linux-kernel - Re: [PATCHv3 0/6] arm64: Support FIQ controller registration

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Date:   Wed, 24 Mar 2021 20:38:05 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>, will@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, marcan@...can.st, james.morse@....com,
        maz@...nel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCHv3 0/6] arm64: Support FIQ controller registration

On Mon, 15 Mar 2021 11:56:23 +0000, Mark Rutland wrote:
> Hector's M1 support series [1] shows that some platforms have critical
> interrupts wired to FIQ, and to support these platforms we need to support
> handling FIQ exceptions. Other contemporary platforms don't use FIQ (since e.g.
> this is usually routed to EL3), and as we never expect to take an FIQ, we have
> the FIQ vector cause a panic.
> 
> Since the use of FIQ is a platform integration detail (which can differ across
> bare-metal and virtualized environments), we need be able to explicitly opt-in
> to handling FIQs while retaining the existing behaviour otherwise. This series
> adds a new set_handle_fiq() hook so that the FIQ controller can do so, and
> where no controller is registered the default handler will panic(). For
> consistency the set_handle_irq() code is made to do the same.
> 
> [...]

Applied to arm64 (for-next/fiq), thanks!

[1/6] genirq: Allow architectures to override set_handle_irq() fallback
      https://git.kernel.org/arm64/c/b0b8b689d78c
[2/6] arm64: don't use GENERIC_IRQ_MULTI_HANDLER
      https://git.kernel.org/arm64/c/338a743640e9
[3/6] arm64: irq: rework root IRQ handler registration
      https://git.kernel.org/arm64/c/8ff443cebffa
[4/6] arm64: entry: factor irq triage logic into macros
      https://git.kernel.org/arm64/c/9eb563cdabe1
[5/6] arm64: Always keep DAIF.[IF] in sync
      https://git.kernel.org/arm64/c/f0098155d337
[6/6] arm64: irq: allow FIQs to be handled
      https://git.kernel.org/arm64/c/3889ba70102e

-- 
Catalin