From: Paul Mackerras Date: Mon, 12 Dec 2011 12:24:48 +0000 (+0000) Subject: KVM: PPC: Make wakeups work again for Book3S HV guests X-Git-Tag: v3.12-rc1~3546^2~82 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4e72dbe13528394a413889d73e5025dbdf6cab70;p=kernel%2Fkernel-generic.git KVM: PPC: Make wakeups work again for Book3S HV guests When commit f43fdc15fa ("KVM: PPC: booke: Improve timer register emulation") factored out some code in arch/powerpc/kvm/powerpc.c into a new helper function, kvm_vcpu_kick(), an error crept in which causes Book3s HV guest vcpus to stall. This fixes it. On POWER7 machines, guest vcpus are grouped together into virtual CPU cores that share a single waitqueue, so it's important to use vcpu->arch.wqp rather than &vcpu->wq. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf Signed-off-by: Avi Kivity --- diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index e1ef4d6..4f85ac3 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -562,7 +562,7 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu) int cpu = vcpu->cpu; me = get_cpu(); - if (waitqueue_active(&vcpu->wq)) { + if (waitqueue_active(vcpu->arch.wqp)) { wake_up_interruptible(vcpu->arch.wqp); vcpu->stat.halt_wakeup++; } else if (cpu != me && cpu != -1) {