Feat power button #351
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Feat power button #351
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wipawel
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minipli-oss
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Driver for ACPI fixed power buttons. It allows overwriting the default handler so the button can be used for custom purposes. One such purpose might be to trigger an experiment to run. Signed-off-by: Sandro Rüegge <rueegges@ethz.ch>
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I have removed the spinlock changes. I have added another commit that adds a |
Adding a self reference to the percpu allows checking what CPU some code is currently running on. We use this in pb_set_handler to ensure it runs on the bsp.
Signed-off-by: Sandro Rüegge <rueegges@ethz.ch>
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| static void default_handler(void *); | ||
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| spinlock_t pb_handler_lock = SPINLOCK_INIT; |
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pb_handler_lock isn't used any more, can remove its definition as well.
minipli-oss
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| unsigned long usermode_private; | ||
| volatile unsigned long apic_ticks; | ||
| bool apic_timer_enabled; | ||
| struct cpu *cpu; |
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I guess, using the proper typedef'd type cpu_t would cause a cyclic header include dependency?
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Add support for ACPI fixed power buttons. This is based on #350
I wanted to add the functionality to change the power button handler because it would be useful for triggering experiments for me. This opened up a race condition between the interrupt and the function changing the handler. The interrupt may not wait for a spinlock so I added a try_lock function but I am not very convinced by this approach.