uefi separation of the layer from the driver?

Question

uefi separation of the layer from the driver?

xSanx opened this issue 4 years ago · 3 comments

I apologize for the stupid question, why do I need a driver in Windows, what does it virtualize?

Answer 1 · 2020-04-29T07:52:00.000Z

It needs a driver because that is the only real way to enter CPL0 (kernel mode) which is required for VMX instructions. This virtualizes all your processors.

Answer 2 · 2020-04-29T12:08:18.000Z

that is, they work together? I assumed that the hypervisor works as a layer between windows and uefi

Answer 3 · 2020-05-06T17:39:15.000Z

You misunderstand what a hypervisor is and the difference between type 1 and 2. A type 2 hypervisor needs a driver to run, as it is self hosted. Although the typical hypervisor itself doesn’t really depend on the OS, it needs a driver to execute in kernel mode (CPL0).