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Arm C1-SME2 MP207 Software Developer Errata Notice

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Arm® C1-SME2 MP207 Software Developer Errata Notice

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3559744 Matmul instruction result mismatch due to unexpected value change of the source operand

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3911962 AMU/RAS registers on cold reset might not be preserved when CME transitions from WARM_RST/DBG_REC to ON state

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3779730 MPMM for CME unit can not be controlled by the MPMM pins

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3697653 The CME unit prefetcher might access invalid addresses

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4419448 PMU events do not always count the largest FP operand

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4327717 Multiply-add or Multiply-subtract might be counted as a single operation

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4313364 Throttling events in the AMU or in the PMU might still increment when MPMM is disabled while throttling is active

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4285804 The CME_OP_MMMV_ISSUE event might overcount

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4106078 ETE and ELA timestamps are not accurate for core, complex, or CME unit

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4034271 AMU counter AMEVCNTR03 might be disabled

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3955509 RAS registers might be lost when CME goes into power-off while an ECC error occurs

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3933459 ECC error might lose its RAS information when ECC interrupts are disabled

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3874503 AMCFGR.N field does not report the right number of AMU counters

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3839061 Several PMU events report incorrect values

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3818487 AMEVCNTR01 counter can increment when the CME unit is in standby mode

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3795926 The core state might stay poisoned after being cleared

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3778989 The CME unit might not enter standby mode with the expected latency

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3775811 CME unit does not disable cache invalidation when transitioning from ON->DBG_RECOV->ON

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3766158 Poison state in the CME might get set due to external abort of unrelated access

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3720470 AMU event CME_STALL_BACKEND_MEM is imprecise

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3674603 Incorrect PMU events SSVE_FP_ADDSUB_SPEC and SSVE_FP_MUL_SPEC

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3672577 Incorrect PMU events CME_STALL_FRONTEND_CPU, CME_STALL, and CME_BUS_CYCLES

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3637634 Power transition might deadlock when APB debug traffic is sent to a CME unit

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3562807 Core state in the CME unit might be over poisoned due to poisoning of another core state

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3558271 Debug access to CME unit might deadlock an OFF_EMU to OFF power transition

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3544330 ACTLR_EL1 register might be lost when the CME unit is powered down

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3519923 Debug access to CME unit when powered off might deadlock

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3504624 Possible corruption on instructions operating on ZA register

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3502799 MPMM and RAS registers might be lost when the CME unit is powered down

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3441703 Executing IMP_CMERAMINDEX instruction from 2 cores might prevent executing further IMP_CMERAMINDEX instructions

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3398596 SPE in CME unit can enter a state that partially corrupts following SPE samples from CME unit

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3348123 ECC error might lose its RAS information

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3327176 Some PMU counters in the CME unit can have imprecise values

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3309310 When ELADISABLE pin is set, an access to the ELA implemented in the CME unit might cause a deadlock

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3304775 PMU counters might discard events from the CME unit

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3277155 SPE events are not reported properly for predicate-related events

# metadata.contentDescription
This document outlines RTL-level errata that may affect software developers through observable system behavior.