Commit 43c5c868 authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

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



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: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230103095022.3230946-3-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent b7bfaa76

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

+1 −1
Original line number Diff line number Diff line
@@ -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,