*/
#include <linux/module.h>
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <asm/system.h>
-static struct class_simple *msr_class;
-
-/* Note: "err" is handled in a funny way below. Otherwise one version
- of gcc or another breaks. */
+static struct class *msr_class;
static inline int wrmsr_eio(u32 reg, u32 eax, u32 edx)
{
int err;
- asm volatile ("1: wrmsr\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- "3: movl %4,%0\n"
- " jmp 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n" " .long 1b,3b\n" ".previous":"=&bDS" (err)
- :"a"(eax), "d"(edx), "c"(reg), "i"(-EIO), "0"(0));
-
+ err = wrmsr_safe(reg, eax, edx);
+ if (err)
+ err = -EIO;
return err;
}
{
int err;
- asm volatile ("1: rdmsr\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- "3: movl %4,%0\n"
- " jmp 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 4\n"
- " .long 1b,3b\n"
- ".previous":"=&bDS" (err), "=a"(*eax), "=d"(*edx)
- :"c"(reg), "i"(-EIO), "0"(0));
-
+ err = rdmsr_safe(reg, eax, edx);
+ if (err)
+ err = -EIO;
return err;
}
{
u32 __user *tmp = (u32 __user *) buf;
u32 data[2];
- size_t rv;
u32 reg = *ppos;
- int cpu = iminor(file->f_dentry->d_inode);
+ int cpu = iminor(file->f_path.dentry->d_inode);
int err;
if (count % 8)
return -EINVAL; /* Invalid chunk size */
- for (rv = 0; count; count -= 8) {
+ for (; count; count -= 8) {
err = do_rdmsr(cpu, reg, &data[0], &data[1]);
if (err)
return err;
{
const u32 __user *tmp = (const u32 __user *)buf;
u32 data[2];
- size_t rv;
u32 reg = *ppos;
- int cpu = iminor(file->f_dentry->d_inode);
+ int cpu = iminor(file->f_path.dentry->d_inode);
int err;
if (count % 8)
return -EINVAL; /* Invalid chunk size */
- for (rv = 0; count; count -= 8) {
+ for (; count; count -= 8) {
if (copy_from_user(&data, tmp, 8))
return -EFAULT;
err = do_wrmsr(cpu, reg, data[0], data[1]);
static int msr_open(struct inode *inode, struct file *file)
{
- unsigned int cpu = iminor(file->f_dentry->d_inode);
+ unsigned int cpu = iminor(file->f_path.dentry->d_inode);
struct cpuinfo_x86 *c = &(cpu_data)[cpu];
if (cpu >= NR_CPUS || !cpu_online(cpu))
.open = msr_open,
};
-static int msr_class_simple_device_add(int i)
+static int msr_device_create(int i)
{
int err = 0;
- struct class_device *class_err;
+ struct device *dev;
- class_err = class_simple_device_add(msr_class, MKDEV(MSR_MAJOR, i), NULL, "msr%d",i);
- if (IS_ERR(class_err))
- err = PTR_ERR(class_err);
+ dev = device_create(msr_class, NULL, MKDEV(MSR_MAJOR, i), "msr%d",i);
+ if (IS_ERR(dev))
+ err = PTR_ERR(dev);
return err;
}
-static int __devinit msr_class_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
+static int msr_class_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
switch (action) {
case CPU_ONLINE:
- msr_class_simple_device_add(cpu);
+ msr_device_create(cpu);
break;
case CPU_DEAD:
- class_simple_device_remove(MKDEV(MSR_MAJOR, cpu));
+ device_destroy(msr_class, MKDEV(MSR_MAJOR, cpu));
break;
}
return NOTIFY_OK;
}
-static struct notifier_block msr_class_cpu_notifier =
+static struct notifier_block __cpuinitdata msr_class_cpu_notifier =
{
.notifier_call = msr_class_cpu_callback,
};
err = -EBUSY;
goto out;
}
- msr_class = class_simple_create(THIS_MODULE, "msr");
+ msr_class = class_create(THIS_MODULE, "msr");
if (IS_ERR(msr_class)) {
err = PTR_ERR(msr_class);
goto out_chrdev;
}
for_each_online_cpu(i) {
- err = msr_class_simple_device_add(i);
+ err = msr_device_create(i);
if (err != 0)
goto out_class;
}
- register_cpu_notifier(&msr_class_cpu_notifier);
+ register_hotcpu_notifier(&msr_class_cpu_notifier);
err = 0;
goto out;
out_class:
i = 0;
for_each_online_cpu(i)
- class_simple_device_remove(MKDEV(MSR_MAJOR, i));
- class_simple_destroy(msr_class);
+ device_destroy(msr_class, MKDEV(MSR_MAJOR, i));
+ class_destroy(msr_class);
out_chrdev:
unregister_chrdev(MSR_MAJOR, "cpu/msr");
out:
{
int cpu = 0;
for_each_online_cpu(cpu)
- class_simple_device_remove(MKDEV(MSR_MAJOR, cpu));
- class_simple_destroy(msr_class);
+ device_destroy(msr_class, MKDEV(MSR_MAJOR, cpu));
+ class_destroy(msr_class);
unregister_chrdev(MSR_MAJOR, "cpu/msr");
- unregister_cpu_notifier(&msr_class_cpu_notifier);
+ unregister_hotcpu_notifier(&msr_class_cpu_notifier);
}
module_init(msr_init);