arch/x86: Introduce NMI event for x86

[mschlumpp]

Prerequisite checklist

• Read the contribution guidelines regarding submitting new changes to the project;
• Tested your changes against relevant architectures and platforms;
• Ran the checkpatch.uk on your commit series before opening this PR;
• Updated relevant documentation.

Base target

• Architecture(s): x86_64
• Platform(s): kvm
• Application(s): N/A

Additional configuration

Description of changes

This allows libraries to handle NMI interrupts.

[unikraft-bot]

✅ Checkpatch passed

Beep boop! I ran Unikraft's checkpatch.pl support script on your pull request and it all looks good!

SHA	commit	checkpatch
3439353	arch/x86: Introduce NMI event for x86	✅

[razvand]

@mschlumpp, this is OK with me. I'll wait for @mogasergiu's and @RaduNiculae's review, and then I'll do the final approval step.

[mogasergiu]

LGTM.

Reviewed-by: Sergiu Moga sergiu@unikraft.io

[razvand]

Approved-by: Razvan Deaconescu razvand@unikraft.io

[RaduNiculae]

Looks good!