arm64: Modify _midr_range() functions to read MIDR/REVIDR internally

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These changes lay the groundwork for adding support for guest kernels,
allowing them to leverage target CPU implementations provided by the
VMM.

No functional changes intended.

Suggested-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Sebastian Ott <sebott@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20250221140229.12588-2-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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This commit is contained in:

Shameer Kolothum 2025-02-21 14:02:24 +00:00 • committed by Oliver Upton

parent 0ad2507d5d

commit e3121298c7

8 changed files with 42 additions and 41 deletions

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28

arch/arm64/include/asm/cputype.h

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3

arch/arm64/include/asm/mmu.h

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23

arch/arm64/kernel/cpu_errata.c

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6

arch/arm64/kernel/cpufeature.c

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17

arch/arm64/kernel/proton-pack.c

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2

arch/arm64/kvm/vgic/vgic-v3.c

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2

drivers/clocksource/arm_arch_timer.c

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2

drivers/hwtracing/coresight/coresight-etm4x-core.c

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