arch/arm64: add support to config SPI interrupt affinity routing to CPU0 by default

Signed-off-by: chao an <anchao@lixiang.com>

Author: anchao

arch/arm64/Kconfig

@@ -361,6 +361,13 @@ config ARM64_GICV3_SPI_EDGE
 	---help---
 		Configure all SPIs(Shared Peripheral Interrupts) as edge-triggered by default.
 
+config ARM64_GICV3_SPI_ROUTING_CPU0
+	bool "Configure SPI interrupt affinity routing to CPU0 by default"
+	default y if SMP
+	default n
+	---help---
+		Configure SPI interrupt affinity routing to CPU0 by default.
+
 endif
 
 config ARM64_SEMIHOSTING_HOSTFS

arch/arm64/src/common/arm64_arch.h

@@ -506,7 +506,7 @@ void arm64_cpu_enable(void);
 #ifdef CONFIG_SMP
 uint64_t arm64_get_mpid(int cpu);
 #else
-#  define arm64_get_mpid(cpu) GET_MPIDR()
+#  define arm64_get_mpid(cpu) (GET_MPIDR() & MPIDR_ID_MASK)
 #endif /* CONFIG_SMP */
 
 /****************************************************************************

arch/arm64/src/common/arm64_gicv3.c

@@ -254,10 +254,12 @@ void arm64_gic_irq_enable(unsigned int intid)
    * SPI's affinity, now set it to be the PE on which it is enabled.
    */
 
+#ifndef CONFIG_ARM64_GICV3_SPI_ROUTING_CPU0
   if (GIC_IS_SPI(intid))
     {
       arm64_gic_write_irouter((GET_MPIDR() & MPIDR_ID_MASK), intid);
     }
+#endif
 
   putreg32(mask, ISENABLER(GET_DIST_BASE(intid), idx));
 }
@@ -618,6 +620,17 @@ static void gicv3_dist_init(void)
 #endif
     }
 
+  /* Configure SPI interrupt affinity routing to CPU0 */
+
+#ifdef CONFIG_ARM64_GICV3_SPI_ROUTING_CPU0
+  uint64_t mpid = arm64_get_mpid(0);
+
+  for (intid = GIC_SPI_INT_BASE; intid < num_ints; intid++)
+    {
+      putreg64(mpid, IROUTER(base, intid));
+    }
+#endif
+
   /* TODO: Some arrch64 Cortex-A core maybe without security state
    * it has different GIC configure with standard arrch64 A or R core
    */