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| author | Gregory Haskins <ghaskins@novell.com> | 2009-06-01 12:54:50 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:45 +0300 |
| commit | d76685c4a074041ed168e0b04dd604c3df5dcaa5 (patch) | |
| tree | 828fb3a57b7829530904318a0ad9d006e21408ad /virt/kvm/coalesced_mmio.c | |
| parent | 787a660a4f03325a0e00493ac39017e53fd345fa (diff) | |
| download | lwn-d76685c4a074041ed168e0b04dd604c3df5dcaa5.tar.gz lwn-d76685c4a074041ed168e0b04dd604c3df5dcaa5.zip | |
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/coalesced_mmio.c')
| -rw-r--r-- | virt/kvm/coalesced_mmio.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c index 03ea2807b1f2..c4c7ec2f9d30 100644 --- a/virt/kvm/coalesced_mmio.c +++ b/virt/kvm/coalesced_mmio.c @@ -14,11 +14,15 @@ #include "coalesced_mmio.h" +static inline struct kvm_coalesced_mmio_dev *to_mmio(struct kvm_io_device *dev) +{ + return container_of(dev, struct kvm_coalesced_mmio_dev, dev); +} + static int coalesced_mmio_in_range(struct kvm_io_device *this, gpa_t addr, int len, int is_write) { - struct kvm_coalesced_mmio_dev *dev = - (struct kvm_coalesced_mmio_dev*)this->private; + struct kvm_coalesced_mmio_dev *dev = to_mmio(this); struct kvm_coalesced_mmio_zone *zone; int next; int i; @@ -63,8 +67,7 @@ static int coalesced_mmio_in_range(struct kvm_io_device *this, static void coalesced_mmio_write(struct kvm_io_device *this, gpa_t addr, int len, const void *val) { - struct kvm_coalesced_mmio_dev *dev = - (struct kvm_coalesced_mmio_dev*)this->private; + struct kvm_coalesced_mmio_dev *dev = to_mmio(this); struct kvm_coalesced_mmio_ring *ring = dev->kvm->coalesced_mmio_ring; /* kvm->lock must be taken by caller before call to in_range()*/ @@ -80,12 +83,17 @@ static void coalesced_mmio_write(struct kvm_io_device *this, static void coalesced_mmio_destructor(struct kvm_io_device *this) { - struct kvm_coalesced_mmio_dev *dev = - (struct kvm_coalesced_mmio_dev *)this->private; + struct kvm_coalesced_mmio_dev *dev = to_mmio(this); kfree(dev); } +static const struct kvm_io_device_ops coalesced_mmio_ops = { + .write = coalesced_mmio_write, + .in_range = coalesced_mmio_in_range, + .destructor = coalesced_mmio_destructor, +}; + int kvm_coalesced_mmio_init(struct kvm *kvm) { struct kvm_coalesced_mmio_dev *dev; @@ -93,10 +101,7 @@ int kvm_coalesced_mmio_init(struct kvm *kvm) dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL); if (!dev) return -ENOMEM; - dev->dev.write = coalesced_mmio_write; - dev->dev.in_range = coalesced_mmio_in_range; - dev->dev.destructor = coalesced_mmio_destructor; - dev->dev.private = dev; + kvm_iodevice_init(&dev->dev, &coalesced_mmio_ops); dev->kvm = kvm; kvm->coalesced_mmio_dev = dev; kvm_io_bus_register_dev(&kvm->mmio_bus, &dev->dev); |