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-rw-r--r--virt/kvm/arm/arch_timer.c28
1 files changed, 17 insertions, 11 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 21a0ab2d8919..69bca185c471 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -221,17 +221,23 @@ void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu)
221 kvm_timer_update_state(vcpu); 221 kvm_timer_update_state(vcpu);
222 222
223 /* 223 /*
224 * If we enter the guest with the virtual input level to the VGIC 224 * If we enter the guest with the virtual input level to the VGIC
225 * asserted, then we have already told the VGIC what we need to, and 225 * asserted, then we have already told the VGIC what we need to, and
226 * we don't need to exit from the guest until the guest deactivates 226 * we don't need to exit from the guest until the guest deactivates
227 * the already injected interrupt, so therefore we should set the 227 * the already injected interrupt, so therefore we should set the
228 * hardware active state to prevent unnecessary exits from the guest. 228 * hardware active state to prevent unnecessary exits from the guest.
229 * 229 *
230 * Conversely, if the virtual input level is deasserted, then always 230 * Also, if we enter the guest with the virtual timer interrupt active,
231 * clear the hardware active state to ensure that hardware interrupts 231 * then it must be active on the physical distributor, because we set
232 * from the timer triggers a guest exit. 232 * the HW bit and the guest must be able to deactivate the virtual and
233 */ 233 * physical interrupt at the same time.
234 if (timer->irq.level) 234 *
235 * Conversely, if the virtual input level is deasserted and the virtual
236 * interrupt is not active, then always clear the hardware active state
237 * to ensure that hardware interrupts from the timer triggers a guest
238 * exit.
239 */
240 if (timer->irq.level || kvm_vgic_map_is_active(vcpu, timer->map))
235 phys_active = true; 241 phys_active = true;
236 else 242 else
237 phys_active = false; 243 phys_active = false;