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| author |   Eddie Dong <eddie.dong@intel.com> | 2007-07-18 12:15:21 +0300 |
|---|---|---|
| committer |   Avi Kivity <avi@qumranet.com> | 2007-10-13 10:18:25 +0200 |
| commit | b6958ce44a11a9e9425d2b67a653b1ca2a27796f (patch) | |
| tree | 503478ef27254df9b6ea21d2a6a279a7dfe2ef04 /drivers/kvm/irq.c | |
| parent | KVM: In-kernel I/O APIC model (diff) | |
| download | linux-dev-b6958ce44a11a9e9425d2b67a653b1ca2a27796f.tar.xz linux-dev-b6958ce44a11a9e9425d2b67a653b1ca2a27796f.zip | |
KVM: Emulate hlt in the kernel
By sleeping in the kernel when hlt is executed, we simplify the in-kernel
guest interrupt path considerably.
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/irq.c')
| -rw-r--r-- | drivers/kvm/irq.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/kvm/irq.c b/drivers/kvm/irq.c index 5265f8267b3b..e09cd65925d6 100644 --- a/drivers/kvm/irq.c +++ b/drivers/kvm/irq.c @@ -70,6 +70,10 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu) { int ipi_pcpu = vcpu->cpu; + if (waitqueue_active(&vcpu->wq)) { + wake_up_interruptible(&vcpu->wq); + ++vcpu->stat.halt_wakeup; + } if (vcpu->guest_mode) smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); } |