[PATCH v3 14/14] ppc/spapr: remove deprecated machine pseries-3.0

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

As per Qemu's deprecation policy [1], and the mailing list discussion
that happened on [2], pseries-3.0 is more than 6 years old since release
and therefore due for deletion as already deprecated for >3 years.

[1] https://www.qemu.org/docs/master/about/deprecated.html
[2] https://lore.kernel.org/qemu-devel/1d7c210e-d7a6-4233-b555-c99a41f3c4e2@kaod.org/

While at it, also remove related legacy irq hacks which are now obsolete.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 include/hw/ppc/spapr.h     |  1 -
 include/hw/ppc/spapr_irq.h |  1 -
 hw/ppc/spapr.c             | 27 +--------------------------
 hw/ppc/spapr_events.c      |  8 --------
 hw/ppc/spapr_irq.c         | 16 +---------------
 hw/ppc/spapr_pci.c         | 32 ++++----------------------------
 hw/ppc/spapr_vio.c         |  9 ---------
 7 files changed, 6 insertions(+), 88 deletions(-)

diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index af4aa1cb0f..bac3f8561b 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -143,7 +143,6 @@ struct SpaprMachineClass {
     /*< public >*/
     bool dr_phb_enabled;       /* enable dynamic-reconfig/hotplug of PHBs */
     bool update_dt_enabled;    /* enable KVMPPC_H_UPDATE_DT */
-    bool legacy_irq_allocation;
     uint32_t nr_xirqs;
     bool broken_host_serial_model; /* present real host info to the guest */
     bool pre_4_1_migration; /* don't migrate hpt-max-page-size */
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index cb9a85f657..5ddd1107c3 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -100,7 +100,6 @@ typedef struct SpaprIrq {
 } SpaprIrq;
 
 extern SpaprIrq spapr_irq_xics;
-extern SpaprIrq spapr_irq_xics_legacy;
 extern SpaprIrq spapr_irq_xive;
 extern SpaprIrq spapr_irq_dual;
 
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index f15467049a..8fa75ec541 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -3312,9 +3312,7 @@ static char *spapr_get_ic_mode(Object *obj, Error **errp)
 {
     SpaprMachineState *spapr = SPAPR_MACHINE(obj);
 
-    if (spapr->irq == &spapr_irq_xics_legacy) {
-        return g_strdup("legacy");
-    } else if (spapr->irq == &spapr_irq_xics) {
+    if (spapr->irq == &spapr_irq_xics) {
         return g_strdup("xics");
     } else if (spapr->irq == &spapr_irq_xive) {
         return g_strdup("xive");
@@ -3328,11 +3326,6 @@ static void spapr_set_ic_mode(Object *obj, const char *value, Error **errp)
 {
     SpaprMachineState *spapr = SPAPR_MACHINE(obj);
 
-    if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-        error_setg(errp, "This machine only uses the legacy XICS backend, don't pass ic-mode");
-        return;
-    }
-
     /* The legacy IRQ backend can not be set */
     if (strcmp(value, "xics") == 0) {
         spapr->irq = &spapr_irq_xics;
@@ -4999,24 +4992,6 @@ static void spapr_machine_3_1_class_options(MachineClass *mc)
 
 DEFINE_SPAPR_MACHINE(3, 1);
 
-/*
- * pseries-3.0
- */
-
-static void spapr_machine_3_0_class_options(MachineClass *mc)
-{
-    SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
-
-    spapr_machine_3_1_class_options(mc);
-    compat_props_add(mc->compat_props, hw_compat_3_0, hw_compat_3_0_len);
-
-    smc->legacy_irq_allocation = true;
-    smc->nr_xirqs = 0x400;
-    smc->irq = &spapr_irq_xics_legacy;
-}
-
-DEFINE_SPAPR_MACHINE(3, 0);
-
 static void spapr_machine_register_types(void)
 {
     type_register_static(&spapr_machine_info);
diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
index 4dbf8e2e2e..12ae5bf57c 100644
--- a/hw/ppc/spapr_events.c
+++ b/hw/ppc/spapr_events.c
@@ -1043,10 +1043,6 @@ void spapr_events_init(SpaprMachineState *spapr)
 {
     int epow_irq = SPAPR_IRQ_EPOW;
 
-    if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-        epow_irq = spapr_irq_findone(spapr, &error_fatal);
-    }
-
     spapr_irq_claim(spapr, epow_irq, false, &error_fatal);
 
     QTAILQ_INIT(&spapr->pending_events);
@@ -1067,10 +1063,6 @@ void spapr_events_init(SpaprMachineState *spapr)
     if (spapr->use_hotplug_event_source) {
         int hp_irq = SPAPR_IRQ_HOTPLUG;
 
-        if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-            hp_irq = spapr_irq_findone(spapr, &error_fatal);
-        }
-
         spapr_irq_claim(spapr, hp_irq, false, &error_fatal);
 
         spapr_event_sources_register(spapr->event_sources, EVENT_CLASS_HOT_PLUG,
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index aebd7eaabb..cb153651c3 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -33,11 +33,6 @@ static const TypeInfo spapr_intc_info = {
 
 static void spapr_irq_msi_init(SpaprMachineState *spapr)
 {
-    if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-        /* Legacy mode doesn't use this allocator */
-        return;
-    }
-
     spapr->irq_map_nr = spapr_irq_nr_msis(spapr);
     spapr->irq_map = bitmap_new(spapr->irq_map_nr);
 }
@@ -286,11 +281,7 @@ uint32_t spapr_irq_nr_msis(SpaprMachineState *spapr)
 {
     SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
 
-    if (smc->legacy_irq_allocation) {
-        return smc->nr_xirqs;
-    } else {
-        return SPAPR_XIRQ_BASE + smc->nr_xirqs - SPAPR_IRQ_MSI;
-    }
+    return SPAPR_XIRQ_BASE + smc->nr_xirqs - SPAPR_IRQ_MSI;
 }
 
 void spapr_irq_init(SpaprMachineState *spapr, Error **errp)
@@ -588,11 +579,6 @@ int spapr_irq_find(SpaprMachineState *spapr, int num, bool align, Error **errp)
     return first + ics->offset;
 }
 
-SpaprIrq spapr_irq_xics_legacy = {
-    .xics        = true,
-    .xive        = false,
-};
-
 static void spapr_irq_register_types(void)
 {
     type_register_static(&spapr_intc_info);
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 7e24084673..c2bf89b2fd 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -269,7 +269,6 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, SpaprMachineState *spapr,
                                 target_ulong args, uint32_t nret,
                                 target_ulong rets)
 {
-    SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
     uint32_t config_addr = rtas_ld(args, 0);
     uint64_t buid = rtas_ldq(args, 1);
     unsigned int func = rtas_ld(args, 3);
@@ -374,13 +373,8 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, SpaprMachineState *spapr,
     }
 
     /* Allocate MSIs */
-    if (smc->legacy_irq_allocation) {
-        irq = spapr_irq_find(spapr, req_num, ret_intr_type == RTAS_TYPE_MSI,
-                             &err);
-    } else {
-        irq = spapr_irq_msi_alloc(spapr, req_num,
-                                  ret_intr_type == RTAS_TYPE_MSI, &err);
-    }
+    irq = spapr_irq_msi_alloc(spapr, req_num,
+                              ret_intr_type == RTAS_TYPE_MSI, &err);
     if (err) {
         error_reportf_err(err, "Can't allocate MSIs for device %x: ",
                           config_addr);
@@ -394,9 +388,7 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, SpaprMachineState *spapr,
             if (i) {
                 spapr_irq_free(spapr, irq, i);
             }
-            if (!smc->legacy_irq_allocation) {
-                spapr_irq_msi_free(spapr, irq, req_num);
-            }
+            spapr_irq_msi_free(spapr, irq, req_num);
             error_reportf_err(err, "Can't allocate MSIs for device %x: ",
                               config_addr);
             rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
@@ -1776,12 +1768,9 @@ static void spapr_phb_unrealize(DeviceState *dev)
 static void spapr_phb_destroy_msi(gpointer opaque)
 {
     SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
-    SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
     SpaprPciMsi *msi = opaque;
 
-    if (!smc->legacy_irq_allocation) {
-        spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
-    }
+    spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
     spapr_irq_free(spapr, msi->first_irq, msi->num);
     g_free(msi);
 }
@@ -1795,7 +1784,6 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
     SpaprMachineState *spapr =
         (SpaprMachineState *) object_dynamic_cast(qdev_get_machine(),
                                                   TYPE_SPAPR_MACHINE);
-    SpaprMachineClass *smc = spapr ? SPAPR_MACHINE_GET_CLASS(spapr) : NULL;
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     SpaprPhbState *sphb = SPAPR_PCI_HOST_BRIDGE(sbd);
     PCIHostState *phb = PCI_HOST_BRIDGE(sbd);
@@ -1943,18 +1931,6 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < PCI_NUM_PINS; i++) {
         int irq = SPAPR_IRQ_PCI_LSI + sphb->index * PCI_NUM_PINS + i;
 
-        if (smc->legacy_irq_allocation) {
-            irq = spapr_irq_findone(spapr, errp);
-            if (irq < 0) {
-                error_prepend(errp, "can't allocate LSIs: ");
-                /*
-                 * Older machines will never support PHB hotplug, ie, this is an
-                 * init only path and QEMU will terminate. No need to rollback.
-                 */
-                return;
-            }
-        }
-
         if (spapr_irq_claim(spapr, irq, true, errp) < 0) {
             error_prepend(errp, "can't allocate LSIs: ");
             goto unrealize;
diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
index 6a5a7f57c7..c9ce796f63 100644
--- a/hw/ppc/spapr_vio.c
+++ b/hw/ppc/spapr_vio.c
@@ -507,15 +507,6 @@ static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
 
     dev->irq = spapr_vio_reg_to_irq(dev->reg);
 
-    if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
-        int irq = spapr_irq_findone(spapr, errp);
-
-        if (irq < 0) {
-            return;
-        }
-        dev->irq = irq;
-    }
-
     if (spapr_irq_claim(spapr, dev->irq, false, errp) < 0) {
         return;
     }
-- 
2.45.2