Model-specific registers

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Model-specific registers are processor registers in the x86 system architecture that can be used for debugging, monitoring, and toggling of features.


To enable access to MSRs in the kernel:

KERNEL menuconfig
Processor type and features  --->
    <*> /dev/cpu/*/msr - Model-specific register support

Note that enabling either of the kernel lockdown modes requires disabling access to MSRs.

External resources