qemu-e2k/target/s390x/cpu.c

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/*
* 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 "qemu/osdep.h"
2016-03-14 09:01:28 +01:00
#include "qapi/error.h"
#include "cpu.h"
#include "internal.h"
#include "kvm_s390x.h"
#include "sysemu/kvm.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/timer.h"
#include "qemu/error-report.h"
#include "trace.h"
#include "qapi/visitor.h"
#include "exec/exec-all.h"
#include "hw/qdev-properties.h"
#ifndef CONFIG_USER_ONLY
#include "hw/hw.h"
#include "sysemu/arch_init.h"
#include "sysemu/sysemu.h"
#endif
#define CR0_RESET 0xE0UL
#define CR14_RESET 0xC2000000UL;
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);
/* STOPPED cpus can never wake up */
if (s390_cpu_get_state(cpu) != CPU_STATE_LOAD &&
s390_cpu_get_state(cpu) != CPU_STATE_OPERATING) {
return false;
}
if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
return false;
}
return s390_cpu_has_int(cpu);
}
#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);
}
/* 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 clear everything! */
memset(&env->start_initial_reset_fields, 0,
offsetof(CPUS390XState, end_reset_fields) -
offsetof(CPUS390XState, start_initial_reset_fields));
/* 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;
for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
env->io_index[i] = -1;
}
env->mchk_index = -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);
}
}
/* 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, end_reset_fields));
/* 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;
for (i = 0; i < ARRAY_SIZE(env->io_index); i++) {
env->io_index[i] = -1;
}
env->mchk_index = -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);
}
}
#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, RUN_ON_CPU_NULL);
}
#endif
static void s390_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_mach_s390_64;
info->print_insn = print_insn_s390;
}
static void s390_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
S390CPUClass *scc = S390_CPU_GET_CLASS(dev);
#if !defined(CONFIG_USER_ONLY)
S390CPU *cpu = S390_CPU(dev);
#endif
Error *err = NULL;
/* the model has to be realized before qemu_init_vcpu() due to kvm */
s390_realize_cpu_model(cs, &err);
if (err) {
goto out;
}
#if !defined(CONFIG_USER_ONLY)
if (cpu->env.core_id >= max_cpus) {
error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
", maximum core-id: %d", cpu->env.core_id,
max_cpus - 1);
goto out;
}
if (cpu_exists(cpu->env.core_id)) {
error_setg(&err, "Unable to add CPU with core-id: %" PRIu32
", it already exists", cpu->env.core_id);
goto out;
}
/* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */
cs->cpu_index = cpu->env.core_id;
#endif
cpu_exec_realizefn(cs, &err);
if (err != NULL) {
goto out;
}
#if !defined(CONFIG_USER_ONLY)
qemu_register_reset(s390_cpu_machine_reset_cb, cpu);
#endif
s390_cpu_gdb_init(cs);
qemu_init_vcpu(cs);
#if !defined(CONFIG_USER_ONLY)
run_on_cpu(cs, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
#else
cpu_reset(cs);
#endif
scc->parent_realize(dev, &err);
out:
error_propagate(errp, err);
}
static void s390_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
S390CPU *cpu = S390_CPU(obj);
CPUS390XState *env = &cpu->env;
#if !defined(CONFIG_USER_ONLY)
struct tm tm;
#endif
cs->env_ptr = env;
cs->halted = 1;
cs->exception_index = EXCP_HLT;
s390_cpu_model_register_props(obj);
#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 = 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
}
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:
/*
* Starting a CPU with a PSW WAIT bit set:
* KVM: handles this internally and triggers another WAIT exit.
* TCG: will actually try to continue to run. Don't unhalt, will
* be done when the CPU actually has work (an interrupt).
*/
if (!tcg_enabled() || !(cpu->env.psw.mask & PSW_MASK_WAIT)) {
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();
}
int s390_get_clock(uint8_t *tod_high, uint64_t *tod_low)
{
int r = 0;
if (kvm_enabled()) {
r = kvm_s390_get_clock_ext(tod_high, tod_low);
if (r == -ENXIO) {
return kvm_s390_get_clock(tod_high, tod_low);
}
} else {
/* Fixme TCG */
*tod_high = 0;
*tod_low = 0;
}
return r;
}
int s390_set_clock(uint8_t *tod_high, uint64_t *tod_low)
{
int r = 0;
if (kvm_enabled()) {
r = kvm_s390_set_clock_ext(tod_high, tod_low);
if (r == -ENXIO) {
return kvm_s390_set_clock(tod_high, tod_low);
}
}
/* Fixme TCG */
return r;
}
int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit)
{
if (kvm_enabled()) {
return kvm_s390_set_mem_limit(new_limit, hw_limit);
}
return 0;
}
void s390_cmma_reset(void)
{
if (kvm_enabled()) {
kvm_s390_cmma_reset();
}
}
int s390_get_memslot_count(void)
{
if (kvm_enabled()) {
return kvm_s390_get_memslot_count();
} else {
return MAX_AVAIL_SLOTS;
}
}
int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id,
int vq, bool assign)
{
if (kvm_enabled()) {
return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign);
} else {
return 0;
}
}
void s390_crypto_reset(void)
{
if (kvm_enabled()) {
kvm_s390_crypto_reset();
}
}
bool s390_get_squash_mcss(void)
{
if (object_property_get_bool(OBJECT(qdev_get_machine()), "s390-squash-mcss",
NULL)) {
return true;
}
return false;
}
void s390_enable_css_support(S390CPU *cpu)
{
if (kvm_enabled()) {
kvm_s390_enable_css_support(cpu);
}
}
#endif
static gchar *s390_gdb_arch_name(CPUState *cs)
{
return g_strdup("s390:64-bit");
}
static Property s390x_cpu_properties[] = {
#if !defined(CONFIG_USER_ONLY)
DEFINE_PROP_UINT32("core-id", S390CPU, env.core_id, 0),
#endif
DEFINE_PROP_END_OF_LIST()
};
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;
dc->props = s390x_cpu_properties;
dc->user_creatable = true;
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->class_by_name = s390_cpu_class_by_name,
cc->has_work = s390_cpu_has_work;
#ifdef CONFIG_TCG
cc->do_interrupt = s390_cpu_do_interrupt;
#endif
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;
#ifdef CONFIG_TCG
cc->cpu_exec_interrupt = s390_cpu_exec_interrupt;
cc->debug_excp_handler = s390x_cpu_debug_excp_handler;
cc->do_unaligned_access = s390x_cpu_do_unaligned_access;
#endif
#endif
cc->disas_set_info = s390_cpu_disas_set_info;
#ifdef CONFIG_TCG
cc->tcg_initialize = s390x_translate_init;
#endif
cc->gdb_num_core_regs = S390_NUM_CORE_REGS;
cc->gdb_core_xml_file = "s390x-core64.xml";
cc->gdb_arch_name = s390_gdb_arch_name;
qdev: Protect device-list-properties against broken devices Several devices don't survive object_unref(object_new(T)): they crash or hang during cleanup, or they leave dangling pointers behind. This breaks at least device-list-properties, because qmp_device_list_properties() needs to create a device to find its properties. Broken in commit f4eb32b "qmp: show QOM properties in device-list-properties", v2.1. Example reproducer: $ qemu-system-aarch64 -nodefaults -display none -machine none -S -qmp stdio {"QMP": {"version": {"qemu": {"micro": 50, "minor": 4, "major": 2}, "package": ""}, "capabilities": []}} { "execute": "qmp_capabilities" } {"return": {}} { "execute": "device-list-properties", "arguments": { "typename": "pxa2xx-pcmcia" } } qemu-system-aarch64: /home/armbru/work/qemu/memory.c:1307: memory_region_finalize: Assertion `((&mr->subregions)->tqh_first == ((void *)0))' failed. Aborted (core dumped) [Exit 134 (SIGABRT)] Unfortunately, I can't fix the problems in these devices right now. Instead, add DeviceClass member cannot_destroy_with_object_finalize_yet to mark them: * Hang during cleanup (didn't debug, so I can't say why): "realview_pci", "versatile_pci". * Dangling pointer in cpus: most CPUs, plus "allwinner-a10", "digic", "fsl,imx25", "fsl,imx31", "xlnx,zynqmp", because they create such CPUs * Assert kvm_enabled(): "host-x86_64-cpu", host-i386-cpu", "host-powerpc64-cpu", "host-embedded-powerpc-cpu", "host-powerpc-cpu" (the powerpc ones can't currently reach the assertion, because the CPUs are only registered when KVM is enabled, but the assertion is arguably in the wrong place all the same) Make qmp_device_list_properties() fail cleanly when the device is so marked. This improves device-list-properties from "crashes, hangs or leaves dangling pointers behind" to "fails". Not a complete fix, just a better-than-nothing work-around. In the above reproducer, device-list-properties now fails with "Can't list properties of device 'pxa2xx-pcmcia'". This also protects -device FOO,help, which uses the same machinery since commit ef52358 "qdev-monitor: include QOM properties in -device FOO, help output", v2.2. Example reproducer: $ qemu-system-aarch64 -machine none -device pxa2xx-pcmcia,help Before: qemu-system-aarch64: .../memory.c:1307: memory_region_finalize: Assertion `((&mr->subregions)->tqh_first == ((void *)0))' failed. After: Can't list properties of device 'pxa2xx-pcmcia' Cc: "Andreas Färber" <afaerber@suse.de> Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com> Cc: Alexander Graf <agraf@suse.de> Cc: Anthony Green <green@moxielogic.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Cc: Blue Swirl <blauwirbel@gmail.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Jia Liu <proljc@gmail.com> Cc: Leon Alrae <leon.alrae@imgtec.com> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Walle <michael@walle.cc> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Richard Henderson <rth@twiddle.net> Cc: qemu-ppc@nongnu.org Cc: qemu-stable@nongnu.org Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <1443689999-12182-10-git-send-email-armbru@redhat.com>
2015-10-01 10:59:58 +02:00
s390_cpu_model_class_register_props(oc);
}
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 = true,
.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)