(re-sending as previous invitation got lost) Hi, As follow up to the last
session on Nov 13th 2025 [1], a new TF-A Tech Forum session with the
topic 'Scaling Hafnium for advanced mobile OS architectures' will be held
on Jan 22nd 2026 10.00am. Regards, Olivier. [1]
https://www.trustedfirmware.org/meetings/tf-a-technical-forum/ Scaling
Hafnium for advanced mobile OS architectures - Presented by Jack Suann
Trusted Firmware is inviting you to a scheduled Zoom meeting. Topic: TF-A
Tech Forum Join Zoom Meeting
https://linaro-org.zoom.us/j/93557863987?pwd=56a1l8cBnetDTZ6eazHGaE1Ctk4W34…
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
TF-A Tech Forum Jan 22nd 10.00am -Part II Scaling Hafnium for advanced
mobile OS architectures
Thursday Jan 22, 2026 ⋅ 11am – 12pm
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…
Hi, As follow up to the last session on Nov 13th 2025 [1], a new TF-A Tech
Forum session with the topic'Scaling Hafnium for advanced mobile OS
architectures' will be held on Jan 22nd 2026
10.00am. Regards,Olivier. [1] https://www.trustedfirmware.org/meetings/tf-a-technical-forum/ Scaling
Hafnium for advanced mobile OS architectures - Presented by Jack Suann PDF
Presentation Video Recording (Access Password: *PIs1^BD) Trusted
Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech
ForumJoin 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
[AMD Official Use Only - AMD Internal Distribution Only]
Hello Maintainers,
We are observing a reproducible runtime regression on the ZynqMP (Cortex-A53) platform after enabling LTO (ENABLED_LTO=1) and merging the changes from the topic NUMA_AWARE_PER_CPU into our integration branch (https://github.com/ARM-software/arm-trusted-firmware/commit/7303319b3823e9e…).
Summary of the issue
1. Baseline behavior
* Platform: ZynqMP (Cortex-A53)
* Configuration: ENABLED_LTO=1
* Without NUMA_AWARE_PER_CPU: Linux boots and runs stably
* After merging NUMA_AWARE_PER_CPU, Linux boots but hangs during runtime
* During the hang, CPUs are observed to unexpectedly re-enter EL3
* Re-entry into EL3 should not occur during normal Linux runtime execution and strongly suggests corruption or mismanagement of PSCI and/or per-CPU state(arm-trusted-firmware/lib/per_cpu/aarch64/per_cpu_asm.S at master * ARM-software/arm-trusted-firmware<https://github.com/ARM-software/arm-trusted-firmware/blob/master/lib/per_cp…>)
* Reverting the NUMA_AWARE_PER_CPU changes restores stable Linux execution
* The issue is reproducible only when NUMA_AWARE_PER_CPU is present
* This clearly identifies NUMA_AWARE_PER_CPU as the regression source
2. Suspect with LTO
* With NUMA_AWARE_PER_CPU enabled, LTO breaks the per-CPU base calculation
* BL31 contains hand-written assembly that relies on linker-script symbols (e.g., per-CPU section boundaries)
* Under LTO, symbol placement and retention are no longer guaranteed in the same way, leading to incorrect per-CPU base computation
* This results in corrupted per-CPU data and subsequent erroneous PSCI suspend behavior (EL3 re-entry)
3. CPU idle dependency
* The following kernel configuration options are enabled:
* CONFIG_CPU_IDLE=y
* CONFIG_CPU_IDLE_MULTIPLE_DRIVERS=y
* CONFIG_CPU_IDLE_GOV_MENU=y
* CONFIG_DT_IDLE_STATES=y
* This further suggests the issue is triggered during CPU idle / suspend-resume paths, where correct per-CPU state handling is critical
Based on the above:
* This is specific to NUMA_AWARE_PER_CPU combined with LTO
* The failure mode points to per-CPU base calculation and PSCI state corruption
* Reverting NUMA_AWARE_PER_CPU fully restores stability on ZynqMP
We wanted to report this issue upstream and seek guidance on:
* Whether NUMA_AWARE_PER_CPU is expected to be LTO-safe on platforms relying on linker-defined per-CPU sections
* Or if additional constraints / fixes are required for platforms like ZynqMP
We are happy to provide further logs, configuration details, or help to fixes.
Regards,
Prasad Kummari
This event has been canceled with a note:
"Cancelling as no topic this week."
TF-A Tech Forum
Thursday Jan 8, 2026 ⋅ 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
TF-A Tech Forum Jan 22nd 10.00am -Part II Scaling Hafnium for advanced
mobile OS architectures
Thursday Jan 22, 2026 ⋅ 11am – 12pm
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…
Hi, As follow up to the last session on Nov 13th 2025 [1], a new TF-A Tech
Forum session with the topic'Scaling Hafnium for advanced mobile OS
architectures' will be held on Jan 22nd 2026
10.00am. Regards,Olivier. [1] https://www.trustedfirmware.org/meetings/tf-a-technical-forum/ Scaling
Hafnium for advanced mobile OS architectures - Presented by Jack Suann PDF
Presentation Video Recording (Access Password: *PIs1^BD) Trusted
Firmware is inviting you to a scheduled Zoom meeting.Topic: TF-A Tech
ForumJoin 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
View all guest info
https://calendar.google.com/calendar/event?action=VIEW&eid=NmFoYTlsdXBjYjZj…
Reply for tf-a(a)lists.trustedfirmware.org and view more details
https://calendar.google.com/calendar/event?action=VIEW&eid=NmFoYTlsdXBjYjZj…
Your attendance is optional.
~~//~~
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
Hi,
Please find the latest report on new defect(s) introduced to ARM-software/arm-trusted-firmware found with Coverity Scan.
1 new defect(s) introduced to ARM-software/arm-trusted-firmware found with Coverity Scan.
1 defect(s), reported by Coverity Scan earlier, were marked fixed in the recent build analyzed by Coverity Scan.
New defect(s) Reported-by: Coverity Scan
Showing 1 of 1 defect(s)
** CID 501137: Integer handling issues (CONSTANT_EXPRESSION_RESULT)
/common/runtime_svc.c: 261 in handler_sync_exception()
_____________________________________________________________________________________________
*** CID 501137: Integer handling issues (CONSTANT_EXPRESSION_RESULT)
/common/runtime_svc.c: 261 in handler_sync_exception()
255 /* advance the PC to continue after the instruction */
256 write_ctx_reg(state, CTX_ELR_EL3, read_ctx_reg(state, CTX_ELR_EL3) + 4);
257 } /* otherwise return to the trapping instruction (repeating it) */
258 return;
259 /* If FFH Support then try to handle lower EL EA exceptions. */
260 } else if ((exc_class == EC_IABORT_LOWER_EL || exc_class == EC_DABORT_LOWER_EL)
>>> CID 501137: Integer handling issues (CONSTANT_EXPRESSION_RESULT)
>>> "state->ctx_regs[0U /* 0U >> 3U */] | (8UL /* 1UL << 3 */)" is always 1/true regardless of the values of its operand. This occurs as the logical second operand of "&&".
261 && (read_ctx_reg(state, CTX_SCR_EL3) | SCR_EA_BIT)) {
262 #if FFH_SUPPORT
263 /*
264 * Check for Uncontainable error type. If so, route to the
265 * platform fatal error handler rather than the generic EA one.
266 */
________________________________________________________________________________________________________
To view the defects in Coverity Scan visit, https://scan.coverity.com/projects/arm-software-arm-trusted-firmware?tab=ov…