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From: Yi Wang <up2wing@gmail.com>
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Cc: up2wing@gmail.com
Subject: [v2 2/4] KVM: setup empty irq routing when create vm
Date: Sun, 21 Jan 2024 19:17:28 +0800
Message-Id: <20240121111730.262429-3-foxywang@tencent.com>
In-Reply-To: <20240121111730.262429-1-foxywang@tencent.com>
References: <20240121111730.262429-1-foxywang@tencent.com>
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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 --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);
-- 
2.39.3