• Problem Statement
• Issues with SMM
• Platforms Have Little Choice
• Sample GetVariable () Impact
• A Phased Approach
• Priority: Reduce SMM Usage for Getting UEFI Variables
• Summary of Changes
• Major Changes
• Design Details
• UEFI Variable Cache Background
• Previous UEFI Variable Cache
• UEFI Variable Cache with Runtime Cache
• High-Level GetVariable () Flow with the Runtime Cache
• High-Level SetVariable () Flow with the Runtime Cache
• Runtime & SMM Cache Coherency
• Runtime DXE Read Flow
• FlushRuntimeCachePendingUpdate SMI Flow
• SMM Write Flow
• Security Concerns