[PATCH v5 2/5] irqchip/gic-v3: Enable support for SGIs to act as NMIs
Marc Zyngier
maz at kernel.org
Mon Oct 19 08:07:53 EDT 2020
On 2020-10-14 12:12, Sumit Garg wrote:
> Add support to handle SGIs as regular NMIs. As SGIs or IPIs defaults to
> a
There is nothing "regular" about NMIs. Drop "or IPIs".
s/defaults/default/
> special flow handler: handle_percpu_devid_fasteoi_ipi(), so skip NMI
> handler update in case of SGIs.
>
> Also, enable NMI support prior to gic_smp_init() as allocation of SGIs
> as IRQs/NMIs happen as part of this routine.
>
> Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
> ---
> drivers/irqchip/irq-gic-v3.c | 13 +++++++++++--
> 1 file changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/irqchip/irq-gic-v3.c
> b/drivers/irqchip/irq-gic-v3.c
> index 16fecc0..5efc865 100644
> --- a/drivers/irqchip/irq-gic-v3.c
> +++ b/drivers/irqchip/irq-gic-v3.c
> @@ -477,6 +477,11 @@ static int gic_irq_nmi_setup(struct irq_data *d)
> if (WARN_ON(gic_irq(d) >= 8192))
> return -EINVAL;
>
> + if (get_intid_range(d) == SGI_RANGE) {
> + gic_irq_set_prio(d, GICD_INT_NMI_PRI);
> + return 0;
> + }
> +
Please follow the existing control flow, or rework it to be organised by
range.
> /* desc lock should already be held */
> if (gic_irq_in_rdist(d)) {
> u32 idx = gic_get_ppi_index(d);
> @@ -514,6 +519,11 @@ static void gic_irq_nmi_teardown(struct irq_data
> *d)
> if (WARN_ON(gic_irq(d) >= 8192))
> return;
>
> + if (get_intid_range(d) == SGI_RANGE) {
> + gic_irq_set_prio(d, GICD_INT_DEF_PRI);
> + return;
> + }
Same here.
> +
> /* desc lock should already be held */
> if (gic_irq_in_rdist(d)) {
> u32 idx = gic_get_ppi_index(d);
> @@ -1708,6 +1718,7 @@ static int __init gic_init_bases(void __iomem
> *dist_base,
>
> gic_dist_init();
> gic_cpu_init();
> + gic_enable_nmi_support();
> gic_smp_init();
> gic_cpu_pm_init();
>
> @@ -1719,8 +1730,6 @@ static int __init gic_init_bases(void __iomem
> *dist_base,
> gicv2m_init(handle, gic_data.domain);
> }
>
> - gic_enable_nmi_support();
> -
> return 0;
>
> out_free:
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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