[Xen-devel] [PATCH 06/60] xen/sched: move per-vcpu scheduler private data pointer to sched_unit

[Juergen Gross <jgross@xxxxxxxx>]

This prepares making the different schedulers vcpu agnostic.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/common/sched_arinc653.c |  4 ++--
 xen/common/sched_credit.c   |  6 +++---
 xen/common/sched_credit2.c  | 10 +++++-----
 xen/common/sched_null.c     |  4 ++--
 xen/common/sched_rt.c       |  4 ++--
 xen/common/schedule.c       | 24 ++++++++++++------------
 xen/include/xen/sched.h     |  2 +-
 7 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/xen/common/sched_arinc653.c b/xen/common/sched_arinc653.c
index 283730b3f8..840891318e 100644
--- a/xen/common/sched_arinc653.c
+++ b/xen/common/sched_arinc653.c
@@ -53,7 +53,7 @@
  * Return a pointer to the ARINC 653-specific scheduler data information
  * associated with the given VCPU (vc)
  */
-#define AVCPU(vc) ((arinc653_vcpu_t *)(vc)->sched_priv)
+#define AVCPU(vc) ((arinc653_vcpu_t *)(vc)->sched_unit->priv)
 
 /**
  * Return the global scheduler private data given the scheduler ops pointer
@@ -647,7 +647,7 @@ a653_switch_sched(struct scheduler *new_ops, unsigned int 
cpu,
 
     ASSERT(!pdata && svc && is_idle_vcpu(svc->vc));
 
-    idle_vcpu[cpu]->sched_priv = vdata;
+    idle_vcpu[cpu]->sched_unit->priv = vdata;
 
     return &sd->_lock;
 }
diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c
index eba4db38bb..4cfef189aa 100644
--- a/xen/common/sched_credit.c
+++ b/xen/common/sched_credit.c
@@ -83,7 +83,7 @@
     ((struct csched_private *)((_ops)->sched_data))
 #define CSCHED_PCPU(_c)     \
     ((struct csched_pcpu *)per_cpu(schedule_data, _c).sched_priv)
-#define CSCHED_VCPU(_vcpu)  ((struct csched_vcpu *) (_vcpu)->sched_priv)
+#define CSCHED_VCPU(_vcpu)  ((struct csched_vcpu *) (_vcpu)->sched_unit->priv)
 #define CSCHED_DOM(_dom)    ((struct csched_dom *) (_dom)->sched_priv)
 #define RUNQ(_cpu)          (&(CSCHED_PCPU(_cpu)->runq))
 
@@ -641,7 +641,7 @@ csched_switch_sched(struct scheduler *new_ops, unsigned int 
cpu,
 
     ASSERT(svc && is_idle_vcpu(svc->vcpu));
 
-    idle_vcpu[cpu]->sched_priv = vdata;
+    idle_vcpu[cpu]->sched_unit->priv = vdata;
 
     /*
      * We are holding the runqueue lock already (it's been taken in
@@ -1022,7 +1022,7 @@ static void
 csched_unit_insert(const struct scheduler *ops, struct sched_unit *unit)
 {
     struct vcpu *vc = unit->vcpu;
-    struct csched_vcpu *svc = vc->sched_priv;
+    struct csched_vcpu *svc = unit->priv;
     spinlock_t *lock;
 
     BUG_ON( is_idle_vcpu(vc) );
diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index def8d87484..86b44dc6cf 100644
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -572,7 +572,7 @@ static inline struct csched2_pcpu *csched2_pcpu(unsigned 
int cpu)
 
 static inline struct csched2_vcpu *csched2_vcpu(const struct vcpu *v)
 {
-    return v->sched_priv;
+    return v->sched_unit->priv;
 }
 
 static inline struct csched2_dom *csched2_dom(const struct domain *d)
@@ -970,7 +970,7 @@ _runq_assign(struct csched2_vcpu *svc, struct 
csched2_runqueue_data *rqd)
 static void
 runq_assign(const struct scheduler *ops, struct vcpu *vc)
 {
-    struct csched2_vcpu *svc = vc->sched_priv;
+    struct csched2_vcpu *svc = vc->sched_unit->priv;
 
     ASSERT(svc->rqd == NULL);
 
@@ -997,7 +997,7 @@ _runq_deassign(struct csched2_vcpu *svc)
 static void
 runq_deassign(const struct scheduler *ops, struct vcpu *vc)
 {
-    struct csched2_vcpu *svc = vc->sched_priv;
+    struct csched2_vcpu *svc = vc->sched_unit->priv;
 
     ASSERT(svc->rqd == c2rqd(ops, vc->processor));
 
@@ -3108,7 +3108,7 @@ static void
 csched2_unit_insert(const struct scheduler *ops, struct sched_unit *unit)
 {
     struct vcpu *vc = unit->vcpu;
-    struct csched2_vcpu *svc = vc->sched_priv;
+    struct csched2_vcpu *svc = unit->priv;
     struct csched2_dom * const sdom = svc->sdom;
     spinlock_t *lock;
 
@@ -3887,7 +3887,7 @@ csched2_switch_sched(struct scheduler *new_ops, unsigned 
int cpu,
     ASSERT(!local_irq_is_enabled());
     write_lock(&prv->lock);
 
-    idle_vcpu[cpu]->sched_priv = vdata;
+    idle_vcpu[cpu]->sched_unit->priv = vdata;
 
     rqi = init_pdata(prv, pdata, cpu);
 
diff --git a/xen/common/sched_null.c b/xen/common/sched_null.c
index bf52c84b0f..b622c4d7dc 100644
--- a/xen/common/sched_null.c
+++ b/xen/common/sched_null.c
@@ -117,7 +117,7 @@ static inline struct null_private *null_priv(const struct 
scheduler *ops)
 
 static inline struct null_vcpu *null_vcpu(const struct vcpu *v)
 {
-    return v->sched_priv;
+    return v->sched_unit->priv;
 }
 
 static inline bool vcpu_check_affinity(struct vcpu *v, unsigned int cpu,
@@ -392,7 +392,7 @@ static spinlock_t *null_switch_sched(struct scheduler 
*new_ops,
 
     ASSERT(nvc && is_idle_vcpu(nvc->vcpu));
 
-    idle_vcpu[cpu]->sched_priv = vdata;
+    idle_vcpu[cpu]->sched_unit->priv = vdata;
 
     /*
      * We are holding the runqueue lock already (it's been taken in
diff --git a/xen/common/sched_rt.c b/xen/common/sched_rt.c
index 63ec732157..700ee9353e 100644
--- a/xen/common/sched_rt.c
+++ b/xen/common/sched_rt.c
@@ -235,7 +235,7 @@ static inline struct rt_private *rt_priv(const struct 
scheduler *ops)
 
 static inline struct rt_vcpu *rt_vcpu(const struct vcpu *vcpu)
 {
-    return vcpu->sched_priv;
+    return vcpu->sched_unit->priv;
 }
 
 static inline struct list_head *rt_runq(const struct scheduler *ops)
@@ -761,7 +761,7 @@ rt_switch_sched(struct scheduler *new_ops, unsigned int cpu,
         dprintk(XENLOG_DEBUG, "RTDS: timer initialized on cpu %u\n", cpu);
     }
 
-    idle_vcpu[cpu]->sched_priv = vdata;
+    idle_vcpu[cpu]->sched_unit->priv = vdata;
 
     return &prv->lock;
 }
diff --git a/xen/common/schedule.c b/xen/common/schedule.c
index 3ff88096d8..86a43f7192 100644
--- a/xen/common/schedule.c
+++ b/xen/common/schedule.c
@@ -269,8 +269,8 @@ int sched_init_vcpu(struct vcpu *v, unsigned int processor)
     init_timer(&v->poll_timer, poll_timer_fn,
                v, v->processor);
 
-    v->sched_priv = sched_alloc_vdata(dom_scheduler(d), unit, d->sched_priv);
-    if ( v->sched_priv == NULL )
+    unit->priv = sched_alloc_vdata(dom_scheduler(d), unit, d->sched_priv);
+    if ( unit->priv == NULL )
     {
         v->sched_unit = NULL;
         xfree(unit);
@@ -365,7 +365,7 @@ int sched_move_domain(struct domain *d, struct cpupool *c)
     {
         spinlock_t *lock;
 
-        vcpudata = v->sched_priv;
+        vcpudata = v->sched_unit->priv;
 
         migrate_timer(&v->periodic_timer, new_p);
         migrate_timer(&v->singleshot_timer, new_p);
@@ -383,7 +383,7 @@ int sched_move_domain(struct domain *d, struct cpupool *c)
          */
         spin_unlock_irq(lock);
 
-        v->sched_priv = vcpu_priv[v->vcpu_id];
+        v->sched_unit->priv = vcpu_priv[v->vcpu_id];
         if ( !d->is_dying )
             sched_move_irqs(v);
 
@@ -415,7 +415,7 @@ void sched_destroy_vcpu(struct vcpu *v)
     if ( test_and_clear_bool(v->is_urgent) )
         atomic_dec(&per_cpu(schedule_data, v->processor).urgent_count);
     sched_remove_unit(vcpu_scheduler(v), unit);
-    sched_free_vdata(vcpu_scheduler(v), v->sched_priv);
+    sched_free_vdata(vcpu_scheduler(v), unit->priv);
     xfree(unit);
     v->sched_unit = NULL;
 }
@@ -1593,6 +1593,7 @@ static int cpu_schedule_up(unsigned int cpu)
     else
     {
         struct vcpu *idle = idle_vcpu[cpu];
+        struct sched_unit *unit = idle->sched_unit;
 
         /*
          * During (ACPI?) suspend the idle vCPU for this pCPU is not freed,
@@ -1604,11 +1605,10 @@ static int cpu_schedule_up(unsigned int cpu)
          * with a different scheduler, it is schedule_cpu_switch(), invoked
          * later, that will set things up as appropriate.
          */
-        ASSERT(idle->sched_priv == NULL);
+        ASSERT(unit->priv == NULL);
 
-        idle->sched_priv = sched_alloc_vdata(&ops, idle->sched_unit,
-                                             idle->domain->sched_priv);
-        if ( idle->sched_priv == NULL )
+        unit->priv = sched_alloc_vdata(&ops, unit, idle->domain->sched_priv);
+        if ( unit->priv == NULL )
             return -ENOMEM;
     }
     if ( idle_vcpu[cpu] == NULL )
@@ -1634,9 +1634,9 @@ static void cpu_schedule_down(unsigned int cpu)
     struct scheduler *sched = per_cpu(scheduler, cpu);
 
     sched_free_pdata(sched, sd->sched_priv, cpu);
-    sched_free_vdata(sched, idle_vcpu[cpu]->sched_priv);
+    sched_free_vdata(sched, idle_vcpu[cpu]->sched_unit->priv);
 
-    idle_vcpu[cpu]->sched_priv = NULL;
+    idle_vcpu[cpu]->sched_unit->priv = NULL;
     sd->sched_priv = NULL;
 
     kill_timer(&sd->s_timer);
@@ -1886,7 +1886,7 @@ int schedule_cpu_switch(unsigned int cpu, struct cpupool 
*c)
      */
     old_lock = pcpu_schedule_lock_irq(cpu);
 
-    vpriv_old = idle->sched_priv;
+    vpriv_old = idle->sched_unit->priv;
     ppriv_old = sd->sched_priv;
     new_lock = sched_switch_sched(new_ops, cpu, ppriv, vpriv);
 
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index e8ea42e867..f549ad60d1 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -162,7 +162,6 @@ struct vcpu
     struct timer     poll_timer;    /* timeout for SCHEDOP_poll */
 
     struct sched_unit *sched_unit;
-    void            *sched_priv;    /* scheduler-specific data */
 
     struct vcpu_runstate_info runstate;
 #ifndef CONFIG_COMPAT
@@ -279,6 +278,7 @@ struct vcpu
 
 struct sched_unit {
     struct vcpu           *vcpu;
+    void                  *priv;      /* scheduler private data */
 };
 
 /* Per-domain lock can be recursively acquired in fault handlers. */
-- 
2.16.4


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