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Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c46
1 files changed, 30 insertions, 16 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index d057c0cbd245..07771da85de5 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -44,18 +44,19 @@ static void pic_clear_isr(struct kvm_kpic_state *s, int irq)
* Other interrupt may be delivered to PIC while lock is dropped but
* it should be safe since PIC state is already updated at this stage.
*/
- spin_unlock(&s->pics_state->lock);
+ raw_spin_unlock(&s->pics_state->lock);
kvm_notify_acked_irq(s->pics_state->kvm, SELECT_PIC(irq), irq);
- spin_lock(&s->pics_state->lock);
+ raw_spin_lock(&s->pics_state->lock);
}
void kvm_pic_clear_isr_ack(struct kvm *kvm)
{
struct kvm_pic *s = pic_irqchip(kvm);
- spin_lock(&s->lock);
+
+ raw_spin_lock(&s->lock);
s->pics[0].isr_ack = 0xff;
s->pics[1].isr_ack = 0xff;
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
}
/*
@@ -156,9 +157,9 @@ static void pic_update_irq(struct kvm_pic *s)
void kvm_pic_update_irq(struct kvm_pic *s)
{
- spin_lock(&s->lock);
+ raw_spin_lock(&s->lock);
pic_update_irq(s);
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
}
int kvm_pic_set_irq(void *opaque, int irq, int level)
@@ -166,14 +167,14 @@ int kvm_pic_set_irq(void *opaque, int irq, int level)
struct kvm_pic *s = opaque;
int ret = -1;
- spin_lock(&s->lock);
+ raw_spin_lock(&s->lock);
if (irq >= 0 && irq < PIC_NUM_PINS) {
ret = pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
pic_update_irq(s);
trace_kvm_pic_set_irq(irq >> 3, irq & 7, s->pics[irq >> 3].elcr,
s->pics[irq >> 3].imr, ret == 0);
}
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
return ret;
}
@@ -203,7 +204,7 @@ int kvm_pic_read_irq(struct kvm *kvm)
int irq, irq2, intno;
struct kvm_pic *s = pic_irqchip(kvm);
- spin_lock(&s->lock);
+ raw_spin_lock(&s->lock);
irq = pic_get_irq(&s->pics[0]);
if (irq >= 0) {
pic_intack(&s->pics[0], irq);
@@ -228,7 +229,7 @@ int kvm_pic_read_irq(struct kvm *kvm)
intno = s->pics[0].irq_base + irq;
}
pic_update_irq(s);
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
return intno;
}
@@ -442,7 +443,7 @@ static int picdev_write(struct kvm_io_device *this,
printk(KERN_ERR "PIC: non byte write\n");
return 0;
}
- spin_lock(&s->lock);
+ raw_spin_lock(&s->lock);
switch (addr) {
case 0x20:
case 0x21:
@@ -455,7 +456,7 @@ static int picdev_write(struct kvm_io_device *this,
elcr_ioport_write(&s->pics[addr & 1], addr, data);
break;
}
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
return 0;
}
@@ -472,7 +473,7 @@ static int picdev_read(struct kvm_io_device *this,
printk(KERN_ERR "PIC: non byte read\n");
return 0;
}
- spin_lock(&s->lock);
+ raw_spin_lock(&s->lock);
switch (addr) {
case 0x20:
case 0x21:
@@ -486,7 +487,7 @@ static int picdev_read(struct kvm_io_device *this,
break;
}
*(unsigned char *)val = data;
- spin_unlock(&s->lock);
+ raw_spin_unlock(&s->lock);
return 0;
}
@@ -520,7 +521,7 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
s = kzalloc(sizeof(struct kvm_pic), GFP_KERNEL);
if (!s)
return NULL;
- spin_lock_init(&s->lock);
+ raw_spin_lock_init(&s->lock);
s->kvm = kvm;
s->pics[0].elcr_mask = 0xf8;
s->pics[1].elcr_mask = 0xde;
@@ -533,7 +534,9 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
* Initialize PIO device
*/
kvm_iodevice_init(&s->dev, &picdev_ops);
- ret = kvm_io_bus_register_dev(kvm, &kvm->pio_bus, &s->dev);
+ mutex_lock(&kvm->slots_lock);
+ ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, &s->dev);
+ mutex_unlock(&kvm->slots_lock);
if (ret < 0) {
kfree(s);
return NULL;
@@ -541,3 +544,14 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
return s;
}
+
+void kvm_destroy_pic(struct kvm *kvm)
+{
+ struct kvm_pic *vpic = kvm->arch.vpic;
+
+ if (vpic) {
+ kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev);
+ kvm->arch.vpic = NULL;
+ kfree(vpic);
+ }
+}