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| // SPDX-License-Identifier: GPL-2.0
| #include <math.h>
| #include <unistd.h>
| #include <stdio.h>
| #include <stdlib.h>
| #include <sys/types.h>
| #include <sys/stat.h>
| #include <fcntl.h>
| #include <sys/timeb.h>
| #include <sched.h>
| #include <errno.h>
|
|
| int main(int argc, char **argv) {
| int cpu, fd;
| long long msr;
| char msr_file_name[64];
|
| if (argc != 2)
| return 1;
|
| errno = 0;
| cpu = strtol(argv[1], (char **) NULL, 10);
|
| if (errno)
| return 1;
|
| sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
| fd = open(msr_file_name, O_RDONLY);
|
| if (fd == -1) {
| perror("Failed to open");
| return 1;
| }
|
| pread(fd, &msr, sizeof(msr), 0x199);
|
| printf("msr 0x199: 0x%llx\n", msr);
| return 0;
| }
|
|
