arm64: Treat HCR_EL2.E2H as RES1 when ID_AA64MMFR4_EL1.E2H0 is negative

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For CPUs that have ID_AA64MMFR4_EL1.E2H0 as negative, it is important
to avoid the boot path that sets HCR_EL2.E2H=0. Fortunately, we
already have this path to cope with fruity CPUs.

Tweak init_el2 to look at ID_AA64MMFR4_EL1.E2H0 first.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20240122181344.258974-8-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Marc Zyngier 2024-01-22 18:13:41 +00:00 • committed by Oliver Upton

parent da9af5071b

commit 3944382fa6

1 changed files with 15 additions and 8 deletions

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