KVM: cleanup io_device code
We modernize the io_device code so that we use container_of() instead of
dev->private, and move the vtable to a separate ops structure
(theoretically allows better caching for multiple instances of the same
ops structure)
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 0990bc9..e800d2d 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -350,10 +350,20 @@
mutex_unlock(&kvm->arch.vpit->pit_state.lock);
}
+static inline struct kvm_pit *dev_to_pit(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_pit, dev);
+}
+
+static inline struct kvm_pit *speaker_to_pit(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_pit, speaker_dev);
+}
+
static void pit_ioport_write(struct kvm_io_device *this,
gpa_t addr, int len, const void *data)
{
- struct kvm_pit *pit = (struct kvm_pit *)this->private;
+ struct kvm_pit *pit = dev_to_pit(this);
struct kvm_kpit_state *pit_state = &pit->pit_state;
struct kvm *kvm = pit->kvm;
int channel, access;
@@ -426,7 +436,7 @@
static void pit_ioport_read(struct kvm_io_device *this,
gpa_t addr, int len, void *data)
{
- struct kvm_pit *pit = (struct kvm_pit *)this->private;
+ struct kvm_pit *pit = dev_to_pit(this);
struct kvm_kpit_state *pit_state = &pit->pit_state;
struct kvm *kvm = pit->kvm;
int ret, count;
@@ -497,7 +507,7 @@
static void speaker_ioport_write(struct kvm_io_device *this,
gpa_t addr, int len, const void *data)
{
- struct kvm_pit *pit = (struct kvm_pit *)this->private;
+ struct kvm_pit *pit = speaker_to_pit(this);
struct kvm_kpit_state *pit_state = &pit->pit_state;
struct kvm *kvm = pit->kvm;
u32 val = *(u32 *) data;
@@ -511,7 +521,7 @@
static void speaker_ioport_read(struct kvm_io_device *this,
gpa_t addr, int len, void *data)
{
- struct kvm_pit *pit = (struct kvm_pit *)this->private;
+ struct kvm_pit *pit = speaker_to_pit(this);
struct kvm_kpit_state *pit_state = &pit->pit_state;
struct kvm *kvm = pit->kvm;
unsigned int refresh_clock;
@@ -563,6 +573,18 @@
}
}
+static const struct kvm_io_device_ops pit_dev_ops = {
+ .read = pit_ioport_read,
+ .write = pit_ioport_write,
+ .in_range = pit_in_range,
+};
+
+static const struct kvm_io_device_ops speaker_dev_ops = {
+ .read = speaker_ioport_read,
+ .write = speaker_ioport_write,
+ .in_range = speaker_in_range,
+};
+
struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
{
struct kvm_pit *pit;
@@ -583,17 +605,11 @@
spin_lock_init(&pit->pit_state.inject_lock);
/* Initialize PIO device */
- pit->dev.read = pit_ioport_read;
- pit->dev.write = pit_ioport_write;
- pit->dev.in_range = pit_in_range;
- pit->dev.private = pit;
+ kvm_iodevice_init(&pit->dev, &pit_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);
if (flags & KVM_PIT_SPEAKER_DUMMY) {
- pit->speaker_dev.read = speaker_ioport_read;
- pit->speaker_dev.write = speaker_ioport_write;
- pit->speaker_dev.in_range = speaker_in_range;
- pit->speaker_dev.private = pit;
+ kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);
}
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 1ccb50c..2520922 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -444,10 +444,15 @@
}
}
+static inline struct kvm_pic *to_pic(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_pic, dev);
+}
+
static void picdev_write(struct kvm_io_device *this,
gpa_t addr, int len, const void *val)
{
- struct kvm_pic *s = this->private;
+ struct kvm_pic *s = to_pic(this);
unsigned char data = *(unsigned char *)val;
if (len != 1) {
@@ -474,7 +479,7 @@
static void picdev_read(struct kvm_io_device *this,
gpa_t addr, int len, void *val)
{
- struct kvm_pic *s = this->private;
+ struct kvm_pic *s = to_pic(this);
unsigned char data = 0;
if (len != 1) {
@@ -516,6 +521,12 @@
}
}
+static const struct kvm_io_device_ops picdev_ops = {
+ .read = picdev_read,
+ .write = picdev_write,
+ .in_range = picdev_in_range,
+};
+
struct kvm_pic *kvm_create_pic(struct kvm *kvm)
{
struct kvm_pic *s;
@@ -534,10 +545,7 @@
/*
* Initialize PIO device
*/
- s->dev.read = picdev_read;
- s->dev.write = picdev_write;
- s->dev.in_range = picdev_in_range;
- s->dev.private = s;
+ kvm_iodevice_init(&s->dev, &picdev_ops);
kvm_io_bus_register_dev(&kvm->pio_bus, &s->dev);
return s;
}
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index ae99d83..4bfd458 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -522,10 +522,15 @@
return val;
}
+static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_lapic, dev);
+}
+
static void apic_mmio_read(struct kvm_io_device *this,
gpa_t address, int len, void *data)
{
- struct kvm_lapic *apic = (struct kvm_lapic *)this->private;
+ struct kvm_lapic *apic = to_lapic(this);
unsigned int offset = address - apic->base_address;
unsigned char alignment = offset & 0xf;
u32 result;
@@ -606,7 +611,7 @@
static void apic_mmio_write(struct kvm_io_device *this,
gpa_t address, int len, const void *data)
{
- struct kvm_lapic *apic = (struct kvm_lapic *)this->private;
+ struct kvm_lapic *apic = to_lapic(this);
unsigned int offset = address - apic->base_address;
unsigned char alignment = offset & 0xf;
u32 val;
@@ -723,7 +728,7 @@
static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr,
int len, int size)
{
- struct kvm_lapic *apic = (struct kvm_lapic *)this->private;
+ struct kvm_lapic *apic = to_lapic(this);
int ret = 0;
@@ -917,6 +922,12 @@
.is_periodic = lapic_is_periodic,
};
+static const struct kvm_io_device_ops apic_mmio_ops = {
+ .read = apic_mmio_read,
+ .write = apic_mmio_write,
+ .in_range = apic_mmio_range,
+};
+
int kvm_create_lapic(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic;
@@ -951,10 +962,7 @@
vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE;
kvm_lapic_reset(vcpu);
- apic->dev.read = apic_mmio_read;
- apic->dev.write = apic_mmio_write;
- apic->dev.in_range = apic_mmio_range;
- apic->dev.private = apic;
+ kvm_iodevice_init(&apic->dev, &apic_mmio_ops);
return 0;
nomem_free_apic:
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5eb3b8d..75e9df0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2264,7 +2264,7 @@
if (vcpu->arch.apic) {
dev = &vcpu->arch.apic->dev;
- if (dev->in_range(dev, addr, len, is_write))
+ if (kvm_iodevice_in_range(dev, addr, len, is_write))
return dev;
}
return NULL;