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UEFI Secure Boot requires SMM (because it secures access to the key vault). Non-x86 architectures use something else, for example they could use EL3 on ARM. Eit
by bonzini 5y ago
UEFI Secure Boot requires SMM (because it secures access to the key vault). Non-x86 architectures use something else, for example they could use EL3 on ARM. Either way it's a "super-supervisor mode" of sorts.
- p_l 5y agoWell, it does not have to be SMM that does it - it's just that SMM is what we have already available so unless you have certain rare hw it's what vendors will use :(