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Do not just write the MSR: instead RDMSR, set bit 0 = 0, then WRMSR #2

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xrysf03 opened this issue Jan 5, 2022 · 0 comments

xrysf03 commented Jan 5, 2022

Note that the single WRMSR is a crude approach.
Optimally, to avoid stomping over other, reserved, flags, you should:

unsigned long data = rdmsr(0x1FC);
data &= 0xFFFFFFFE; // set bit 0 to 0, preserve the rest
wrmsr(0x1FC, data);

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