Summary
How Intel® Xeon® Scalable Processor platforms support 1 TB EPCs
Description
- The maximum EPC size for Intel® Software Guard Extensions (Intel® SGX) processors before 3rd Gen Intel® Xeon® Scalable Processor platforms was 256 MB.
- Unable to determine which technology enables 1 TB of EPC on Intel® Xeon® Scalable Processor platforms.
Resolution
Enclave Page Cache (EPC) is a technology available on Intel® Xeon® Scalable Processors. Depending on the generation and processor SKU, the EPC will be set.
- 3rd Generation Intel® Xeon® Scalable Processors support 512 GB of EPC size, which adds up to 1 TB on a two-socket platform.
- 4th Gen Intel® Xeon® Scalable Processors, some SKUs support 512GB of EPC size, while other SKUs only supports 128GB of EPC size.
- 5th Gen Intel® Xeon® Scalable Processors,we have 3 options, SKUs supporting 512GB of EPC size, SKUs supporting 128GB of EPC size and SKUs supporting 64GB of EPC size.
- Intel® Xeon® 6 supports 512 GB of EPC size, which adds up to 1 TB on a two-socket platform.
- Intel® SGX switched from using the Memory Encryption Engine (MEE), which uses on-die space for a Merkle Tree that doesn’t expand easily, to using Advanced Encryption Standard - XEX Tweakable Block Cipher with Ciphertext Stealing (AES-XTS), enabling a larger EPC.
For a detailed specification, visit Intel® Product Specifications - Intel® Xeon® Processors.