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The 'misc_ctl' field in VMCB02 is taken as-is from VMCB01. However, the only bit that needs to copied is SVM_MISC_ENABLE_NP, as all other known bits in misc_ctl are related to SEV guests, and KVM doesn't support nested virtualization for SEV guests. Only copy SVM_MISC_ENABLE_NP to harden against future bugs if/when other bits are set for L1 but should not be set for L2. Opportunistically add a comment explaining why SVM_MISC_ENABLE_NP is taken from VMCB01 and not VMCB02. Suggested-by: Jim Mattson <jmattson@google.com> Signed-off-by: Yosry Ahmed <yosry@kernel.org> Link: https://patch.msgid.link/20260303003421.2185681-26-yosry@kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com>