Read Cortex A15 Performance Counter from User Space - arm

Question

I am trying to read the performance counters (cycle and event count registers) of my ARM big.LITTLE. It consists of 4 Cortex A7 and 4 Cortex A 15 Cores. I have no problems reading the values of the performance counters if I set my tested task on the A7 core but if I want to test the same task on Cortex A15 I get an "illegal instruction". I put the code for enabling the counters below.
I think its because my kernelmodule only enables the performance counter of the A7 to userspace. But I can't figure out how to enable the counters of the A15 to userspace.
Does someone have an idea how I could do it?
I appreciate any help.
#define PERF_DEF_OPTS (1 | 16)
#define DRVR_NAME "enable_arm_pmu"
static void enable_cpu_counter(void* data){
/*Enable counters to user land*/
__asm__("MCR p15, 0, %0, c9, c14, 0" :: "r"(1));
__asm__("MCR p15, 0, %0, c9, c12, 0" :: "r"(PERF_DEF_OPTS));
__asm__ ("MCR p15, 0, %0, c9, c12, 1" :: "r"(0x8000000f));
}
static void disable_cpu_counter(void* data){
__asm__("MCR p15, 0, %0, c9, c14, 0" :: "r"(0));
__asm__("MCR p15, 0, %0, c9, c12, 0" :: "r"(PERF_DEF_OPTS));
__asm__ ("MCR p15, 0, %0, c9, c12, 1" :: "r"(0x8000000f));
}
static int hello_init(void)
{
printk(KERN_ALERT "Performance counter enable\n");
on_each_cpu(enable_cpu_counter, NULL, 1);
printk(KERN_INFO "[" DRVR_NAME "] initialised");
return 0;
}
static void hello_exit(void)
{
printk(KERN_ALERT "Performance counter disabled\n");
on_each_cpu(disable_cpu_counter, NULL, 1);
printk(KERN_INFO "[" DRVR_NAME "] unloaded");
}
module_init(hello_init);
module_exit(hello_exit);
`