- TF-A - lists.trustedfirmware.org

Canceled event with note: TF-A Tech Forum @ Thu Dec 25, 2025 5pm - 6pm (GMT+1) (tf-a@lists.trustedfirmware.org)

by Olivier Deprez

This event has been canceled with a note: "No TF-A Tech forum on Dec 25th." TF-A Tech Forum Thursday Dec 25, 2025 ⋅ 5pm – 6pm Central European Time - Paris Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34.1Meeting ID: 935 5786 3987Passcode: 939141---One tap mobile+12532158782,,93557863987# US (Tacoma)+13017158592,,93557863987# US (Washington DC)---Dial by your location• +1 253 215 8782 US (Tacoma)• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• +1 346 248 7799 US (Houston)• +1 360 209 5623 US• +1 386 347 5053 US• +1 507 473 4847 US• +1 564 217 2000 US• +1 646 558 8656 US (New York)• +1 646 931 3860 US• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 689 278 1000 US• +1 719 359 4580 US• +1 253 205 0468 US• 833 548 0276 US Toll-free• 833 548 0282 US Toll-free• 833 928 4608 US Toll-free• 833 928 4609 US Toll-free• 833 928 4610 US Toll-free• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 935 5786 3987Find your local number: https://linaro-org.zoom.us/u/adoz9mILli Guests qwandor(a)google.com praan(a)google.com jeremimiller(a)google.com jagdish.gediya(a)linaro.org tf-a(a)lists.trustedfirmware.org ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

4 months, 3 weeks

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First Hafnium LTS release

by Madhukar Pappireddy

Hi, We will be making the first Hafnium LTS branch release based of the recent v2.14.0 tag. We would encourage anyone interested in Hafnium LTS support or maintenance to subscribe themselves to this mailing list: https://lists.trustedfirmware.org/mailman3/lists/hafnium-lts.lists.trustedf… <https://lists.trustedfirmware.org/mailman3/lists/hafnium-lts.lists.trustedf…> We also recommend to join the hafnium-lts channel in trustedfirmware discord server for real time updates and getting involved with the LTS maintenance. Thanks, Madhukar

4 months, 4 weeks

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TF-A Tech Forum Dec 11th 4.00pm (UK) - TF-RMM Live Firmware Activation (design update)

by Olivier Deprez

Hi, On Dec 11th in the TF-A Tech Forum at 4.00pm UK, Soby Mathew will present a design update on TF-RMM Live Firmware Activation: This presentation describes the revised TF-RMM Low-VA MMU and global-runtime-data design required to support Live Firmware Activation (LFA). Compared to the earlier approach (outlined in the TFA Tech Forum session on 12-Jun-2025 [1] ), which assumed mostly fixed boot time mappings and per-platform handcrafted Low-VA contexts, the new design is driven by several changes in RMM specification: RMM must now support runtime mapping/unmapping of PAs for RMM objects like struct granule , reuse those dynamic mappings across LFA transitions. These PAs can come either from NS world at runtime or EL3 reservation from RMM carveout. In order to migrate Stage 1 dynamic mappings across LFA instances, RMM needs to reduce dependence on platform-specific MMU setup, and provide a structured framework for allocating, versioning and migrating global runtime data. The Stage 1 Low-VA is therefore split into static and dynamic regions managed by the common xlat layer. The detailed design is captured in the TF-RMM wiki RFC “TF-RMM Live Firmware Activation [2]” and builds on the initial design presented in the TFA Tech Forum session on 12-Jun-2025 [1] : [1] Previous LFA discussion: https://github.com/TF-RMM/tf-rmm/wiki/TFA-Tech-Forum-Presentations [2] https://github.com/TF-RMM/tf-rmm/wiki/RFC:-TF%E2%80%90RMM-Live-Firmware-Act… Regards, Olivier. TF-A Tech Forum Thursday Dec 11, 2025 ⋅ 5pm – 6pm Central European Time - Paris Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34.1Meeting ID: 935 5786 3987Passcode: 939141---One tap mobile+12532158782,,93557863987# US (Tacoma)+13017158592,,93557863987# US (Washington DC)---Dial by your location• +1 253 215 8782 US (Tacoma)• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• +1 346 248 7799 US (Houston)• +1 360 209 5623 US• +1 386 347 5053 US• +1 507 473 4847 US• +1 564 217 2000 US• +1 646 558 8656 US (New York)• +1 646 931 3860 US• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 689 278 1000 US• +1 719 359 4580 US• +1 253 205 0468 US• 833 548 0276 US Toll-free• 833 548 0282 US Toll-free• 833 928 4608 US Toll-free• 833 928 4609 US Toll-free• 833 928 4610 US Toll-free• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 935 5786 3987Find your local number: https://linaro-org.zoom.us/u/adoz9mILli Guests tf-a(a)lists.trustedfirmware.org qwandor(a)google.com praan(a)google.com jeremimiller(a)google.com jagdish.gediya(a)linaro.org

4 months, 4 weeks

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TF-A Tech Forum Dec 11th 4.00pm (UK) - TF-RMM Live Firmware Activation (design update)

by Olivier Deprez

Hi, On Dec 11th in the TF-A Tech Forum at 4.00pm UK, Soby Mathew will present a design update on TF-RMM Live Firmware Activation: This presentation describes the revised TF-RMM Low-VA MMU and global-runtime-data design required to support Live Firmware Activation (LFA). Compared to the earlier approach (outlined in the TFA Tech Forum session on 12-Jun-2025 [1] ), which assumed mostly fixed boot time mappings and per-platform handcrafted Low-VA contexts, the new design is driven by several changes in RMM specification: RMM must now support runtime mapping/unmapping of PAs for RMM objects like struct granule , reuse those dynamic mappings across LFA transitions. These PAs can come either from NS world at runtime or EL3 reservation from RMM carveout. In order to migrate Stage 1 dynamic mappings across LFA instances, RMM needs to reduce dependence on platform-specific MMU setup, and provide a structured framework for allocating, versioning and migrating global runtime data. The Stage 1 Low-VA is therefore split into static and dynamic regions managed by the common xlat layer. The detailed design is captured in the TF-RMM wiki RFC “TF-RMM Live Firmware Activation [2]” and builds on the initial design presented in the TFA Tech Forum session on 12-Jun-2025 [1] : [1] Previous LFA discussion: https://github.com/TF-RMM/tf-rmm/wiki/TFA-Tech-Forum-Presentations [2] https://github.com/TF-RMM/tf-rmm/wiki/RFC:-TF%E2%80%90RMM-Live-Firmware-Act… Regards, Olivier.

4 months, 4 weeks

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Synced invitation: TF-A Tech Forum @ Thu 2025-11-13 4pm - 5pm (GMT) (tf-a@lists.trustedfirmware.org)

by qwandor＠google.com

This email keeps the event up to date in your calendar. TF-A Tech Forum Thursday 2025-11-13 ⋅ 4pm – 5pm United Kingdom Time Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34.1Meeting ID: 935 5786 3987Passcode: 939141---One tap mobile+12532158782,,93557863987# US (Tacoma)+13017158592,,93557863987# US (Washington DC)---Dial by your location• +1 253 215 8782 US (Tacoma)• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• +1 346 248 7799 US (Houston)• +1 360 209 5623 US• +1 386 347 5053 US• +1 507 473 4847 US• +1 564 217 2000 US• +1 646 558 8656 US (New York)• +1 646 931 3860 US• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 689 278 1000 US• +1 719 359 4580 US• +1 253 205 0468 US• 833 548 0276 US Toll-free• 833 548 0282 US Toll-free• 833 928 4608 US Toll-free• 833 928 4609 US Toll-free• 833 928 4610 US Toll-free• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 935 5786 3987Find your local number: https://linaro-org.zoom.us/u/adoz9mILli Guests qwandor(a)google.com praan(a)google.com jeremimiller(a)google.com tf-a(a)lists.trustedfirmware.org ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

5 months, 1 week

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Synced invitation: TF-A Tech Forum @ Every 2 weeks from 4pm to 5pm on Thursday (BST) (tf-a@lists.trustedfirmware.org)

by Andrew Walbran

This email keeps the event up to date in your calendar. TF-A Tech Forum Every 2 weeks from 4pm to 5pm on Thursday United Kingdom Time Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34.1Meeting ID: 935 5786 3987Passcode: 939141---One tap mobile+12532158782,,93557863987# US (Tacoma)+13017158592,,93557863987# US (Washington DC)---Dial by your location• +1 253 215 8782 US (Tacoma)• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• +1 346 248 7799 US (Houston)• +1 360 209 5623 US• +1 386 347 5053 US• +1 507 473 4847 US• +1 564 217 2000 US• +1 646 558 8656 US (New York)• +1 646 931 3860 US• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 689 278 1000 US• +1 719 359 4580 US• +1 253 205 0468 US• 833 548 0276 US Toll-free• 833 548 0282 US Toll-free• 833 928 4608 US Toll-free• 833 928 4609 US Toll-free• 833 928 4610 US Toll-free• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 935 5786 3987Find your local number: https://linaro-org.zoom.us/u/adoz9mILli Guests tf-a(a)lists.trustedfirmware.org Andrew Walbran Pranjal Shrivastava Jeremi Miller ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

5 months, 1 week

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Synced invitation: TF-A Tech Forum @ Every 2 weeks from 4pm to 5pm on Thursday (GMT) (tf-a@lists.trustedfirmware.org)

by Andrew Walbran

This email keeps the event up to date in your calendar. TF-A Tech Forum Every 2 weeks from 4pm to 5pm on Thursday United Kingdom Time Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786… Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the following iCalendar (.ics) files to your calendar system.Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics… Zoom Meetinghttps://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34.1Meeting ID: 935 5786 3987Passcode: 939141---One tap mobile+12532158782,,93557863987# US (Tacoma)+13017158592,,93557863987# US (Washington DC)---Dial by your location• +1 253 215 8782 US (Tacoma)• +1 301 715 8592 US (Washington DC)• +1 305 224 1968 US• +1 309 205 3325 US• +1 312 626 6799 US (Chicago)• +1 346 248 7799 US (Houston)• +1 360 209 5623 US• +1 386 347 5053 US• +1 507 473 4847 US• +1 564 217 2000 US• +1 646 558 8656 US (New York)• +1 646 931 3860 US• +1 669 444 9171 US• +1 669 900 9128 US (San Jose)• +1 689 278 1000 US• +1 719 359 4580 US• +1 253 205 0468 US• 833 548 0276 US Toll-free• 833 548 0282 US Toll-free• 833 928 4608 US Toll-free• 833 928 4609 US Toll-free• 833 928 4610 US Toll-free• 877 853 5247 US Toll-free• 888 788 0099 US Toll-freeMeeting ID: 935 5786 3987Find your local number: https://linaro-org.zoom.us/u/adoz9mILli Guests tf-a(a)lists.trustedfirmware.org Andrew Walbran Pranjal Shrivastava Jeremi Miller ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

5 months, 1 week

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TF-A Tech Forum - Nov 27th - Overview of measured boot driver libraries

by Olivier Deprez

Hi, In the TF-A Tech forum on Thursday Nov 27th 4.00pm UK, Harrison Mutai<mailto:Harrison.Mutai@arm.com> and Matthew Ellis<mailto:Matthew.Ellis@arm.com> will provide an overview of the shared measured boot driver libraries, namely: LibTPM and LibEventLog, and align on design, integration, and contribution workflows: - Motivation for introducing shared measured boot driver libraries - Overview of current architecture and key components - Integration into platform builds and deployment examples (FVP and RPi) - Testing and CI workflows for validation and patch contributions - Access, contribution process, and future development plan Regards, Olivier. ________________________________ From: Trusted Firmware Public Meetings Sent: 02 May 2025 12:00 To: Trusted Firmware Public Meetings <linaro.org_havjv2figrh5egaiurb229pd8c(a)group.calendar.google.com>; tf-a(a)lists.trustedfirmware.org <tf-a(a)lists.trustedfirmware.org> Subject: TF-A Tech Forum When: 27 November 2025 17:00-18:00. Where: https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… TF-A Tech Forum Trusted Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech ForumTime: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s)Please download and import the follow Trusted Firmware is inviting you to a scheduled Zoom meeting. Topic: TF-A Tech Forum Time: May 15, 2025 02:00 PM London Every 2 weeks on Thu, 78 occurrence(s) Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://linaro-org.zoom.us/meeting/tJcocu6gqDgjEtOkyBhSQauR1sUyFwIcNKLa/ics…<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fmeeting%2Ft…> Join Zoom Meeting https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34…<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786…> Meeting ID: 935 5786 3987 Passcode: 939141 --- One tap mobile +12532158782,,93557863987# US (Tacoma) +13017158592,,93557863987# US (Washington DC) --- Dial by your location • +1 253 215 8782 US (Tacoma) • +1 301 715 8592 US (Washington DC) • +1 305 224 1968 US • +1 309 205 3325 US • +1 312 626 6799 US (Chicago) • +1 346 248 7799 US (Houston) • +1 360 209 5623 US • +1 386 347 5053 US • +1 507 473 4847 US • +1 564 217 2000 US • +1 646 558 8656 US (New York) • +1 646 931 3860 US • +1 669 444 9171 US • +1 669 900 9128 US (San Jose) • +1 689 278 1000 US • +1 719 359 4580 US • +1 253 205 0468 US • 833 548 0276 US Toll-free • 833 548 0282 US Toll-free • 833 928 4608 US Toll-free • 833 928 4609 US Toll-free • 833 928 4610 US Toll-free • 877 853 5247 US Toll-free • 888 788 0099 US Toll-free Meeting ID: 935 5786 3987 Find your local number: https://linaro-org.zoom.us/u/adoz9mILli<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fu%2Fadoz9mI…> When Every 2 weeks from 4pm to 5pm on Thursday (United Kingdom Time) Location https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34… View map<https://www.google.com/url?q=https%3A%2F%2Flinaro-org.zoom.us%2Fj%2F9355786…> Guests tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org> View all guest info<https://calendar.google.com/calendar/event?action=VIEW&eid=NnR0NGMyZWJkdnBn…> RSVP for tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org> for all events in this series Yes<https://calendar.google.com/calendar/event?action=RESPOND&eid=NnR0NGMyZWJkd…> No<https://calendar.google.com/calendar/event?action=RESPOND&eid=NnR0NGMyZWJkd…> Maybe<https://calendar.google.com/calendar/event?action=RESPOND&eid=NnR0NGMyZWJkd…> More options<https://calendar.google.com/calendar/event?action=VIEW&eid=NnR0NGMyZWJkdnBn…> Invitation from Google Calendar<https://calendar.google.com/calendar/> You are receiving this email because you are an attendee on the event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more<https://support.google.com/calendar/answer/37135#forwarding>

5 months, 1 week

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Non volatile boot index for the purpose of firmware update

by Patryk

Hi I'm looking for a suggestion for a reliable place to store a small boot index for PSA Firmware Update. SNVS LPGPRs looked promising, but NXP’s guidance is thin and we don’t keep the battery-backed LP domain alive, so those values won’t survive many power cycles. Are there better options on LS1028A? Would using the user RAM byte in our external I2C RTC make sense? Or perhaps should I store it on eMMC? (we don't use raw NOR/NAND flash). That RTC I mentioned is already accessed in both U-Boot and Linux, so I’m wary of conflicts but can try it if you think it’s viable. Any suggestions would be much appreciated. Best regards Patryk

5 months, 1 week

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Question about SError exception routing

by Julius Werner

Hi, I have a sort of generic Arm architecture question that's not directly related to TF-A (other than that TF-A controls some of the registers involved in this decision), but I'm hoping that one of the experts here can still help me out or at least refer me to someone who can. I'm trying to figure out how exception routing for SError aborts works in EL2. Specifically, I have a bootloader (BL33) running in NS-EL2 and I want the "simple" setup that it manages all its own exceptions, the same way that an OS kernel normally manages all exceptions at EL1. I assumed that I could achieve that simply by installing exception handlers, unmasking all exceptions in PSTATE, and leaving all the special trap feature bits in the MSRs at 0 (disabled). This seems to work for synchronous exceptions and external aborts, but not for SErrors. Looking at the architecture reference manual (revision L.b), table D1-14 in section D1.3.6.3 (page D1-6114), I can see that my case is represented by the first line (all special trap bits 0), which shows that SErrors caused by EL0 and EL1 would be routed to EL1 as expected (though even when PSTATE.A is 1 which seems odd?), but SErrors caused by EL2 will get ignored and remain pending (with no regard to PSTATE.A). Instead, the "default" behavior I expect (aborts get routed to the EL that caused them if PSTATE.A is 0) seems to require me to enable SCTLR_EL2.NMEA. But if you're looking at the description of SCTLR_EL2.NMEA, it says that it controls whether PSTATE.A masks SError exceptions at EL2 (and that if it is 0, SError exceptions are not taken at EL2 if PSTATE.A == 1). Doesn't that imply that SError exceptions *are* taken at EL2 if PSTATE.A == 0? What does a control that seems to be about trapping masked aborts from a lower EL have to do with unmasked aborts from my current EL? Basically, I think what I'm asking is: is that table really correct as printed (some behavior we've observed seems to indicate it is), and if so, why? Why do SError exceptions seem to behave differently by default in EL1 and EL2 (in regards to unmasked exceptions taken from the same exception level)? Why does the PSTATE.A bit only seem to apply to EL0 and EL1, not EL2 and EL3, even for exceptions taken from the same level, when this peculiarity seems to not be mentioned anywhere else in the manual? Why do SError exceptions get treated so differently from external aborts in EL2/EL3, when in EL1 they seem to mostly count as the same? Is the current description of the NMEA bit in the SCTLR_EL2 register documentation really accurate, if it also seems to make fundamental changes to cases not really mentioned in that description? Is there any way for EL2 to only handle its own SError exceptions without interfering with EL1's exception handling when FEAT_DoubleFault2 is not implemented (other than flipping HCR_EL2.AMO on every EL2 entry/exit)? And am I the only one who finds this all incredibly inconsistent and confusing? I feel like I'm missing some critical insight in how you were meant to think about this to make it make sense, would appreciate any help in that regard! Thanks, Julius

5 months, 1 week

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