Chris Lalancette wrote:
I'm pretty sure you have to test for it first; pre-64 bit x86 hardware doesn't have the EFER register, so you'll fault on access. On the other hand pre-64 bit x86 hardware doesn't usually (ever?) have VT extensions either.
All amd hardware that supports svm has an efer. Some Intel hardware doesn't, but we don't care in that case.
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