model specific registers's realted questions
Posted: Mon Jun 12, 2017 12:32 am
1)what happens when tring to modifiing the Time Stamp Counter or the Performance Counter registers using WRMSR ? , does their bits even change ? , does an exeption is raised ? how can I change their values if I wanted to ?
2)What are the 'MCA Extended State Registers' (index 0x180 - 0x197), are they just another way to access the general perpuse registers?
3)Does modifing the 'mpref' register(Index 0xe7) actually modifing the proccessor's frequency?
Sources:
http://sandpile.org/x86/msr.htm
http://wiki.osdev.org/Model_Specific_Registers
2)What are the 'MCA Extended State Registers' (index 0x180 - 0x197), are they just another way to access the general perpuse registers?
3)Does modifing the 'mpref' register(Index 0xe7) actually modifing the proccessor's frequency?
Sources:
http://sandpile.org/x86/msr.htm
http://wiki.osdev.org/Model_Specific_Registers