On Mon, Mar 15, 2021 at 11:56:28AM +0000, Mark Rutland wrote: > From: Hector Martin <mar...@marcan.st> > > 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 <mar...@marcan.st> > Signed-off-by: Mark Rutland <mark.rutl...@arm.com> > Tested-by: Hector Martin <mar...@marcan.st> > Cc: Catalin Marinas <catalin.mari...@arm.com> > Cc: James Morse <james.mo...@arm.com> > Cc: Marc Zyngier <m...@kernel.org> > Cc: Thomas Gleixner <t...@linutronix.de> > Cc: Will Deacon <w...@kernel.org> > --- > arch/arm64/include/asm/arch_gicv3.h | 2 +- > arch/arm64/include/asm/assembler.h | 8 ++++---- > arch/arm64/include/asm/daifflags.h | 10 +++++----- > arch/arm64/include/asm/irqflags.h | 16 +++++++--------- > arch/arm64/kernel/entry.S | 12 +++++++----- > arch/arm64/kernel/process.c | 2 +- > arch/arm64/kernel/smp.c | 1 + > 7 files changed, 26 insertions(+), 25 deletions(-)
Acked-by: Will Deacon <w...@kernel.org> Will
