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authorChristoffer Dall <c.dall@virtualopensystems.com>2012-03-08 16:44:24 -0500
committerAvi Kivity <avi@redhat.com>2012-04-08 12:47:47 +0300
commitb6d33834bd4e8bdf4a199812e31b3e36da53c794 (patch)
tree3360ac4b5fa572e3acb21ecdc686c6d941baa2fc /virt
parent66ef89315f121cda9bf5b65a4ef02ad1b4fb16d9 (diff)
downloadlinux-b6d33834bd4e8bdf4a199812e31b3e36da53c794.tar.gz
KVM: Factor out kvm_vcpu_kick to arch-generic code
The kvm_vcpu_kick function performs roughly the same funcitonality on most all architectures, so we shouldn't have separate copies. PowerPC keeps a pointer to interchanging waitqueues on the vcpu_arch structure and to accomodate this special need a __KVM_HAVE_ARCH_VCPU_GET_WQ define and accompanying function kvm_arch_vcpu_wq have been defined. For all other architectures this is a generic inline that just returns &vcpu->wq; Acked-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a9565e24063..7149a2e6552 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1514,6 +1514,28 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
finish_wait(&vcpu->wq, &wait);
}
+/*
+ * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode.
+ */
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+ int me;
+ int cpu = vcpu->cpu;
+ wait_queue_head_t *wqp;
+
+ wqp = kvm_arch_vcpu_wq(vcpu);
+ if (waitqueue_active(wqp)) {
+ wake_up_interruptible(wqp);
+ ++vcpu->stat.halt_wakeup;
+ }
+
+ me = get_cpu();
+ if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
+ if (kvm_arch_vcpu_should_kick(vcpu))
+ smp_send_reschedule(cpu);
+ put_cpu();
+}
+
void kvm_resched(struct kvm_vcpu *vcpu)
{
if (!need_resched())