LXR qemu/accel/tcg/tcg-all.c

   1/*
   2 * QEMU System Emulator, accelerator interfaces
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 * Copyright (c) 2014 Red Hat Inc.
   6 *
   7 * Permission is hereby granted, free of charge, to any person obtaining a copy
   8 * of this software and associated documentation files (the "Software"), to deal
   9 * in the Software without restriction, including without limitation the rights
  10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 * copies of the Software, and to permit persons to whom the Software is
  12 * furnished to do so, subject to the following conditions:
  13 *
  14 * The above copyright notice and this permission notice shall be included in
  15 * all copies or substantial portions of the Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23 * THE SOFTWARE.
  24 */
  25
  26#include "qemu/osdep.h"
  27#include "sysemu/accel.h"
  28#include "sysemu/sysemu.h"
  29#include "sysemu/tcg.h"
  30#include "qom/object.h"
  31#include "cpu.h"
  32#include "sysemu/cpus.h"
  33#include "qemu/main-loop.h"
  34
  35unsigned long tcg_tb_size;
  36
  37/* mask must never be zero, except for A20 change call */
  38static void tcg_handle_interrupt(CPUState *cpu, int mask)
  39{
  40    int old_mask;
  41    g_assert(qemu_mutex_iothread_locked());
  42
  43    old_mask = cpu->interrupt_request;
  44    cpu->interrupt_request |= mask;
  45
  46    /*
  47     * If called from iothread context, wake the target cpu in
  48     * case its halted.
  49     */
  50    if (!qemu_cpu_is_self(cpu)) {
  51        qemu_cpu_kick(cpu);
  52    } else {
  53        atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
  54        if (use_icount &&
  55            !cpu->can_do_io
  56            && (mask & ~old_mask) != 0) {
  57            cpu_abort(cpu, "Raised interrupt while not in I/O function");
  58        }
  59    }
  60}
  61
  62static int tcg_init(MachineState *ms)
  63{
  64    tcg_exec_init(tcg_tb_size * 1024 * 1024);
  65    cpu_interrupt_handler = tcg_handle_interrupt;
  66    return 0;
  67}
  68
  69static void tcg_accel_class_init(ObjectClass *oc, void *data)
  70{
  71    AccelClass *ac = ACCEL_CLASS(oc);
  72    ac->name = "tcg";
  73    ac->init_machine = tcg_init;
  74    ac->allowed = &tcg_allowed;
  75}
  76
  77#define TYPE_TCG_ACCEL ACCEL_CLASS_NAME("tcg")
  78
  79static const TypeInfo tcg_accel_type = {
  80    .name = TYPE_TCG_ACCEL,
  81    .parent = TYPE_ACCEL,
  82    .class_init = tcg_accel_class_init,
  83};
  84
  85static void register_accel_types(void)
  86{
  87    type_register_static(&tcg_accel_type);
  88}
  89
  90type_init(register_accel_types);
  91