diff options
Diffstat (limited to 'arch/x86/kvm/i8259.c')
| -rw-r--r-- | arch/x86/kvm/i8259.c | 108 |
1 files changed, 89 insertions, 19 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 19fe855e7953..6b869ce0cc19 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -459,15 +459,9 @@ static int picdev_in_range(gpa_t addr) } } -static inline struct kvm_pic *to_pic(struct kvm_io_device *dev) -{ - return container_of(dev, struct kvm_pic, dev); -} - -static int picdev_write(struct kvm_io_device *this, +static int picdev_write(struct kvm_pic *s, gpa_t addr, int len, const void *val) { - struct kvm_pic *s = to_pic(this); unsigned char data = *(unsigned char *)val; if (!picdev_in_range(addr)) return -EOPNOTSUPP; @@ -494,10 +488,9 @@ static int picdev_write(struct kvm_io_device *this, return 0; } -static int picdev_read(struct kvm_io_device *this, +static int picdev_read(struct kvm_pic *s, gpa_t addr, int len, void *val) { - struct kvm_pic *s = to_pic(this); unsigned char data = 0; if (!picdev_in_range(addr)) return -EOPNOTSUPP; @@ -525,6 +518,48 @@ static int picdev_read(struct kvm_io_device *this, return 0; } +static int picdev_master_write(struct kvm_io_device *dev, + gpa_t addr, int len, const void *val) +{ + return picdev_write(container_of(dev, struct kvm_pic, dev_master), + addr, len, val); +} + +static int picdev_master_read(struct kvm_io_device *dev, + gpa_t addr, int len, void *val) +{ + return picdev_read(container_of(dev, struct kvm_pic, dev_master), + addr, len, val); +} + +static int picdev_slave_write(struct kvm_io_device *dev, + gpa_t addr, int len, const void *val) +{ + return picdev_write(container_of(dev, struct kvm_pic, dev_slave), + addr, len, val); +} + +static int picdev_slave_read(struct kvm_io_device *dev, + gpa_t addr, int len, void *val) +{ + return picdev_read(container_of(dev, struct kvm_pic, dev_slave), + addr, len, val); +} + +static int picdev_eclr_write(struct kvm_io_device *dev, + gpa_t addr, int len, const void *val) +{ + return picdev_write(container_of(dev, struct kvm_pic, dev_eclr), + addr, len, val); +} + +static int picdev_eclr_read(struct kvm_io_device *dev, + gpa_t addr, int len, void *val) +{ + return picdev_read(container_of(dev, struct kvm_pic, dev_eclr), + addr, len, val); +} + /* * callback when PIC0 irq status changed */ @@ -537,9 +572,19 @@ static void pic_irq_request(struct kvm *kvm, int level) s->output = level; } -static const struct kvm_io_device_ops picdev_ops = { - .read = picdev_read, - .write = picdev_write, +static const struct kvm_io_device_ops picdev_master_ops = { + .read = picdev_master_read, + .write = picdev_master_write, +}; + +static const struct kvm_io_device_ops picdev_slave_ops = { + .read = picdev_slave_read, + .write = picdev_slave_write, +}; + +static const struct kvm_io_device_ops picdev_eclr_ops = { + .read = picdev_eclr_read, + .write = picdev_eclr_write, }; struct kvm_pic *kvm_create_pic(struct kvm *kvm) @@ -560,16 +605,39 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm) /* * Initialize PIO device */ - kvm_iodevice_init(&s->dev, &picdev_ops); + kvm_iodevice_init(&s->dev_master, &picdev_master_ops); + kvm_iodevice_init(&s->dev_slave, &picdev_slave_ops); + kvm_iodevice_init(&s->dev_eclr, &picdev_eclr_ops); mutex_lock(&kvm->slots_lock); - ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, &s->dev); + ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, 0x20, 2, + &s->dev_master); + if (ret < 0) + goto fail_unlock; + + ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, 0xa0, 2, &s->dev_slave); + if (ret < 0) + goto fail_unreg_2; + + ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, 0x4d0, 2, &s->dev_eclr); + if (ret < 0) + goto fail_unreg_1; + mutex_unlock(&kvm->slots_lock); - if (ret < 0) { - kfree(s); - return NULL; - } return s; + +fail_unreg_1: + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &s->dev_slave); + +fail_unreg_2: + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &s->dev_master); + +fail_unlock: + mutex_unlock(&kvm->slots_lock); + + kfree(s); + + return NULL; } void kvm_destroy_pic(struct kvm *kvm) @@ -577,7 +645,9 @@ void kvm_destroy_pic(struct kvm *kvm) struct kvm_pic *vpic = kvm->arch.vpic; if (vpic) { - kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev); + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev_master); + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev_slave); + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev_eclr); kvm->arch.vpic = NULL; kfree(vpic); } |