mirror of
https://github.com/Motorhead1991/qemu.git
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exec: split out non-softmmu-specific parts
Over the years, most parts of exec.c that were not specific to softmmu have been moved to accel/tcg; what's left is mostly the low-level part of the memory API, which includes RAMBlock and AddressSpaceDispatch. However exec.c also hosts 4-500 lines of code for the target specific parts of the CPU QOM object, plus a few functions for user-mode emulation that do not have a better place (they are not TCG-specific so accel/tcg/user-exec.c is not a good place either). Move these parts to a new file, so that exec.c can be moved to softmmu/physmem.c. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
parent
800d4deda0
commit
d9f24bf572
6 changed files with 467 additions and 451 deletions
452
cpu.c
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452
cpu.c
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@ -0,0 +1,452 @@
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/*
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* Target-specific parts of the CPU object
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qapi/error.h"
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#include "exec/target_page.h"
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#include "hw/qdev-core.h"
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#include "hw/qdev-properties.h"
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#include "qemu/error-report.h"
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#include "migration/vmstate.h"
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#ifdef CONFIG_USER_ONLY
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#include "qemu.h"
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#else
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#include "exec/address-spaces.h"
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#endif
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#include "sysemu/tcg.h"
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#include "sysemu/kvm.h"
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#include "sysemu/replay.h"
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#include "translate-all.h"
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#include "exec/log.h"
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uintptr_t qemu_host_page_size;
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intptr_t qemu_host_page_mask;
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#ifndef CONFIG_USER_ONLY
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static int cpu_common_post_load(void *opaque, int version_id)
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{
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CPUState *cpu = opaque;
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/* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
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version_id is increased. */
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cpu->interrupt_request &= ~0x01;
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tlb_flush(cpu);
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/* loadvm has just updated the content of RAM, bypassing the
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* usual mechanisms that ensure we flush TBs for writes to
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* memory we've translated code from. So we must flush all TBs,
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* which will now be stale.
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*/
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tb_flush(cpu);
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return 0;
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}
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static int cpu_common_pre_load(void *opaque)
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{
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CPUState *cpu = opaque;
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cpu->exception_index = -1;
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return 0;
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}
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static bool cpu_common_exception_index_needed(void *opaque)
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{
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CPUState *cpu = opaque;
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return tcg_enabled() && cpu->exception_index != -1;
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}
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static const VMStateDescription vmstate_cpu_common_exception_index = {
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.name = "cpu_common/exception_index",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = cpu_common_exception_index_needed,
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.fields = (VMStateField[]) {
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VMSTATE_INT32(exception_index, CPUState),
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VMSTATE_END_OF_LIST()
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}
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};
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static bool cpu_common_crash_occurred_needed(void *opaque)
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{
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CPUState *cpu = opaque;
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return cpu->crash_occurred;
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}
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static const VMStateDescription vmstate_cpu_common_crash_occurred = {
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.name = "cpu_common/crash_occurred",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = cpu_common_crash_occurred_needed,
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.fields = (VMStateField[]) {
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VMSTATE_BOOL(crash_occurred, CPUState),
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VMSTATE_END_OF_LIST()
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}
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};
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const VMStateDescription vmstate_cpu_common = {
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.name = "cpu_common",
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.version_id = 1,
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.minimum_version_id = 1,
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.pre_load = cpu_common_pre_load,
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.post_load = cpu_common_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(halted, CPUState),
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VMSTATE_UINT32(interrupt_request, CPUState),
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VMSTATE_END_OF_LIST()
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},
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.subsections = (const VMStateDescription*[]) {
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&vmstate_cpu_common_exception_index,
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&vmstate_cpu_common_crash_occurred,
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NULL
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}
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};
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#endif
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void cpu_exec_unrealizefn(CPUState *cpu)
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{
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CPUClass *cc = CPU_GET_CLASS(cpu);
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tlb_destroy(cpu);
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cpu_list_remove(cpu);
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#ifdef CONFIG_USER_ONLY
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assert(cc->vmsd == NULL);
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#else
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if (cc->vmsd != NULL) {
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vmstate_unregister(NULL, cc->vmsd, cpu);
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}
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if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
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vmstate_unregister(NULL, &vmstate_cpu_common, cpu);
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}
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tcg_iommu_free_notifier_list(cpu);
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#endif
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}
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Property cpu_common_props[] = {
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#ifndef CONFIG_USER_ONLY
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/* Create a memory property for softmmu CPU object,
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* so users can wire up its memory. (This can't go in hw/core/cpu.c
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* because that file is compiled only once for both user-mode
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* and system builds.) The default if no link is set up is to use
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* the system address space.
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*/
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DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION,
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MemoryRegion *),
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#endif
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DEFINE_PROP_BOOL("start-powered-off", CPUState, start_powered_off, false),
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DEFINE_PROP_END_OF_LIST(),
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};
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void cpu_exec_initfn(CPUState *cpu)
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{
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cpu->as = NULL;
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cpu->num_ases = 0;
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#ifndef CONFIG_USER_ONLY
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cpu->thread_id = qemu_get_thread_id();
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cpu->memory = get_system_memory();
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object_ref(OBJECT(cpu->memory));
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#endif
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}
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void cpu_exec_realizefn(CPUState *cpu, Error **errp)
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{
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CPUClass *cc = CPU_GET_CLASS(cpu);
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static bool tcg_target_initialized;
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cpu_list_add(cpu);
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if (tcg_enabled() && !tcg_target_initialized) {
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tcg_target_initialized = true;
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cc->tcg_initialize();
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}
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tlb_init(cpu);
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qemu_plugin_vcpu_init_hook(cpu);
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#ifdef CONFIG_USER_ONLY
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assert(cc->vmsd == NULL);
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#else /* !CONFIG_USER_ONLY */
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if (qdev_get_vmsd(DEVICE(cpu)) == NULL) {
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vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu);
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}
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if (cc->vmsd != NULL) {
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vmstate_register(NULL, cpu->cpu_index, cc->vmsd, cpu);
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}
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tcg_iommu_init_notifier_list(cpu);
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#endif
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}
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const char *parse_cpu_option(const char *cpu_option)
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{
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ObjectClass *oc;
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CPUClass *cc;
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gchar **model_pieces;
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const char *cpu_type;
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model_pieces = g_strsplit(cpu_option, ",", 2);
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if (!model_pieces[0]) {
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error_report("-cpu option cannot be empty");
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exit(1);
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}
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oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]);
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if (oc == NULL) {
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error_report("unable to find CPU model '%s'", model_pieces[0]);
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g_strfreev(model_pieces);
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exit(EXIT_FAILURE);
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}
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cpu_type = object_class_get_name(oc);
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cc = CPU_CLASS(oc);
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cc->parse_features(cpu_type, model_pieces[1], &error_fatal);
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g_strfreev(model_pieces);
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return cpu_type;
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}
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#if defined(CONFIG_USER_ONLY)
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void tb_invalidate_phys_addr(target_ulong addr)
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{
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mmap_lock();
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tb_invalidate_phys_page_range(addr, addr + 1);
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mmap_unlock();
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}
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static void breakpoint_invalidate(CPUState *cpu, target_ulong pc)
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{
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tb_invalidate_phys_addr(pc);
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}
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#else
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void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs)
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{
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ram_addr_t ram_addr;
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MemoryRegion *mr;
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hwaddr l = 1;
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if (!tcg_enabled()) {
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return;
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}
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RCU_READ_LOCK_GUARD();
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mr = address_space_translate(as, addr, &addr, &l, false, attrs);
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if (!(memory_region_is_ram(mr)
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|| memory_region_is_romd(mr))) {
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return;
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}
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ram_addr = memory_region_get_ram_addr(mr) + addr;
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tb_invalidate_phys_page_range(ram_addr, ram_addr + 1);
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}
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static void breakpoint_invalidate(CPUState *cpu, target_ulong pc)
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{
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/*
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* There may not be a virtual to physical translation for the pc
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* right now, but there may exist cached TB for this pc.
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* Flush the whole TB cache to force re-translation of such TBs.
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* This is heavyweight, but we're debugging anyway.
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*/
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tb_flush(cpu);
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}
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#endif
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/* Add a breakpoint. */
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int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags,
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CPUBreakpoint **breakpoint)
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{
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CPUBreakpoint *bp;
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bp = g_malloc(sizeof(*bp));
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bp->pc = pc;
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bp->flags = flags;
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/* keep all GDB-injected breakpoints in front */
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if (flags & BP_GDB) {
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QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry);
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} else {
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QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry);
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}
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breakpoint_invalidate(cpu, pc);
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if (breakpoint) {
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*breakpoint = bp;
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}
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return 0;
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}
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/* Remove a specific breakpoint. */
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int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags)
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{
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CPUBreakpoint *bp;
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QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
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if (bp->pc == pc && bp->flags == flags) {
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cpu_breakpoint_remove_by_ref(cpu, bp);
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return 0;
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}
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}
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return -ENOENT;
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}
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/* Remove a specific breakpoint by reference. */
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void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint)
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{
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QTAILQ_REMOVE(&cpu->breakpoints, breakpoint, entry);
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breakpoint_invalidate(cpu, breakpoint->pc);
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g_free(breakpoint);
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}
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/* Remove all matching breakpoints. */
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void cpu_breakpoint_remove_all(CPUState *cpu, int mask)
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{
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CPUBreakpoint *bp, *next;
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QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) {
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if (bp->flags & mask) {
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cpu_breakpoint_remove_by_ref(cpu, bp);
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}
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}
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}
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/* enable or disable single step mode. EXCP_DEBUG is returned by the
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CPU loop after each instruction */
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void cpu_single_step(CPUState *cpu, int enabled)
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{
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if (cpu->singlestep_enabled != enabled) {
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cpu->singlestep_enabled = enabled;
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if (kvm_enabled()) {
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kvm_update_guest_debug(cpu, 0);
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} else {
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/* must flush all the translated code to avoid inconsistencies */
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/* XXX: only flush what is necessary */
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tb_flush(cpu);
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}
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}
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}
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void cpu_abort(CPUState *cpu, const char *fmt, ...)
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{
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va_list ap;
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va_list ap2;
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va_start(ap, fmt);
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va_copy(ap2, ap);
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fprintf(stderr, "qemu: fatal: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP);
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if (qemu_log_separate()) {
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FILE *logfile = qemu_log_lock();
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qemu_log("qemu: fatal: ");
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qemu_log_vprintf(fmt, ap2);
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qemu_log("\n");
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log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP);
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qemu_log_flush();
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qemu_log_unlock(logfile);
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qemu_log_close();
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}
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va_end(ap2);
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va_end(ap);
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replay_finish();
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#if defined(CONFIG_USER_ONLY)
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{
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struct sigaction act;
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sigfillset(&act.sa_mask);
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act.sa_handler = SIG_DFL;
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act.sa_flags = 0;
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sigaction(SIGABRT, &act, NULL);
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}
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#endif
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abort();
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}
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/* physical memory access (slow version, mainly for debug) */
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#if defined(CONFIG_USER_ONLY)
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int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
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void *ptr, target_ulong len, bool is_write)
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{
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int flags;
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target_ulong l, page;
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void * p;
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uint8_t *buf = ptr;
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while (len > 0) {
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page = addr & TARGET_PAGE_MASK;
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l = (page + TARGET_PAGE_SIZE) - addr;
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if (l > len)
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l = len;
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flags = page_get_flags(page);
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if (!(flags & PAGE_VALID))
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return -1;
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if (is_write) {
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if (!(flags & PAGE_WRITE))
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return -1;
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/* XXX: this code should not depend on lock_user */
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if (!(p = lock_user(VERIFY_WRITE, addr, l, 0)))
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return -1;
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memcpy(p, buf, l);
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unlock_user(p, addr, l);
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} else {
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if (!(flags & PAGE_READ))
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return -1;
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/* XXX: this code should not depend on lock_user */
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if (!(p = lock_user(VERIFY_READ, addr, l, 1)))
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return -1;
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memcpy(buf, p, l);
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unlock_user(p, addr, 0);
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}
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len -= l;
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buf += l;
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addr += l;
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}
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return 0;
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}
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#endif
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bool target_words_bigendian(void)
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{
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#if defined(TARGET_WORDS_BIGENDIAN)
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return true;
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#else
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return false;
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#endif
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}
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void page_size_init(void)
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{
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/* NOTE: we can always suppose that qemu_host_page_size >=
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TARGET_PAGE_SIZE */
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if (qemu_host_page_size == 0) {
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qemu_host_page_size = qemu_real_host_page_size;
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}
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if (qemu_host_page_size < TARGET_PAGE_SIZE) {
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qemu_host_page_size = TARGET_PAGE_SIZE;
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}
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qemu_host_page_mask = -(intptr_t)qemu_host_page_size;
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}
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