irqchip: mips-cpu: Introduce IPI IRQ domain support

Introduce support for registering an IPI IRQ domain suitable for use by
systems using the MIPS MT (multithreading) ASE within a single core.
This will allow for such systems to be supported generically, without
the current kludge of IPI code split between the MIPS arch & the malta
board support code.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15836/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 8162121bb1bc..f03ef434503b 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -128,7 +128,9 @@ config IMGPDC_IRQ
 config IRQ_MIPS_CPU
         bool
         select GENERIC_IRQ_CHIP
+        select GENERIC_IRQ_IPI if SYS_SUPPORTS_MULTITHREADING
         select IRQ_DOMAIN
+        select IRQ_DOMAIN_HIERARCHY if GENERIC_IRQ_IPI
 
 config CLPS711X_IRQCHIP
         bool