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KVM: cleanup io_device code

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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>
This commit is contained in:
Gregory Haskins
2009-06-01 12:54:50 -04:00
committed by Avi Kivity
parent 787a660a4f
commit d76685c4a0
8 changed files with 110 additions and 54 deletions
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22
arch/x86/kvm/lapic.c
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@@ -522,10 +522,15 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
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_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val)
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 void apic_mmio_write(struct kvm_io_device *this,
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 @@ static struct kvm_timer_ops lapic_timer_ops = {
.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 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
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: