linux-kernel - [v3 22/26] KVM: Define a wakeup worker thread for vCPU

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Date:	Fri, 12 Dec 2014 23:14:56 +0800
From:	Feng Wu <feng.wu@...el.com>
To:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, gleb@...nel.org, pbonzini@...hat.com,
	dwmw2@...radead.org, joro@...tes.org, alex.williamson@...hat.com,
	jiang.liu@...ux.intel.com
Cc:	eric.auger@...aro.org, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
	Feng Wu <feng.wu@...el.com>
Subject: [v3 22/26] KVM: Define a wakeup worker thread for vCPU

Define a wakeup worker thread for a vCPU.

Signed-off-by: Feng Wu <feng.wu@...el.com>
---
 include/linux/kvm_host.h | 1 +
 virt/kvm/kvm_main.c      | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ca9a393..3d7242c 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -249,6 +249,7 @@ struct kvm_vcpu {
 	int sigset_active;
 	sigset_t sigset;
 	struct kvm_vcpu_stat stat;
+	struct work_struct wakeup_worker;
 
 #ifdef CONFIG_HAS_IOMEM
 	int mmio_needed;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 25ffac9..ba53fd6 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -211,6 +211,13 @@ void kvm_make_scan_ioapic_request(struct kvm *kvm)
 	kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC);
 }
 
+static void wakeup_thread(struct work_struct *work)
+{
+	struct kvm_vcpu *vcpu = container_of(work, struct kvm_vcpu,
+				wakeup_worker);
+	kvm_vcpu_kick(vcpu);
+}
+
 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
 {
 	struct page *page;
@@ -224,6 +231,8 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
 	init_waitqueue_head(&vcpu->wq);
 	kvm_async_pf_vcpu_init(vcpu);
 
+	INIT_WORK(&vcpu->wakeup_worker, wakeup_thread);
+
 	page = alloc_page(GFP_KERNEL | __GFP_ZERO);
 	if (!page) {
 		r = -ENOMEM;
-- 
1.9.1

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