qemu/accel/tcg/translate-common.c

/*
 *  Host code generation common components
 *
 *  Copyright (c) 2015 Peter Crosthwaite <crosthwaite.peter@gmail.com>
 *
 * 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 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/>.
 */

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qom/cpu.h"
#include "sysemu/cpus.h"
#include "qemu/main-loop.h"

#ifndef CONFIG_USER_ONLY
/* mask must never be zero, except for A20 change call */
static void tcg_handle_interrupt(CPUState *cpu, int mask)
{
    int old_mask;
    g_assert(qemu_mutex_iothread_locked());

    old_mask = cpu->interrupt_request;
    cpu->interrupt_request |= mask;

    /*
     * If called from iothread context, wake the target cpu in
     * case its halted.
     */
    if (!qemu_cpu_is_self(cpu)) {
        qemu_cpu_kick(cpu);
    } else {
        cpu->icount_decr.u16.high = -1;
        if (use_icount &&
            !cpu->can_do_io
            && (mask & ~old_mask) != 0) {
            cpu_abort(cpu, "Raised interrupt while not in I/O function");
        }
    }
}

CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
#endif