diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 719f31eecd3..97f6f9565ac 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2362,25 +2362,39 @@ long kvm_arch_vm_ioctl(struct file *filp, if (r) goto out; break; - case KVM_CREATE_IRQCHIP: + case KVM_CREATE_IRQCHIP: { + struct kvm_pic *vpic; + + mutex_lock(&kvm->lock); + r = -EEXIST; + if (kvm->arch.vpic) + goto create_irqchip_unlock; r = -ENOMEM; - kvm->arch.vpic = kvm_create_pic(kvm); - if (kvm->arch.vpic) { + vpic = kvm_create_pic(kvm); + if (vpic) { r = kvm_ioapic_init(kvm); if (r) { - kfree(kvm->arch.vpic); - kvm->arch.vpic = NULL; - goto out; + kfree(vpic); + goto create_irqchip_unlock; } } else - goto out; + goto create_irqchip_unlock; + smp_wmb(); + kvm->arch.vpic = vpic; + smp_wmb(); r = kvm_setup_default_irq_routing(kvm); if (r) { + mutex_lock(&kvm->irq_lock); kfree(kvm->arch.vpic); kfree(kvm->arch.vioapic); - goto out; + kvm->arch.vpic = NULL; + kvm->arch.vioapic = NULL; + mutex_unlock(&kvm->irq_lock); } + create_irqchip_unlock: + mutex_unlock(&kvm->lock); break; + } case KVM_CREATE_PIT: u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; goto create_pit; |