summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/i8254.c
diff options
context:
space:
mode:
authorSheng Yang <sheng.yang@intel.com>2008-03-13 10:22:26 +0800
committerAvi Kivity <avi@qumranet.com>2008-04-27 12:00:23 +0300
commit308b0f239e8d6754b8b903d279e5b5b987e257ac (patch)
tree7d5787dd227874b89d1e5935080aa903dc7f1875 /arch/x86/kvm/i8254.c
parente0f63cb9277b64850854aee301762beeeb463473 (diff)
KVM: Add reset support for in kernel PIT
Separate the reset part and prepare for reset support. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/i8254.c')
-rw-r--r--arch/x86/kvm/i8254.c30
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 8642f9d1206a..9f118e2f350d 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -478,12 +478,28 @@ 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)
@@ -512,17 +528,9 @@ 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;
}