[PATCH 5/5] irqchip/imsic: Use IPI_MAX instead of IMSIC_NR_IPI

[Guo Ren]

On Sun, Aug 16, 2026 at 11:28 PM Radu Rendec <radu at rendec.net> wrote:
>
> On Sun, 2026-08-16 at 07:00 +0000, Guo Ren wrote:
> > From: "GUO Ren (XuanTie)" <guoren at kernel.org>
> >
> > IMSIC was defining its own IMSIC_NR_IPI (= 8) which happened to match
> > the architecture's IPI_MAX. Now that IPI_MAX is exported from riscv
> > asm/smp.h, use the architecture constant and drop the private define.
> >
> > This keeps the number of multiplexed IPIs in sync with the rest of the
> > RISC-V IPI infrastructure.
> >
> > Signed-off-by: GUO Ren (XuanTie) <guoren at kernel.org>
> > ---
> >  drivers/irqchip/irq-riscv-imsic-early.c | 4 ++--
> >  drivers/irqchip/irq-riscv-imsic-state.h | 1 -
> >  2 files changed, 2 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/irqchip/irq-riscv-imsic-early.c b/drivers/irqchip/irq-riscv-imsic-early.c
> > index 12efd241ce88..823f5f2ecb3d 100644
> > --- a/drivers/irqchip/irq-riscv-imsic-early.c
> > +++ b/drivers/irqchip/irq-riscv-imsic-early.c
> > @@ -67,12 +67,12 @@ static int __init imsic_ipi_domain_init(void)
> >               return 0;
> >
> >       /* Create IMSIC IPI multiplexing */
> > -     virq = ipi_mux_create(IMSIC_NR_IPI, imsic_ipi_send);
> > +     virq = ipi_mux_create(IPI_MAX, imsic_ipi_send);
> >       if (virq <= 0)
> >               return virq < 0 ? virq : -ENOMEM;
> >
> >       /* Set vIRQ range */
> > -     riscv_ipi_set_virq_range(virq, IMSIC_NR_IPI);
> > +     riscv_ipi_set_virq_range(virq, IPI_MAX);
> >
> >       /* Announce that IMSIC is providing IPIs */
> >       pr_info("%pfwP: providing IPIs using interrupt %d\n", imsic->fwnode, IMSIC_IPI_ID);
> > diff --git a/drivers/irqchip/irq-riscv-imsic-state.h b/drivers/irqchip/irq-riscv-imsic-state.h
> > index c42ee180b305..878cc192ccec 100644
> > --- a/drivers/irqchip/irq-riscv-imsic-state.h
> > +++ b/drivers/irqchip/irq-riscv-imsic-state.h
> > @@ -13,7 +13,6 @@
> >  #include <linux/timer.h>
> >
> >  #define IMSIC_IPI_ID                         1
> > -#define IMSIC_NR_IPI                         8
> >
> >  struct imsic_vector {
> >       /* Fixed details of the vector */
>
> Reviewed-by: Radu Rendec <radu at rendec.net>

Thanks for the review, Radu. However, this patch depends on [1]. Would
you mind also reviewing [1]?

[1]: https://lore.kernel.org/linux-riscv/20260816070049.2097442-2-guoren@kernel.org/

-- 
Best Regards
 Guo Ren