mirror of
https://github.com/qemu/qemu.git
synced 2024-12-05 17:53:36 +08:00
cbed0ba78f
The s390_cpu_initial_reset function zeroes a big part of the CPU state structure, including CPU_COMMON, and thus the QEMU TLB structure. As they should not be initialized with zeroes only, we need to call the tlb_flush to initialize it correctly. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Alexander Graf <agraf@suse.de>
368 lines
9.6 KiB
C
368 lines
9.6 KiB
C
/*
|
|
* 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;
|
|
|
|
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;
|
|
|
|
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(env);
|
|
#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;
|
|
#endif
|
|
cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
|
|
cc->gdb_core_xml_file = "s390x-core64.xml";
|
|
}
|
|
|
|
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)
|