ppc/spapr: remove deprecated machine pseries-2.12

Commit 0cac0f1b964 marked pseries-2.12 machines as deprecated
with reasons mentioned in its commit log.
Removing pseries-2.12 specific code with this patch.

While at it, also remove pre-3.0-migration hacks introduced for backward
compatibility which are now turned useless.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

docs/about/deprecated.rst

@@ -243,14 +243,6 @@ These old machine types are quite neglected nowadays and thus might have
 various pitfalls with regards to live migration. Use a newer machine type
 instead.
 
-``pseries-2.1`` up to ``pseries-2.12`` (since 9.0)
-''''''''''''''''''''''''''''''''''''''''''''''''''
-
-Older pseries machines before version 3.0 have undergone many changes
-to correct issues, mostly regarding migration compatibility. These are
-no longer maintained and removing them will make the code easier to
-read and maintain. Use versions 3.0 and above as a replacement.
-
 PPC 405 ``ref405ep`` machine (since 9.1)
 ''''''''''''''''''''''''''''''''''''''''
 

hw/ppc/spapr.c

@@ -5015,31 +5015,6 @@ static void spapr_machine_3_0_class_options(MachineClass *mc)
 
 DEFINE_SPAPR_MACHINE(3, 0);
 
-/*
- * pseries-2.12
- */
-static void spapr_machine_2_12_class_options(MachineClass *mc)
-{
-    SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
-    static GlobalProperty compat[] = {
-        { TYPE_POWERPC_CPU, "pre-3.0-migration", "on" },
-        { TYPE_SPAPR_CPU_CORE, "pre-3.0-migration", "on" },
-    };
-
-    spapr_machine_3_0_class_options(mc);
-    compat_props_add(mc->compat_props, hw_compat_2_12, hw_compat_2_12_len);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
-
-    /* We depend on kvm_enabled() to choose a default value for the
-     * hpt-max-page-size capability. Of course we can't do it here
-     * because this is too early and the HW accelerator isn't initialized
-     * yet. Postpone this to machine init (see default_caps_with_cpu()).
-     */
-    smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = 0;
-}
-
-DEFINE_SPAPR_MACHINE(2, 12);
-
 static void spapr_machine_register_types(void)
 {
     type_register_static(&spapr_machine_info);

hw/ppc/spapr_cpu_core.c

@@ -197,9 +197,7 @@ static void spapr_unrealize_vcpu(PowerPCCPU *cpu, SpaprCpuCore *sc)
 {
     CPUPPCState *env = &cpu->env;
 
-    if (!sc->pre_3_0_migration) {
-        vmstate_unregister(NULL, &vmstate_spapr_cpu_state, cpu->machine_data);
-    }
+    vmstate_unregister(NULL, &vmstate_spapr_cpu_state, cpu->machine_data);
     spapr_irq_cpu_intc_destroy(SPAPR_MACHINE(qdev_get_machine()), cpu);
     cpu_ppc_tb_free(env);
     qdev_unrealize(DEVICE(cpu));
@@ -285,10 +283,8 @@ static bool spapr_realize_vcpu(PowerPCCPU *cpu, SpaprMachineState *spapr,
         return false;
     }
 
-    if (!sc->pre_3_0_migration) {
-        vmstate_register(NULL, cs->cpu_index, &vmstate_spapr_cpu_state,
-                         cpu->machine_data);
-    }
+    vmstate_register(NULL, cs->cpu_index, &vmstate_spapr_cpu_state,
+                     cpu->machine_data);
     return true;
 }
 
@@ -366,8 +362,6 @@ static void spapr_cpu_core_realize(DeviceState *dev, Error **errp)
 
 static Property spapr_cpu_core_properties[] = {
     DEFINE_PROP_INT32("node-id", SpaprCpuCore, node_id, CPU_UNSET_NUMA_NODE_ID),
-    DEFINE_PROP_BOOL("pre-3.0-migration", SpaprCpuCore, pre_3_0_migration,
-                     false),
     DEFINE_PROP_END_OF_LIST()
 };
 

include/hw/ppc/spapr_cpu_core.h

@@ -28,7 +28,6 @@ struct SpaprCpuCore {
     /*< public >*/
     PowerPCCPU **threads;
     int node_id;
-    bool pre_3_0_migration; /* older machine don't know about SpaprCpuState */
 };
 
 struct SpaprCpuCoreClass {

target/ppc/cpu.h

@@ -1455,10 +1455,6 @@ struct ArchCPU {
     /* Those resources are used only during code translation */
     /* opcode handlers */
     opc_handler_t *opcodes[PPC_CPU_OPCODES_LEN];
-
-    /* Fields related to migration compatibility hacks */
-    bool pre_3_0_migration;
-    int32_t mig_slb_nr;
 };
 
 /**

target/ppc/cpu_init.c

@@ -7452,8 +7452,7 @@ static void ppc_disas_set_info(CPUState *cs, disassemble_info *info)
 }
 
 static Property ppc_cpu_properties[] = {
-    DEFINE_PROP_BOOL("pre-3.0-migration", PowerPCCPU, pre_3_0_migration,
-                     false),
+    /* add default property here */
     DEFINE_PROP_END_OF_LIST(),
 };
 

target/ppc/machine.c

@@ -118,15 +118,6 @@ static const VMStateInfo vmstate_info_vsr = {
 #define VMSTATE_VSR_ARRAY(_f, _s, _n)                             \
     VMSTATE_VSR_ARRAY_V(_f, _s, _n, 0)
 
-#if defined(TARGET_PPC64)
-static bool cpu_pre_3_0_migration(void *opaque, int version_id)
-{
-    PowerPCCPU *cpu = opaque;
-
-    return cpu->pre_3_0_migration;
-}
-#endif
-
 static int cpu_pre_save(void *opaque)
 {
     PowerPCCPU *cpu = opaque;
@@ -154,12 +145,6 @@ static int cpu_pre_save(void *opaque)
         env->spr[SPR_IBAT4U + 2 * i + 1] = env->IBAT[1][i + 4];
     }
 
-    if (cpu->pre_3_0_migration) {
-        if (cpu->hash64_opts) {
-            cpu->mig_slb_nr = cpu->hash64_opts->slb_size;
-        }
-    }
-
     /* Used to retain migration compatibility for pre 6.0 for 601 machines. */
     env->hflags_compat_nmsr = 0;
 
@@ -503,12 +488,11 @@ static int slb_post_load(void *opaque, int version_id)
 
 static const VMStateDescription vmstate_slb = {
     .name = "cpu/slb",
-    .version_id = 1,
+    .version_id = 2,
     .minimum_version_id = 1,
     .needed = slb_needed,
     .post_load = slb_post_load,
     .fields = (const VMStateField[]) {
-        VMSTATE_INT32_TEST(mig_slb_nr, PowerPCCPU, cpu_pre_3_0_migration),
         VMSTATE_SLB_ARRAY(env.slb, PowerPCCPU, MAX_SLB_ENTRIES),
         VMSTATE_END_OF_LIST()
     }