Commit bfa80ee9 authored by James Morse's avatar James Morse Committed by Marc Zyngier
Browse files

irqchip/gic-v3: Add __gic_get_ppi_index() to find the PPI number from hwirq 



gic_get_ppi_index() is a useful concept for ppi partitions, as the GIC
has two PPI ranges but needs mapping to a single range when used as an
index in the gic_data.ppi_descs[] array.

Add a double-underscore version which takes just the intid. This will
be used in the partition domain select and translate helpers to enable
partition support for the EPPI range.

Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Reviewed-by: default avatarValentin Schneider <valentin.schneider@arm.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210729172748.28841-2-james.morse@arm.com
parent ff117646

drivers/irqchip/irq-gic-v3.c

+9 −4
Original line number Diff line number Diff line
@@ -446,18 +446,23 @@ static void gic_irq_set_prio(struct irq_data *d, u8 prio) 
	writeb_relaxed(prio, base + offset + index);

}



static u32 gic_get_ppi_index(struct irq_data *d)

static u32 __gic_get_ppi_index(irq_hw_number_t hwirq)

{

	switch (get_intid_range(d)) {

	switch (__get_intid_range(hwirq)) {

	case PPI_RANGE:

		return d->hwirq - 16;

		return hwirq - 16;

	case EPPI_RANGE:

		return d->hwirq - EPPI_BASE_INTID + 16;

		return hwirq - EPPI_BASE_INTID + 16;

	default:

		unreachable();

	}

}



static u32 gic_get_ppi_index(struct irq_data *d)

{

	return __gic_get_ppi_index(d->hwirq);

}



static int gic_irq_nmi_setup(struct irq_data *d)

{

	struct irq_desc *desc = irq_to_desc(d->irq);