irqchip/gic-phytium-2500: Add support for GIC of Phytium PS20064

Phytium Ps20064 adjusts the GIC's implementation to support multi-socket
system designs. This patch adds the driver of this new implementation
while keeping the kernel binary compatible with other ARM servers in
the ecosystem.

Signed-off-by: Li Yuting <liyuting2071@phytium.com.cn>
Signed-off-by: Wang Yinfeng <wangyinfeng@phytium.com.cn>
Signed-off-by: Chen Baozi <chenbaozi@phytium.com.cn>

Author: lyt31

arch/arm64/Kconfig.platforms

@@ -246,6 +246,7 @@ config ARCH_NPCM
 
 config ARCH_PHYTIUM
 	bool "Phytium SoC Family"
+	select ARM_GIC_PHYTIUM_2500
 	help
 	  This enables support for Phytium ARMv8 SoC family, including:
 	   - Phytium Server SoC Family

drivers/irqchip/Kconfig

@@ -56,6 +56,12 @@ config ARM_GIC_V3_ITS_FSL_MC
 	depends on FSL_MC_BUS
 	default ARM_GIC_V3_ITS
 
+config ARM_GIC_PHYTIUM_2500
+	bool
+	select IRQ_DOMAIN_HIERARCHY
+	select PARTITION_PERCPU
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
+
 config ARM_NVIC
 	bool
 	select IRQ_DOMAIN_HIERARCHY

drivers/irqchip/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_ARM_GIC_V3)		+= irq-gic-v3.o irq-gic-v3-mbi.o irq-gic-common.o
 obj-$(CONFIG_ARM_GIC_V3_ITS)		+= irq-gic-v3-its.o irq-gic-v3-its-platform-msi.o irq-gic-v4.o
 obj-$(CONFIG_ARM_GIC_V3_ITS_PCI)	+= irq-gic-v3-its-pci-msi.o
 obj-$(CONFIG_ARM_GIC_V3_ITS_FSL_MC)	+= irq-gic-v3-its-fsl-mc-msi.o
+obj-$(CONFIG_ARM_GIC_PHYTIUM_2500)	+= irq-gic-phytium-2500.o irq-gic-phytium-2500-its.o
 obj-$(CONFIG_PARTITION_PERCPU)		+= irq-partition-percpu.o
 obj-$(CONFIG_HISILICON_IRQ_MBIGEN)	+= irq-mbigen.o
 obj-$(CONFIG_ARM_NVIC)			+= irq-nvic.o