ppc: externalize ppc_get_vcpu_by_pir()

We will use it to get the CPU interrupt presenter in XIVE when the
TIMA is accessed from the indirect page.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Message-Id: <20190306085032.15744-3-clg@kaod.org>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/ppc/pnv.c

@@ -1082,22 +1082,6 @@ static void pnv_ics_resend(XICSFabric *xi)
     }
 }
 
-static PowerPCCPU *ppc_get_vcpu_by_pir(int pir)
-{
-    CPUState *cs;
-
-    CPU_FOREACH(cs) {
-        PowerPCCPU *cpu = POWERPC_CPU(cs);
-        CPUPPCState *env = &cpu->env;
-
-        if (env->spr_cb[SPR_PIR].default_value == pir) {
-            return cpu;
-        }
-    }
-
-    return NULL;
-}
-
 static ICPState *pnv_icp_get(XICSFabric *xi, int pir)
 {
     PowerPCCPU *cpu = ppc_get_vcpu_by_pir(pir);

hw/ppc/ppc.c

@@ -1492,3 +1492,19 @@ void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
         break;
     }
 }
+
+PowerPCCPU *ppc_get_vcpu_by_pir(int pir)
+{
+    CPUState *cs;
+
+    CPU_FOREACH(cs) {
+        PowerPCCPU *cpu = POWERPC_CPU(cs);
+        CPUPPCState *env = &cpu->env;
+
+        if (env->spr_cb[SPR_PIR].default_value == pir) {
+            return cpu;
+        }
+    }
+
+    return NULL;
+}

include/hw/ppc/ppc.h

@@ -4,6 +4,7 @@
 #include "target/ppc/cpu-qom.h"
 
 void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level);
+PowerPCCPU *ppc_get_vcpu_by_pir(int pir);
 
 /* PowerPC hardware exceptions management helpers */
 typedef void (*clk_setup_cb)(void *opaque, uint32_t freq);