diff options
Diffstat (limited to 'arch/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 9235842cd76a..c21b825ed056 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -709,6 +709,15 @@ static int xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle) WARN_ON(rc); if (!rc) rc = native_cpu_up(cpu, tidle); + + /* + * We must initialize the slowpath CPU kicker _after_ the native + * path has executed. If we initialized it before none of the + * unlocker IPI kicks would reach the booting CPU as the booting + * CPU had not set itself 'online' in cpu_online_mask. That mask + * is checked when IPIs are sent (on HVM at least). + */ + xen_init_lock_cpu(cpu); return rc; } |