From: Yi Wang <up2wing@gmail.com>
To: seanjc@google.com, pbonzini@redhat.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
x86@kernel.org, hpa@zytor.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, wanpengli@tencent.com,
foxywang@tencent.com, oliver.upton@linux.dev, maz@kernel.org,
anup@brainfault.org, atishp@atishpatra.org,
borntraeger@linux.ibm.com, frankja@linux.ibm.com,
imbrenda@linux.ibm.com
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 [thread overview]
Message-ID: <20240121111730.262429-3-foxywang@tencent.com> (raw)
In-Reply-To: <20240121111730.262429-1-foxywang@tencent.com>
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
next prev parent reply other threads:[~2024-01-21 11:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-21 11:17 [v2 0/4] KVM: irqchip: synchronize srcu only if needed Yi Wang
2024-01-21 11:17 ` [v2 1/4] KVM: irqchip: add setup empty irq routing function Yi Wang
2024-01-23 18:47 ` Oliver Upton
2024-01-24 2:12 ` Yi Wang
2024-01-21 11:17 ` Yi Wang [this message]
2024-01-21 11:17 ` [v2 3/4] KVM: x86: don't setup empty irq routing when KVM_CAP_SPLIT_IRQCHIP Yi Wang
2024-01-21 11:17 ` [v2 4/4] KVM: s390: don't setup dummy routing when KVM_CREATE_IRQCHIP Yi Wang
2024-01-23 18:54 ` Oliver Upton
2024-01-24 2:16 ` Yi Wang
2024-01-24 12:14 ` [v2 0/4] KVM: irqchip: synchronize srcu only if needed Christian Borntraeger
2024-01-24 12:44 ` Yi Wang
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