On 01/02/21 07:01, Like Xu wrote:
+uint64_t rdmsr_on_cpu(uint32_t reg)
+{
+ uint64_t data;
+ int fd;
+ char msr_file[64];
+
+ sprintf(msr_file, "/dev/cpu/%d/msr", 0);
+ fd = open(msr_file, O_RDONLY);
+ if (fd < 0)
+ exit(KSFT_SKIP);
+
+ if (pread(fd, &data, sizeof(data), reg) != sizeof(data))
+ exit(KSFT_SKIP);
+
+ close(fd);
+ return data;
+}
In order to allow running as non-root, it's better to use the
KVM_GET_MSRS ioctl on the /dev/kvm file descriptor.
The tests pass, but please take a look at the kvm/queue branch to see if
everything is ok.
Paolo
