[Qemu-devel] [RFC 01/12] target-s390x: QOM'ify CPU

["Andreas Färber" <afaerber@suse.de>]

S/390 ignored -cpu, so there's only one S390CPUClass for now.
Let cpu_s390x_init() instantiate it.

Embed CPUS390XState into S390CPU. Keep s390x_{tod,cpu}_timer() in
helper.c but pass the S390CPU to them. Let cpu_state_reset() call
cpu_reset().

Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Ulrich Hecht <uli@suse.de>
---
 Makefile.target        |    1 +
 target-s390x/cpu-qom.h |   71 +++++++++++++++++++++++++++++++++++
 target-s390x/cpu.c     |   96 ++++++++++++++++++++++++++++++++++++++++++++++++
 target-s390x/cpu.h     |    5 ++
 target-s390x/helper.c  |   42 ++++++---------------
 5 files changed, 185 insertions(+), 30 deletions(-)
 create mode 100644 target-s390x/cpu-qom.h
 create mode 100644 target-s390x/cpu.c

diff --git a/Makefile.target b/Makefile.target
index c48a849..737c1e5 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -88,6 +88,7 @@ libobj-$(TARGET_SPARC64) += vis_helper.o
 libobj-$(CONFIG_NEED_MMU) += mmu.o
 libobj-$(TARGET_ARM) += neon_helper.o iwmmxt_helper.o
 libobj-$(TARGET_ARM) += cpu.o
+libobj-$(TARGET_S390X) += cpu.o
 libobj-$(TARGET_SH4) += cpu.o
 ifeq ($(TARGET_BASE_ARCH), sparc)
 libobj-y += fop_helper.o cc_helper.o win_helper.o mmu_helper.o ldst_helper.o
diff --git a/target-s390x/cpu-qom.h b/target-s390x/cpu-qom.h
new file mode 100644
index 0000000..6482969
--- /dev/null
+++ b/target-s390x/cpu-qom.h
@@ -0,0 +1,71 @@
+/*
+ * QEMU S/390 CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/lgpl-2.1.html>
+ */
+#ifndef QEMU_S390_CPU_QOM_H
+#define QEMU_S390_CPU_QOM_H
+
+#include "qemu/cpu.h"
+#include "cpu.h"
+
+#define TYPE_S390_CPU "s390-cpu"
+
+#define S390_CPU_CLASS(klass) \
+    OBJECT_CLASS_CHECK(S390CPUClass, (klass), TYPE_S390_CPU)
+#define S390_CPU(obj) \
+    OBJECT_CHECK(S390CPU, (obj), TYPE_S390_CPU)
+#define S390_CPU_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(S390CPUClass, (obj), TYPE_S390_CPU)
+
+/**
+ * S390CPUClass:
+ * @parent_reset: The parent class' reset handler.
+ *
+ * An S/390 CPU model.
+ */
+typedef struct S390CPUClass {
+    /*< private >*/
+    CPUClass parent_class;
+    /*< public >*/
+
+    void (*parent_reset)(CPUState *cpu);
+} S390CPUClass;
+
+/**
+ * S390CPU:
+ * @env: Legacy CPU state.
+ *
+ * An S/390 CPU.
+ */
+typedef struct S390CPU {
+    /*< private >*/
+    CPUState parent_obj;
+    /*< public >*/
+
+    CPUS390XState env;
+} S390CPU;
+
+static inline S390CPU *s390_env_get_cpu(CPUS390XState *env)
+{
+    return S390_CPU(container_of(env, S390CPU, env));
+}
+
+#define ENV_GET_CPU(e) CPU(s390_env_get_cpu(e))
+
+
+#endif
diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
new file mode 100644
index 0000000..b0d5726
--- /dev/null
+++ b/target-s390x/cpu.c
@@ -0,0 +1,96 @@
+/*
+ * QEMU S/390 CPU
+ *
+ * Copyright (c) 2009 Ulrich Hecht
+ * Copyright (c) 2011 Alexander Graf
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/lgpl-2.1.html>
+ */
+
+#include "cpu-qom.h"
+#include "qemu-common.h"
+#include "qemu-timer.h"
+
+
+static void s390_cpu_reset(CPUState *c)
+{
+    S390CPU *cpu = S390_CPU(c);
+    S390CPUClass *klass = S390_CPU_GET_CLASS(c);
+    CPUS390XState *env = &cpu->env;
+
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
+        log_cpu_state(env, 0);
+    }
+
+    klass->parent_reset(c);
+
+    memset(env, 0, offsetof(CPUS390XState, breakpoints));
+    /* FIXME: reset vector? */
+    tlb_flush(env, 1);
+    s390_add_running_cpu(env);
+}
+
+static void s390_cpu_initfn(Object *obj)
+{
+    S390CPU *cpu = S390_CPU(obj);
+    CPUS390XState *env = &cpu->env;
+#if !defined(CONFIG_USER_ONLY)
+    struct tm tm;
+#endif
+    static int cpu_num;
+
+    memset(&cpu->env, 0, sizeof(CPUS390XState));
+    cpu_exec_init(env);
+
+#if !defined(CONFIG_USER_ONLY)
+    qemu_get_timedate(&tm, 0);
+    env->tod_offset = TOD_UNIX_EPOCH +
+                      (time2tod(mktimegm(&tm)) * 1000000000ULL);
+    env->tod_basetime = 0;
+    env->tod_timer = qemu_new_timer_ns(vm_clock, s390x_tod_timer, cpu);
+    env->cpu_timer = qemu_new_timer_ns(vm_clock, s390x_cpu_timer, cpu);
+#endif
+    env->cpu_num = cpu_num++;
+    env->ext_index = -1;
+
+    cpu_reset(CPU(cpu));
+}
+
+static void s390_cpu_class_init(ObjectClass *klass, void *data)
+{
+    S390CPUClass *k = S390_CPU_CLASS(klass);
+    CPUClass *cpu_class = CPU_CLASS(klass);
+
+    k->parent_reset = cpu_class->reset;
+    cpu_class->reset = s390_cpu_reset;
+}
+
+static const TypeInfo s390_cpu_info = {
+    .name = TYPE_S390_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(S390CPU),
+    .instance_init = s390_cpu_initfn,
+    .class_size = sizeof(S390CPUClass),
+    .class_init = s390_cpu_class_init,
+};
+
+static void s390_cpu_register_types(void)
+{
+    type_register_static(&s390_cpu_info);
+}
+
+type_init(s390_cpu_register_types)
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index ea849fc..2f3f394 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -288,6 +288,9 @@ int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw
 
 
 #ifndef CONFIG_USER_ONLY
+void s390x_tod_timer(void *opaque);
+void s390x_cpu_timer(void *opaque);
+
 int s390_virtio_hypercall(CPUS390XState *env, uint64_t mem, uint64_t hypercall);
 
 #ifdef CONFIG_KVM
@@ -991,4 +994,6 @@ static inline void cpu_pc_from_tb(CPUS390XState *env, TranslationBlock* tb)
     env->psw.addr = tb->pc;
 }
 
+#include "cpu-qom.h"
+
 #endif
diff --git a/target-s390x/helper.c b/target-s390x/helper.c
index 44d5048..0068b2b 100644
--- a/target-s390x/helper.c
+++ b/target-s390x/helper.c
@@ -24,6 +24,7 @@
 #ifndef CONFIG_USER_ONLY
 #include "sysemu.h"
 #endif
+#include "cpu-qom.h"
 
 //#define DEBUG_S390
 //#define DEBUG_S390_PTE
@@ -51,17 +52,19 @@
 #endif
 
 #ifndef CONFIG_USER_ONLY
-static void s390x_tod_timer(void *opaque)
+void s390x_tod_timer(void *opaque)
 {
-    CPUS390XState *env = opaque;
+    S390CPU *cpu = opaque;
+    CPUS390XState *env = &cpu->env;
 
     env->pending_int |= INTERRUPT_TOD;
     cpu_interrupt(env, CPU_INTERRUPT_HARD);
 }
 
-static void s390x_cpu_timer(void *opaque)
+void s390x_cpu_timer(void *opaque)
 {
-    CPUS390XState *env = opaque;
+    S390CPU *cpu = opaque;
+    CPUS390XState *env = &cpu->env;
 
     env->pending_int |= INTERRUPT_CPUTIMER;
     cpu_interrupt(env, CPU_INTERRUPT_HARD);
@@ -70,32 +73,19 @@ static void s390x_cpu_timer(void *opaque)
 
 CPUS390XState *cpu_s390x_init(const char *cpu_model)
 {
+    S390CPU *cpu;
     CPUS390XState *env;
-#if !defined (CONFIG_USER_ONLY)
-    struct tm tm;
-#endif
     static int inited = 0;
-    static int cpu_num = 0;
 
-    env = g_malloc0(sizeof(CPUS390XState));
-    cpu_exec_init(env);
+    cpu = S390_CPU(object_new(TYPE_S390_CPU));
+    env = &cpu->env;
+
     if (tcg_enabled() && !inited) {
         inited = 1;
         s390x_translate_init();
     }
 
-#if !defined(CONFIG_USER_ONLY)
-    qemu_get_timedate(&tm, 0);
-    env->tod_offset = TOD_UNIX_EPOCH +
-                      (time2tod(mktimegm(&tm)) * 1000000000ULL);
-    env->tod_basetime = 0;
-    env->tod_timer = qemu_new_timer_ns(vm_clock, s390x_tod_timer, env);
-    env->cpu_timer = qemu_new_timer_ns(vm_clock, s390x_cpu_timer, env);
-#endif
     env->cpu_model_str = cpu_model;
-    env->cpu_num = cpu_num++;
-    env->ext_index = -1;
-    cpu_state_reset(env);
     qemu_init_vcpu(env);
     return env;
 }
@@ -121,15 +111,7 @@ int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw
 
 void cpu_state_reset(CPUS390XState *env)
 {
-    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
-        qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
-        log_cpu_state(env, 0);
-    }
-
-    memset(env, 0, offsetof(CPUS390XState, breakpoints));
-    /* FIXME: reset vector? */
-    tlb_flush(env, 1);
-    s390_add_running_cpu(env);
+    cpu_reset(ENV_GET_CPU(env));
 }
 
 #ifndef CONFIG_USER_ONLY
-- 
1.7.7