Dong, Eddie wrote:
Following code deactivate fpu when CR0.PE is on, any explaination? Rest of code active/deactive fpu based on cr0.TS bit.
The idea is, if the guest is doing a context switch, then it will likely set its own lazy fpu code, so we anticipate it and deactivate the cpu.
When cr0.pe is cleared, lazy fpu usually doesn't work so we leave it enabled.
However the mechanism of deactivating the fpu on cr3 write doesn't work with npt or ept, I'd like to replace it with something better.
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