1 files changed, 16 insertions, 3 deletions

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index ca92754eb846..9235842cd76a 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -279,6 +279,7 @@ static void __init xen_smp_prepare_boot_cpu(void)
 
         xen_filter_cpu_maps();
         xen_setup_vcpu_info_placement();
+        xen_init_spinlocks();
 }
 
 static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
@@ -572,6 +573,12 @@ static inline int xen_map_vector(int vector)
         case IRQ_WORK_VECTOR:
                 xen_vector = XEN_IRQ_WORK_VECTOR;
                 break;
+#ifdef CONFIG_X86_64
+        case NMI_VECTOR:
+        case APIC_DM_NMI: /* Some use that instead of NMI_VECTOR */
+                xen_vector = XEN_NMI_VECTOR;
+                break;
+#endif
         default:
                 xen_vector = -1;
                 printk(KERN_ERR "xen: vector 0x%x is not implemented\n",
@@ -680,7 +687,6 @@ void __init xen_smp_init(void)
 {
         smp_ops = xen_smp_ops;
         xen_fill_possible_map();
-        xen_init_spinlocks();
 }
 
 static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
@@ -694,8 +700,15 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
 static int xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
         int rc;
-        rc = native_cpu_up(cpu, tidle);
-        WARN_ON (xen_smp_intr_init(cpu));
+        /*
+         * xen_smp_intr_init() needs to run before native_cpu_up()
+         * so that IPI vectors are set up on the booting CPU before
+         * it is marked online in native_cpu_up().
+        */
+        rc = xen_smp_intr_init(cpu);
+        WARN_ON(rc);
+        if (!rc)
+                rc =  native_cpu_up(cpu, tidle);
         return rc;
 }