Skip to main content

Browse the archive

Revision 979e7ea7ebf86e40c97c62aa3aa2f4a4611e6697 authored by Michael Walle on 09 January 2018, 17:01:13 UTC, committed by Michael Roth on 21 June 2018, 01:45:03 UTC 
lm32: take BQL before writing IP/IM register
 
Writing to these registers may raise an interrupt request. Actually,
this prevents the milkymist board from starting.

Cc: qemu-stable@nongnu.org
Signed-off-by: Michael Walle <michael@walle.cc>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
(cherry picked from commit 81e9cbd0ca1131012b058df6804b1f626a6b730c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
1 parent 15fb5db
Raw File
iothread.c 
/*
 * Event loop thread implementation for unit tests
 *
 * Copyright Red Hat Inc., 2013, 2016
 *
 * Authors:
 *  Stefan Hajnoczi   <stefanha@redhat.com>
 *  Paolo Bonzini     <pbonzini@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "block/aio.h"
#include "qemu/main-loop.h"
#include "qemu/rcu.h"
#include "iothread.h"

struct IOThread {
    AioContext *ctx;

    QemuThread thread;
    QemuMutex init_done_lock;
    QemuCond init_done_cond;    /* is thread initialization done? */
    bool stopping;
};

static __thread IOThread *my_iothread;

AioContext *qemu_get_current_aio_context(void)
{
    return my_iothread ? my_iothread->ctx : qemu_get_aio_context();
}

static void *iothread_run(void *opaque)
{
    IOThread *iothread = opaque;

    rcu_register_thread();

    my_iothread = iothread;
    qemu_mutex_lock(&iothread->init_done_lock);
    iothread->ctx = aio_context_new(&error_abort);
    qemu_cond_signal(&iothread->init_done_cond);
    qemu_mutex_unlock(&iothread->init_done_lock);

    while (!atomic_read(&iothread->stopping)) {
        aio_poll(iothread->ctx, true);
    }

    rcu_unregister_thread();
    return NULL;
}

void iothread_join(IOThread *iothread)
{
    iothread->stopping = true;
    aio_notify(iothread->ctx);
    qemu_thread_join(&iothread->thread);
    qemu_cond_destroy(&iothread->init_done_cond);
    qemu_mutex_destroy(&iothread->init_done_lock);
    aio_context_unref(iothread->ctx);
    g_free(iothread);
}

IOThread *iothread_new(void)
{
    IOThread *iothread = g_new0(IOThread, 1);

    qemu_mutex_init(&iothread->init_done_lock);
    qemu_cond_init(&iothread->init_done_cond);
    qemu_thread_create(&iothread->thread, NULL, iothread_run,
                       iothread, QEMU_THREAD_JOINABLE);

    /* Wait for initialization to complete */
    qemu_mutex_lock(&iothread->init_done_lock);
    while (iothread->ctx == NULL) {
        qemu_cond_wait(&iothread->init_done_cond,
                       &iothread->init_done_lock);
    }
    qemu_mutex_unlock(&iothread->init_done_lock);
    return iothread;
}

AioContext *iothread_get_aio_context(IOThread *iothread)
{
    return iothread->ctx;
}
back to top