Messages in this thread | | | Subject | Re: [PATCH 7/8 v1.5] arm64: Always keep DAIF.[IF] in sync | From | Hector Martin <> | Date | Sat, 20 Feb 2021 02:24:31 +0900 |
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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@marcan.st> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: James Morse <james.morse@arm.com> > Cc: Marc Zyngier <maz@kernel.org> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Will Deacon <will@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@marcan.st) Public Key: https://mrcn.st/pub
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