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KVM: PPC: Book3S HV: Fix KVM hang with CONFIG_KVM_XICS=n 

I noticed KVM is broken when KVM in-kernel XICS emulation
(CONFIG_KVM_XICS) is disabled.

The problem was introduced in 48eaef05 (KVM: PPC: Book3S HV: use
xics_wake_cpu only when defined). It used CONFIG_KVM_XICS to wrap
xics_wake_cpu, where CONFIG_PPC_ICP_NATIVE should have been
used.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Anton Blanchard 2014-03-25 10:47:01 +11:00 committed by Paul Mackerras
parent 69e9fbb278
commit 7505258c5f
1 changed files with 1 additions and 3 deletions
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4
arch/powerpc/kvm/book3s_hv.c
View File

@ -86,7 +86,7 @@ static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
/* CPU points to the first thread of the core */
if (cpu != me && cpu >= 0 && cpu < nr_cpu_ids) {
#ifdef CONFIG_KVM_XICS
#ifdef CONFIG_PPC_ICP_NATIVE
int real_cpu = cpu + vcpu->arch.ptid;
if (paca[real_cpu].kvm_hstate.xics_phys)
xics_wake_cpu(real_cpu);
@ -1360,9 +1360,7 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
smp_wmb();
#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
if (cpu != smp_processor_id()) {
#ifdef CONFIG_KVM_XICS
xics_wake_cpu(cpu);
#endif
if (vcpu->arch.ptid)
++vc->n_woken;
}