KVM: fold kvm_pit_timer into kvm_kpit_state

One structure nests inside the other, providing no value at all.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

3 files changed, 31 insertions, 37 deletions

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index a9e187a5b199..11300d2fa714 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -108,7 +108,7 @@ static s64 __kpit_elapsed(struct kvm *kvm)
         ktime_t remaining;
         struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
 
-        if (!ps->pit_timer.period)
+        if (!ps->period)
                 return 0;
 
         /*
@@ -120,9 +120,9 @@ static s64 __kpit_elapsed(struct kvm *kvm)
          * itself with the initial count and continues counting
          * from there.
          */
-        remaining = hrtimer_get_remaining(&ps->pit_timer.timer);
-        elapsed = ps->pit_timer.period - ktime_to_ns(remaining);
-        elapsed = mod_64(elapsed, ps->pit_timer.period);
+        remaining = hrtimer_get_remaining(&ps->timer);
+        elapsed = ps->period - ktime_to_ns(remaining);
+        elapsed = mod_64(elapsed, ps->period);
 
         return elapsed;
 }
@@ -238,12 +238,12 @@ static void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
         int value;
 
         spin_lock(&ps->inject_lock);
-        value = atomic_dec_return(&ps->pit_timer.pending);
+        value = atomic_dec_return(&ps->pending);
         if (value < 0)
                 /* spurious acks can be generated if, for example, the
                  * PIC is being reset.  Handle it gracefully here
                  */
-                atomic_inc(&ps->pit_timer.pending);
+                atomic_inc(&ps->pending);
         else if (value > 0)
                 /* in this case, we had multiple outstanding pit interrupts
                  * that we needed to inject.  Reinject
@@ -261,14 +261,14 @@ void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu)
         if (!kvm_vcpu_is_bsp(vcpu) || !pit)
                 return;
 
-        timer = &pit->pit_state.pit_timer.timer;
+        timer = &pit->pit_state.timer;
         if (hrtimer_cancel(timer))
                 hrtimer_start_expires(timer, HRTIMER_MODE_ABS);
 }
 
 static void destroy_pit_timer(struct kvm_pit *pit)
 {
-        hrtimer_cancel(&pit->pit_state.pit_timer.timer);
+        hrtimer_cancel(&pit->pit_state.timer);
         flush_kthread_work(&pit->expired);
 }
 
@@ -311,16 +311,16 @@ static void pit_do_work(struct kthread_work *work)
 
 static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
 {
-        struct kvm_pit_timer *ktimer = container_of(data, struct kvm_pit_timer, timer);
-        struct kvm_pit *pt = ktimer->kvm->arch.vpit;
+        struct kvm_kpit_state *ps = container_of(data, struct kvm_kpit_state, timer);
+        struct kvm_pit *pt = ps->kvm->arch.vpit;
 
-        if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
-                atomic_inc(&ktimer->pending);
+        if (ps->reinject || !atomic_read(&ps->pending)) {
+                atomic_inc(&ps->pending);
                 queue_kthread_work(&pt->worker, &pt->expired);
         }
 
-        if (pt->pit_state.is_periodic) {
-                hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
+        if (ps->is_periodic) {
+                hrtimer_add_expires_ns(&ps->timer, ps->period);
                 return HRTIMER_RESTART;
         } else
                 return HRTIMER_NORESTART;
@@ -329,7 +329,6 @@ static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
 static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
 {
         struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
-        struct kvm_pit_timer *pt = &ps->pit_timer;
         s64 interval;
 
         if (!irqchip_in_kernel(kvm) || ps->flags & KVM_PIT_FLAGS_HPET_LEGACY)
@@ -340,18 +339,18 @@ static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
         pr_debug("create pit timer, interval is %llu nsec\n", interval);
 
         /* TODO The new value only affected after the retriggered */
-        hrtimer_cancel(&pt->timer);
+        hrtimer_cancel(&ps->timer);
         flush_kthread_work(&ps->pit->expired);
-        pt->period = interval;
+        ps->period = interval;
         ps->is_periodic = is_period;
 
-        pt->timer.function = pit_timer_fn;
-        pt->kvm = ps->pit->kvm;
+        ps->timer.function = pit_timer_fn;
+        ps->kvm = ps->pit->kvm;
 
-        atomic_set(&pt->pending, 0);
+        atomic_set(&ps->pending, 0);
         ps->irq_ack = 1;
 
-        hrtimer_start(&pt->timer, ktime_add_ns(ktime_get(), interval),
+        hrtimer_start(&ps->timer, ktime_add_ns(ktime_get(), interval),
                       HRTIMER_MODE_ABS);
 }
 
@@ -627,7 +626,7 @@ void kvm_pit_reset(struct kvm_pit *pit)
         }
         mutex_unlock(&pit->pit_state.lock);
 
-        atomic_set(&pit->pit_state.pit_timer.pending, 0);
+        atomic_set(&pit->pit_state.pending, 0);
         pit->pit_state.irq_ack = 1;
 }
 
@@ -636,7 +635,7 @@ static void pit_mask_notifer(struct kvm_irq_mask_notifier *kimn, bool mask)
         struct kvm_pit *pit = container_of(kimn, struct kvm_pit, mask_notifier);
 
         if (!mask) {
-                atomic_set(&pit->pit_state.pit_timer.pending, 0);
+                atomic_set(&pit->pit_state.pending, 0);
                 pit->pit_state.irq_ack = 1;
         }
 }
@@ -694,12 +693,11 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
 
         pit_state = &pit->pit_state;
         pit_state->pit = pit;
-        hrtimer_init(&pit_state->pit_timer.timer,
-                     CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+        hrtimer_init(&pit_state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
         pit_state->irq_ack_notifier.gsi = 0;
         pit_state->irq_ack_notifier.irq_acked = kvm_pit_ack_irq;
         kvm_register_irq_ack_notifier(kvm, &pit_state->irq_ack_notifier);
-        pit_state->pit_timer.reinject = true;
+        pit_state->reinject = true;
         mutex_unlock(&pit->pit_state.lock);
 
         kvm_pit_reset(pit);
@@ -749,7 +747,7 @@ void kvm_free_pit(struct kvm *kvm)
                 kvm_unregister_irq_ack_notifier(kvm,
                                 &kvm->arch.vpit->pit_state.irq_ack_notifier);
                 mutex_lock(&kvm->arch.vpit->pit_state.lock);
-                timer = &kvm->arch.vpit->pit_state.pit_timer.timer;
+                timer = &kvm->arch.vpit->pit_state.timer;
                 hrtimer_cancel(timer);
                 flush_kthread_work(&kvm->arch.vpit->expired);
                 kthread_stop(kvm->arch.vpit->worker_task);
diff --git a/arch/x86/kvm/i8254.h b/arch/x86/kvm/i8254.h
index c9bbcb889c40..dd1b16b611b0 100644
--- a/arch/x86/kvm/i8254.h
+++ b/arch/x86/kvm/i8254.h
@@ -21,19 +21,15 @@ struct kvm_kpit_channel_state {
         ktime_t count_load_time;
 };
 
-struct kvm_pit_timer {
-        struct hrtimer timer;
-        s64 period;                             /* unit: ns */
-        atomic_t pending;                       /* accumulated triggered timers */
-        bool reinject;
-        struct kvm *kvm;
-};
-
 struct kvm_kpit_state {
         struct kvm_kpit_channel_state channels[3];
         u32 flags;
-        struct kvm_pit_timer pit_timer;
         bool is_periodic;
+        s64 period;                             /* unit: ns */
+        struct hrtimer timer;
+        atomic_t pending;                       /* accumulated triggered timers */
+        bool reinject;
+        struct kvm *kvm;
         u32    speaker_data_on;
         struct mutex lock;
         struct kvm_pit *pit;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b6379e55ee27..3a53bcc24f20 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3082,7 +3082,7 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm,
         if (!kvm->arch.vpit)
                 return -ENXIO;
         mutex_lock(&kvm->arch.vpit->pit_state.lock);
-        kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
+        kvm->arch.vpit->pit_state.reinject = control->pit_reinject;
         mutex_unlock(&kvm->arch.vpit->pit_state.lock);
         return 0;
 }