Unsupported architecture: riscv64

• VSCode Version: 1.54.3
• Local OS Version: macOS 11.2.3 (20D91)
• Remote OS Version: Ubuntu 20.04.2 LTS
• Remote Extension/Connection Type: SSH

Steps to Reproduce:

1. initiate a connection to remote host riscv64 machine
2. try to decode why the remote host architecture is not supported - the traceback is not very clear as to what's missing. Is there a way to make this print out the dependency that is not present or is this failing due to a missing entry in a whitelist that is checking the output of uname -m

[11:31:22.739] Log Level: 2
[11:31:22.740] remote-ssh@0.65.1
[11:31:22.740] darwin x64
[11:31:22.741] SSH Resolver called for "ssh-remote+***.***.**.**", attempt 1
[11:31:22.741] "remote.SSH.useLocalServer": true
[11:31:22.741] "remote.SSH.sshPath": undefined
[11:31:22.741] "remote.SSH.sshConfigurationFile": undefined
[11:31:22.741] "remote.SSH.useFlock": true
[11:31:22.742] "remote.SSH.lockfilesInTmp": false
[11:31:22.742] "remote.SSH.localServerDownload": auto
[11:31:22.742] "remote.SSH.remoteServerListenOnSocket": false
[11:31:22.742] "remote.SSH.showLoginTerminal": false
[11:31:22.742] "remote.SSH.defaultExtensions": []
[11:31:22.742] SSH Resolver called for host: ***.***.**.**
[11:31:22.742] Setting up SSH remote "***.***.**.**"
[11:31:22.745] Acquiring local install lock: /var/folders/4j/snvd5rq10ms16jn9qz_lyng00000gp/T/vscode-remote-ssh-***.***.**.**-install.lock
[11:31:22.747] Looking for existing server data file at /Users/samg/Library/Application Support/Code/User/globalStorage/ms-vscode-remote.remote-ssh/vscode-ssh-host-***.***.**.**-2b9aebd5354a3629c3aba0a5f5df49f43d6689f8-0.65.1/data.json
[11:31:22.749] Using commit id "2b9aebd5354a3629c3aba0a5f5df49f43d6689f8" and quality "stable" for server
[11:31:22.752] Install and start server if needed
[11:31:22.755] Checking ssh with "ssh -V"
[11:31:22.762] > OpenSSH_8.1p1, LibreSSL 2.7.3

[11:31:22.765] askpass server listening on /var/folders/4j/snvd5rq10ms16jn9qz_lyng00000gp/T/vscode-ssh-askpass-00a9811f9da9d2d01ee2e1787c3566818915b421.sock
[11:31:22.765] Spawning local server with {"ipcHandlePath":"/var/folders/4j/snvd5rq10ms16jn9qz_lyng00000gp/T/vscode-ssh-askpass-fb0bd3b1e5dc8467d20eab31f5eec17e1ce74484.sock","sshCommand":"ssh","sshArgs":["-v","-T","-D","63444","-o","ConnectTimeout=15","***.***.**.**"],"dataFilePath":"/Users/samg/Library/Application Support/Code/User/globalStorage/ms-vscode-remote.remote-ssh/vscode-ssh-host-***.***.**.**-2b9aebd5354a3629c3aba0a5f5df49f43d6689f8-0.65.1/data.json"}
[11:31:22.765] Local server env: {"DISPLAY":"1","ELECTRON_RUN_AS_NODE":"1","SSH_ASKPASS":"/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/local-server/askpass.sh","VSCODE_SSH_ASKPASS_NODE":"/Applications/Visual Studio Code.app/Contents/Frameworks/Code Helper (Renderer).app/Contents/MacOS/Code Helper (Renderer)","VSCODE_SSH_ASKPASS_MAIN":"/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/askpass-main.js","VSCODE_SSH_ASKPASS_HANDLE":"/var/folders/4j/snvd5rq10ms16jn9qz_lyng00000gp/T/vscode-ssh-askpass-00a9811f9da9d2d01ee2e1787c3566818915b421.sock"}
[11:31:22.766] Spawned 78784
[11:31:22.861] > local-server> Spawned ssh: 78789
[11:31:22.864] stderr> OpenSSH_8.1p1, LibreSSL 2.7.3
[11:31:23.085] stderr> debug1: Server host key: ecdsa-sha2-nistp256 SHA256:fYH3j7skiWwmCgMRuSoIm7RtY+hryPXQWDSuY1b8Y54
[11:31:23.548] Got askpass request: {"request":"ubuntu@***.***.**.**'s password:"}
[11:31:23.549] Showing password prompt
[11:31:23.550] Listening for interwindow password on /var/folders/4j/snvd5rq10ms16jn9qz_lyng00000gp/T/vscode-ssh-askpass-07f31f411f8c13225a7dad9199258218cbef1c92.sock
[11:31:23.550] Writing password prompt to globalState
[11:32:06.550] Got password response
[11:32:06.551] Interactor gave response: *********
[11:32:06.552] Cleaning up other-window auth server
[11:32:06.675] stderr> Authenticated to ***.***.**.** ([***.***.**.**]:22).
[11:32:11.430] > Welcome to Ubuntu 20.04.2 LTS (GNU/Linux 5.8.0-14-generic riscv64)
> 
>  * Documentation:  https://help.ubuntu.com
>  * Management:     https://landscape.canonical.com
>  * Support:        https://ubuntu.com/advantage
> 
>   System information as of Thu Apr  1 16:32:06 UTC 2021
> 
>   System load:  0.09              Processes:             122
>   Usage of /:   61.4% of 7.00GB   Users logged in:       1
>   Memory usage: 5%                IPv4 address for eth0: ***.***.**.**
>   Swap usage:   0%
> 
>  * Introducing self-healing high availability clusters in MicroK8s.
>    Simple, hardened, Kubernetes for production, from RaspberryPi to DC.
> 
>      https://microk8s.io/high-availability
> 
> 0 updates can be installed immediately.
> 0 of these updates are security updates.
> 
> 
> *** System restart required ***
[11:32:11.470] > ready: c7a9837beb99
[11:32:11.477] > Linux 5.8.0-14-generic #16~20.04.3-Ubuntu SMP Mon Feb 1 16:33:19 UTC 2021
[11:32:11.477] Platform: linux
[11:32:11.539] > c7a9837beb99: running
[11:32:11.579] > Unsupported architecture: riscv64
> c7a9837beb99: start
> exitCode==27==
[11:32:11.580] > listeningOn====
> osReleaseId==ubuntu==
> arch==riscv64==
> tmpDir==/run/user/1000==
> platform==linux==
> unpackResult====
> didLocalDownload==0==
> downloadTime====
> installTime====
> extInstallTime====
> serverStartTime====
> c7a9837beb99: end
[11:32:11.580] Received install output: 
exitCode==27==listeningOn====
osReleaseId==ubuntu==
arch==riscv64==
tmpDir==/run/user/1000==
platform==linux==
unpackResult====
didLocalDownload==0==
downloadTime====
installTime====
extInstallTime====
serverStartTime====

[11:32:11.582] Unsupported architecture
[11:32:11.582] Terminating local server
[11:32:11.587] Resolver error: Error: The remote host's architecture is not supported
	at Function.ServerInstallError (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:64262)
	at c (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:58179)
	at Object.t.handleInstallOutput (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:63055)
	at Object.t.tryInstallWithLocalServer (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:388682)
	at processTicksAndRejections (internal/process/task_queues.js:97:5)
	at async /Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:293749
	at async Object.t.withShowDetailsEvent (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:407055)
	at async /Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:387177
	at async N (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:383945)
	at async Object.t.resolveWithLocalServer (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:386804)
	at async Object.t.resolve (/Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:1:297790)
	at async /Users/samg/.vscode/extensions/ms-vscode-remote.remote-ssh-0.65.1/out/extension.js:127:110485
[11:32:11.589] Local server exit: 15
[11:32:11.591] ------

Start with the remote SSH install output, especially the reported riscv64 architecture and the extension.js ServerInstallError path. Determine whether the failure is caused by an unavailable dependency or unsupported architecture handling; done means the issue has a clear diagnosis and user-facing result.