test: serial incomplete

[AndreasAakesson]

• Missing new test system (test.py)
• Missing README

This test does nothing. Any ideas how to make it do more than nothing?

[fwsGonzo]

Needs to be connected to a pseudo terminal so we can read and write to the running service

[alfreb]

Vmrunner has control over both stdin and stdut of the process so we could implement something like vm.writeline(str) in vmrunner.py and use that.

-------- Original Message -------- Subject: Re: [hioa-cs/IncludeOS] test: serial incomplete (#659) From: Alf-André Walla To: hioa-cs/IncludeOS CC:

Needs to be connected to a pseudo terminal so we can read and write to the running service

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[AndreasAakesson]

I'm currently trying to write to qemu from python (using _proc.stdin.write() on the qemu process), but it doesn't look like the service (IncludeOS) receives any interrupts. Can someone confirm that it should indeed receive interrupts? From what I can understand, -nographic makes serial port default to stdio. Is it something I'm missing?

[AndreasAakesson]

After a lot of digging I got it working.

Added IRQ_manager::cpu(0).enable_irq(4); in the service and now it's working. This should be done inside Serial when subscribing? Or should this already be done in IRQ_manager::subscribe?

[AndreasAakesson]

Nvm, I'm wrong. It looks like writing to subprocess (qemu) stdin just echos the text back to stdout.. So I still need to find out how to write to serial port from outside qemu.

[fwsGonzo]

if serial uses legacy IRQs then yes, add enable to serial constructor