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Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c19
1 files changed, 5 insertions, 14 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8b8a44453670..d8db2f8fce9c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2206,6 +2206,11 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
}
kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu;
+
+ /*
+ * Pairs with smp_rmb() in kvm_get_vcpu. Write kvm->vcpus
+ * before kvm->online_vcpu's incremented value.
+ */
smp_wmb();
atomic_inc(&kvm->online_vcpus);
@@ -2618,9 +2623,6 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
case KVM_CAP_USER_MEMORY:
case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS:
-#ifdef CONFIG_KVM_APIC_ARCHITECTURE
- case KVM_CAP_SET_BOOT_CPU_ID:
-#endif
case KVM_CAP_INTERNAL_ERROR_DATA:
#ifdef CONFIG_HAVE_KVM_MSI
case KVM_CAP_SIGNAL_MSI:
@@ -2716,17 +2718,6 @@ static long kvm_vm_ioctl(struct file *filp,
r = kvm_ioeventfd(kvm, &data);
break;
}
-#ifdef CONFIG_KVM_APIC_ARCHITECTURE
- case KVM_SET_BOOT_CPU_ID:
- r = 0;
- mutex_lock(&kvm->lock);
- if (atomic_read(&kvm->online_vcpus) != 0)
- r = -EBUSY;
- else
- kvm->bsp_vcpu_id = arg;
- mutex_unlock(&kvm->lock);
- break;
-#endif
#ifdef CONFIG_HAVE_KVM_MSI
case KVM_SIGNAL_MSI: {
struct kvm_msi msi;