cpu: Use DeviceClass reset instead of a special CPUClass reset

The CPUClass has a 'reset' method.  This is a legacy from when
TYPE_CPU used not to inherit from TYPE_DEVICE.  We don't need it any
more, as we can simply use the TYPE_DEVICE reset.  The 'cpu_reset()'
function is kept as the API which most places use to reset a CPU; it
is now a wrapper which calls device_cold_reset() and then the
tracepoint function.

This change should not cause CPU objects to be reset more often
than they are at the moment, because:
 * nobody is directly calling device_cold_reset() or
   qdev_reset_all() on CPU objects
 * no CPU object is on a qbus, so they will not be reset either
   by somebody calling qbus_reset_all()/bus_cold_reset(), or
   by the main "reset sysbus and everything in the qbus tree"
   reset that most devices are reset by

Note that this does not change the need for each machine or whatever
to use qemu_register_reset() to arrange to call cpu_reset() -- that
is necessary because CPU objects are not on any qbus, so they don't
get reset when the qbus tree rooted at the sysbus bus is reset, and
this isn't being changed here.

All the changes to the files under target/ were made using the
included Coccinelle script, except:

(1) the deletion of the now-inaccurate and not terribly useful
"CPUClass::reset" comments was done with a perl one-liner afterwards:
  perl -n -i -e '/ CPUClass::reset/ or print' target/*/*.c

(2) this bit of the s390 change was done by hand, because the
Coccinelle script is not sophisticated enough to handle the
parent_reset call being inside another function:

| @@ -96,8 +96,9 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
|     S390CPU *cpu = S390_CPU(s);
|     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
|     CPUS390XState *env = &cpu->env;
|+    DeviceState *dev = DEVICE(s);
|
|-    scc->parent_reset(s);
|+    scc->parent_reset(dev);
|     cpu->env.sigp_order = 0;
|     s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200303100511.5498-1-peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

41 files changed, 144 insertions, 108 deletions

diff --git a/hw/core/cpu.c b/hw/core/cpu.c
index fe65ca62ac..b889878f3c 100644
--- a/hw/core/cpu.c
+++ b/hw/core/cpu.c
@@ -239,27 +239,16 @@ void cpu_dump_statistics(CPUState *cpu, int flags)
     }
 }
 
-void cpu_class_set_parent_reset(CPUClass *cc,
-                                void (*child_reset)(CPUState *cpu),
-                                void (**parent_reset)(CPUState *cpu))
-{
-    *parent_reset = cc->reset;
-    cc->reset = child_reset;
-}
-
 void cpu_reset(CPUState *cpu)
 {
-    CPUClass *klass = CPU_GET_CLASS(cpu);
-
-    if (klass->reset != NULL) {
-        (*klass->reset)(cpu);
-    }
+    device_cold_reset(DEVICE(cpu));
 
     trace_guest_cpu_reset(cpu);
 }
 
-static void cpu_common_reset(CPUState *cpu)
+static void cpu_common_reset(DeviceState *dev)
 {
+    CPUState *cpu = CPU(dev);
     CPUClass *cc = CPU_GET_CLASS(cpu);
 
     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
@@ -419,7 +408,6 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     CPUClass *k = CPU_CLASS(klass);
 
     k->parse_features = cpu_common_parse_features;
-    k->reset = cpu_common_reset;
     k->get_arch_id = cpu_common_get_arch_id;
     k->has_work = cpu_common_has_work;
     k->get_paging_enabled = cpu_common_get_paging_enabled;
@@ -440,6 +428,7 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     set_bit(DEVICE_CATEGORY_CPU, dc->categories);
     dc->realize = cpu_common_realizefn;
     dc->unrealize = cpu_common_unrealizefn;
+    dc->reset = cpu_common_reset;
     device_class_set_props(dc, cpu_common_props);
     /*
      * Reason: CPUs still need special care by board code: wiring up
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 73e9a869a4..88ee543722 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -79,7 +79,6 @@ struct TranslationBlock;
  * @class_by_name: Callback to map -cpu command line model name to an
  * instantiatable CPU type.
  * @parse_features: Callback to parse command line arguments.
- * @reset: Callback to reset the #CPUState to its initial state.
  * @reset_dump_flags: #CPUDumpFlags to use for reset logging.
  * @has_work: Callback for checking if there is work to do.
  * @do_interrupt: Callback for interrupt handling.
@@ -165,7 +164,6 @@ typedef struct CPUClass {
     ObjectClass *(*class_by_name)(const char *cpu_model);
     void (*parse_features)(const char *typename, char *str, Error **errp);
 
-    void (*reset)(CPUState *cpu);
     int reset_dump_flags;
     bool (*has_work)(CPUState *cpu);
     void (*do_interrupt)(CPUState *cpu);
@@ -1135,10 +1133,6 @@ void cpu_exec_unrealizefn(CPUState *cpu);
  */
 bool target_words_bigendian(void);
 
-void cpu_class_set_parent_reset(CPUClass *cc,
-                                void (*child_reset)(CPUState *cpu),
-                                void (**parent_reset)(CPUState *cpu));
-
 #ifdef NEED_CPU_H
 
 #ifdef CONFIG_SOFTMMU
diff --git a/scripts/coccinelle/cpu-reset.cocci b/scripts/coccinelle/cpu-reset.cocci
new file mode 100644
index 0000000000..396a724e51
--- /dev/null
+++ b/scripts/coccinelle/cpu-reset.cocci
@@ -0,0 +1,47 @@
+// Convert targets using the old CPUState reset to DeviceState reset
+//
+// Copyright Linaro Ltd 2020
+// This work is licensed under the terms of the GNU GPLv2 or later.
+//
+// spatch --macro-file scripts/cocci-macro-file.h \
+//        --sp-file scripts/coccinelle/cpu-reset.cocci \
+//        --keep-comments --smpl-spacing --in-place --include-headers --dir target
+//
+// For simplicity we assume some things about the code we're modifying
+// that happen to be true for all our targets:
+//  * all cpu_class_set_parent_reset() callsites have a 'DeviceClass *dc' local
+//  * the parent reset field in the target CPU class is 'parent_reset'
+//  * no reset function already has a 'dev' local
+
+@@
+identifier cpu, x;
+typedef CPUState;
+@@
+struct x {
+...
+- void (*parent_reset)(CPUState *cpu);
++ DeviceReset parent_reset;
+...
+};
+@ rule1 @
+identifier resetfn;
+expression resetfield;
+identifier cc;
+@@
+- cpu_class_set_parent_reset(cc, resetfn, resetfield)
++ device_class_set_parent_reset(dc, resetfn, resetfield)
+@@
+identifier rule1.resetfn;
+identifier cpu, cc;
+typedef CPUState, DeviceState;
+@@
+-resetfn(CPUState *cpu)
+-{
++resetfn(DeviceState *dev)
++{
++    CPUState *cpu = CPU(dev);
+<...
+-    cc->parent_reset(cpu);
++    cc->parent_reset(dev);
+...>
+}
diff --git a/target/alpha/cpu-qom.h b/target/alpha/cpu-qom.h
index 6f0a0adb9e..08832fa767 100644
--- a/target/alpha/cpu-qom.h
+++ b/target/alpha/cpu-qom.h
@@ -44,7 +44,7 @@ typedef struct AlphaCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } AlphaCPUClass;
 
 typedef struct AlphaCPU AlphaCPU;
diff --git a/target/arm/cpu-qom.h b/target/arm/cpu-qom.h
index 3a9d31ea9d..d95568bf05 100644
--- a/target/arm/cpu-qom.h
+++ b/target/arm/cpu-qom.h
@@ -51,7 +51,7 @@ typedef struct ARMCPUClass {
 
     const ARMCPUInfo *info;
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } ARMCPUClass;
 
 typedef struct ARMCPU ARMCPU;
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 7fe367078c..8e5ba619a0 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -155,14 +155,14 @@ static void cp_reg_check_reset(gpointer key, gpointer value,  gpointer opaque)
     assert(oldvalue == newvalue);
 }
 
-/* CPUClass::reset() */
-static void arm_cpu_reset(CPUState *s)
+static void arm_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     ARMCPU *cpu = ARM_CPU(s);
     ARMCPUClass *acc = ARM_CPU_GET_CLASS(cpu);
     CPUARMState *env = &cpu->env;
 
-    acc->parent_reset(s);
+    acc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUARMState, end_reset_fields));
 
@@ -2785,7 +2785,7 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
                                     &acc->parent_realize);
 
     device_class_set_props(dc, arm_cpu_properties);
-    cpu_class_set_parent_reset(cc, arm_cpu_reset, &acc->parent_reset);
+    device_class_set_parent_reset(dc, arm_cpu_reset, &acc->parent_reset);
 
     cc->class_by_name = arm_cpu_class_by_name;
     cc->has_work = arm_cpu_has_work;
diff --git a/target/cris/cpu-qom.h b/target/cris/cpu-qom.h
index 308c1f95bd..f1de6041dc 100644
--- a/target/cris/cpu-qom.h
+++ b/target/cris/cpu-qom.h
@@ -45,7 +45,7 @@ typedef struct CRISCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 
     uint32_t vr;
 } CRISCPUClass;
diff --git a/target/cris/cpu.c b/target/cris/cpu.c
index 17c6712e29..cff6b9eabf 100644
--- a/target/cris/cpu.c
+++ b/target/cris/cpu.c
@@ -40,15 +40,15 @@ static bool cris_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
 }
 
-/* CPUClass::reset() */
-static void cris_cpu_reset(CPUState *s)
+static void cris_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     CRISCPU *cpu = CRIS_CPU(s);
     CRISCPUClass *ccc = CRIS_CPU_GET_CLASS(cpu);
     CPUCRISState *env = &cpu->env;
     uint32_t vr;
 
-    ccc->parent_reset(s);
+    ccc->parent_reset(dev);
 
     vr = env->pregs[PR_VR];
     memset(env, 0, offsetof(CPUCRISState, end_reset_fields));
@@ -264,7 +264,7 @@ static void cris_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_realize(dc, cris_cpu_realizefn,
                                     &ccc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, cris_cpu_reset, &ccc->parent_reset);
+    device_class_set_parent_reset(dc, cris_cpu_reset, &ccc->parent_reset);
 
     cc->class_by_name = cris_cpu_class_by_name;
     cc->has_work = cris_cpu_has_work;
diff --git a/target/hppa/cpu-qom.h b/target/hppa/cpu-qom.h
index 6367dc4793..b1f6045495 100644
--- a/target/hppa/cpu-qom.h
+++ b/target/hppa/cpu-qom.h
@@ -44,7 +44,7 @@ typedef struct HPPACPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } HPPACPUClass;
 
 typedef struct HPPACPU HPPACPU;
diff --git a/target/i386/cpu-qom.h b/target/i386/cpu-qom.h
index 0efab2fc67..3e96f8d668 100644
--- a/target/i386/cpu-qom.h
+++ b/target/i386/cpu-qom.h
@@ -71,7 +71,7 @@ typedef struct X86CPUClass {
 
     DeviceRealize parent_realize;
     DeviceUnrealize parent_unrealize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } X86CPUClass;
 
 typedef struct X86CPU X86CPU;
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 350b51b346..fb3f3c54bb 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5983,9 +5983,9 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
     }
 }
 
-/* CPUClass::reset() */
-static void x86_cpu_reset(CPUState *s)
+static void x86_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     X86CPU *cpu = X86_CPU(s);
     X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu);
     CPUX86State *env = &cpu->env;
@@ -5993,7 +5993,7 @@ static void x86_cpu_reset(CPUState *s)
     uint64_t xcr0;
     int i;
 
-    xcc->parent_reset(s);
+    xcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUX86State, end_reset_fields));
 
@@ -7297,7 +7297,7 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
                                       &xcc->parent_unrealize);
     device_class_set_props(dc, x86_cpu_properties);
 
-    cpu_class_set_parent_reset(cc, x86_cpu_reset, &xcc->parent_reset);
+    device_class_set_parent_reset(dc, x86_cpu_reset, &xcc->parent_reset);
     cc->reset_dump_flags = CPU_DUMP_FPU | CPU_DUMP_CCOP;
 
     cc->class_by_name = x86_cpu_class_by_name;
diff --git a/target/lm32/cpu-qom.h b/target/lm32/cpu-qom.h
index dc9ac9ac9f..bdedb3759a 100644
--- a/target/lm32/cpu-qom.h
+++ b/target/lm32/cpu-qom.h
@@ -44,7 +44,7 @@ typedef struct LM32CPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } LM32CPUClass;
 
 typedef struct LM32CPU LM32CPU;
diff --git a/target/lm32/cpu.c b/target/lm32/cpu.c
index 687bf35e65..c50ad5fa15 100644
--- a/target/lm32/cpu.c
+++ b/target/lm32/cpu.c
@@ -99,14 +99,14 @@ static bool lm32_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 }
 
-/* CPUClass::reset() */
-static void lm32_cpu_reset(CPUState *s)
+static void lm32_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     LM32CPU *cpu = LM32_CPU(s);
     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
     CPULM32State *env = &cpu->env;
 
-    lcc->parent_reset(s);
+    lcc->parent_reset(dev);
 
     /* reset cpu state */
     memset(env, 0, offsetof(CPULM32State, end_reset_fields));
@@ -218,7 +218,7 @@ static void lm32_cpu_class_init(ObjectClass *oc, void *data)
 
     device_class_set_parent_realize(dc, lm32_cpu_realizefn,
                                     &lcc->parent_realize);
-    cpu_class_set_parent_reset(cc, lm32_cpu_reset, &lcc->parent_reset);
+    device_class_set_parent_reset(dc, lm32_cpu_reset, &lcc->parent_reset);
 
     cc->class_by_name = lm32_cpu_class_by_name;
     cc->has_work = lm32_cpu_has_work;
diff --git a/target/m68k/cpu-qom.h b/target/m68k/cpu-qom.h
index b56da8a213..88b11b60f1 100644
--- a/target/m68k/cpu-qom.h
+++ b/target/m68k/cpu-qom.h
@@ -44,7 +44,7 @@ typedef struct M68kCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } M68kCPUClass;
 
 typedef struct M68kCPU M68kCPU;
diff --git a/target/m68k/cpu.c b/target/m68k/cpu.c
index f0653cda2f..9445fcd6df 100644
--- a/target/m68k/cpu.c
+++ b/target/m68k/cpu.c
@@ -41,16 +41,16 @@ static void m68k_set_feature(CPUM68KState *env, int feature)
     env->features |= (1u << feature);
 }
 
-/* CPUClass::reset() */
-static void m68k_cpu_reset(CPUState *s)
+static void m68k_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     M68kCPU *cpu = M68K_CPU(s);
     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
     CPUM68KState *env = &cpu->env;
     floatx80 nan = floatx80_default_nan(NULL);
     int i;
 
-    mcc->parent_reset(s);
+    mcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
 #ifdef CONFIG_SOFTMMU
@@ -273,7 +273,7 @@ static void m68k_cpu_class_init(ObjectClass *c, void *data)
 
     device_class_set_parent_realize(dc, m68k_cpu_realizefn,
                                     &mcc->parent_realize);
-    cpu_class_set_parent_reset(cc, m68k_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, m68k_cpu_reset, &mcc->parent_reset);
 
     cc->class_by_name = m68k_cpu_class_by_name;
     cc->has_work = m68k_cpu_has_work;
diff --git a/target/microblaze/cpu-qom.h b/target/microblaze/cpu-qom.h
index 49b07cc697..053ba44ee8 100644
--- a/target/microblaze/cpu-qom.h
+++ b/target/microblaze/cpu-qom.h
@@ -44,7 +44,7 @@ typedef struct MicroBlazeCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } MicroBlazeCPUClass;
 
 typedef struct MicroBlazeCPU MicroBlazeCPU;
diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index 8c90110e52..a2c2f271df 100644
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -102,14 +102,14 @@ static void microblaze_cpu_set_irq(void *opaque, int irq, int level)
 }
 #endif
 
-/* CPUClass::reset() */
-static void mb_cpu_reset(CPUState *s)
+static void mb_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(s);
     MicroBlazeCPUClass *mcc = MICROBLAZE_CPU_GET_CLASS(cpu);
     CPUMBState *env = &cpu->env;
 
-    mcc->parent_reset(s);
+    mcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUMBState, end_reset_fields));
     env->res_addr = RES_ADDR_NONE;
@@ -292,7 +292,7 @@ static void mb_cpu_class_init(ObjectClass *oc, void *data)
 
     device_class_set_parent_realize(dc, mb_cpu_realizefn,
                                     &mcc->parent_realize);
-    cpu_class_set_parent_reset(cc, mb_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, mb_cpu_reset, &mcc->parent_reset);
 
     cc->class_by_name = mb_cpu_class_by_name;
     cc->has_work = mb_cpu_has_work;
diff --git a/target/mips/cpu-qom.h b/target/mips/cpu-qom.h
index a430c0fe4b..9d0df6c034 100644
--- a/target/mips/cpu-qom.h
+++ b/target/mips/cpu-qom.h
@@ -48,7 +48,7 @@ typedef struct MIPSCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
     const struct mips_def_t *cpu_def;
 } MIPSCPUClass;
 
diff --git a/target/mips/cpu.c b/target/mips/cpu.c
index 6cd6b9650b..e86cd06548 100644
--- a/target/mips/cpu.c
+++ b/target/mips/cpu.c
@@ -96,14 +96,14 @@ static bool mips_cpu_has_work(CPUState *cs)
     return has_work;
 }
 
-/* CPUClass::reset() */
-static void mips_cpu_reset(CPUState *s)
+static void mips_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     MIPSCPU *cpu = MIPS_CPU(s);
     MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu);
     CPUMIPSState *env = &cpu->env;
 
-    mcc->parent_reset(s);
+    mcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUMIPSState, end_reset_fields));
 
@@ -189,7 +189,7 @@ static void mips_cpu_class_init(ObjectClass *c, void *data)
 
     device_class_set_parent_realize(dc, mips_cpu_realizefn,
                                     &mcc->parent_realize);
-    cpu_class_set_parent_reset(cc, mips_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, mips_cpu_reset, &mcc->parent_reset);
 
     cc->class_by_name = mips_cpu_class_by_name;
     cc->has_work = mips_cpu_has_work;
diff --git a/target/moxie/cpu.c b/target/moxie/cpu.c
index cf47bc709b..6e0443ccb7 100644
--- a/target/moxie/cpu.c
+++ b/target/moxie/cpu.c
@@ -35,13 +35,14 @@ static bool moxie_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 }
 
-static void moxie_cpu_reset(CPUState *s)
+static void moxie_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     MoxieCPU *cpu = MOXIE_CPU(s);
     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
     CPUMoxieState *env = &cpu->env;
 
-    mcc->parent_reset(s);
+    mcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUMoxieState, end_reset_fields));
     env->pc = 0x1000;
@@ -101,7 +102,7 @@ static void moxie_cpu_class_init(ObjectClass *oc, void *data)
 
     device_class_set_parent_realize(dc, moxie_cpu_realizefn,
                                     &mcc->parent_realize);
-    cpu_class_set_parent_reset(cc, moxie_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, moxie_cpu_reset, &mcc->parent_reset);
 
     cc->class_by_name = moxie_cpu_class_by_name;
 
diff --git a/target/moxie/cpu.h b/target/moxie/cpu.h
index 01dca548e5..455553b794 100644
--- a/target/moxie/cpu.h
+++ b/target/moxie/cpu.h
@@ -69,7 +69,7 @@ typedef struct MoxieCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } MoxieCPUClass;
 
 /**
diff --git a/target/nios2/cpu.c b/target/nios2/cpu.c
index 1c0c855a6f..0a4075949e 100644
--- a/target/nios2/cpu.c
+++ b/target/nios2/cpu.c
@@ -39,9 +39,9 @@ static bool nios2_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI);
 }
 
-/* CPUClass::reset() */
-static void nios2_cpu_reset(CPUState *cs)
+static void nios2_cpu_reset(DeviceState *dev)
 {
+    CPUState *cs = CPU(dev);
     Nios2CPU *cpu = NIOS2_CPU(cs);
     Nios2CPUClass *ncc = NIOS2_CPU_GET_CLASS(cpu);
     CPUNios2State *env = &cpu->env;
@@ -51,7 +51,7 @@ static void nios2_cpu_reset(CPUState *cs)
         log_cpu_state(cs, 0);
     }
 
-    ncc->parent_reset(cs);
+    ncc->parent_reset(dev);
 
     memset(env->regs, 0, sizeof(uint32_t) * NUM_CORE_REGS);
     env->regs[R_PC] = cpu->reset_addr;
@@ -188,7 +188,7 @@ static void nios2_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_realize(dc, nios2_cpu_realizefn,
                                     &ncc->parent_realize);
     device_class_set_props(dc, nios2_properties);
-    cpu_class_set_parent_reset(cc, nios2_cpu_reset, &ncc->parent_reset);
+    device_class_set_parent_reset(dc, nios2_cpu_reset, &ncc->parent_reset);
 
     cc->class_by_name = nios2_cpu_class_by_name;
     cc->has_work = nios2_cpu_has_work;
diff --git a/target/nios2/cpu.h b/target/nios2/cpu.h
index 78f633f970..4dddf9c3a1 100644
--- a/target/nios2/cpu.h
+++ b/target/nios2/cpu.h
@@ -50,7 +50,7 @@ typedef struct Nios2CPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } Nios2CPUClass;
 
 #define TARGET_HAS_ICE 1
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index 5cd04dafab..5528c0918f 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -41,13 +41,13 @@ static void openrisc_disas_set_info(CPUState *cpu, disassemble_info *info)
     info->print_insn = print_insn_or1k;
 }
 
-/* CPUClass::reset() */
-static void openrisc_cpu_reset(CPUState *s)
+static void openrisc_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     OpenRISCCPU *cpu = OPENRISC_CPU(s);
     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
 
-    occ->parent_reset(s);
+    occ->parent_reset(dev);
 
     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, end_reset_fields));
 
@@ -150,7 +150,7 @@ static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
 
     device_class_set_parent_realize(dc, openrisc_cpu_realizefn,
                                     &occ->parent_realize);
-    cpu_class_set_parent_reset(cc, openrisc_cpu_reset, &occ->parent_reset);
+    device_class_set_parent_reset(dc, openrisc_cpu_reset, &occ->parent_reset);
 
     cc->class_by_name = openrisc_cpu_class_by_name;
     cc->has_work = openrisc_cpu_has_work;
diff --git a/target/openrisc/cpu.h b/target/openrisc/cpu.h
index 0ad02eab79..e7fb06445e 100644
--- a/target/openrisc/cpu.h
+++ b/target/openrisc/cpu.h
@@ -48,7 +48,7 @@ typedef struct OpenRISCCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } OpenRISCCPUClass;
 
 #define TARGET_INSN_START_EXTRA_WORDS 1
diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
index e499575dc8..b528131761 100644
--- a/target/ppc/cpu-qom.h
+++ b/target/ppc/cpu-qom.h
@@ -166,7 +166,7 @@ typedef struct PowerPCCPUClass {
 
     DeviceRealize parent_realize;
     DeviceUnrealize parent_unrealize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
     void (*parent_parse_features)(const char *type, char *str, Error **errp);
 
     uint32_t pvr;
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index 53995f62ea..7e9780e875 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -10669,16 +10669,16 @@ static bool ppc_cpu_has_work(CPUState *cs)
     return msr_ee && (cs->interrupt_request & CPU_INTERRUPT_HARD);
 }
 
-/* CPUClass::reset() */
-static void ppc_cpu_reset(CPUState *s)
+static void ppc_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     PowerPCCPU *cpu = POWERPC_CPU(s);
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
     CPUPPCState *env = &cpu->env;
     target_ulong msr;
     int i;
 
-    pcc->parent_reset(s);
+    pcc->parent_reset(dev);
 
     msr = (target_ulong)0;
     msr |= (target_ulong)MSR_HVB;
@@ -10885,7 +10885,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data)
     pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_always;
     device_class_set_props(dc, ppc_cpu_properties);
 
-    cpu_class_set_parent_reset(cc, ppc_cpu_reset, &pcc->parent_reset);
+    device_class_set_parent_reset(dc, ppc_cpu_reset, &pcc->parent_reset);
 
     cc->class_by_name = ppc_cpu_class_by_name;
     pcc->parent_parse_features = cc->parse_features;
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index c0b7023100..4e578239d3 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -330,13 +330,14 @@ void restore_state_to_opc(CPURISCVState *env, TranslationBlock *tb,
     env->pc = data[0];
 }
 
-static void riscv_cpu_reset(CPUState *cs)
+static void riscv_cpu_reset(DeviceState *dev)
 {
+    CPUState *cs = CPU(dev);
     RISCVCPU *cpu = RISCV_CPU(cs);
     RISCVCPUClass *mcc = RISCV_CPU_GET_CLASS(cpu);
     CPURISCVState *env = &cpu->env;
 
-    mcc->parent_reset(cs);
+    mcc->parent_reset(dev);
 #ifndef CONFIG_USER_ONLY
     env->priv = PRV_M;
     env->mstatus &= ~(MSTATUS_MIE | MSTATUS_MPRV);
@@ -511,7 +512,7 @@ static void riscv_cpu_class_init(ObjectClass *c, void *data)
     device_class_set_parent_realize(dc, riscv_cpu_realize,
                                     &mcc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, riscv_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, riscv_cpu_reset, &mcc->parent_reset);
 
     cc->class_by_name = riscv_cpu_class_by_name;
     cc->has_work = riscv_cpu_has_work;
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 3dcdf92227..078fc83959 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -234,7 +234,7 @@ typedef struct RISCVCPUClass {
     CPUClass parent_class;
     /*< public >*/
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } RISCVCPUClass;
 
 /**
diff --git a/target/s390x/cpu-qom.h b/target/s390x/cpu-qom.h
index dbe5346ec9..1630818c28 100644
--- a/target/s390x/cpu-qom.h
+++ b/target/s390x/cpu-qom.h
@@ -61,7 +61,7 @@ typedef struct S390CPUClass {
     const char *desc;
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
     void (*load_normal)(CPUState *cpu);
     void (*reset)(CPUState *cpu, cpu_reset_type type);
 } S390CPUClass;
diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index 3dd396e870..427a46e3e1 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -96,8 +96,9 @@ static void s390_cpu_reset(CPUState *s, cpu_reset_type type)
     S390CPU *cpu = S390_CPU(s);
     S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
     CPUS390XState *env = &cpu->env;
+    DeviceState *dev = DEVICE(s);
 
-    scc->parent_reset(s);
+    scc->parent_reset(dev);
     cpu->env.sigp_order = 0;
     s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu);
 
@@ -450,8 +451,9 @@ static Property s390x_cpu_properties[] = {
     DEFINE_PROP_END_OF_LIST()
 };
 
-static void s390_cpu_reset_full(CPUState *s)
+static void s390_cpu_reset_full(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     return s390_cpu_reset(s, S390_CPU_RESET_CLEAR);
 }
 
@@ -466,7 +468,7 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_props(dc, s390x_cpu_properties);
     dc->user_creatable = true;
 
-    cpu_class_set_parent_reset(cc, s390_cpu_reset_full, &scc->parent_reset);
+    device_class_set_parent_reset(dc, s390_cpu_reset_full, &scc->parent_reset);
 #if !defined(CONFIG_USER_ONLY)
     scc->load_normal = s390_cpu_load_normal;
 #endif
diff --git a/target/sh4/cpu-qom.h b/target/sh4/cpu-qom.h
index 0c56d055ba..72a63f3fd3 100644
--- a/target/sh4/cpu-qom.h
+++ b/target/sh4/cpu-qom.h
@@ -51,7 +51,7 @@ typedef struct SuperHCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 
     uint32_t pvr;
     uint32_t prr;
diff --git a/target/sh4/cpu.c b/target/sh4/cpu.c
index 70c8d8170f..3c68021c56 100644
--- a/target/sh4/cpu.c
+++ b/target/sh4/cpu.c
@@ -47,14 +47,14 @@ static bool superh_cpu_has_work(CPUState *cs)
     return cs->interrupt_request & CPU_INTERRUPT_HARD;
 }
 
-/* CPUClass::reset() */
-static void superh_cpu_reset(CPUState *s)
+static void superh_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     SuperHCPU *cpu = SUPERH_CPU(s);
     SuperHCPUClass *scc = SUPERH_CPU_GET_CLASS(cpu);
     CPUSH4State *env = &cpu->env;
 
-    scc->parent_reset(s);
+    scc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUSH4State, end_reset_fields));
 
@@ -214,7 +214,7 @@ static void superh_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_realize(dc, superh_cpu_realizefn,
                                     &scc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, superh_cpu_reset, &scc->parent_reset);
+    device_class_set_parent_reset(dc, superh_cpu_reset, &scc->parent_reset);
 
     cc->class_by_name = superh_cpu_class_by_name;
     cc->has_work = superh_cpu_has_work;
diff --git a/target/sparc/cpu-qom.h b/target/sparc/cpu-qom.h
index 7442e2768e..8b4d33c21e 100644
--- a/target/sparc/cpu-qom.h
+++ b/target/sparc/cpu-qom.h
@@ -49,7 +49,7 @@ typedef struct SPARCCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
     sparc_def_t *cpu_def;
 } SPARCCPUClass;
 
diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index eeaecbd8d6..3f05aba9d6 100644
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -28,14 +28,14 @@
 
 //#define DEBUG_FEATURES
 
-/* CPUClass::reset() */
-static void sparc_cpu_reset(CPUState *s)
+static void sparc_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     SPARCCPU *cpu = SPARC_CPU(s);
     SPARCCPUClass *scc = SPARC_CPU_GET_CLASS(cpu);
     CPUSPARCState *env = &cpu->env;
 
-    scc->parent_reset(s);
+    scc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUSPARCState, end_reset_fields));
     env->cwp = 0;
@@ -859,7 +859,7 @@ static void sparc_cpu_class_init(ObjectClass *oc, void *data)
                                     &scc->parent_realize);
     device_class_set_props(dc, sparc_cpu_properties);
 
-    cpu_class_set_parent_reset(cc, sparc_cpu_reset, &scc->parent_reset);
+    device_class_set_parent_reset(dc, sparc_cpu_reset, &scc->parent_reset);
 
     cc->class_by_name = sparc_cpu_class_by_name;
     cc->parse_features = sparc_cpu_parse_features;
diff --git a/target/tilegx/cpu.c b/target/tilegx/cpu.c
index cd422a0467..1fee87c094 100644
--- a/target/tilegx/cpu.c
+++ b/target/tilegx/cpu.c
@@ -68,13 +68,14 @@ static bool tilegx_cpu_has_work(CPUState *cs)
     return true;
 }
 
-static void tilegx_cpu_reset(CPUState *s)
+static void tilegx_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     TileGXCPU *cpu = TILEGX_CPU(s);
     TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu);
     CPUTLGState *env = &cpu->env;
 
-    tcc->parent_reset(s);
+    tcc->parent_reset(dev);
 
     memset(env, 0, offsetof(CPUTLGState, end_reset_fields));
 }
@@ -142,7 +143,7 @@ static void tilegx_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_realize(dc, tilegx_cpu_realizefn,
                                     &tcc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, tilegx_cpu_reset, &tcc->parent_reset);
+    device_class_set_parent_reset(dc, tilegx_cpu_reset, &tcc->parent_reset);
 
     cc->class_by_name = tilegx_cpu_class_by_name;
     cc->has_work = tilegx_cpu_has_work;
diff --git a/target/tilegx/cpu.h b/target/tilegx/cpu.h
index 9cbec247d2..193b6bbccb 100644
--- a/target/tilegx/cpu.h
+++ b/target/tilegx/cpu.h
@@ -118,7 +118,7 @@ typedef struct TileGXCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } TileGXCPUClass;
 
 /**
diff --git a/target/tricore/cpu-qom.h b/target/tricore/cpu-qom.h
index 7c1e130b4e..cd819e6f24 100644
--- a/target/tricore/cpu-qom.h
+++ b/target/tricore/cpu-qom.h
@@ -36,7 +36,7 @@ typedef struct TriCoreCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 } TriCoreCPUClass;
 
 typedef struct TriCoreCPU TriCoreCPU;
diff --git a/target/tricore/cpu.c b/target/tricore/cpu.c
index 85bc9f03a1..743b404a95 100644
--- a/target/tricore/cpu.c
+++ b/target/tricore/cpu.c
@@ -53,13 +53,14 @@ static void tricore_cpu_synchronize_from_tb(CPUState *cs,
     env->PC = tb->pc;
 }
 
-static void tricore_cpu_reset(CPUState *s)
+static void tricore_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     TriCoreCPU *cpu = TRICORE_CPU(s);
     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
     CPUTriCoreState *env = &cpu->env;
 
-    tcc->parent_reset(s);
+    tcc->parent_reset(dev);
 
     cpu_state_reset(env);
 }
@@ -153,7 +154,7 @@ static void tricore_cpu_class_init(ObjectClass *c, void *data)
     device_class_set_parent_realize(dc, tricore_cpu_realizefn,
                                     &mcc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, tricore_cpu_reset, &mcc->parent_reset);
+    device_class_set_parent_reset(dc, tricore_cpu_reset, &mcc->parent_reset);
     cc->class_by_name = tricore_cpu_class_by_name;
     cc->has_work = tricore_cpu_has_work;
 
diff --git a/target/xtensa/cpu-qom.h b/target/xtensa/cpu-qom.h
index 9ac54241bd..3ea93ce1f9 100644
--- a/target/xtensa/cpu-qom.h
+++ b/target/xtensa/cpu-qom.h
@@ -56,7 +56,7 @@ typedef struct XtensaCPUClass {
     /*< public >*/
 
     DeviceRealize parent_realize;
-    void (*parent_reset)(CPUState *cpu);
+    DeviceReset parent_reset;
 
     const XtensaConfig *config;
 } XtensaCPUClass;
diff --git a/target/xtensa/cpu.c b/target/xtensa/cpu.c
index 4856aee8ec..82c2ee0679 100644
--- a/target/xtensa/cpu.c
+++ b/target/xtensa/cpu.c
@@ -67,14 +67,14 @@ bool xtensa_abi_call0(void)
 }
 #endif
 
-/* CPUClass::reset() */
-static void xtensa_cpu_reset(CPUState *s)
+static void xtensa_cpu_reset(DeviceState *dev)
 {
+    CPUState *s = CPU(dev);
     XtensaCPU *cpu = XTENSA_CPU(s);
     XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(cpu);
     CPUXtensaState *env = &cpu->env;
 
-    xcc->parent_reset(s);
+    xcc->parent_reset(dev);
 
     env->exception_taken = 0;
     env->pc = env->config->exception_vector[EXC_RESET0 + env->static_vectors];
@@ -184,7 +184,7 @@ static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_realize(dc, xtensa_cpu_realizefn,
                                     &xcc->parent_realize);
 
-    cpu_class_set_parent_reset(cc, xtensa_cpu_reset, &xcc->parent_reset);
+    device_class_set_parent_reset(dc, xtensa_cpu_reset, &xcc->parent_reset);
 
     cc->class_by_name = xtensa_cpu_class_by_name;
     cc->has_work = xtensa_cpu_has_work;