> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/armv8crypto.4.md).

# armv8crypto.4

`armv8crypto` — ARM CPU 上 AES 加速器驱动

## 名称

`armv8crypto`

## 概要

要将此驱动编译进内核，请将以下行放入你的内核配置文件中：

> device crypto device armv8crypto

或者，要在引导时以模块形式加载该驱动，请在 loader.conf(5) 中加入以下行：

```sh
armv8crypto_load="YES"
```

## 描述

从 ARMv8 架构开始，ARM Limited 加入了可选的密码学指令，以加速 AES、SHA-1、SHA-2 和有限域算术运算。

处理器能力在引导时以 Instruction Set Attributes 0 行中的 AES 形式报告。`armv8crypto` 驱动不会在缺乏所需 CPU 能力的系统上挂载。

`armv8crypto` 驱动注册自身以为 [crypto(4)](/man/man4/crypto.4.md) 加速 AES 操作。

## 参见

crypt(3), [crypto(4)](/man/man4/crypto.4.md), [intro(4)](/man/man4/intro.4.md), [ipsec(4)](/man/man4/ipsec.4.md), [random(4)](/man/man4/random.4.md), [crypto(7)](/man/man7/crypto.7.md), [crypto(9)](/man/man9/crypto.9.md)

## 历史

`armv8crypto` 驱动首次出现于 FreeBSD 11.0。

## 作者

`armv8crypto` 驱动由 Andrew Turner <andrew@FreeBSD.org> 编写。


---

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