[SMP] New IPI call to unmask remote IRQ

Added a new IPI on ARM to unmask a remote private interrupt.

include/arch/arm/arch/smp/ipi.h

@@ -22,6 +22,7 @@ typedef enum {
     IpiRemoteCall_InvalidateTranslationASID,
     IpiRemoteCall_InvalidateTranslationAll,
     IpiRemoteCall_switchFpuOwner,
+    IpiRemoteCall_MaskPrivateInterrupt,
     /* Add relevant calls here upon required */
     IpiNumArchRemoteCall
 } IpiRemoteCall_t;

include/arch/arm/arch/smp/ipi_inline.h

@@ -43,5 +43,10 @@ static inline void doRemoteInvalidateTranslationAll(word_t mask)
 {
     doRemoteMaskOp0Arg(IpiRemoteCall_InvalidateTranslationAll, mask);
 }
+
+static inline void doRemoteMaskPrivateInterrupt(word_t cpu, word_t disable, word_t irq)
+{
+    doRemoteOp2Arg(IpiRemoteCall_MaskPrivateInterrupt, disable, irq, cpu);
+}
 #endif /* ENABLE_SMP_SUPPORT */
 #endif /* __ARCH_SMP_IPI_INLINE_H */

src/arch/arm/smp/ipi.c

@@ -61,6 +61,10 @@ static void handleRemoteCall(IpiModeRemoteCall_t call, word_t arg0,
             invalidateTranslationAllLocal();
             break;
 
+        case IpiRemoteCall_MaskPrivateInterrupt:
+            maskInterrupt(arg0, arg1);
+            break;
+
         default:
             fail("Invalid remote call");
             break;