From: Sheng Yang

Separate the reset part and prepare for reset support.

Signed-off-by: Sheng Yang
Signed-off-by: Avi Kivity
---
arch/x86/kvm/i8254.c | 30 +++++++++++++++++++-----------
arch/x86/kvm/i8254.h | 1 +
2 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 7776f50..06a241a 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -476,12 +476,28 @@ static int speaker_in_range(struct kvm_io_device *this, gpa_t addr)
return (addr == KVM_SPEAKER_BASE_ADDRESS);
}

-struct kvm_pit *kvm_create_pit(struct kvm *kvm)
+void kvm_pit_reset(struct kvm_pit *pit)
{
int i;
+ struct kvm_kpit_channel_state *c;
+
+ mutex_lock(&pit->pit_state.lock);
+ for (i = 0; i < 3; i++) {
+ c = &pit->pit_state.channels[i];
+ c->mode = 0xff;
+ c->gate = (i != 2);
+ pit_load_count(pit->kvm, i, 0);
+ }
+ mutex_unlock(&pit->pit_state.lock);
+
+ atomic_set(&pit->pit_state.pit_timer.pending, 0);
+ pit->pit_state.inject_pending = 1;
+}
+
+struct kvm_pit *kvm_create_pit(struct kvm *kvm)
+{
struct kvm_pit *pit;
struct kvm_kpit_state *pit_state;
- struct kvm_kpit_channel_state *c;

pit = kzalloc(sizeof(struct kvm_pit), GFP_KERNEL);
if (!pit)
@@ -510,17 +526,9 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm)
pit_state->pit = pit;
hrtimer_init(&pit_state->pit_timer.timer,
CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
- atomic_set(&pit_state->pit_timer.pending, 0);
- for (i = 0; i < 3; i++) {
- c = &pit_state->channels[i];
- c->mode = 0xff;
- c->gate = (i != 2);
- pit_load_count(kvm, i, 0);
- }
-
mutex_unlock(&pit->pit_state.lock);

- pit->pit_state.inject_pending = 1;
+ kvm_pit_reset(pit);

return pit;
}
diff --git a/arch/x86/kvm/i8254.h b/arch/x86/kvm/i8254.h
index 586bbf0..e63ef38 100644
--- a/arch/x86/kvm/i8254.h
+++ b/arch/x86/kvm/i8254.h
@@ -57,5 +57,6 @@ void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec);
void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val);
struct kvm_pit *kvm_create_pit(struct kvm *kvm);
void kvm_free_pit(struct kvm *kvm);
+void kvm_pit_reset(struct kvm_pit *pit);

#endif
--
1.5.4.5

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