Re: [PATCH v16 0/9] RISC-V IPI Improvements

[Palmer Dabbelt]

On Sun, 05 Feb 2023 03:04:14 PST (-0800), Marc Zyngier wrote:
> On Tue, 03 Jan 2023 14:12:12 +0000,
> Anup Patel <apatel@xxxxxxxxxxxxxxxx> wrote:
> > This series aims to improve IPI support in Linux RISC-V in following ways:
> >  1) Treat IPIs as normal per-CPU interrupts instead of having custom RISC-V
> >     specific hooks. This also makes Linux RISC-V IPI support aligned with
> >     other architectures.
> >  2) Remote TLB flushes and icache flushes should prefer local IPIs instead
> >     of SBI calls whenever we have specialized hardware (such as RISC-V AIA
> >     IMSIC and RISC-V SWI) which allows S-mode software to directly inject
> >     IPIs without any assistance from M-mode runtime firmware.
>
> [...]
>
> I'm queuing patches 3 and 9 via the irqchip tree as they are
> standalone.
>
> For the rest, I need an Ack from the riscv maintainers as they change
> a large amount of arch-specific code, and the couple of irqchip
> patches depend on these changes.
>
> Palmer, Paul?

I haven't gotten time to give this a proper review, but I think we've 
got enough of a mess with our interrupt handling that it doesn't really 
matter so

Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>

if you want to take it for this cycle that's fine with me, but I'm also 
fine holding off so it can have a while to bake in linux-next -- there's 
no real rush for any of this, as there's no hardware yet.

> Thanks,
>
> 	M.