63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/*
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* vhost shadow virtqueue
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*
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* SPDX-FileCopyrightText: Red Hat, Inc. 2021
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* SPDX-FileContributor: Author: Eugenio Pérez <eperezma@redhat.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "qemu/osdep.h"
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#include "hw/virtio/vhost-shadow-virtqueue.h"
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#include "qemu/error-report.h"
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/**
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* Creates vhost shadow virtqueue, and instructs the vhost device to use the
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* shadow methods and file descriptors.
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*
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* Returns the new virtqueue or NULL.
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*
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* In case of error, reason is reported through error_report.
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*/
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VhostShadowVirtqueue *vhost_svq_new(void)
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{
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g_autofree VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
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int r;
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r = event_notifier_init(&svq->hdev_kick, 0);
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if (r != 0) {
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error_report("Couldn't create kick event notifier: %s (%d)",
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g_strerror(errno), errno);
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goto err_init_hdev_kick;
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}
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r = event_notifier_init(&svq->hdev_call, 0);
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if (r != 0) {
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error_report("Couldn't create call event notifier: %s (%d)",
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g_strerror(errno), errno);
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goto err_init_hdev_call;
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}
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return g_steal_pointer(&svq);
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err_init_hdev_call:
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event_notifier_cleanup(&svq->hdev_kick);
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err_init_hdev_kick:
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return NULL;
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}
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/**
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* Free the resources of the shadow virtqueue.
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*
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* @pvq: gpointer to SVQ so it can be used by autofree functions.
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*/
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void vhost_svq_free(gpointer pvq)
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{
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VhostShadowVirtqueue *vq = pvq;
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event_notifier_cleanup(&vq->hdev_kick);
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event_notifier_cleanup(&vq->hdev_call);
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g_free(vq);
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}
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