Linux cli command msr

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command msr and provides detailed information about the command msr, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the msr.

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NAME 🖥️ msr 🖥️

x86 CPU MSR access device

DESCRIPTION

/dev/cpu/CPUNUM/msr provides an interface to read and write the model-specific registers (MSRs) of an x86 CPU. CPUNUM is the number of the CPU to access as listed in /proc/cpuinfo.

The register access is done by opening the file and seeking to the MSR number as offset in the file, and then reading or writing in chunks of 8 bytes. An I/O transfer of more than 8 bytes means multiple reads or writes of the same register.

This file is protected so that it can be read and written only by the user root, or members of the group root.

NOTES

The msr driver is not auto-loaded. On modular kernels you might need to use the following command to load it explicitly before use:

$ modprobe msr

SEE ALSO

Intel Corporation Intel 64 and IA-32 Architectures Software Developer’s Manual Volume 3B Appendix B, for an overview of the Intel CPU MSRs.

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