[PATCH v6 21/39] KVM: arm64: gic-v5: Clear TWI if single task running
From: Sascha Bischoff <hidden>
Date: 2026-03-17 11:46:46
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
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 <redacted> --- arch/arm64/kvm/arm.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 5bbc1adb705e2..f68c4036afebd 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c@@ -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) ||
--
2.34.1