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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 /arch/x86/kvm/lapic.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 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index ae99d83f81a3..4bfd458a4f3e 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -522,10 +522,15 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset) return val; } +static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev) +{ + return container_of(dev, struct kvm_lapic, dev); +} + static void apic_mmio_read(struct kvm_io_device *this, gpa_t address, int len, void *data) { - struct kvm_lapic *apic = (struct kvm_lapic *)this->private; + struct kvm_lapic *apic = to_lapic(this); unsigned int offset = address - apic->base_address; unsigned char alignment = offset & 0xf; u32 result; @@ -606,7 +611,7 @@ static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val) static void apic_mmio_write(struct kvm_io_device *this, gpa_t address, int len, const void *data) { - struct kvm_lapic *apic = (struct kvm_lapic *)this->private; + struct kvm_lapic *apic = to_lapic(this); unsigned int offset = address - apic->base_address; unsigned char alignment = offset & 0xf; u32 val; @@ -723,7 +728,7 @@ static void apic_mmio_write(struct kvm_io_device *this, static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr, int len, int size) { - struct kvm_lapic *apic = (struct kvm_lapic *)this->private; + struct kvm_lapic *apic = to_lapic(this); int ret = 0; @@ -917,6 +922,12 @@ static struct kvm_timer_ops lapic_timer_ops = { .is_periodic = lapic_is_periodic, }; +static const struct kvm_io_device_ops apic_mmio_ops = { + .read = apic_mmio_read, + .write = apic_mmio_write, + .in_range = apic_mmio_range, +}; + int kvm_create_lapic(struct kvm_vcpu *vcpu) { struct kvm_lapic *apic; @@ -951,10 +962,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu) vcpu->arch.apic_base = APIC_DEFAULT_PHYS_BASE; kvm_lapic_reset(vcpu); - apic->dev.read = apic_mmio_read; - apic->dev.write = apic_mmio_write; - apic->dev.in_range = apic_mmio_range; - apic->dev.private = apic; + kvm_iodevice_init(&apic->dev, &apic_mmio_ops); return 0; nomem_free_apic: |