[PATCH v2 0/6] Add BBML3 cpu feature
From: Linu Cherian
Date: Wed Jul 08 2026 - 10:57:04 EST
- Patches 1, 2 and 3 adds more cpus to the bbml2_noabort
support list. bbml2_noabort would eventually gets renamed
to bbml3 in a subsequent patch as they are functionally
equivalent.
- Patches 4, 5 & 6 introduces BBML3 cpu feature
Changelog from v1:
* Patches associated with adding cpus to BBML2_NOABORT,
support list, were kept at bottom in v1 is now moved
up in this version, for ease of backporting.
* Adding BBM_3 definition in sysreg moved into a separate patch
* MMFR2_ID check for BBM_3 has been changed from == BBM_3 to
>= BBM_3, so that BBML3 cpu feature gets enabled for BBM_4 as well.
* For feature detection, MMFR2_ID check comes first followed by
midr check for code readability
* Errata details for C1-Ultra and C1-Premium added to commit message
Linu Cherian (6):
arm64: cputype: Add Cortex-A520AE definitions
arm64: cputype: Add C1-Nano definitions
arm64: cpufeature: Extend bbml2_noabort support list
arm64: sysreg: Add BBM_3
arm64: cpufeature: Add BBML3
arm64: cpufeature: Detect BBML3 based on MMFR2 ID
arch/arm64/include/asm/cpufeature.h | 6 ++--
arch/arm64/include/asm/cputype.h | 4 +++
arch/arm64/kernel/cpufeature.c | 54 ++++++++++++++---------------
arch/arm64/mm/contpte.c | 21 +++++------
arch/arm64/mm/mmu.c | 52 +++++++++++++--------------
arch/arm64/mm/proc.S | 4 +--
arch/arm64/tools/cpucaps | 2 +-
arch/arm64/tools/sysreg | 1 +
8 files changed, 71 insertions(+), 73 deletions(-)
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2.43.0