Initial import of qemu-2.4.1HEADmaster

1 files changed, 381 insertions, 0 deletions

diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
new file mode 100644
index 00000000..ccfaa8a9
--- /dev/null
+++ b/target-s390x/cpu.c
@@ -0,0 +1,381 @@
+/*
+ * QEMU S/390 CPU
+ *
+ * Copyright (c) 2009 Ulrich Hecht
+ * Copyright (c) 2011 Alexander Graf
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ * Copyright (c) 2012 IBM Corp.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/lgpl-2.1.html>
+ * Contributions after 2012-12-11 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "cpu.h"
+#include "qemu-common.h"
+#include "qemu/timer.h"
+#include "qemu/error-report.h"
+#include "hw/hw.h"
+#include "trace.h"
+#ifndef CONFIG_USER_ONLY
+#include "sysemu/arch_init.h"
+#endif
+
+#define CR0_RESET       0xE0UL
+#define CR14_RESET      0xC2000000UL;
+
+/* generate CPU information for cpu -? */
+void s390_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+#ifdef CONFIG_KVM
+    (*cpu_fprintf)(f, "s390 %16s\n", "host");
+#endif
+}
+
+#ifndef CONFIG_USER_ONLY
+CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
+{
+    CpuDefinitionInfoList *entry;
+    CpuDefinitionInfo *info;
+
+    info = g_malloc0(sizeof(*info));
+    info->name = g_strdup("host");
+
+    entry = g_malloc0(sizeof(*entry));
+    entry->value = info;
+
+    return entry;
+}
+#endif
+
+static void s390_cpu_set_pc(CPUState *cs, vaddr value)
+{
+    S390CPU *cpu = S390_CPU(cs);
+
+    cpu->env.psw.addr = value;
+}
+
+static bool s390_cpu_has_work(CPUState *cs)
+{
+    S390CPU *cpu = S390_CPU(cs);
+    CPUS390XState *env = &cpu->env;
+
+    return (cs->interrupt_request & CPU_INTERRUPT_HARD) &&
+           (env->psw.mask & PSW_MASK_EXT);
+}
+
+#if !defined(CONFIG_USER_ONLY)
+/* S390CPUClass::load_normal() */
+static void s390_cpu_load_normal(CPUState *s)
+{
+    S390CPU *cpu = S390_CPU(s);
+    cpu->env.psw.addr = ldl_phys(s->as, 4) & PSW_MASK_ESA_ADDR;
+    cpu->env.psw.mask = PSW_MASK_32 | PSW_MASK_64;
+    s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
+}
+#endif
+
+/* S390CPUClass::cpu_reset() */
+static void s390_cpu_reset(CPUState *s)
+{
+    S390CPU *cpu = S390_CPU(s);
+    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
+    CPUS390XState *env = &cpu->env;
+
+    env->pfault_token = -1UL;
+    scc->parent_reset(s);
+    cpu->env.sigp_order = 0;
+    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
+    tlb_flush(s, 1);
+}
+
+/* S390CPUClass::initial_reset() */
+static void s390_cpu_initial_reset(CPUState *s)
+{
+    S390CPU *cpu = S390_CPU(s);
+    CPUS390XState *env = &cpu->env;
+    int i;
+
+    s390_cpu_reset(s);
+    /* initial reset does not touch regs,fregs and aregs */
+    memset(&env->fpc, 0, offsetof(CPUS390XState, cpu_num) -
+                         offsetof(CPUS390XState, fpc));
+
+    /* architectured initial values for CR 0 and 14 */
+    env->cregs[0] = CR0_RESET;
+    env->cregs[14] = CR14_RESET;
+
+    /* architectured initial value for Breaking-Event-Address register */
+    env->gbea = 1;
+
+    env->pfault_token = -1UL;
+    env->ext_index = -1;
+    for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
+        env->io_index[i] = -1;
+    }
+
+    /* tininess for underflow is detected before rounding */
+    set_float_detect_tininess(float_tininess_before_rounding,
+                              &env->fpu_status);
+
+    /* Reset state inside the kernel that we cannot access yet from QEMU. */
+    if (kvm_enabled()) {
+        kvm_s390_reset_vcpu(cpu);
+    }
+    tlb_flush(s, 1);
+}
+
+/* CPUClass:reset() */
+static void s390_cpu_full_reset(CPUState *s)
+{
+    S390CPU *cpu = S390_CPU(s);
+    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
+    CPUS390XState *env = &cpu->env;
+    int i;
+
+    scc->parent_reset(s);
+    cpu->env.sigp_order = 0;
+    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
+
+    memset(env, 0, offsetof(CPUS390XState, cpu_num));
+
+    /* architectured initial values for CR 0 and 14 */
+    env->cregs[0] = CR0_RESET;
+    env->cregs[14] = CR14_RESET;
+
+    /* architectured initial value for Breaking-Event-Address register */
+    env->gbea = 1;
+
+    env->pfault_token = -1UL;
+    env->ext_index = -1;
+    for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
+        env->io_index[i] = -1;
+    }
+
+    /* tininess for underflow is detected before rounding */
+    set_float_detect_tininess(float_tininess_before_rounding,
+                              &env->fpu_status);
+
+    /* Reset state inside the kernel that we cannot access yet from QEMU. */
+    if (kvm_enabled()) {
+        kvm_s390_reset_vcpu(cpu);
+    }
+    tlb_flush(s, 1);
+}
+
+#if !defined(CONFIG_USER_ONLY)
+static void s390_cpu_machine_reset_cb(void *opaque)
+{
+    S390CPU *cpu = opaque;
+
+    run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, CPU(cpu));
+}
+#endif
+
+static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cs = CPU(dev);
+    S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
+
+    s390_cpu_gdb_init(cs);
+    qemu_init_vcpu(cs);
+#if !defined(CONFIG_USER_ONLY)
+    run_on_cpu(cs, s390_do_cpu_full_reset, cs);
+#else
+    cpu_reset(cs);
+#endif
+
+    scc->parent_realize(dev, errp);
+}
+
+static void s390_cpu_initfn(Object *obj)
+{
+    CPUState *cs = CPU(obj);
+    S390CPU *cpu = S390_CPU(obj);
+    CPUS390XState *env = &cpu->env;
+    static bool inited;
+    static int cpu_num = 0;
+#if !defined(CONFIG_USER_ONLY)
+    struct tm tm;
+#endif
+
+    cs->env_ptr = env;
+    cpu_exec_init(cs, &error_abort);
+#if !defined(CONFIG_USER_ONLY)
+    qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
+    qemu_get_timedate(&tm, 0);
+    env->tod_offset = TOD_UNIX_EPOCH +
+                      (time2tod(mktimegm(&tm)) * 1000000000ULL);
+    env->tod_basetime = 0;
+    env->tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu);
+    env->cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu);
+    s390_cpu_set_state(CPU_STATE_STOPPED, cpu);
+#endif
+    env->cpu_num = cpu_num++;
+
+    if (tcg_enabled() && !inited) {
+        inited = true;
+        s390x_translate_init();
+    }
+}
+
+static void s390_cpu_finalize(Object *obj)
+{
+#if !defined(CONFIG_USER_ONLY)
+    S390CPU *cpu = S390_CPU(obj);
+
+    qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu);
+    g_free(cpu->irqstate);
+#endif
+}
+
+#if !defined(CONFIG_USER_ONLY)
+static bool disabled_wait(CPUState *cpu)
+{
+    return cpu->halted && !(S390_CPU(cpu)->env.psw.mask &
+                            (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK));
+}
+
+static unsigned s390_count_running_cpus(void)
+{
+    CPUState *cpu;
+    int nr_running = 0;
+
+    CPU_FOREACH(cpu) {
+        uint8_t state = S390_CPU(cpu)->env.cpu_state;
+        if (state == CPU_STATE_OPERATING ||
+            state == CPU_STATE_LOAD) {
+            if (!disabled_wait(cpu)) {
+                nr_running++;
+            }
+        }
+    }
+
+    return nr_running;
+}
+
+unsigned int s390_cpu_halt(S390CPU *cpu)
+{
+    CPUState *cs = CPU(cpu);
+    trace_cpu_halt(cs->cpu_index);
+
+    if (!cs->halted) {
+        cs->halted = 1;
+        cs->exception_index = EXCP_HLT;
+    }
+
+    return s390_count_running_cpus();
+}
+
+void s390_cpu_unhalt(S390CPU *cpu)
+{
+    CPUState *cs = CPU(cpu);
+    trace_cpu_unhalt(cs->cpu_index);
+
+    if (cs->halted) {
+        cs->halted = 0;
+        cs->exception_index = -1;
+    }
+}
+
+unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
+ {
+    trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state);
+
+    switch (cpu_state) {
+    case CPU_STATE_STOPPED:
+    case CPU_STATE_CHECK_STOP:
+        /* halt the cpu for common infrastructure */
+        s390_cpu_halt(cpu);
+        break;
+    case CPU_STATE_OPERATING:
+    case CPU_STATE_LOAD:
+        /* unhalt the cpu for common infrastructure */
+        s390_cpu_unhalt(cpu);
+        break;
+    default:
+        error_report("Requested CPU state is not a valid S390 CPU state: %u",
+                     cpu_state);
+        exit(1);
+    }
+    if (kvm_enabled() && cpu->env.cpu_state != cpu_state) {
+        kvm_s390_set_cpu_state(cpu, cpu_state);
+    }
+    cpu->env.cpu_state = cpu_state;
+
+    return s390_count_running_cpus();
+}
+#endif
+
+static void s390_cpu_class_init(ObjectClass *oc, void *data)
+{
+    S390CPUClass *scc = S390_CPU_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(scc);
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    scc->parent_realize = dc->realize;
+    dc->realize = s390_cpu_realizefn;
+
+    scc->parent_reset = cc->reset;
+#if !defined(CONFIG_USER_ONLY)
+    scc->load_normal = s390_cpu_load_normal;
+#endif
+    scc->cpu_reset = s390_cpu_reset;
+    scc->initial_cpu_reset = s390_cpu_initial_reset;
+    cc->reset = s390_cpu_full_reset;
+    cc->has_work = s390_cpu_has_work;
+    cc->do_interrupt = s390_cpu_do_interrupt;
+    cc->dump_state = s390_cpu_dump_state;
+    cc->set_pc = s390_cpu_set_pc;
+    cc->gdb_read_register = s390_cpu_gdb_read_register;
+    cc->gdb_write_register = s390_cpu_gdb_write_register;
+#ifdef CONFIG_USER_ONLY
+    cc->handle_mmu_fault = s390_cpu_handle_mmu_fault;
+#else
+    cc->get_phys_page_debug = s390_cpu_get_phys_page_debug;
+    cc->vmsd = &vmstate_s390_cpu;
+    cc->write_elf64_note = s390_cpu_write_elf64_note;
+    cc->write_elf64_qemunote = s390_cpu_write_elf64_qemunote;
+    cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
+    cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
+#endif
+    cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
+    cc->gdb_core_xml_file = "s390x-core64.xml";
+
+    /*
+     * Reason: s390_cpu_initfn() calls cpu_exec_init(), which saves
+     * the object in cpus -> dangling pointer after final
+     * object_unref().
+     */
+    dc->cannot_destroy_with_object_finalize_yet = true;
+}
+
+static const TypeInfo s390_cpu_type_info = {
+    .name = TYPE_S390_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(S390CPU),
+    .instance_init = s390_cpu_initfn,
+    .instance_finalize = s390_cpu_finalize,
+    .abstract = false,
+    .class_size = sizeof(S390CPUClass),
+    .class_init = s390_cpu_class_init,
+};
+
+static void s390_cpu_register_types(void)
+{
+    type_register_static(&s390_cpu_type_info);
+}
+
+type_init(s390_cpu_register_types)