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authorMichael S. Tsirkin <mst@redhat.com>2009-06-29 22:24:26 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:33:05 +0300
commit6c474694530f377507f9aca438c17206e051e6e7 (patch)
tree11590f6cca777716e7dfbc16c2d98fc7d64c11b0 /arch
parent108b56690f35e083c5559116d6656f59a557a815 (diff)
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KVM: convert bus to slots_lock
Use slots_lock to protect device list on the bus. slots_lock is already taken for read everywhere, so we only need to take it for write when registering devices. This is in preparation to removing in_range and kvm->lock around it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/i8254.c5
-rw-r--r--arch/x86/kvm/i8259.c2
2 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index bcd00c76d69e..4082cdd468ed 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -583,6 +583,7 @@ static const struct kvm_io_device_ops speaker_dev_ops = {
.in_range = speaker_in_range,
};
+/* Caller must have writers lock on slots_lock */
struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
{
struct kvm_pit *pit;
@@ -621,11 +622,11 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
kvm_register_irq_mask_notifier(kvm, 0, &pit->mask_notifier);
kvm_iodevice_init(&pit->dev, &pit_dev_ops);
- kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);
+ __kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);
if (flags & KVM_PIT_SPEAKER_DUMMY) {
kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
- kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);
+ __kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);
}
return pit;
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 148c52a608d6..1851aec8a7da 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -548,6 +548,6 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
* Initialize PIO device
*/
kvm_iodevice_init(&s->dev, &picdev_ops);
- kvm_io_bus_register_dev(&kvm->pio_bus, &s->dev);
+ kvm_io_bus_register_dev(kvm, &kvm->pio_bus, &s->dev);
return s;
}