Re: [PATCH v6] arm64: sdei: abort running SDEI handlers during crash

[Mihai Carabas]

> Interrupts are blocked in SDEI context, per the SDEI spec: "The client
> interrupts cannot preempt the event handler." If we crashed in the SDEI
> handler-running context (as with ACPI's AGDI) then we need to clean 
up the
> SDEI state before proceeding to the crash kernel so that the crash kernel
> can have working interrupts.
>
> Track the active SDEI handler per-cpu so that we can COMPLETE_AND_RESUME
> the handler, discarding the interrupted context.

> Fixes: f5df26961853 ("arm64: kernel: Add arch-specific SDEI entry 
code and CPU masking")
> Signed-off-by: D Scott Phillips <scott@xxxxxxxxxxxxxxxxxxxxxx>

We have tested successfully this patch on Altra and AmpereOne.

Tested-by: Mihai Carabas <mihai.carabas@xxxxxxxxxx>