8000 ARM timer IRQs dropping in certain cases · Issue #138 · au-ts/libvmm · GitHub
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ARM timer IRQs dropping in certain cases #138
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@Ivan-Velickovic

Description

@Ivan-Velickovic

In the past when the system has been under high load and the guest/VMM hasn't had a chance to run in a while errors like the following can show up:

VMM|ERROR: vIRQ 0x1b is not enabled 
VMM|ERROR: VPPI IRQ 27 dropped on vCPU 0 

I can't tell if this is a bug with the VMM or with the kernel since a similar case where the guest hasn't had a chance to run in a while is setting a budget less than the period.

However, this leads to a kernel assertion right now:
seL4/seL4#1104.

More investigation required, will post updates to this issue.

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