[PATCH 7/8 v1.5] arm64: Always keep DAIF.[IF] in sync

[Hector Martin]

On 20/02/2021 02.21, Hector Martin wrote:
> Apple SoCs (A11 and newer) have some interrupt sources hardwired to the
> FIQ line. We implement support for this by simply treating IRQs and FIQs
> the same way in the interrupt vectors.
> 
> To support these systems, the FIQ mask bit needs to be kept in sync with
> the IRQ mask bit, so both kinds of exceptions are masked together. No
> other platforms should be delivering FIQ exceptions right now, and we
> already unmask FIQ in normal process context, so this should not have an
> effect on other systems - if spurious FIQs were arriving, they would
> already panic the kernel.
> 
> Signed-off-by: Hector Martin <marcan at marcan.st>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: James Morse <james.morse at arm.com>
> Cc: Marc Zyngier <maz at kernel.org>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: Will Deacon <will at kernel.org>
> 
Argh, sorry, I botched the trhreading. Got caught by git send-email 
prompting me on the dry-run, but not after I added a --to... Resending.

-- 
Hector Martin (marcan at marcan.st)
Public Key: https://mrcn.st/pub