Introduction

The Kunpeng Accelerator Engine (KAE) is a hardware-based acceleration solution built on Kunpeng processors. It supports encryption, decryption, and decompression. This document describes its functions, installation and test procedures, and use cases.

The KAE encryption and decryption module accelerates Secure Sockets Layer (SSL) and Transport Layer Security (TLS) applications. The KAE decompression modules accelerate data compression and decompression, greatly reducing processor consumption and improving efficiency. In addition, KAE abstracts the internal processing details from the application layer. You can quickly migrate services by using the standard OpenSSL, Tongsuo, BoringSSL, zstd, LZ4, and zlib interfaces.

Software Architecture

Figure 1 shows the KAE software architecture.

Figure 1 Software architecture

Table 1 describes the functions of each module in the software architecture.

**Table 1** Functions of each module
Module Name	Function
Accelerator libraries	Application development libraries that integrate encryption, decryption, or decompression algorithms. A library can serve as a bridge between upper-layer applications and hardware accelerators.
UADK	User Space Accelerator Development Kit. It provides a unified API for hardware-based acceleration of cryptographic and compression algorithms.
UACCE	User Space Accelerator. It is a kernel driver framework module that provides a unified driver API for user space.
KAE	Kunpeng Accelerator Engine. It is an acceleration solution based on Kunpeng 920 series processors.

Version Description

KAE is an accelerator developed based on Kunpeng processors. It uses two driver frameworks: Warpdriver (WD) and UADK. It has two code branches for different kernel versions: KAE 1.0 and KAE 2.0. Table 2 describes the differences.

**Table 2** Differences between two KAE code branches
Code Branch	KAE 1.0	KAE 2.0
Supported Kernel Version	4.19	5.10
Corresponding KAE Version	1.x.x	2.x.x
Modules Contained in the Source Code	Kernel driver, user-space driver, OpenSSL-based KAE, and zlib library	KAE kernel driver, UADK framework, KAEOpensslEngine, KAEZstd, KAELz4, and KAEZlib

Parent topic: Overview