hw/virtio/virtio.h

10  * the COPYING file in the top-level directory.
18 #include "hw/qdev-core.h"
22 #include "standard-headers/linux/virtio_config.h"
23 #include "standard-headers/linux/virtio_ring.h"
29  * between the driver frontend and the device. This bit is re-used for
30  * vhost-user to advertise VHOST_USER_F_PROTOCOL_FEATURES between QEMU
31  * and a vhost-user backend.
85 #define VIRTIO_CONFIG_IRQ_IDX -1
87 #define TYPE_VIRTIO_DEVICE "virtio-device"
102  * struct VirtIODevice - common VirtIO structure
121      * backend (e.g. vhost) and could potentially be a subset of the
139     bool use_disabled_flag; /* allow use of 'disable' flag when needed */
157      * @user_guest_notifier_mask: gate usage of ->guest_notifier_mask() callback.
159      * vhost-user devices which are asynchronous by design.
228     /* May be called even when vdev->vhost_started is false */
237  * virtio_init() - initialise the common VirtIODevice structure
304  * virtio_notify_config() - signal a change to device config
452     return virtio_has_feature(vdev->guest_features, fbit);  in virtio_vdev_has_feature()
458     return virtio_has_feature(vdev->host_features, fbit);  in virtio_host_has_feature()
464         assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN);  in virtio_is_big_endian()
465         return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG;  in virtio_is_big_endian()
472  * virtio_device_started() - check if device started
473  * @vdev - the VirtIO device
474  * @status - the devices status bits
477  * tracked via the @vdev->started field (to support migration),
483     if (vdev->use_started) {  in virtio_device_started()
484         return vdev->started;  in virtio_device_started()
491  * virtio_device_should_start() - check if device startable
492  * @vdev - the VirtIO device
493  * @status - the devices status bits
495  * This is similar to virtio_device_started() but ignores vdev->started
501     if (!vdev->vm_running) {  in virtio_device_should_start()
511         vdev->start_on_kick = false;  in virtio_set_started()
514     if (vdev->use_started) {  in virtio_set_started()
515         vdev->started = started;  in virtio_set_started()
519 static inline void virtio_set_disabled(VirtIODevice *vdev, bool disable)  in virtio_set_disabled()  argument
521     if (vdev->use_disabled_flag) {  in virtio_set_disabled()
522         vdev->disabled = disable;  in virtio_set_disabled()
528     return unlikely(vdev->disabled || vdev->broken);  in virtio_device_disabled()