diff mbox series

[v2,2/4] KVM: setup empty irq routing when create vm

Message ID 20240121111730.262429-3-foxywang@tencent.com (mailing list archive)
State New, archived
Headers show
Series KVM: irqchip: synchronize srcu only if needed | expand

Commit Message

Yi Wang Jan. 21, 2024, 11:17 a.m. UTC 
Setup empty irq routing when kvm_create_vm(), so that x86 and s390
no longer need to set empty/dummy irq routing when creating an
IRQCHIP 'cause it avoid an synchronize_srcu.

Signed-off-by: Yi Wang <foxywang@tencent.com>
---
 virt/kvm/kvm_main.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7db96875ac46..db1b13fc0502 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1242,6 +1242,10 @@  static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
 	if (r)
 		goto out_err;
 
+	r = kvm_setup_empty_irq_routing_lockless(kvm);
+	if (r)
+		goto out_err;
+
 	mutex_lock(&kvm_lock);
 	list_add(&kvm->vm_list, &vm_list);
 	mutex_unlock(&kvm_lock);