static ssize_t hwsampler_write(struct file *file, char const __user *buf,
size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval <= 0)
return retval;
if (val != 0 && val != 1)
return -EINVAL;
if (oprofile_started)
/*
* save to do without locking as we set
* hwsampler_running in start() when start_mutex is
* held
*/
return -EBUSY;
hwsampler_enabled = val;
return count;
}
static ssize_t timer_enabled_write(struct file *file, char const __user *buf,
size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval <= 0)
return retval;
if (val != 0 && val != 1)
return -EINVAL;
/* Timer cannot be disabled without having hardware sampling. */
if (val == 0 && !hwsampler_available)
return -EINVAL;
if (oprofile_started)
/*
* save to do without locking as we set
* hwsampler_running in start() when start_mutex is
* held
*/
return -EBUSY;
hwsampler_enabled = !val;
return count;
}
static ssize_t ulong_write_file(struct file * file, char const __user * buf, size_t count, loff_t * offset)
{
unsigned long * value = file->private_data;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(value, buf, count);
if (retval)
return retval;
return count;
}
static ssize_t hwsampler_zero_write(struct file *file, char const __user *buf,
size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval <= 0)
return retval;
if (val != 0)
return -EINVAL;
return count;
}
static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
retval = oprofile_set_backtrace(val);
if (retval)
return retval;
return count;
}
static ssize_t hw_interval_write(struct file *file, char const __user *buf,
size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval <= 0)
return retval;
if (val < oprofile_min_interval)
oprofile_hw_interval = oprofile_min_interval;
else if (val > oprofile_max_interval)
oprofile_hw_interval = oprofile_max_interval;
else
oprofile_hw_interval = val;
return count;
}
static ssize_t hwsampler_kernel_write(struct file *file, char const __user *buf,
size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
if (val != 0 && val != 1)
return -EINVAL;
counter_config.kernel = val;
return count;
}
static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
if (val)
retval = oprofile_start();
else
oprofile_stop();
if (retval)
return retval;
return count;
}
ssize_t ca_css_tgid_write(struct file * file, char const __user * buf, size_t count, loff_t * offset)
{
unsigned long val;
int retval;
if (*offset)
return -EINVAL;
if (!oprofile_ops.ca_css)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
retval = oprofile_set_ulong(&ca_css_tgid, val);
if (retval)
return retval;
return count;
}
static ssize_t sh7750_write_count(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
int counter = to_counter(file);
unsigned long val;
if (oprofilefs_ulong_from_user(&val, buf, count))
return -EFAULT;
/*
* Any write will clear the counter, although only 0 should be
* written for this purpose, as we do not support setting the
* counter to an arbitrary value.
*/
WARN_ON(val != 0);
if (counter == 0) {
ctrl_outw(ctrl_inw(PMCR1) | PMCR_PMCLR, PMCR1);
} else {
ctrl_outw(ctrl_inw(PMCR2) | PMCR_PMCLR, PMCR2);
}
return count;
}
static ssize_t enhanced_backtrace_write(struct file *file,
char const __user *buf, size_t count, loff_t *offset)
{
unsigned long val;
int retval = 0;
if (*offset)
return -EINVAL;
retval = oprofilefs_ulong_from_user(&val, buf, count);
if (retval)
return retval;
/* Allow for additional backtracing features, but for now the only
* additional capability is tracing across the system call boundary
*/
if (val & OPROFILE_SYSCALL_TRACE_ENABLE)
retval = oprofile_set_trace_thru_syscall(1);
if (retval)
return retval;
return count;
}
