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-rw-r--r--arch/x86/xen/smp.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 368c290929fe..9235842cd76a 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -700,8 +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;
}