在AWS EC2 F1上构建和安装XRT报错

Question

【以下的问题经过翻译处理】 我正在升级F1实例上的XRT，但是在升级后我找不到FPGA设备了。虽然我可以在lspci中找到设备，但我不能再加载AFI（hello world afi）。

```
$ lspci
...
00:1b.0 Memory controller: Amazon.com, Inc. Device f000
00:1c.0 Memory controller: Amazon.com, Inc. Device 1041
00:1d.0 Memory controller: Amazon.com, Inc. Device f000
00:1e.0 Memory controller: Amazon.com, Inc. Device 1041
```

```
$ xbutil scan
INFO: Found total 0 card(s), 0 are usable
```

```
System Configuration  
OS name:	Linux  
Release:	5.4.0-1025-aws  
Version:	#25~18.04.1-Ubuntu SMP Fri Sep 11 12:03:04 UTC 2020  
Machine:	x86_64  
Model:		HVM domU  
CPU cores:	16  
Memory:		245642 MB  
Glibc:		2.27  
Distribution:	Ubuntu 18.04.4 LTS  
Now:		Tue Sep 29 04:46:36 2020 GMT  
```

```
XRT Information
Version: 2.8.0
Git Hash: 5d0ccb4f90d39202644f07de9648743d986a7e68
Git Branch: master
Build Date: 2020-09-29 04:26:24
XOCL: unknown
XCLMGMT: unknown
```
-------------------------------------------------------------------------------------------------------------------------------------------------------------------

问题看起来像是没有安装XOCL。
所以我重新安装了所有内容，检查了每个步骤，发现当我这样做：
sudo apt install --reinstall ./xrt\_202020.2.8.0\_18.04-amd64-xrt.deb

错误如下：
Unregistering old XRT Linux kernel module sources 2.8.0 from dkms on Ubuntu/Debian

------------------
Deleting module version: 2.8.0
completely from the DKMS tree.
Done.
Cleanup is skipped for package upgrade/downgrade/re-install on Ubuntu/Debian
Unpacking xrt (2.8.0) over (2.8.0) ...
Setting up xrt (2.8.0) ...
Unloading old XRT Linux kernel modules
rmmod: ERROR: Module xocl is not currently loaded
rmmod: ERROR: Module xclmgmt is not currently loaded
Invoking DKMS common.postinst for xrt
Loading new xrt-2.8.0 DKMS files...
Building for 5.4.0-1025-aws
Building initial module for 5.4.0-1025-aws
ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/xrt.0.crash'
Error! Build of xclmgmt.ko failed for: 5.4.0-1025-aws (x86_64)
Consult the make.log in the build directory
/var/lib/dkms/xrt/2.8.0/build/ for more information.
Finished DKMS common.postinst
Loading new XRT Linux kernel modules
modprobe: FATAL: Module xclmgmt not found in directory /lib/modules/5.4.0-1025-aws
modprobe: FATAL: Module xocl not found in directory /lib/modules/5.4.0-1025-aws

DKMS failed to install XRT drivers.
Please check if kernel development headers are installed for OS variant used.
Check build logs in /var/lib/dkms/xrt/2.8.0

------------------------
aws-fpga版本：1.4.15
xrt版本：xrt 2.6.0 和 2.8.0

Answer

【以下的回答经过翻译处理】 看起来Ubuntu AWS优化的内核和模块额外文件夹中没有需要此XRT的fpga-mgr模块。

你可以尝试使用不同的内核吗？建议升级内核并重新构建和安装XRT。

```
sudo apt update
sudo apt install linux-virtual
sudo apt install linux-modules-extra-$(uname -r)
sudo apt purge linux*aws
sudo reboot
```
这应该能坚决您的问题。

在AWS EC2 F1上构建和安装XRT报错

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