Anup Patel <apatel@xxxxxxxxxxxxxxxx> writes:
> The Linux platform MSI support allows per-device MSI domains so let
> us add a platform irqchip driver for RISC-V IMSIC which provides a
> base IRQ domain with MSI parent support for platform device domains.
>
> This driver assumes that the IMSIC state is already initialized by
> the IMSIC early driver.
>
> Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx>
[...]
> diff --git a/drivers/irqchip/irq-riscv-imsic-platform.c b/drivers/irqchip/irq-riscv-imsic-platform.c
> new file mode 100644
> index 000000000000..65791a6b0727
> --- /dev/null
> +++ b/drivers/irqchip/irq-riscv-imsic-platform.c
> @@ -0,0 +1,371 @@
[...]
> +static int imsic_irq_retrigger(struct irq_data *d)
> +{
> + struct imsic_vector *vec = irq_data_get_irq_chip_data(d);
> + struct imsic_local_config *local;
> +
> + if (WARN_ON(vec == NULL))
> + return -ENOENT;
> +
> + local = per_cpu_ptr(imsic->global.local, vec->cpu);
> + writel(vec->local_id, local->msi_va);
Change to writel_relaxed().
