qemu/target-alpha/cpu.c

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/*
* QEMU Alpha CPU
*
* Copyright (c) 2007 Jocelyn Mayer
* 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 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>
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
static void alpha_cpu_set_pc(CPUState *cs, vaddr value)
{
AlphaCPU *cpu = ALPHA_CPU(cs);
cpu->env.pc = value;
}
static bool alpha_cpu_has_work(CPUState *cs)
{
/* Here we are checking to see if the CPU should wake up from HALT.
We will have gotten into this state only for WTINT from PALmode. */
/* ??? I'm not sure how the IPL state works with WTINT to keep a CPU
asleep even if (some) interrupts have been asserted. For now,
assume that if a CPU really wants to stay asleep, it will mask
interrupts at the chipset level, which will prevent these bits
from being set in the first place. */
return cs->interrupt_request & (CPU_INTERRUPT_HARD
| CPU_INTERRUPT_TIMER
| CPU_INTERRUPT_SMP
| CPU_INTERRUPT_MCHK);
}
static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_mach_alpha_ev6;
info->print_insn = print_insn_alpha;
}
static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
qemu_init_vcpu(cs);
acc->parent_realize(dev, errp);
}
/* Sort alphabetically by type name. */
static gint alpha_cpu_list_compare(gconstpointer a, gconstpointer b)
{
ObjectClass *class_a = (ObjectClass *)a;
ObjectClass *class_b = (ObjectClass *)b;
const char *name_a, *name_b;
name_a = object_class_get_name(class_a);
name_b = object_class_get_name(class_b);
return strcmp(name_a, name_b);
}
static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
CPUListState *s = user_data;
(*s->cpu_fprintf)(s->file, " %s\n",
object_class_get_name(oc));
}
void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf)
{
CPUListState s = {
.file = f,
.cpu_fprintf = cpu_fprintf,
};
GSList *list;
list = object_class_get_list(TYPE_ALPHA_CPU, false);
list = g_slist_sort(list, alpha_cpu_list_compare);
(*cpu_fprintf)(f, "Available CPUs:\n");
g_slist_foreach(list, alpha_cpu_list_entry, &s);
g_slist_free(list);
}
/* Models */
#define TYPE(model) model "-" TYPE_ALPHA_CPU
typedef struct AlphaCPUAlias {
const char *alias;
const char *typename;
} AlphaCPUAlias;
static const AlphaCPUAlias alpha_cpu_aliases[] = {
{ "21064", TYPE("ev4") },
{ "21164", TYPE("ev5") },
{ "21164a", TYPE("ev56") },
{ "21164pc", TYPE("pca56") },
{ "21264", TYPE("ev6") },
{ "21264a", TYPE("ev67") },
};
static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc = NULL;
char *typename;
int i;
if (cpu_model == NULL) {
return NULL;
}
oc = object_class_by_name(cpu_model);
if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
!object_class_is_abstract(oc)) {
return oc;
}
for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
oc = object_class_by_name(alpha_cpu_aliases[i].typename);
assert(oc != NULL && !object_class_is_abstract(oc));
return oc;
}
}
typename = g_strdup_printf("%s-" TYPE_ALPHA_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc != NULL && object_class_is_abstract(oc)) {
oc = NULL;
}
return oc;
}
AlphaCPU *cpu_alpha_init(const char *cpu_model)
{
AlphaCPU *cpu;
ObjectClass *cpu_class;
cpu_class = alpha_cpu_class_by_name(cpu_model);
if (cpu_class == NULL) {
/* Default to ev67; no reason not to emulate insns by default. */
cpu_class = object_class_by_name(TYPE("ev67"));
}
cpu = ALPHA_CPU(object_new(object_class_get_name(cpu_class)));
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
return cpu;
}
static void ev4_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_2106x;
}
static const TypeInfo ev4_cpu_type_info = {
.name = TYPE("ev4"),
.parent = TYPE_ALPHA_CPU,
.instance_init = ev4_cpu_initfn,
};
static void ev5_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_21164;
}
static const TypeInfo ev5_cpu_type_info = {
.name = TYPE("ev5"),
.parent = TYPE_ALPHA_CPU,
.instance_init = ev5_cpu_initfn,
};
static void ev56_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_BWX;
}
static const TypeInfo ev56_cpu_type_info = {
.name = TYPE("ev56"),
.parent = TYPE("ev5"),
.instance_init = ev56_cpu_initfn,
};
static void pca56_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_MVI;
}
static const TypeInfo pca56_cpu_type_info = {
.name = TYPE("pca56"),
.parent = TYPE("ev56"),
.instance_init = pca56_cpu_initfn,
};
static void ev6_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->implver = IMPLVER_21264;
env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
}
static const TypeInfo ev6_cpu_type_info = {
.name = TYPE("ev6"),
.parent = TYPE_ALPHA_CPU,
.instance_init = ev6_cpu_initfn,
};
static void ev67_cpu_initfn(Object *obj)
{
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
env->amask |= AMASK_CIX | AMASK_PREFETCH;
}
static const TypeInfo ev67_cpu_type_info = {
.name = TYPE("ev67"),
.parent = TYPE("ev6"),
.instance_init = ev67_cpu_initfn,
};
static const TypeInfo ev68_cpu_type_info = {
.name = TYPE("ev68"),
.parent = TYPE("ev67"),
};
static void alpha_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
AlphaCPU *cpu = ALPHA_CPU(obj);
CPUAlphaState *env = &cpu->env;
cs->env_ptr = env;
cpu_exec_init(cs, &error_abort);
tlb_flush(cs, 1);
alpha_translate_init();
#if defined(CONFIG_USER_ONLY)
env->ps = PS_USER_MODE;
cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD
| FPCR_UNFD | FPCR_INED | FPCR_DNOD
| FPCR_DYN_NORMAL));
#endif
env->lock_addr = -1;
env->fen = 1;
}
static void alpha_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
acc->parent_realize = dc->realize;
dc->realize = alpha_cpu_realizefn;
cc->class_by_name = alpha_cpu_class_by_name;
cc->has_work = alpha_cpu_has_work;
cc->do_interrupt = alpha_cpu_do_interrupt;
cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
cc->dump_state = alpha_cpu_dump_state;
cc->set_pc = alpha_cpu_set_pc;
cc->gdb_read_register = alpha_cpu_gdb_read_register;
cc->gdb_write_register = alpha_cpu_gdb_write_register;
#ifdef CONFIG_USER_ONLY
cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault;
#else
cc->do_unassigned_access = alpha_cpu_unassigned_access;
cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
dc->vmsd = &vmstate_alpha_cpu;
#endif
cc->disas_set_info = alpha_cpu_disas_set_info;
cc->gdb_num_core_regs = 67;
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 11:59:58 +03:00
/*
* Reason: alpha_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 alpha_cpu_type_info = {
.name = TYPE_ALPHA_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(AlphaCPU),
.instance_init = alpha_cpu_initfn,
.abstract = true,
.class_size = sizeof(AlphaCPUClass),
.class_init = alpha_cpu_class_init,
};
static void alpha_cpu_register_types(void)
{
type_register_static(&alpha_cpu_type_info);
type_register_static(&ev4_cpu_type_info);
type_register_static(&ev5_cpu_type_info);
type_register_static(&ev56_cpu_type_info);
type_register_static(&pca56_cpu_type_info);
type_register_static(&ev6_cpu_type_info);
type_register_static(&ev67_cpu_type_info);
type_register_static(&ev68_cpu_type_info);
}
type_init(alpha_cpu_register_types)