[PATCH v2 0/7] arm64: Make EFI calls preemptible

[Sebastian Andrzej Siewior]

On 2025-09-05 15:30:36 [+0200], Ard Biesheuvel wrote:
> From: Ard Biesheuvel <ardb at kernel.org>
> 
…
> Note that this is only a partial solution in terms of RT guarantees,
> given that the runtime services execute at the same privilege level as
> the kernel, and can therefore disable interrupts (and therefore
> preemption) directly. But it should prevent scheduling latency spikes
> for EFI calls that simply take a long time to run to completion.

That sounds nice. There is no feature flag that could tell if a specific
EFI-call (or any) will disable interrupts, right? But if the source code
is available, you could check.

Sebastian