Reading uncore counters through perf_event_open - c

Question

I'm writing a program to monitor uncore events using perf_event_open. I needed to monitor the uncore_cha type, but perf event open gives an invalid argument error.
According to the perf_event_open man page, dynamic PMUs can be set in the type field of the perf_event_attr structure.
The type value can be found in /sys/bus/event_source/devices/'pmu-type'/type.
Upon setting this value, perf_event_open returns -1 and throws Error opening leader error. Upon examining the errno, it is found to be an Invalid argument error.
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/perf_event.h>
#include <asm/unistd.h>
#include <linux/pmu.h>
#include <linux/hw_breakpoint.h>
long
perf_event_open(struct perf_event_attr *hw_event, pid_t pid,
int cpu, int group_fd, unsigned long flags)
{
int ret;
ret = syscall(__NR_perf_event_open, hw_event, pid, cpu,
group_fd, flags);
return ret;
}
int
main(int argc, char **argv)
{
struct perf_event_attr pe;
long long count;
int fd;
memset(&pe, 0, sizeof(struct perf_event_attr));
pe.type = 25; // // Type value 25 for PMU-Type uncore_cha_0
pe.size = sizeof(struct perf_event_attr);
pe.config = 0x0111; //Event to be monitored
pe.disabled = 1;
pe.exclude_kernel = 1;
pe.exclude_hv = 1;
fd = perf_event_open(&pe, 0, -1, -1, 0);
if (fd == -1) {
fprintf(stderr, "Error opening leader %llx\n", pe.config);
exit(EXIT_FAILURE);
}
ioctl(fd, PERF_EVENT_IOC_RESET, 0);
ioctl(fd, PERF_EVENT_IOC_ENABLE, 0);
printf("Measuring instruction count for this printf\n");
ioctl(fd, PERF_EVENT_IOC_DISABLE, 0);
read(fd, &count, sizeof(long long));
printf("Used %lld instructions\n", count);
close(fd);
}
Any help regarding this would be highly appreciated.