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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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31
virt/kvm/iodev.h
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@@ -18,7 +18,9 @@
#include <linux/kvm_types.h>
struct kvm_io_device {
struct kvm_io_device;
struct kvm_io_device_ops {
void (*read)(struct kvm_io_device *this,
gpa_t addr,
int len,
@@ -30,16 +32,25 @@ struct kvm_io_device {
int (*in_range)(struct kvm_io_device *this, gpa_t addr, int len,
int is_write);
void (*destructor)(struct kvm_io_device *this);
void *private;
};
struct kvm_io_device {
const struct kvm_io_device_ops *ops;
};
static inline void kvm_iodevice_init(struct kvm_io_device *dev,
const struct kvm_io_device_ops *ops)
{
dev->ops = ops;
}
static inline void kvm_iodevice_read(struct kvm_io_device *dev,
gpa_t addr,
int len,
void *val)
{
dev->read(dev, addr, len, val);
dev->ops->read(dev, addr, len, val);
}
static inline void kvm_iodevice_write(struct kvm_io_device *dev,
@@ -47,19 +58,19 @@ static inline void kvm_iodevice_write(struct kvm_io_device *dev,
int len,
const void *val)
{
dev->write(dev, addr, len, val);
dev->ops->write(dev, addr, len, val);
}
static inline int kvm_iodevice_inrange(struct kvm_io_device *dev,
gpa_t addr, int len, int is_write)
static inline int kvm_iodevice_in_range(struct kvm_io_device *dev,
gpa_t addr, int len, int is_write)
{
return dev->in_range(dev, addr, len, is_write);
return dev->ops->in_range(dev, addr, len, is_write);
}
static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
{
if (dev->destructor)
dev->destructor(dev);
if (dev->ops->destructor)
dev->ops->destructor(dev);
}
#endif /* __KVM_IODEV_H__ */