arm64: cpufeature: Set SYSREG_GIC_CPUIF as a boot system feature

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It is not supported to have some CPUs using GICv3 sysreg CPU interface
while some others do not.

Once ICC_SRE_EL1.SRE is set on a CPU, the bit cannot be cleared. Since
matching this feature require setting ICC_SRE_EL1.SRE, it cannot be
turned off if found on a CPU.

Set the feature as STRICT_BOOT, if boot CPU has it, all other CPUs are
required to have it.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

...

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Julien Thierry 2019-01-31 14:58:41 +00:00 • committed by Catalin Marinas

parent a82785a953

commit c9bfdf734d

1 changed files with 1 additions and 1 deletions

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arch/arm64/kernel/cpufeature.c

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