[Qemu-devel] [PATCH 01/10] spapr: modify the prototype of the cpu_intc_create() method

["Cédric Le Goater" <clg@kaod.org>]

Today, the interrupt presenter is linked to a CPU using the
cpu_intc_create() method of the sPAPR IRQ backend. The resulting
object is assigned to the PowerPCCPU 'intc' pointer whatever the
interrupt mode, XICS or XIVE.

To support the 'dual' interrupt mode, we will need to distinguish
between the two presenter objects and for that, we plan to introduce a
second interrupt presenter object pointer under the PowerPCCPU. The
modifications below move the assignment of the presenter object under
the cpu_intc_create() method to prepare ground for the future changes.

Both sPAPR and PowerNV machines are impacted.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/ppc/pnv.h       |  2 +-
 include/hw/ppc/spapr_irq.h |  4 ++--
 hw/ppc/pnv.c               | 23 ++++++++++++++++-------
 hw/ppc/pnv_core.c          |  2 +-
 hw/ppc/spapr_cpu_core.c    |  2 +-
 hw/ppc/spapr_irq.c         | 34 ++++++++++++++++++++++++++--------
 6 files changed, 47 insertions(+), 20 deletions(-)

diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
index 86d5f54e5459..6b65397b7ebf 100644
--- a/include/hw/ppc/pnv.h
+++ b/include/hw/ppc/pnv.h
@@ -98,7 +98,7 @@ typedef struct PnvChipClass {
     DeviceRealize parent_realize;
 
     uint32_t (*core_pir)(PnvChip *chip, uint32_t core_id);
-    Object *(*intc_create)(PnvChip *chip, Object *child, Error **errp);
+    void (*intc_create)(PnvChip *chip, PowerPCCPU *cpu, Error **errp);
     ISABus *(*isa_create)(PnvChip *chip, Error **errp);
 } PnvChipClass;
 
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index b34d5a00381b..d03d4d7ce687 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -42,8 +42,8 @@ typedef struct sPAPRIrq {
     void (*print_info)(sPAPRMachineState *spapr, Monitor *mon);
     void (*dt_populate)(sPAPRMachineState *spapr, uint32_t nr_servers,
                         void *fdt, uint32_t phandle);
-    Object *(*cpu_intc_create)(sPAPRMachineState *spapr, Object *cpu,
-                               Error **errp);
+    void (*cpu_intc_create)(sPAPRMachineState *spapr, PowerPCCPU *cpu,
+                            Error **errp);
     int (*post_load)(sPAPRMachineState *spapr, int version_id);
     void (*reset)(sPAPRMachineState *spapr, Error **errp);
 } sPAPRIrq;
diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 346f5e7aedb5..8e83be54fca1 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -668,11 +668,20 @@ static uint32_t pnv_chip_core_pir_p8(PnvChip *chip, uint32_t core_id)
     return (chip->chip_id << 7) | (core_id << 3);
 }
 
-static Object *pnv_chip_power8_intc_create(PnvChip *chip, Object *child,
-                                           Error **errp)
+static void pnv_chip_power8_intc_create(PnvChip *chip, PowerPCCPU *cpu,
+                                        Error **errp)
 {
-    return icp_create(child, TYPE_PNV_ICP, XICS_FABRIC(qdev_get_machine()),
-                      errp);
+    Error *local_err = NULL;
+    Object *obj;
+
+    obj = icp_create(OBJECT(cpu), TYPE_PNV_ICP, XICS_FABRIC(qdev_get_machine()),
+                     &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    cpu->intc = obj;
 }
 
 /*
@@ -690,10 +699,10 @@ static uint32_t pnv_chip_core_pir_p9(PnvChip *chip, uint32_t core_id)
     return (chip->chip_id << 8) | (core_id << 2);
 }
 
-static Object *pnv_chip_power9_intc_create(PnvChip *chip, Object *child,
-                                           Error **errp)
+static void pnv_chip_power9_intc_create(PnvChip *chip, PowerPCCPU *cpu,
+                                        Error **errp)
 {
-    return NULL;
+    return;
 }
 
 /* Allowed core identifiers on a POWER8 Processor Chip :
diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c
index ad1bcc79904f..120273774874 100644
--- a/hw/ppc/pnv_core.c
+++ b/hw/ppc/pnv_core.c
@@ -114,7 +114,7 @@ static void pnv_realize_vcpu(PowerPCCPU *cpu, PnvChip *chip, Error **errp)
         return;
     }
 
-    cpu->intc = pcc->intc_create(chip, OBJECT(cpu), &local_err);
+    pcc->intc_create(chip, cpu, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         return;
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 82666436e9b4..2739b2a4b818 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -232,7 +232,7 @@ static void spapr_realize_vcpu(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     qemu_register_reset(spapr_cpu_reset, cpu);
     spapr_cpu_reset(cpu);
 
-    cpu->intc = spapr->irq->cpu_intc_create(spapr, OBJECT(cpu), &local_err);
+    spapr->irq->cpu_intc_create(spapr, cpu, &local_err);
     if (local_err) {
         goto error_unregister;
     }
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index 7b3b5afec212..2d2e17b66533 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -190,10 +190,20 @@ static void spapr_irq_print_info_xics(sPAPRMachineState *spapr, Monitor *mon)
     ics_pic_print_info(spapr->ics, mon);
 }
 
-static Object *spapr_irq_cpu_intc_create_xics(sPAPRMachineState *spapr,
-                                              Object *cpu, Error **errp)
+static void spapr_irq_cpu_intc_create_xics(sPAPRMachineState *spapr,
+                                           PowerPCCPU *cpu, Error **errp)
 {
-    return icp_create(cpu, spapr->icp_type, XICS_FABRIC(spapr), errp);
+    Error *local_err = NULL;
+    Object *obj;
+
+    obj = icp_create(OBJECT(cpu), spapr->icp_type, XICS_FABRIC(spapr),
+                     &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    cpu->intc = obj;
 }
 
 static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id)
@@ -301,17 +311,25 @@ static void spapr_irq_print_info_xive(sPAPRMachineState *spapr,
     spapr_xive_pic_print_info(spapr->xive, mon);
 }
 
-static Object *spapr_irq_cpu_intc_create_xive(sPAPRMachineState *spapr,
-                                              Object *cpu, Error **errp)
+static void spapr_irq_cpu_intc_create_xive(sPAPRMachineState *spapr,
+                                           PowerPCCPU *cpu, Error **errp)
 {
-    Object *obj = xive_tctx_create(cpu, XIVE_ROUTER(spapr->xive), errp);
+    Error *local_err = NULL;
+    Object *obj;
+
+    obj = xive_tctx_create(OBJECT(cpu), XIVE_ROUTER(spapr->xive), &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    cpu->intc = obj;
 
     /*
      * (TCG) Early setting the OS CAM line for hotplugged CPUs as they
-     * don't benificiate from the reset of the XIVE IRQ backend
+     * don't beneficiate from the reset of the XIVE IRQ backend
      */
     spapr_xive_set_tctx_os_cam(XIVE_TCTX(obj));
-    return obj;
 }
 
 static int spapr_irq_post_load_xive(sPAPRMachineState *spapr, int version_id)
-- 
2.20.1