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

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>

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 5bbc1adb705e205dcc5c6de5dc84412e8eafe88d..f68c4036afebdd89633505a9eb45451297269130 100644 (file)
--- 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) ||