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

Re: Linaro-open-discussions Digest, Vol 19, Issue 1

by Joyce Qi

Hi Jonathon，Lorenzo， Do we have some topic to discuss for the Linaro-open-disscussions next week? Thanks:) Joyce > 在 2022年4月14日，上午8:00，linaro-open-discussions-request@op-lists.linaro.org 写道： > > 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: LOD Call notes: 22 March 2022 - vCPU Hotplug Update > (Jonathan Cameron) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 13 Apr 2022 19:17:32 +0100 > From: Jonathan Cameron <Jonathan.Cameron(a)Huawei.com> > Subject: [Linaro-open-discussions] Re: LOD Call notes: 22 March 2022 - > vCPU Hotplug Update > To: Ilkka Koskinen <ilkka(a)os.amperecomputing.com> > Cc: linaro-open-discussions(a)op-lists.linaro.org > Message-ID: <20220413191732.00000e4e(a)Huawei.com> > Content-Type: text/plain; charset="US-ASCII" > > On Thu, 31 Mar 2022 11:47:26 -0700 (PDT) > Ilkka Koskinen <ilkka(a)os.amperecomputing.com> wrote: > >> Hi everyone, >> >> On Tue, 22 Mar 2022, Jonathan Cameron via Linaro-open-discussions wrote: >>> Hi All, >>> >>> A quick set of notes on the discussion on vCPU hotplug. >>> >>> Great to have Ed join the discussion. If we are going to >>> have further calls on this topic we may want to move the time to be >>> more friendly for the US. >>> >>> Current status >>> * ACPI spec change via code first route approved. >>> * Kernel patches being reworked / rebased by ARM. Expected to be sent >>> out in 5.19 cycle. >>> * QEMU patches being updated by Huawei. Will do at least some light testing >>> and then push out a public git tree so that others can test - will aim >>> to do this so it aligns with kernel code availability. >>> * Ed (Ampere) gave an update to say they are interested in pushing this >>> forwards ASAP and have customer / OS vendor engagement which will be >>> very useful in moving towards a complete solution, particularly ensuring >>> good test coverage etc. >>> >>> Noted that current QEMU patches may not cover all corner cases, for example >>> live migration of VMs that have vCPUs hotplugged. Might 'just work' >>> but we haven't tested it yet so probably not. >>> >>> Given we didn't really add anything on DOE / SPDM over previous calls, >>> I don't plan to send out anything on that topic this time. >>> >>> Thanks to Joyce for hosting the call. If I noted down anything wrong, >>> or incomplete let the list know. >>> >>> Jonathan >>> -- >>> Linaro-open-discussions mailing list -- linaro-open-discussions(a)op-lists.linaro.org >>> https://collaborate.linaro.org/display/LOD/Linaro+Open+Discussions+Home >> >> Thanks for the great meeting and the update! As Ed mentioned (and you >> wrote above), we're interested in joining the vCPU Hotplug development. > > Hi Ilkka > > Great to have you on board for this. > > Status wise, on QEMU side we have the new interface up and running > (it was a whole 2 lines of code once we'd dealt with some rebasing related issues). > > Rather more changes were needed to make it work sensibly on top of Gavin Shan's > QEMU topology configuration patch set. > https://lore.kernel.org/qemu-devel/20220403145953.10522-1-gshan@redhat.com/ > The code going through some light internal review before we put it up somewhere > public. Note it's definitely not production quality code but it is somewhere > to start from. Given Easter related vacations I doubt we'll get enough > eyes on it until next week. > > We were thrown briefly by the fact there is a recently added > apcica/actbl2.h entry for MADT_ONLINE_CAPABLE but it's a different bit. > Seems x86 folk wanted something similar last year. We'll have to do something > ugly in ACPICA to mangle the name for the new bit to avoid that collision. > Lorenzo, I'm assuming the ACPCIA one line patch to add that define is > something the ARM team will deal with? > > There are some known limitations though that we'll need to sort out before > upstreaming the QEMU support. One of which is SVE currently breaks things. > Plenty of time though as kernel needs to be upstream first anyway. > > Testing wise we are using QEMU on top of QEMU so we can poke corners of the > architecture don't have hardware for (e.g. SVE :). Even on a rubbish x86 > desktop it's not that slow :) > > Lorenzo, any update on kernel side of things or expected time scale for > more information? > > Obviously we have some hacked patches based on Salil's original proposal > that sanity check the QEMU side of things but I suspect the final version > will look rather different :) > > One question on the spec change for Lorenzo. It's not entirely clear > but I think we should not be using _MAT when 'hotplugging' the vCPUs? > For now the QEMU code provides the relevant entries anyway but > it would be nice to drop that if not necessary (it's not a huge > amount of code or complexity though so not a big thing either way). > > Thanks and an early happy Easter to those celebrating on Sunday. > > Jonathan > >> >> Br, Ilkka > > > ------------------------------ > > 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 19, Issue 1 > ******************************************************

2 years, 5 months

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Linaro OP-TEE Contributions (LOC) monthly meeting - June 23 CANCELLED

by Jens Wiklander

Hi, We don't have any topics for the meeting this month. Hence cancelling. Regards, Jens on behalf of OP-TEE team

2 years, 6 months

1
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Linaro OP-TEE Contribution (LOC) monthly meeting April 2022

by Ruchika Gupta

Hi, OP-TEE Contributions (LOC) monthly meeting is planned for Thursday April 28 @17.00 (UTC + 2). We have following on the agenda - Fault Mitigation patterns in OP-TEE - Jens Wiklander If you have any more topics you'd like to discuss, please let us know and we can schedule them. Meeting details: --------------- Date/time: April 28(a)17.00 (UTC + 2) https://everytimezone.com/s/700b9d66 Connection details: https://www.trustedfirmware.org/meetings/ Meeting notes: http://bit.ly/loc-notes Regards, Ruchika on behalf of the Linaro OP-TEE team

2 years, 8 months

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LOD call notes 26 April.

by Jonathan Cameron

Hi, This is a combination of yangyicong and my notes. If we missed anything please point it out. RMR: - (Shameer) Request to look at Patch 4 as some changes from earlier versions. Warning fix for next version. - Lorenzo will check with Robin. - Need to ask Joerg to pull the series. vCPU HP. - https://gitlab.com/jic23/qemu/-/commits/vcpu-poc-1 - Kernel Patches - hopefully posted soon. Not Lorenzo as not available for a few months. - _MAT needed or not. SPDM - Random discussion of the difficulty of debugging the rather complex exchanges. Nothing worth noting. Scheduler: Yangyicong's slides provide a good summary of the question. - Observed that any topology based estimate is going to be challenging! - Vincent - set migration cost per sched domain level? - Dietmar - workloads weren't clear in original thread. Question of taskhot or new Idle Balance as relevant to workload. Tighter description of what is going on in the benchmarks needed. - Vincent - Uarch + cache etc relevant. - Hesham - potentially user perf counters to get some more info. Takeways 1. Need to figure out the underlying reason of the performance variation of certain benchmark: If it's because of task hotness or newidle_balance(), etc. 2. Effect may related to the micro-arch, cache, and task's states. Also can be tuned according to the cpu numbers and scheduler domain levels. 3. Can be get from some firmware reports, to avoid the long time measurement in booting. 4. May be possible to calibrate during the boot time, but narrow the scope of measured CPUs and test time. This won't take long, but is susceptible to noise from other sources. 5. Hardware counters or profilings help understand what is going on, but unlikely to be consistently available for use in the loop. 6. Maybe make migration cost per sched domain on implementation. Thanks, Jonathan

2 years, 8 months

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LOD Call notes: 22 March 2022 - vCPU Hotplug Update

by Jonathan Cameron

Hi All, A quick set of notes on the discussion on vCPU hotplug. Great to have Ed join the discussion. If we are going to have further calls on this topic we may want to move the time to be more friendly for the US. Current status * ACPI spec change via code first route approved. * Kernel patches being reworked / rebased by ARM. Expected to be sent out in 5.19 cycle. * QEMU patches being updated by Huawei. Will do at least some light testing and then push out a public git tree so that others can test - will aim to do this so it aligns with kernel code availability. * Ed (Ampere) gave an update to say they are interested in pushing this forwards ASAP and have customer / OS vendor engagement which will be very useful in moving towards a complete solution, particularly ensuring good test coverage etc. Noted that current QEMU patches may not cover all corner cases, for example live migration of VMs that have vCPUs hotplugged. Might 'just work' but we haven't tested it yet so probably not. Given we didn't really add anything on DOE / SPDM over previous calls, I don't plan to send out anything on that topic this time. Thanks to Joyce for hosting the call. If I noted down anything wrong, or incomplete let the list know. Jonathan

2 years, 8 months

2
2
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Invitation: Bigtop and OpenEuler @ Tue Mar 29, 2022 10am - 10:50am (CST) (linaro-open-discussions@op-lists.linaro.org)

by guodong.xu＠linaro.org

You have been invited to the following event. Title: Bigtop and OpenEuler Hi, All I would like to start a discussion about adding OpenEuler [1] into the supported platforms of Bigtop [2]. Persons or associations who are interested and would like to cooperate are warmly welcome to join. As this is the first meeting on this, let's limit our discussion in the following two: 1. OpenEuler's current status and acceptance level by the community of Arm Servers. 2. From a technical viewpoint, what is required for adding a new platform into Bigtop's supporting list. PS: [1] OpenEuler: openEuler is an open source, free Linux distribution platform. The platform provides an open community for global developers. OpenEuler is an open source project incubated and operated by the OpenAtom Foundation. https://www.openeuler.org/en/ [2] Bigtop: Bigtop support many Operating Systems, including Debian, Ubuntu, CentOS, Fedora, openSUSE and many others. https://bigtop.apache.org/ Thanks. Best regards, Guodong Xu When: Tue Mar 29, 2022 10am – 10:50am China Standard Time - Shanghai Where: zoom meeting Joining info: Join Zoom Meeting https://linaro-org.zoom.us/j/97870076880 (ID: 97870076880) Join by phone (US) +1 877-853-5247 Joining instructions: https://www.google.com/url?q=https://applications.zoom.us/addon/invitation/… Joining notes: ------------Zoom for G Suite Add-On Help------------Meeting host: guodong.xu(a)linaro.org Calendar: linaro-open-discussions(a)op-lists.linaro.org Who: * guodong.xu(a)linaro.org - organizer * linaro-open-discussions(a)op-lists.linaro.org Attachments: * Notes - Bigtop and OpenEuler - https://docs.google.com/document/d/1eNdYcVAe5n_22gq9n4B56kBw8M7AZEXr8Y3hFLa… Event details: https://calendar.google.com/calendar/event?action=VIEW&eid=MmViMTZpZ2g3cTk0… Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this courtesy email at the account linaro-open-discussions(a)op-lists.linaro.org because you are an attendee of this event. To stop receiving future updates for this event, decline this event. Alternatively you can sign up for a Google account at https://calendar.google.com/calendar/ and control your notification settings for your entire calendar. Forwarding this invitation could allow any recipient to send a response to the organizer and be added to the guest list, or invite others regardless of their own invitation status, or to modify your RSVP. Learn more at https://support.google.com/calendar/answer/37135#forwarding

2 years, 9 months

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Linaro OP-TEE Contributions (LOC) monthly meeting - Mar 24 CANCELLED

by Ruchika Gupta

Hi, We don't have any topics for the meeting this month. Hence cancelling. Following topics related to OP-TEE will be presented in Linaro Connect Tech Day : Core Technologies <https://www.linaro.org/events/linaro-connect-tech-day-core-technologies/> on March 29. Feel free to join us there. - OP-TEE and FF-A evolution - OP-TEE Lightning Talk Regards, Ruchika (on behalf of OP-TEE team)

2 years, 9 months

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LOD Call notes: March 22nd 2022 - IORT RMR

by Lorenzo Pieralisi

Hi all, thanks for hosting this call today, some notes on the IORT RMR discussion: - Patchset requiring a final review from ARM (upcoming) but should be ready to be merged - Handling of IO port access at 0x0 on !x86 to be fixed (caused by UEFI allocating addresses starting at 0x0 for BARs and IORT RMR requiring the OS to preserve the BAR value) in Linux but it does not affect the upstreaming of patches (since the only platform where the issue triggers does not have upstream IORT RMR tables) - ACPICA pull request still not merged but on its way - Targeting v5.19 kernel (probably via ACPI tree to avoid Linux ACPICA dependencies) - Repost of final version at v5.18-rc1 Thank you very much Joyce for hosting the call and for any questions please reach out. Lorenzo

2 years, 9 months

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Re: Invitation: Linaro Open Discussions @ Tue 25 Jan 2022 12pm - 1pm (CET) (jonathan.cameron@huawei.com)

by Shameerali Kolothum Thodi

> -----Original Message----- > From: Shameerali Kolothum Thodi > Sent: 25 January 2022 13:14 > To: Jonathan Cameron <jonathan.cameron(a)huawei.com>; joyce.qi(a)linaro.org; > Mike Holmes <mike.holmes(a)linaro.org>; lorenzo.pieralisi(a)arm.com; > james.morse(a)arm.com; Linuxarm <linuxarm(a)huawei.com> > Subject: RE: Invitation: Linaro Open Discussions @ Tue 25 Jan 2022 12pm - > 1pm (CET) (jonathan.cameron(a)huawei.com) > > > > > -----Original Message----- > > From: Jonathan Cameron > > Sent: 25 January 2022 12:03 > > To: joyce.qi(a)linaro.org; Mike Holmes <mike.holmes(a)linaro.org>; > > lorenzo.pieralisi(a)arm.com; james.morse(a)arm.com; Linuxarm > > <linuxarm(a)huawei.com>; Shameerali Kolothum Thodi > > <shameerali.kolothum.thodi(a)huawei.com> > > Subject: RE: Invitation: Linaro Open Discussions @ Tue 25 Jan 2022 > > 12pm - 1pm (CET) (jonathan.cameron(a)huawei.com) > > > > Some brief notes on the call. Feel free to point out what I noted down > wrong. > > > > Action items (AI) marked and approximate assignment in brackets. > > Thanks to Joyce for hosting the call. As ever, very helpful to have this forum. > > For future calls, topic requester to list who from Linaro engineering > > teams might be interested to make sure we keep them in the loop. > > > > Present, > > ARM: Lorenzo Pieralisi, James Morse > > Linaro: Joyce Qi > > Huawei: Shameerali Kolothum, Jonathan Cameron > > > > Next scheduled call in 1 month. Additional calls as necessary to push > > forwards topics.. > > > > RMR progress. > > -------------------- > > ACPICA / IORT spec issue due to lack of backwards compatibility. AI > > (LP) to investigate. > > Hi Lorenzo, > > This is the initial implementation of ACPICA changes w.r.t revision E.c. > > https://github.com/shamiali2008/acpica/commit/49ad1b2ec572e3e70557e4 > 4e2255c497b2639cbe > > For now, I am checking the RMR node revision and limit the support to only >= > 2. Hi Lorenzo, Please let me know if there is any update on this... We need to get the ACPCIA changes in for the kernel support ASAP. If you are Ok with the above patch I can send a pull request for the same. Thanks, Shameer

2 years, 9 months

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Linaro OP-TEE Contribution (LOC) monthly meeting Feb 2022

by Ruchika Gupta

Hi, OP-TEE Contributions (LOC) monthly meeting is planned for Thursday Feb 24 @16.00 (UTC). We have following on the agenda - SDP DT Configuration, Olivier Masse, NXP If you have any more topics you'd like to discuss, please let us know and we can schedule them. Meeting details: --------------- Date/time: Feb 24(a)16.00 (UTC) https://everytimezone.com/s/fef76b1b Connection details: https://www.trustedfirmware.org/meetings/ Meeting notes: http://bit.ly/loc-notes Regards, Ruchika on behalf of the Linaro OP-TEE team

2 years, 10 months

1
1
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