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arm64: Enable the support of pseudo-NMIs

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Add a build option and a command line parameter to build and enable the
support of pseudo-NMIs.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Julien Thierry
2019-01-31 14:59:03 +00:00
committed by Catalin Marinas
parent c25349fd3c
commit bc3c03ccb4
3 changed files with 28 additions and 1 deletions
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10
arch/arm64/kernel/cpufeature.c
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@@ -1207,10 +1207,18 @@ static void cpu_enable_address_auth(struct arm64_cpu_capabilities const *cap)
#endif /* CONFIG_ARM64_PTR_AUTH */
#ifdef CONFIG_ARM64_PSEUDO_NMI
static bool enable_pseudo_nmi;
static int __init early_enable_pseudo_nmi(char *p)
{
return strtobool(p, &enable_pseudo_nmi);
}
early_param("irqchip.gicv3_pseudo_nmi", early_enable_pseudo_nmi);
static bool can_use_gic_priorities(const struct arm64_cpu_capabilities *entry,
int scope)
{
return false;
return enable_pseudo_nmi && has_useable_gicv3_cpuif(entry, scope);
}
#endif