diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c
index 23fa6845a8..43132ff6e0 100644
--- a/xen/common/sched/core.c
+++ b/xen/common/sched/core.c
@@ -1284,6 +1284,35 @@ static int cpu_disable_scheduler_check(unsigned int cpu)
     return 0;
 }
 
+/*
+ * Called after a cpu has come up again in a suspend/resume cycle.
+ * Migrate all timers for this cpu (they have been migrated to cpu 0 when the
+ * cpu was going down).
+ * Note that only timers related to a physical cpu are migrated, not the ones
+ * related to a vcpu or domain.
+ */
+void sched_migrate_timers(unsigned int cpu)
+{
+    struct sched_resource *sr;
+
+    rcu_read_lock(&sched_res_rculock);
+
+    sr = get_sched_res(cpu);
+
+    /*
+     * Note that on a system with parked cpus (e.g. smt=0 on Intel cpus) this
+     * will be called for the parked cpus, too, so the case for no scheduling
+     * resource being available must be considered.
+     */
+    if ( sr && sr->master_cpu == cpu )
+    {
+        migrate_timer(&sr->s_timer, cpu);
+        sched_move_timers(sr->scheduler, sr);
+    }
+
+    rcu_read_unlock(&sched_res_rculock);
+}
+
 /*
  * In general, this must be called with the scheduler lock held, because the
  * adjust_affinity hook may want to modify the vCPU state. However, when the
diff --git a/xen/common/sched/cpupool.c b/xen/common/sched/cpupool.c
index b2c6f520c3..bdf6030ab0 100644
--- a/xen/common/sched/cpupool.c
+++ b/xen/common/sched/cpupool.c
@@ -1035,6 +1035,8 @@ static int cf_check cpu_callback(
     case CPU_ONLINE:
         if ( system_state <= SYS_STATE_active )
             rc = cpupool_cpu_add(cpu);
+        else
+            sched_migrate_timers(cpu);
         break;
     case CPU_DOWN_PREPARE:
         /* Suspend/Resume don't change assignments of cpus to cpupools. */
diff --git a/xen/common/sched/credit.c b/xen/common/sched/credit.c
index 47945c2834..f2cd3d9da3 100644
--- a/xen/common/sched/credit.c
+++ b/xen/common/sched/credit.c
@@ -614,6 +614,18 @@ init_pdata(struct csched_private *prv, struct csched_pcpu *spc, int cpu)
     spc->nr_runnable = 0;
 }
 
+static void cf_check
+csched_move_timers(const struct scheduler *ops, struct sched_resource *sr)
+{
+    struct csched_private *prv = CSCHED_PRIV(ops);
+    struct csched_pcpu *spc = sr->sched_priv;
+
+    if ( sr->master_cpu == prv->master )
+        migrate_timer(&prv->master_ticker, prv->master);
+
+    migrate_timer(&spc->ticker, sr->master_cpu);
+}
+
 /* Change the scheduler of cpu to us (Credit). */
 static spinlock_t *cf_check
 csched_switch_sched(struct scheduler *new_ops, unsigned int cpu,
@@ -2264,6 +2276,7 @@ static const struct scheduler sched_credit_def = {
     .switch_sched   = csched_switch_sched,
     .alloc_domdata  = csched_alloc_domdata,
     .free_domdata   = csched_free_domdata,
+    .move_timers    = csched_move_timers,
 };
 
 REGISTER_SCHEDULER(sched_credit_def);
diff --git a/xen/common/sched/private.h b/xen/common/sched/private.h
index 0126a4bb9e..0527a8c70d 100644
--- a/xen/common/sched/private.h
+++ b/xen/common/sched/private.h
@@ -331,6 +331,8 @@ struct scheduler {
                                     struct xen_sysctl_scheduler_op *);
     void         (*dump_settings)  (const struct scheduler *);
     void         (*dump_cpu_state) (const struct scheduler *, int);
+    void         (*move_timers)    (const struct scheduler *,
+                                    struct sched_resource *);
 };
 
 static inline int sched_init(struct scheduler *s)
@@ -485,6 +487,13 @@ static inline int sched_adjust_cpupool(const struct scheduler *s,
     return s->adjust_global ? s->adjust_global(s, op) : 0;
 }
 
+static inline void sched_move_timers(const struct scheduler *s,
+                                     struct sched_resource *sr)
+{
+    if ( s->move_timers )
+        s->move_timers(s, sr);
+}
+
 static inline void sched_unit_pause_nosync(const struct sched_unit *unit)
 {
     struct vcpu *v;
@@ -622,6 +631,7 @@ struct cpu_rm_data *alloc_cpu_rm_data(unsigned int cpu, bool aff_alloc);
 void free_cpu_rm_data(struct cpu_rm_data *mem, unsigned int cpu);
 int schedule_cpu_rm(unsigned int cpu, struct cpu_rm_data *mem);
 int sched_move_domain(struct domain *d, struct cpupool *c);
+void sched_migrate_timers(unsigned int cpu);
 struct cpupool *cpupool_get_by_id(unsigned int poolid);
 void cpupool_put(struct cpupool *pool);
 int cpupool_add_domain(struct domain *d, unsigned int poolid);
diff --git a/xen/common/sched/rt.c b/xen/common/sched/rt.c
index 1f8d074884..d443cd5831 100644
--- a/xen/common/sched/rt.c
+++ b/xen/common/sched/rt.c
@@ -750,6 +750,27 @@ rt_switch_sched(struct scheduler *new_ops, unsigned int cpu,
     return &prv->lock;
 }
 
+static void move_repl_timer(struct rt_private *prv, unsigned int old_cpu)
+{
+    cpumask_t *online = get_sched_res(old_cpu)->cpupool->res_valid;
+    unsigned int new_cpu = cpumask_cycle(old_cpu, online);
+
+    /*
+     * Make sure the timer run on one of the cpus that are still available
+     * to this scheduler. If there aren't any left, it means it's the time
+     * to just kill it.
+     */
+    if ( new_cpu >= nr_cpu_ids )
+    {
+        kill_timer(&prv->repl_timer);
+        dprintk(XENLOG_DEBUG, "RTDS: timer killed on cpu %d\n", old_cpu);
+    }
+    else
+    {
+        migrate_timer(&prv->repl_timer, new_cpu);
+    }
+}
+
 static void cf_check
 rt_deinit_pdata(const struct scheduler *ops, void *pcpu, int cpu)
 {
@@ -759,25 +780,25 @@ rt_deinit_pdata(const struct scheduler *ops, void *pcpu, int cpu)
     spin_lock_irqsave(&prv->lock, flags);
 
     if ( prv->repl_timer.cpu == cpu )
-    {
-        cpumask_t *online = get_sched_res(cpu)->cpupool->res_valid;
-        unsigned int new_cpu = cpumask_cycle(cpu, online);
+        move_repl_timer(prv, cpu);
 
-        /*
-         * Make sure the timer run on one of the cpus that are still available
-         * to this scheduler. If there aren't any left, it means it's the time
-         * to just kill it.
-         */
-        if ( new_cpu >= nr_cpu_ids )
-        {
-            kill_timer(&prv->repl_timer);
-            dprintk(XENLOG_DEBUG, "RTDS: timer killed on cpu %d\n", cpu);
-        }
-        else
-        {
-            migrate_timer(&prv->repl_timer, new_cpu);
-        }
-    }
+    spin_unlock_irqrestore(&prv->lock, flags);
+}
+
+static void cf_check
+rt_move_timers(const struct scheduler *ops, struct sched_resource *sr)
+{
+    unsigned long flags;
+    struct rt_private *prv = rt_priv(ops);
+    unsigned int old_cpu;
+
+    spin_lock_irqsave(&prv->lock, flags);
+
+    old_cpu = prv->repl_timer.cpu;
+    if ( prv->repl_timer.status != TIMER_STATUS_invalid &&
+         prv->repl_timer.status != TIMER_STATUS_killed &&
+         !cpumask_test_cpu(old_cpu, sr->cpupool->res_valid) )
+        move_repl_timer(prv, old_cpu);
 
     spin_unlock_irqrestore(&prv->lock, flags);
 }
@@ -1561,6 +1582,7 @@ static const struct scheduler sched_rtds_def = {
     .sleep          = rt_unit_sleep,
     .wake           = rt_unit_wake,
     .context_saved  = rt_context_saved,
+    .move_timers    = rt_move_timers,
 };
 
 REGISTER_SCHEDULER(sched_rtds_def);
