1. A computer-implemented method, comprising: receiving, at a computer system, a system management interrupt; based in part on receiving the system management interrupt, temporarily suspending execution of a subset of executable instructions associated with operation of a trusted computing base; receiving one or more updates to at least a portion of the trusted computing base; authenticating an integrity of at least one update of the one or more updates by at least performing a cryptographic operation on the at least one update with a cryptographic key; updating the portion of the trusted computing base using the authenticated at least one update; and resuming execution of the subset of the executable instructions.