linux-kernel - [PATCH v3 03/16] KVM: x86: add kvm_pit_reset

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Message-Id: <1456955813-1560-4-git-send-email-radimkrcmar@hpx.cz>
Date:	Wed,  2 Mar 2016 22:56:40 +0100
From:	Radim Krčmář <radimkrcmar@....cz>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
	Yuki Shibuya <shibuya.yk@...s.nec.co.jp>
Subject: [PATCH v3 03/16] KVM: x86: add kvm_pit_reset_reinject

From: Radim Krčmář <rkrcmar@...hat.com>

pit_state.pending and pit_state.irq_ack are always reset at the same
time.  Create a function for them.

Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
---
 arch/x86/kvm/i8254.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 7d694ac7f4a4..bdbb3f076e72 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -321,6 +321,12 @@ static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
 		return HRTIMER_NORESTART;
 }
 
+static inline void kvm_pit_reset_reinject(struct kvm_pit *pit)
+{
+	atomic_set(&pit->pit_state.pending, 0);
+	pit->pit_state.irq_ack = 1;
+}
+
 static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
 {
 	struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
@@ -343,8 +349,7 @@ static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
 	ps->timer.function = pit_timer_fn;
 	ps->kvm = ps->pit->kvm;
 
-	atomic_set(&ps->pending, 0);
-	ps->irq_ack = 1;
+	kvm_pit_reset_reinject(ps->pit);
 
 	/*
 	 * Do not allow the guest to program periodic timers with small
@@ -644,18 +649,15 @@ void kvm_pit_reset(struct kvm_pit *pit)
 	}
 	mutex_unlock(&pit->pit_state.lock);
 
-	atomic_set(&pit->pit_state.pending, 0);
-	pit->pit_state.irq_ack = 1;
+	kvm_pit_reset_reinject(pit);
 }
 
 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.pending, 0);
-		pit->pit_state.irq_ack = 1;
-	}
+	if (!mask)
+		kvm_pit_reset_reinject(pit);
 }
 
 static const struct kvm_io_device_ops pit_dev_ops = {
-- 
2.7.2