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Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c123
1 files changed, 97 insertions, 26 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 19fe855e795..cac4746d7ff 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -34,6 +34,9 @@
#include <linux/kvm_host.h>
#include "trace.h"
+#define pr_pic_unimpl(fmt, ...) \
+ pr_err_ratelimited("kvm: pic: " fmt, ## __VA_ARGS__)
+
static void pic_irq_request(struct kvm *kvm, int level);
static void pic_lock(struct kvm_pic *s)
@@ -306,10 +309,10 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
}
s->init_state = 1;
if (val & 0x02)
- printk(KERN_ERR "single mode not supported");
+ pr_pic_unimpl("single mode not supported");
if (val & 0x08)
- printk(KERN_ERR
- "level sensitive irq not supported");
+ pr_pic_unimpl(
+ "level sensitive irq not supported");
} else if (val & 0x08) {
if (val & 0x04)
s->poll = 1;
@@ -459,22 +462,15 @@ 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;
if (len != 1) {
- if (printk_ratelimit())
- printk(KERN_ERR "PIC: non byte write\n");
+ pr_pic_unimpl("non byte write\n");
return 0;
}
pic_lock(s);
@@ -494,17 +490,15 @@ 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;
if (len != 1) {
- if (printk_ratelimit())
- printk(KERN_ERR "PIC: non byte read\n");
+ pr_pic_unimpl("non byte read\n");
return 0;
}
pic_lock(s);
@@ -525,6 +519,48 @@ 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 +573,19 @@ 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 +606,39 @@ 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 +646,9 @@ 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);
}