[RFC v8 26/27] hw/core/cpu: call qemu_init_vcpu in cpu_common_realizefn

[Claudio Fontana <cfontana@suse.de>]

move the call to qemu_init_vcpu inside cpu_common_realizefn,
so it does not need to be done explicitly in each target cpu.

This makes it a little bit better, but still the way realize
is done continues to be bad; ideally the cpu_list_add would
be done in common_cpu, and in this case we could avoid even
more additional calls in target/xxx/cpu.c,

but this cannot happen because target cpu code, plugins, etc
now all rely on cpu->index, since no particular order was
defined previously, so we are stuck with the freak call order
for the target cpu realizefn.

After this patch the target/xxx/cpu.c realizefn body is now:

void mycpu_realizefn(DeviceState *dev, Error **errp)
{
    /* ... */
    cpu_exec_realizefn(CPU_STATE(dev), errp);

    /* ... anything that needs done pre-qemu_vcpu_init */

    xcc->parent_realize(dev, errp); /* does qemu_vcpu_init */

    /* ... anything that needs to be done after qemu_vcpu_init */
}

Note: better do some testing for all targets for this.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
 hw/core/cpu.c                   | 2 ++
 target/alpha/cpu.c              | 5 +----
 target/arm/cpu.c                | 4 +---
 target/avr/cpu.c                | 3 +--
 target/cris/cpu.c               | 2 --
 target/hppa/cpu.c               | 1 -
 target/i386/cpu.c               | 5 +----
 target/lm32/cpu.c               | 3 ---
 target/m68k/cpu.c               | 2 --
 target/microblaze/cpu.c         | 9 +++------
 target/mips/cpu.c               | 2 --
 target/moxie/cpu.c              | 4 +---
 target/nios2/cpu.c              | 4 +---
 target/openrisc/cpu.c           | 4 +---
 target/ppc/translate_init.c.inc | 5 ++---
 target/riscv/cpu.c              | 8 +++-----
 target/rx/cpu.c                 | 8 +++-----
 target/s390x/cpu.c              | 3 +--
 target/sh4/cpu.c                | 2 --
 target/sparc/cpu.c              | 4 +---
 target/tilegx/cpu.c             | 2 --
 target/tricore/cpu.c            | 2 --
 target/unicore32/cpu.c          | 6 +-----
 target/xtensa/cpu.c             | 2 --
 24 files changed, 23 insertions(+), 69 deletions(-)

diff --git a/hw/core/cpu.c b/hw/core/cpu.c
index 1f04aab16b..f41c009e6c 100644
--- a/hw/core/cpu.c
+++ b/hw/core/cpu.c
@@ -318,6 +318,8 @@ static void cpu_common_realizefn(DeviceState *dev, Error **errp)
     CPUState *cpu = CPU(dev);
     Object *machine = qdev_get_machine();
 
+    qemu_init_vcpu(cpu);
+
     /* qdev_get_machine() can return something that's not TYPE_MACHINE
      * if this is one of the user-only emulators; in that case there's
      * no need to check the ignore_memory_transaction_failures board flag.
diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c
index 0369d5a99c..9bec7dcd6b 100644
--- a/target/alpha/cpu.c
+++ b/target/alpha/cpu.c
@@ -56,18 +56,15 @@ static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
 
 static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
 {
-    CPUState *cs = CPU(dev);
     AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
     Error *local_err = NULL;
 
-    cpu_exec_realizefn(cs, &local_err);
+    cpu_exec_realizefn(CPU(dev), &local_err);
     if (local_err != NULL) {
         error_propagate(errp, local_err);
         return;
     }
 
-    qemu_init_vcpu(cs);
-
     acc->parent_realize(dev, errp);
 }
 
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 20cbfaea51..128a8f3e28 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1857,10 +1857,8 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
         }
     }
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     acc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static ObjectClass *arm_cpu_class_by_name(const char *cpu_model)
diff --git a/target/avr/cpu.c b/target/avr/cpu.c
index 699055de7c..d2b10b99d9 100644
--- a/target/avr/cpu.c
+++ b/target/avr/cpu.c
@@ -97,10 +97,9 @@ static void avr_cpu_realizefn(DeviceState *dev, Error **errp)
         error_propagate(errp, local_err);
         return;
     }
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
 
     mcc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static void avr_cpu_set_int(void *opaque, int irq, int level)
diff --git a/target/cris/cpu.c b/target/cris/cpu.c
index 9222717f3e..8402141184 100644
--- a/target/cris/cpu.c
+++ b/target/cris/cpu.c
@@ -135,8 +135,6 @@ static void cris_cpu_realizefn(DeviceState *dev, Error **errp)
     }
 
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     ccc->parent_realize(dev, errp);
 }
 
diff --git a/target/hppa/cpu.c b/target/hppa/cpu.c
index e2d79f954e..472c03e36b 100644
--- a/target/hppa/cpu.c
+++ b/target/hppa/cpu.c
@@ -99,7 +99,6 @@ static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
     acc->parent_realize(dev, errp);
 
 #ifndef CONFIG_USER_ONLY
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 25998c0122..aabb8edfe0 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6419,8 +6419,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
 
     mce_init(cpu);
 
-    qemu_init_vcpu(cs);
-
+    xcc->parent_realize(dev, &local_err);
     /*
      * Most Intel and certain AMD CPUs support hyperthreading. Even though QEMU
      * fixes this issue by adjusting CPUID_0000_0001_EBX and CPUID_8000_0008_ECX
@@ -6447,8 +6446,6 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
     }
     cpu_reset(cs);
 
-    xcc->parent_realize(dev, &local_err);
-
 out:
     if (local_err != NULL) {
         error_propagate(errp, local_err);
diff --git a/target/lm32/cpu.c b/target/lm32/cpu.c
index bbe1405e32..72d1a51d62 100644
--- a/target/lm32/cpu.c
+++ b/target/lm32/cpu.c
@@ -133,9 +133,6 @@ static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
     }
 
     cpu_reset(cs);
-
-    qemu_init_vcpu(cs);
-
     lcc->parent_realize(dev, errp);
 }
 
diff --git a/target/m68k/cpu.c b/target/m68k/cpu.c
index bc109faa21..f8ea599c1c 100644
--- a/target/m68k/cpu.c
+++ b/target/m68k/cpu.c
@@ -248,8 +248,6 @@ static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
     m68k_cpu_init_gdb(cpu);
 
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     mcc->parent_realize(dev, errp);
 }
 
diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index 6e660a27b8..42cfc214ff 100644
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -145,15 +145,14 @@ static void mb_disas_set_info(CPUState *cpu, disassemble_info *info)
 
 static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
 {
-    CPUState *cs = CPU(dev);
     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(dev);
-    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
+    MicroBlazeCPU *cpu = MICROBLAZE_CPU(dev);
     uint8_t version_code = 0;
     const char *version;
     int i = 0;
     Error *local_err = NULL;
 
-    cpu_exec_realizefn(cs, &local_err);
+    cpu_exec_realizefn(CPU(dev), &local_err);
     if (local_err != NULL) {
         error_propagate(errp, local_err);
         return;
@@ -165,7 +164,7 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
+    mcc->parent_realize(dev, errp);
 
     version = cpu->cfg.version ? cpu->cfg.version : DEFAULT_CPU_VERSION;
     for (i = 0; mb_cpu_lookup[i].name && version; i++) {
@@ -231,8 +230,6 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
     cpu->cfg.mmu_tlb_access = 3;
     cpu->cfg.mmu_zones = 16;
     cpu->cfg.addr_mask = MAKE_64BIT_MASK(0, cpu->cfg.addr_size);
-
-    mcc->parent_realize(dev, errp);
 }
 
 static void mb_cpu_initfn(Object *obj)
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index 1f7573d319..3a457f723b 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -182,8 +182,6 @@ static void mips_cpu_realizefn(DeviceState *dev, Error **errp)
     cpu_mips_realize_env(&cpu->env);
 
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     mcc->parent_realize(dev, errp);
 }
 
diff --git a/target/moxie/cpu.c b/target/moxie/cpu.c
index 1177d092c1..c9a593ecd0 100644
--- a/target/moxie/cpu.c
+++ b/target/moxie/cpu.c
@@ -66,10 +66,8 @@ static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     mcc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static void moxie_cpu_initfn(Object *obj)
diff --git a/target/nios2/cpu.c b/target/nios2/cpu.c
index a96b74b00c..77928ab61a 100644
--- a/target/nios2/cpu.c
+++ b/target/nios2/cpu.c
@@ -92,10 +92,8 @@ static void nios2_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     ncc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static bool nios2_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index e6d1c9764b..79485285da 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -77,10 +77,8 @@ static void openrisc_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     occ->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static void openrisc_cpu_initfn(Object *obj)
diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
index e83000b2fb..3155c2cedc 100644
--- a/target/ppc/translate_init.c.inc
+++ b/target/ppc/translate_init.c.inc
@@ -10093,7 +10093,7 @@ static int ppc_fixup_cpu(PowerPCCPU *cpu)
     return 0;
 }
 
-static void ppc_cpu_realize(DeviceState *dev, Error **errp)
+static void ppc_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     PowerPCCPU *cpu = POWERPC_CPU(dev);
@@ -10143,7 +10143,6 @@ static void ppc_cpu_realize(DeviceState *dev, Error **errp)
     gdb_register_coprocessor(cs, gdb_get_spr_reg, gdb_set_spr_reg,
                              pcc->gdb_num_sprs, "power-spr.xml", 0);
 #endif
-    qemu_init_vcpu(cs);
 
     pcc->parent_realize(dev, errp);
 
@@ -10894,7 +10893,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data)
     CPUClass *cc = CPU_CLASS(oc);
     DeviceClass *dc = DEVICE_CLASS(oc);
 
-    device_class_set_parent_realize(dc, ppc_cpu_realize,
+    device_class_set_parent_realize(dc, ppc_cpu_realizefn,
                                     &pcc->parent_realize);
     device_class_set_parent_unrealize(dc, ppc_cpu_unrealize,
                                       &pcc->parent_unrealize);
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 022b4271d4..77a1dbcb88 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -341,7 +341,7 @@ static void riscv_cpu_disas_set_info(CPUState *s, disassemble_info *info)
 #endif
 }
 
-static void riscv_cpu_realize(DeviceState *dev, Error **errp)
+static void riscv_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     RISCVCPU *cpu = RISCV_CPU(dev);
@@ -486,10 +486,8 @@ static void riscv_cpu_realize(DeviceState *dev, Error **errp)
 
     riscv_cpu_register_gdb_regs_for_features(cs);
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     mcc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static void riscv_cpu_init(Object *obj)
@@ -532,7 +530,7 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
     CPUClass *cc = CPU_CLASS(c);
     DeviceClass *dc = DEVICE_CLASS(c);
 
-    device_class_set_parent_realize(dc, riscv_cpu_realize,
+    device_class_set_parent_realize(dc, riscv_cpu_realizefn,
                                     &mcc->parent_realize);
 
     device_class_set_parent_reset(dc, riscv_cpu_reset, &mcc->parent_reset);
diff --git a/target/rx/cpu.c b/target/rx/cpu.c
index c815533223..07a76405cd 100644
--- a/target/rx/cpu.c
+++ b/target/rx/cpu.c
@@ -105,7 +105,7 @@ static ObjectClass *rx_cpu_class_by_name(const char *cpu_model)
     return oc;
 }
 
-static void rx_cpu_realize(DeviceState *dev, Error **errp)
+static void rx_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     RXCPUClass *rcc = RX_CPU_GET_CLASS(dev);
@@ -117,10 +117,8 @@ static void rx_cpu_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
-    cpu_reset(cs);
-
     rcc->parent_realize(dev, errp);
+    cpu_reset(cs);
 }
 
 static void rx_cpu_set_irq(void *opaque, int no, int request)
@@ -178,7 +176,7 @@ static void rx_cpu_class_init(ObjectClass *klass, void *data)
     CPUClass *cc = CPU_CLASS(klass);
     RXCPUClass *rcc = RX_CPU_CLASS(klass);
 
-    device_class_set_parent_realize(dc, rx_cpu_realize,
+    device_class_set_parent_realize(dc, rx_cpu_realizefn,
                                     &rcc->parent_realize);
     device_class_set_parent_reset(dc, rx_cpu_reset,
                                   &rcc->parent_reset);
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 04856076b3..20b87693a1 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -232,8 +232,8 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
     qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
 #endif
     s390_cpu_gdb_init(cs);
-    qemu_init_vcpu(cs);
 
+    scc->parent_realize(dev, &err);
     /*
      * KVM requires the initial CPU reset ioctl to be executed on the target
      * CPU thread. CPU hotplug under single-threaded TCG will not work with
@@ -246,7 +246,6 @@ static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
         cpu_reset(cs);
     }
 
-    scc->parent_realize(dev, &err);
 out:
     error_propagate(errp, err);
 }
diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c
index 7a9019edec..50519e1a61 100644
--- a/target/sh4/cpu.c
+++ b/target/sh4/cpu.c
@@ -185,8 +185,6 @@ static void superh_cpu_realizefn(DeviceState *dev, Error **errp)
     }
 
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     scc->parent_realize(dev, errp);
 }
 
diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index 760e0ea92c..f3e628ada9 100644
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -738,9 +738,9 @@ static void sparc_cpu_realizefn(DeviceState *dev, Error **errp)
 {
     CPUState *cs = CPU(dev);
     SPARCCPUClass *scc = SPARC_CPU_GET_CLASS(dev);
-    Error *local_err = NULL;
     SPARCCPU *cpu = SPARC_CPU(dev);
     CPUSPARCState *env = &cpu->env;
+    Error *local_err = NULL;
 
 #if defined(CONFIG_USER_ONLY)
     if ((env->def.features & CPU_FEATURE_FLOAT)) {
@@ -768,8 +768,6 @@ static void sparc_cpu_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    qemu_init_vcpu(cs);
-
     scc->parent_realize(dev, errp);
 }
 
diff --git a/target/tilegx/cpu.c b/target/tilegx/cpu.c
index 75b3a4bae3..d887eafe47 100644
--- a/target/tilegx/cpu.c
+++ b/target/tilegx/cpu.c
@@ -93,8 +93,6 @@ static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp)
     }
 
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     tcc->parent_realize(dev, errp);
 }
 
diff --git a/target/tricore/cpu.c b/target/tricore/cpu.c
index 89a14f81d7..ac57239f87 100644
--- a/target/tricore/cpu.c
+++ b/target/tricore/cpu.c
@@ -93,8 +93,6 @@ static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
         set_feature(env, TRICORE_FEATURE_13);
     }
     cpu_reset(cs);
-    qemu_init_vcpu(cs);
-
     tcc->parent_realize(dev, errp);
 }
 
diff --git a/target/unicore32/cpu.c b/target/unicore32/cpu.c
index a57d315d2f..007564bf59 100644
--- a/target/unicore32/cpu.c
+++ b/target/unicore32/cpu.c
@@ -84,18 +84,14 @@ static void uc32_any_cpu_initfn(Object *obj)
 
 static void uc32_cpu_realizefn(DeviceState *dev, Error **errp)
 {
-    CPUState *cs = CPU(dev);
     UniCore32CPUClass *ucc = UNICORE32_CPU_GET_CLASS(dev);
     Error *local_err = NULL;
 
-    cpu_exec_realizefn(cs, &local_err);
+    cpu_exec_realizefn(CPU(dev), &local_err);
     if (local_err != NULL) {
         error_propagate(errp, local_err);
         return;
     }
-
-    qemu_init_vcpu(cs);
-
     ucc->parent_realize(dev, errp);
 }
 
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index b6f13ceb32..94f02cc659 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -153,8 +153,6 @@ static void xtensa_cpu_realizefn(DeviceState *dev, Error **errp)
 
     cs->gdb_num_regs = xcc->config->gdb_regmap.num_regs;
 
-    qemu_init_vcpu(cs);
-
     xcc->parent_realize(dev, errp);
 }
 
-- 
2.26.2