Virtualization Software Development

how to know what the VMM has registered for its control fields

I'm trying to find out what does the Microsoft Hypervisor register for as its control fields.

What registers do I need to be looking at it to find this? The documentaiton is unclear as to where the registers are that control the fields. It keeps saying bitmaps .. but to what.

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Finding out if "Unrestricted Guest" supported at runtime

Hi there,

is there an option to find out at runtime (e.g. with means of CPUID or something else) if the "Unrestricted Guest" feature is supported on the CPU? In the developer manual I can only find which flags control the UG feature (i.e. "25.8. Unrestricted Guests" ff), but I don't see anywhere how to determine if the feature is actually supported. Historically, at which processor family was "Unrestricted Guest" introduced? Is there a easy way to tell which processors contian the feature from the timeline?

Best regards,
Joe

Is it possible to use Intel NPT to do cross ISA memory translation?

O.K., I know Intel virtualization techniques are used to help better performance for same ISA, i.e., x86, virtualization. But I am curious if we can use NPT to help us to do cross ISA memory translation. For example, I can run a ARM guest on x86 host by using QEMU, but the memory translation inside QEMU is pure software. Is it possible to leverage underlying hardware to speedup the translation?

Any comments are welcome. Thanks!

Iscriversi a Virtualization Software Development