spapr, xics, xive: Move cpu_intc_create from SpaprIrq to SpaprInterruptController

This method essentially represents code which belongs to the interrupt
controller, but needs to be called on all possible intcs, rather than
just the currently active one.  The "dual" version therefore calls
into the xics and xive versions confusingly.

Handle this more directly, by making it instead a method on the intc
backend, and always calling it on every backend that exists.

While we're there, streamline the error reporting a bit.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>

hw/intc/spapr_xive.c

@@ -495,10 +495,33 @@ static Property spapr_xive_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static int spapr_xive_cpu_intc_create(SpaprInterruptController *intc,
+                                      PowerPCCPU *cpu, Error **errp)
+{
+    SpaprXive *xive = SPAPR_XIVE(intc);
+    Object *obj;
+    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+
+    obj = xive_tctx_create(OBJECT(cpu), XIVE_ROUTER(xive), errp);
+    if (!obj) {
+        return -1;
+    }
+
+    spapr_cpu->tctx = XIVE_TCTX(obj);
+
+    /*
+     * (TCG) Early setting the OS CAM line for hotplugged CPUs as they
+     * don't beneficiate from the reset of the XIVE IRQ backend
+     */
+    spapr_xive_set_tctx_os_cam(spapr_cpu->tctx);
+    return 0;
+}
+
 static void spapr_xive_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass);
+    SpaprInterruptControllerClass *sicc = SPAPR_INTC_CLASS(klass);
 
     dc->desc    = "sPAPR XIVE Interrupt Controller";
     dc->props   = spapr_xive_properties;
@@ -511,6 +534,8 @@ static void spapr_xive_class_init(ObjectClass *klass, void *data)
     xrc->get_nvt = spapr_xive_get_nvt;
     xrc->write_nvt = spapr_xive_write_nvt;
     xrc->get_tctx = spapr_xive_get_tctx;
+
+    sicc->cpu_intc_create = spapr_xive_cpu_intc_create;
 }
 
 static const TypeInfo spapr_xive_info = {

hw/intc/xics_spapr.c

@@ -330,13 +330,31 @@ void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
     _FDT(fdt_setprop_cell(fdt, node, "phandle", phandle));
 }
 
+static int xics_spapr_cpu_intc_create(SpaprInterruptController *intc,
+                                       PowerPCCPU *cpu, Error **errp)
+{
+    ICSState *ics = ICS_SPAPR(intc);
+    Object *obj;
+    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+
+    obj = icp_create(OBJECT(cpu), TYPE_ICP, ics->xics, errp);
+    if (!obj) {
+        return -1;
+    }
+
+    spapr_cpu->icp = ICP(obj);
+    return 0;
+}
+
 static void ics_spapr_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICSStateClass *isc = ICS_CLASS(klass);
+    SpaprInterruptControllerClass *sicc = SPAPR_INTC_CLASS(klass);
 
     device_class_set_parent_realize(dc, ics_spapr_realize,
                                     &isc->parent_realize);
+    sicc->cpu_intc_create = xics_spapr_cpu_intc_create;
 }
 
 static const TypeInfo ics_spapr_info = {

hw/ppc/spapr_cpu_core.c

@@ -237,8 +237,7 @@ static void spapr_realize_vcpu(PowerPCCPU *cpu, SpaprMachineState *spapr,
     qemu_register_reset(spapr_cpu_reset, cpu);
     spapr_cpu_reset(cpu);
 
-    spapr->irq->cpu_intc_create(spapr, cpu, &local_err);
-    if (local_err) {
+    if (spapr_irq_cpu_intc_create(spapr, cpu, &local_err) < 0) {
         goto error_unregister;
     }
 

hw/ppc/spapr_irq.c

@@ -138,23 +138,6 @@ static void spapr_irq_print_info_xics(SpaprMachineState *spapr, Monitor *mon)
     ics_pic_print_info(spapr->ics, mon);
 }
 
-static void spapr_irq_cpu_intc_create_xics(SpaprMachineState *spapr,
-                                           PowerPCCPU *cpu, Error **errp)
-{
-    Error *local_err = NULL;
-    Object *obj;
-    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
-
-    obj = icp_create(OBJECT(cpu), TYPE_ICP, XICS_FABRIC(spapr),
-                     &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    spapr_cpu->icp = ICP(obj);
-}
-
 static int spapr_irq_post_load_xics(SpaprMachineState *spapr, int version_id)
 {
     if (!kvm_irqchip_in_kernel()) {
@@ -203,7 +186,6 @@ SpaprIrq spapr_irq_xics = {
     .free        = spapr_irq_free_xics,
     .print_info  = spapr_irq_print_info_xics,
     .dt_populate = spapr_dt_xics,
-    .cpu_intc_create = spapr_irq_cpu_intc_create_xics,
     .post_load   = spapr_irq_post_load_xics,
     .reset       = spapr_irq_reset_xics,
     .set_irq     = spapr_irq_set_irq_xics,
@@ -239,28 +221,6 @@ static void spapr_irq_print_info_xive(SpaprMachineState *spapr,
     spapr_xive_pic_print_info(spapr->xive, mon);
 }
 
-static void spapr_irq_cpu_intc_create_xive(SpaprMachineState *spapr,
-                                           PowerPCCPU *cpu, Error **errp)
-{
-    Error *local_err = NULL;
-    Object *obj;
-    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
-
-    obj = xive_tctx_create(OBJECT(cpu), XIVE_ROUTER(spapr->xive), &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    spapr_cpu->tctx = XIVE_TCTX(obj);
-
-    /*
-     * (TCG) Early setting the OS CAM line for hotplugged CPUs as they
-     * don't beneficiate from the reset of the XIVE IRQ backend
-     */
-    spapr_xive_set_tctx_os_cam(spapr_cpu->tctx);
-}
-
 static int spapr_irq_post_load_xive(SpaprMachineState *spapr, int version_id)
 {
     return spapr_xive_post_load(spapr->xive, version_id);
@@ -316,7 +276,6 @@ SpaprIrq spapr_irq_xive = {
     .free        = spapr_irq_free_xive,
     .print_info  = spapr_irq_print_info_xive,
     .dt_populate = spapr_dt_xive,
-    .cpu_intc_create = spapr_irq_cpu_intc_create_xive,
     .post_load   = spapr_irq_post_load_xive,
     .reset       = spapr_irq_reset_xive,
     .set_irq     = spapr_irq_set_irq_xive,
@@ -381,20 +340,6 @@ static void spapr_irq_dt_populate_dual(SpaprMachineState *spapr,
     spapr_irq_current(spapr)->dt_populate(spapr, nr_servers, fdt, phandle);
 }
 
-static void spapr_irq_cpu_intc_create_dual(SpaprMachineState *spapr,
-                                           PowerPCCPU *cpu, Error **errp)
-{
-    Error *local_err = NULL;
-
-    spapr_irq_xive.cpu_intc_create(spapr, cpu, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    spapr_irq_xics.cpu_intc_create(spapr, cpu, errp);
-}
-
 static int spapr_irq_post_load_dual(SpaprMachineState *spapr, int version_id)
 {
     /*
@@ -460,7 +405,6 @@ SpaprIrq spapr_irq_dual = {
     .free        = spapr_irq_free_dual,
     .print_info  = spapr_irq_print_info_dual,
     .dt_populate = spapr_irq_dt_populate_dual,
-    .cpu_intc_create = spapr_irq_cpu_intc_create_dual,
     .post_load   = spapr_irq_post_load_dual,
     .reset       = spapr_irq_reset_dual,
     .set_irq     = spapr_irq_set_irq_dual,
@@ -527,6 +471,30 @@ static int spapr_irq_check(SpaprMachineState *spapr, Error **errp)
 /*
  * sPAPR IRQ frontend routines for devices
  */
+#define ALL_INTCS(spapr_) \
+    { SPAPR_INTC((spapr_)->ics), SPAPR_INTC((spapr_)->xive), }
+
+int spapr_irq_cpu_intc_create(SpaprMachineState *spapr,
+                              PowerPCCPU *cpu, Error **errp)
+{
+    SpaprInterruptController *intcs[] = ALL_INTCS(spapr);
+    int i;
+    int rc;
+
+    for (i = 0; i < ARRAY_SIZE(intcs); i++) {
+        SpaprInterruptController *intc = intcs[i];
+        if (intc) {
+            SpaprInterruptControllerClass *sicc = SPAPR_INTC_GET_CLASS(intc);
+            rc = sicc->cpu_intc_create(intc, cpu, errp);
+            if (rc < 0) {
+                return rc;
+            }
+        }
+    }
+
+    return 0;
+}
+
 void spapr_irq_init(SpaprMachineState *spapr, Error **errp)
 {
     MachineState *machine = MACHINE(spapr);
@@ -762,7 +730,6 @@ SpaprIrq spapr_irq_xics_legacy = {
     .free        = spapr_irq_free_xics,
     .print_info  = spapr_irq_print_info_xics,
     .dt_populate = spapr_dt_xics,
-    .cpu_intc_create = spapr_irq_cpu_intc_create_xics,
     .post_load   = spapr_irq_post_load_xics,
     .reset       = spapr_irq_reset_xics,
     .set_irq     = spapr_irq_set_irq_xics,

include/hw/ppc/spapr_irq.h

@@ -43,8 +43,19 @@ typedef struct SpaprInterruptController SpaprInterruptController;
 
 typedef struct SpaprInterruptControllerClass {
     InterfaceClass parent;
+
+    /*
+     * These methods will typically be called on all intcs, active and
+     * inactive
+     */
+    int (*cpu_intc_create)(SpaprInterruptController *intc,
+                            PowerPCCPU *cpu, Error **errp);
 } SpaprInterruptControllerClass;
 
+int spapr_irq_cpu_intc_create(SpaprMachineState *spapr,
+                              PowerPCCPU *cpu, Error **errp);
+
+
 void spapr_irq_msi_init(SpaprMachineState *spapr, uint32_t nr_msis);
 int spapr_irq_msi_alloc(SpaprMachineState *spapr, uint32_t num, bool align,
                         Error **errp);
@@ -61,8 +72,6 @@ typedef struct SpaprIrq {
     void (*print_info)(SpaprMachineState *spapr, Monitor *mon);
     void (*dt_populate)(SpaprMachineState *spapr, uint32_t nr_servers,
                         void *fdt, uint32_t phandle);
-    void (*cpu_intc_create)(SpaprMachineState *spapr, PowerPCCPU *cpu,
-                            Error **errp);
     int (*post_load)(SpaprMachineState *spapr, int version_id);
     void (*reset)(SpaprMachineState *spapr, Error **errp);
     void (*set_irq)(void *opaque, int srcno, int val);