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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License. |
5 | * |
6 | * This program is distributed in the hope that it will be useful, |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
9 | * GNU General Public License for more details. |
10 | * |
11 | * You should have received a copy of the GNU General Public License |
12 | * along with this program; if not, write to the Free Software |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
14 | */ |
15 | |
16 | #ifndef __KVM_IODEV_H__ |
17 | #define __KVM_IODEV_H__ |
18 | |
19 | #include <linux/kvm_types.h> |
20 | #include <asm/errno.h> |
21 | |
22 | struct kvm_io_device; |
23 | |
24 | /** |
25 | * kvm_io_device_ops are called under kvm slots_lock. |
26 | * read and write handlers return 0 if the transaction has been handled, |
27 | * or non-zero to have it passed to the next device. |
28 | **/ |
29 | struct 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 | |
42 | struct kvm_io_device { |
43 | const struct kvm_io_device_ops *ops; |
44 | }; |
45 | |
46 | static 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 | |
52 | static 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 | |
58 | static 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 | |
64 | static 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 /* __KVM_IODEV_H__ */ |
71 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9