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Skip APIC detection on Uhyve #1352

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jounathaen opened this issue Aug 7, 2024 · 2 comments
Open

Skip APIC detection on Uhyve #1352

jounathaen opened this issue Aug 7, 2024 · 2 comments
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good first issue Good for newcomers

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@jounathaen
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I'm not 100% sure about this one, but AFAIK, Uhyve does not provide an APIC or IO-APIC. But if the acpi feature is active, the kernel unsuccessfully probes the memory to find one. I think, we can skip the search for an APIC if we are on Uhyve and save a few CPU cycles.
@jounathaen jounathaen added the good first issue Good for newcomers label Aug 7, 2024
@stlankes
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stlankes commented Aug 7, 2024

I would assume that we need at least a local APIC to program the timer interrupt.

@jounathaen
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Yes. Something like this is happening. But the probing can probably be skipped.

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@stlankes @jounathaen