[PATCH v3 0/2] arm64: errata: Share broken AMU constant-counter handling

Beata Michalska beata.michalska at arm.com
Tue Sep 29 08:42:12 PDT 2026


This series factors out the existing Cortex-A510 erratum 2457168 AMU constant
counter workaround into a generic broken AMU constant-counter capability,
then wires Cortex-A725 erratum 3821522 into the same handling.

---
v3:
- splitted the commit and droped changes for cpucap_is_possible
---

Beata Michalska (2):
  arm64: errata: Factor out broken AMU const counter cap
  arm64: errata: Add Cortex-A725 erratum 3821522 workaround

 Documentation/arch/arm64/silicon-errata.rst |  2 ++
 arch/arm64/Kconfig                          | 30 +++++++++++++++++++++
 arch/arm64/kernel/cpu_errata.c              | 29 +++++++++++++++-----
 arch/arm64/kernel/cpufeature.c              |  2 +-
 arch/arm64/kernel/topology.c                | 16 ++++++-----
 arch/arm64/tools/cpucaps                    |  2 +-
 6 files changed, 66 insertions(+), 15 deletions(-)

-- 
2.43.0




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