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KVM: arm64: gic-v5: Clear TWI if single task running

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Handle GICv5 in kvm_vcpu_should_clear_twi(). Clear TWI if there is a
single task running, and enable it otherwise. This is a sane default
for GICv5 given the current level of support.

Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Link: https://patch.msgid.link/20260319154937.3619520-23-sascha.bischoff@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Sascha Bischoff 2026-03-19 15:55:26 +00:00 committed by Marc Zyngier
parent da8d9636be
commit f20554ad3c
1 changed files with 3 additions and 0 deletions
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arch/arm64/kvm/arm.c
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@ -613,6 +613,9 @@ static bool kvm_vcpu_should_clear_twi(struct kvm_vcpu *vcpu)
if (unlikely(kvm_wfi_trap_policy != KVM_WFX_NOTRAP_SINGLE_TASK))
return kvm_wfi_trap_policy == KVM_WFX_NOTRAP;
if (vgic_is_v5(vcpu->kvm))
return single_task_running();
return single_task_running() &&
vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3 &&
(atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||