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grub: wrmsr

 
 16.3.80 wrmsr
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  -- Command:: wrmsr 0xADDR 0xVALUE
      Write a 0xVALUE to a model-specific register at address 0xADDR.
 
      Please note that on SMP systems, writing to a MSR that has a scope
      per hardware thread, implies that the value that is written only
      applies to the particular cpu/core/thread that runs the command.
 
      Also, if you specify a reserved or unimplemented MSR address, it
      will cause a general protection exception (which is not currently
      being handled) and the system will reboot.
 
      Note: The command is not allowed when lockdown is enforced (⇒
      Lockdown).  This is done to prevent subverting various security
      mechanisms.
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