[PATCH v4 2/2] irqchip: gic-v3: only select HAVE_ARM_SMCCC_DISCOVERY on arm64

[Julian Braha]

ARM_PSCI_FW is always enabled for arm64, and the GICv3 driver only
uses HAVE_ARM_SMCCC_DISCOVERY to identify the NVIDIA T241, which is
arm64 anyway.

For ARM_GIC_V3, let's only select HAVE_ARM_SMCCC_DISCOVERY on arm64.

Fixes: 35727af2b15d ("irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4")
Suggested-by: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Julian Braha <julianbraha@xxxxxxxxx>
Reviewed-by: Marc Zyngier <maz@xxxxxxxxxx>
---
Changes since v3:
- reorder patches to prevent build failure for 32bit ARM without PSCI

Link to v3:
https://lore.kernel.org/all/20261014123539.2259230-1-julianbraha@xxxxxxxxx/

Changes since v2:
- split out changes into two patches

Link to v2:
https://lore.kernel.org/all/20260823180832.1246363-1-julianbraha@xxxxxxxxx/

Changes since v1:
- remove select and dependency on ARM_PSCI_FW,
- make the HAVE_ARM_SMCCC_DISCOVERY 'select' conditional on arm64

Link to v1: https://lore.kernel.org/all/20260801212235.2692694-1-julianbraha@xxxxxxxxx/
---
 drivers/irqchip/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 136bab41f801..ca915fca0ef5 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -37,7 +37,7 @@ config ARM_GIC_V3
 	bool
 	select IRQ_DOMAIN_HIERARCHY
 	select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP
-	select HAVE_ARM_SMCCC_DISCOVERY
+	select HAVE_ARM_SMCCC_DISCOVERY if ARM64
 	select IRQ_MSI_IOMMU
 
 config ARM_GIC_ITS_PARENT
-- 
2.55.0