Hi,
One more topic, NMI. Any updates from ARM side on when we can expect some progress on that support? Some of our colleagues had been looking at specific refactors needed and we don't want to duplicate if things are well in hand in the Arm team.
Thanks,
Jonathan
On Tue, 22 Jul 2025 18:38:43 +0800 Joyce Qi joyce.qi@linaro.org wrote:
Hi all
Cancelled today’s meeting since no feedback from James.
Thanks:) Joyce
On 22 Jul 2025, at 10:04, Joyce Qi joyce.qi@linaro.org wrote:
Hi Jonathan，
Thanks for the topics：）
Hi James，
Any call needed for Jonathan’s topic 2/3？
Thanks Joyce
On 21 Jul 2025, at 23:34, Jonathan Cameron Jonathan.Cameron@huawei.com wrote:
Hi Joyce, All,
There are various things underway, but I'm not sure if a call is necessary.
- Cache flushing for CXL etc. I need to address the feedback on the first version.
Mostly restructuring and moving the code rather than anything fundamental. The ACPI bit has received no feedback, so I'll carry it for now as a second example but not going to do any work on standards part. Perhaps better if James (and anyone else) waits for next version.
- MPAM. Great to see the RFC posted. Any specific things we can help
with (beyond the obvious review and testing!)?
- Caches in SMT DT lack of alignment between Rob Herring and Mark Rutland.
If you can poke them James, that would be great. Rob reviewed the precursor but Ali is still sitting on two completing solutions.
Perhaps others have topics that are more useful to discuss.
Jonathan
On Mon, 21 Jul 2025 22:43:09 +0800 Joyce Qi joyce.qi@linaro.org wrote:
Hi Jonathan，all，
Any topic we need to talk tomorrow in the LOD meeting？
Thanks Joyce
On 24 Jun 2025, at 16:40, Jonathan Cameron jonathan.cameron@huawei.com wrote:
Sorry, meant to get back to you yesterday after syncing with a few internal teams. Nothing is ready for discussion this time so cancelling indeed the right choice!
-----Original Message----- From: Joyce Qi joyce.qi@linaro.org Sent: 21 June 2025 08:29 To: Jonathan Cameron jonathan.cameron@huawei.com Cc: linaro-open-discussions@op-lists.linaro.org; James Morse james.morse@arm.com Subject: Re: Linaro-open-discussions Digest, Vol 54, Issue 4
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@op-lists.linaro.org wrote:
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Today's Topics:
- 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@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@huawei.com Cc: Joyce Qi joyce.qi@linaro.org, linaro-open-discussions@op-lists.linaro.org, Lorenzo Pieralisi lorenzo.pieralisi@linaro.org, James Morse james.morse@arm.com, Rob Herring robh@kernel.org, Mark Rutland mark.rutland@arm.com, Alireza Sanaee alireza.sanaee@huawei.com Message-ID: EB0D6409-56E1-4749-9BCA-26D207EB5DE7@linaro.org Content-Type: text/plain; charset=utf-8
Hi Mark, Rob,
https://lore.kernel.org/linux-arm-kernel/20250110161057.445-1-alireza.sanaee... 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. sanaee@huawei.com/#t
Great thanks:) Joyce
> On 21 Feb 2025, at 18:07, Jonathan Cameron jonathan.cameron@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 > .sanaee@huawei.com/#t 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@huawe > i.com/ > https://lore.kernel.org/all/20250203120527.3534-1-alireza.sanaee@huaw > ei.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@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@op-lists.linaro.org wrote: >>> >>> Send Linaro-open-discussions mailing list submissions to >>> linaro-open-discussions@op-lists.linaro.org >>> >>> To subscribe or unsubscribe via email, send a message with subject >>> or body 'help' to >>> linaro-open-discussions-request@op-lists.linaro.org >>> >>> You can reach the person managing the list at >>> linaro-open-discussions-owner@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@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@arm.com >>> Cc: Jonathan Cameron Jonathan.Cameron@Huawei.com, James Morse via >>> Linaro-open-discussions linaro-open-discussions@op-lists.linaro.org, >>> linuxarm@huawei.com, zengheng4@huawei.com, wangyushan12@huawei.com, >>> Dave Martin Dave.Martin@arm.com >>> Message-ID: 5BF890F5-CE52-4682-AFE6-9FBDE56F2247@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@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@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@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/part >>>>> id-pmg-remap/v0.2/head/?ref_type=heads >>>>> >>>>> 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@op-lists.linaro.org >>> To unsubscribe send an email to >>> linaro-open-discussions-leave@op-lists.linaro.org >>> >>> >>> ------------------------------ >>> >>> End of Linaro-open-discussions Digest, Vol 50, Issue 1 >>> ****************************************************** >> >
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