[PATCH v2 19/33] spapr: Eliminate SpaprIrq::init hook

[David Gibson]

This method is used to set up the interrupt backends for the current
configuration.  However, this means some confusing redirection between
the "dual" mode init and the init hooks for xics only and xive only modes.

Since we now have simple flags indicating whether XICS and/or XIVE are
supported, it's easier to just open code each initialization directly in
spapr_irq_init().  This will also make some future cleanups simpler.

Signed-off-by: David Gibson <address@hidden>
Reviewed-by: Cédric Le Goater <address@hidden>
Reviewed-by: Greg Kurz <address@hidden>
---
 hw/ppc/spapr_irq.c          | 137 +++++++++++++++++-------------------
 include/hw/ppc/spapr_irq.h  |   1 -
 include/hw/ppc/xics_spapr.h |   1 +
 3 files changed, 64 insertions(+), 75 deletions(-)

diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index 0aec5b0f0e..5e448b1fd4 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -92,26 +92,6 @@ static void spapr_irq_init_kvm(SpaprMachineState *spapr,
  * XICS IRQ backend.
  */
 
-static void spapr_irq_init_xics(SpaprMachineState *spapr, Error **errp)
-{
-    Object *obj;
-    Error *local_err = NULL;
-
-    obj = object_new(TYPE_ICS_SPAPR);
-    object_property_add_child(OBJECT(spapr), "ics", obj, &error_abort);
-    object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
-                                   &error_fatal);
-    object_property_set_int(obj, spapr->irq->nr_xirqs,
-                            "nr-irqs",  &error_fatal);
-    object_property_set_bool(obj, true, "realized", &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    spapr->ics = ICS_SPAPR(obj);
-}
-
 static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,
                                 Error **errp)
 {
@@ -213,7 +193,6 @@ SpaprIrq spapr_irq_xics = {
     .xics        = true,
     .xive        = false,
 
-    .init        = spapr_irq_init_xics,
     .claim       = spapr_irq_claim_xics,
     .free        = spapr_irq_free_xics,
     .print_info  = spapr_irq_print_info_xics,
@@ -228,36 +207,6 @@ SpaprIrq spapr_irq_xics = {
 /*
  * XIVE IRQ backend.
  */
-static void spapr_irq_init_xive(SpaprMachineState *spapr, Error **errp)
-{
-    uint32_t nr_servers = spapr_max_server_number(spapr);
-    DeviceState *dev;
-    int i;
-
-    dev = qdev_create(NULL, TYPE_SPAPR_XIVE);
-    qdev_prop_set_uint32(dev, "nr-irqs",
-                         spapr->irq->nr_xirqs + SPAPR_XIRQ_BASE);
-    /*
-     * 8 XIVE END structures per CPU. One for each available priority
-     */
-    qdev_prop_set_uint32(dev, "nr-ends", nr_servers << 3);
-    qdev_init_nofail(dev);
-
-    spapr->xive = SPAPR_XIVE(dev);
-
-    /* Enable the CPU IPIs */
-    for (i = 0; i < nr_servers; ++i) {
-        Error *local_err = NULL;
-
-        spapr_xive_irq_claim(spapr->xive, SPAPR_IRQ_IPI + i, false, 
&local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-            return;
-        }
-    }
-
-    spapr_xive_hcall_init(spapr);
-}
 
 static int spapr_irq_claim_xive(SpaprMachineState *spapr, int irq, bool lsi,
                                 Error **errp)
@@ -357,7 +306,6 @@ SpaprIrq spapr_irq_xive = {
     .xics        = false,
     .xive        = true,
 
-    .init        = spapr_irq_init_xive,
     .claim       = spapr_irq_claim_xive,
     .free        = spapr_irq_free_xive,
     .print_info  = spapr_irq_print_info_xive,
@@ -388,23 +336,6 @@ static SpaprIrq *spapr_irq_current(SpaprMachineState 
*spapr)
         &spapr_irq_xive : &spapr_irq_xics;
 }
 
-static void spapr_irq_init_dual(SpaprMachineState *spapr, Error **errp)
-{
-    Error *local_err = NULL;
-
-    spapr_irq_xics.init(spapr, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    spapr_irq_xive.init(spapr, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-}
-
 static int spapr_irq_claim_dual(SpaprMachineState *spapr, int irq, bool lsi,
                                 Error **errp)
 {
@@ -519,7 +450,6 @@ SpaprIrq spapr_irq_dual = {
     .xics        = true,
     .xive        = true,
 
-    .init        = spapr_irq_init_dual,
     .claim       = spapr_irq_claim_dual,
     .free        = spapr_irq_free_dual,
     .print_info  = spapr_irq_print_info_dual,
@@ -607,8 +537,7 @@ void spapr_irq_init(SpaprMachineState *spapr, Error **errp)
 
     spapr_irq_check(spapr, &local_err);
     if (local_err) {
-        error_propagate(errp, local_err);
-        return;
+        goto out;
     }
 
     /* Initialize the MSI IRQ allocator. */
@@ -616,10 +545,71 @@ void spapr_irq_init(SpaprMachineState *spapr, Error 
**errp)
         spapr_irq_msi_init(spapr, spapr->irq->nr_msis);
     }
 
-    spapr->irq->init(spapr, errp);
+    if (spapr->irq->xics) {
+        Object *obj;
+
+        obj = object_new(TYPE_ICS_SPAPR);
+        object_property_add_child(OBJECT(spapr), "ics", obj, &local_err);
+        if (local_err) {
+            goto out;
+        }
+
+        object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
+                                       &local_err);
+        if (local_err) {
+            goto out;
+        }
+
+        object_property_set_int(obj, spapr->irq->nr_xirqs, "nr-irqs",
+                                &local_err);
+        if (local_err) {
+            goto out;
+        }
+
+        object_property_set_bool(obj, true, "realized", &local_err);
+        if (local_err) {
+            goto out;
+        }
+
+        spapr->ics = ICS_SPAPR(obj);
+    }
+
+    if (spapr->irq->xive) {
+        uint32_t nr_servers = spapr_max_server_number(spapr);
+        DeviceState *dev;
+        int i;
+
+        dev = qdev_create(NULL, TYPE_SPAPR_XIVE);
+        qdev_prop_set_uint32(dev, "nr-irqs",
+                             spapr->irq->nr_xirqs + SPAPR_XIRQ_BASE);
+        /*
+         * 8 XIVE END structures per CPU. One for each available
+         * priority
+         */
+        qdev_prop_set_uint32(dev, "nr-ends", nr_servers << 3);
+        qdev_init_nofail(dev);
+
+        spapr->xive = SPAPR_XIVE(dev);
+
+        /* Enable the CPU IPIs */
+        for (i = 0; i < nr_servers; ++i) {
+            Error *local_err = NULL;
+
+            spapr_xive_irq_claim(spapr->xive, SPAPR_IRQ_IPI + i,
+                                 false, &local_err);
+            if (local_err) {
+                goto out;
+            }
+        }
+
+        spapr_xive_hcall_init(spapr);
+    }
 
     spapr->qirqs = qemu_allocate_irqs(spapr->irq->set_irq, spapr,
                                       spapr->irq->nr_xirqs + SPAPR_XIRQ_BASE);
+
+out:
+    error_propagate(errp, local_err);
 }
 
 int spapr_irq_claim(SpaprMachineState *spapr, int irq, bool lsi, Error **errp)
@@ -763,7 +753,6 @@ SpaprIrq spapr_irq_xics_legacy = {
     .xics        = true,
     .xive        = false,
 
-    .init        = spapr_irq_init_xics,
     .claim       = spapr_irq_claim_xics,
     .free        = spapr_irq_free_xics,
     .print_info  = spapr_irq_print_info_xics,
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index d3f3b85eb9..69a37f608e 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -42,7 +42,6 @@ typedef struct SpaprIrq {
     bool        xics;
     bool        xive;
 
-    void (*init)(SpaprMachineState *spapr, Error **errp);
     int (*claim)(SpaprMachineState *spapr, int irq, bool lsi, Error **errp);
     void (*free)(SpaprMachineState *spapr, int irq);
     void (*print_info)(SpaprMachineState *spapr, Monitor *mon);
diff --git a/include/hw/ppc/xics_spapr.h b/include/hw/ppc/xics_spapr.h
index 0b35e85c26..0a32a86e3e 100644
--- a/include/hw/ppc/xics_spapr.h
+++ b/include/hw/ppc/xics_spapr.h
@@ -32,6 +32,7 @@
 #define TYPE_ICS_SPAPR "ics-spapr"
 #define ICS_SPAPR(obj) OBJECT_CHECK(ICSState, (obj), TYPE_ICS_SPAPR)
 
+void ics_spapr_create(SpaprMachineState *spapr, int nr_xirqs, Error **errp);
 void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
                    uint32_t phandle);
 int xics_kvm_connect(SpaprMachineState *spapr, Error **errp);
-- 
2.21.0