52-4682-AFE6-9FBDE56F2247(a)linaro.org> >>>> Content-Type: text/plain; charset=utf-8 >>>> >>>> Hi all， >>>> >>>> Will cancel today’s meeting since no special topic today, welcome to contact with when needed. >>>> >>>> Thanks >>>> Joyce >>>> >>>>> On 25 Nov 2024, at 21:01, Joyce Qi <joyce.qi(a)linaro.org> wrote: >>>>> >>>>> Hi Jonathan， >>>>> >>>>> Would you like to continue the MPAM， Flush by PA range Designs or any other topics during tomorrow’s LOD meeting？ >>>>> >>>>> Thanks >>>>> Joyce >>>>> >>>>> >>>>>> On 24 Oct 2024, at 00:14, James Morse <james.morse(a)arm.com> wrote: >>>>>> >>>>>> Hi guys, >>>>>> >>>>>> (CC: +Dave Martin) >>>>>> >>>>>> On 10/21/24 15:01, Joyce Qi wrote: >>>>>>>> On 21 Oct 2024, at 20:50, James Morse <james.morse(a)arm.com> wrote: >>>>>>>> On 21/10/2024 11:00, Joyce Qi via Linaro-open-discussions wrote: >>>>>>>>> Thanks a lot for the detailed description and document sharing. >>>>>>>>> I have uploaded the MPAM materials to the LOD Confluence. >>>>>>>>> >>>>>>>>> https://linaro.atlassian.net/wiki/spaces/LOD/overview >>>>>> >>>>>>>>> Are you available to join tomorrow’s LoD meeting for the MPAM topics ? >>>>>> >>>>>> The code already published for something like the intPARTID proposal is here: >>>>>> https://git.gitlab.arm.com/linux-arm/linux-dm/-/commits/mpam/partid-pmg-rem… >>>>>> >>>>>> The aim was to keep it within the MPAM driver, initially based on some static configuration to prove >>>>>> its useful before making it more dynamic, probably a mount option. >>>>>> >>>>>> >>>>>> Thanks, >>>>>> >>>>>> James >>>>> >>>> >>>> >>>> ------------------------------ >>>> >>>> Subject: Digest Footer >>>> >>>> Linaro-open-discussions mailing list -- linaro-open-discussions(a)op-lists.linaro.org >>>> To unsubscribe send an email to linaro-open-discussions-leave(a)op-lists.linaro.org >>>> >>>> >>>> ------------------------------ >>>> >>>> End of Linaro-open-discussions Digest, Vol 50, Issue 1 >>>> ****************************************************** >>> >> > > > ------------------------------ > > Subject: Digest Footer > > Linaro-open-discussions mailing list -- linaro-open-discussions(a)op-lists.linaro.org > To unsubscribe send an email to linaro-open-discussions-leave(a)op-lists.linaro.org > > > ------------------------------ > > End of Linaro-open-discussions Digest, Vol 54, Issue 4 > ******************************************************

3 weeks, 6 days

Canceled Linaro OP-TEE Contribution, LOC, monthly meeting June 22

by Jens Wiklander

Hi, The LOC meeting in June is cancelled due to summer vacations. See you in August. Thanks, Jens

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Linaro-open-discussions July 2025