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authorGregory Haskins <ghaskins@novell.com>2009-06-01 12:54:50 -0400
committerAvi Kivity <avi@redhat.com>2009-09-10 08:32:45 +0300
commitd76685c4a074041ed168e0b04dd604c3df5dcaa5 (patch)
tree828fb3a57b7829530904318a0ad9d006e21408ad /virt/kvm/iodev.h
parent787a660a4f03325a0e00493ac39017e53fd345fa (diff)
downloadlinux-linaro-stable-d76685c4a074041ed168e0b04dd604c3df5dcaa5.tar.gz
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>
Diffstat (limited to 'virt/kvm/iodev.h')
-rw-r--r--virt/kvm/iodev.h29
1 files changed, 20 insertions, 9 deletions
diff --git a/virt/kvm/iodev.h b/virt/kvm/iodev.h
index 55e8846ac3a6..2c67f5acd6db 100644
--- a/virt/kvm/iodev.h
+++ b/virt/kvm/iodev.h
@@ -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__ */