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KVM: arm64: vgic: Allow registration of a non-maskable maintenance interrupt

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Our Apple M1/M2 friends do have a per-CPU maintenance interrupt,
but no mask to make use of it in the standard Linux framework.

Given that KVM directly drives the *source* of the interrupt and
leaves the GIC interrupt always enabled, there is no harm in tolerating
such a setup. It will become useful once we enable NV on M2 HW.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230103095022.3230946-3-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Marc Zyngier 2023-01-03 09:50:21 +00:00 committed by Oliver Upton
parent b7bfaa761d
commit 43c5c868bd
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kvm/vgic/vgic-init.c
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@ -572,7 +572,7 @@ int kvm_vgic_hyp_init(void)
if (ret)
return ret;
if (!has_mask)
if (!has_mask && !kvm_vgic_global_state.maint_irq)
return 0;
ret = request_percpu_irq(kvm_vgic_global_state.maint_irq,