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16#ifndef __KVM_IODEV_H__
17#define __KVM_IODEV_H__
18
19#include <linux/kvm_types.h>
20#include <asm/errno.h>
21
22struct kvm_io_device;
23
24
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27
28
29struct kvm_io_device_ops {
30 int (*read)(struct kvm_io_device *this,
31 gpa_t addr,
32 int len,
33 void *val);
34 int (*write)(struct kvm_io_device *this,
35 gpa_t addr,
36 int len,
37 const void *val);
38 void (*destructor)(struct kvm_io_device *this);
39};
40
41
42struct kvm_io_device {
43 const struct kvm_io_device_ops *ops;
44};
45
46static inline void kvm_iodevice_init(struct kvm_io_device *dev,
47 const struct kvm_io_device_ops *ops)
48{
49 dev->ops = ops;
50}
51
52static inline int kvm_iodevice_read(struct kvm_io_device *dev,
53 gpa_t addr, int l, void *v)
54{
55 return dev->ops->read ? dev->ops->read(dev, addr, l, v) : -EOPNOTSUPP;
56}
57
58static inline int kvm_iodevice_write(struct kvm_io_device *dev,
59 gpa_t addr, int l, const void *v)
60{
61 return dev->ops->write ? dev->ops->write(dev, addr, l, v) : -EOPNOTSUPP;
62}
63
64static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
65{
66 if (dev->ops->destructor)
67 dev->ops->destructor(dev);
68}
69
70#endif
71