hw/virtio/virtio.h

10  * the COPYING file in the top-level directory.
18 #include "hw/qdev-core.h"
19 #include "net/net.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.
234     /* May be called even when vdev->vhost_started is false */
243  * virtio_init() - initialise the common VirtIODevice structure
310  * virtio_notify_config() - signal a change to device config
458     return virtio_has_feature(vdev->guest_features, fbit);  in virtio_vdev_has_feature()
464     return virtio_has_feature(vdev->host_features, fbit);  in virtio_host_has_feature()
470         assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN);  in virtio_is_big_endian()
471         return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG;  in virtio_is_big_endian()
478  * virtio_device_started() - check if device started
479  * @vdev - the VirtIO device
480  * @status - the devices status bits
483  * tracked via the @vdev->started field (to support migration),
489     if (vdev->use_started) {  in virtio_device_started()
490         return vdev->started;  in virtio_device_started()
497  * virtio_device_should_start() - check if device startable
498  * @vdev - the VirtIO device
499  * @status - the devices status bits
501  * This is similar to virtio_device_started() but ignores vdev->started
507     if (!vdev->vm_running) {  in virtio_device_should_start()
517         vdev->start_on_kick = false;  in virtio_set_started()
520     if (vdev->use_started) {  in virtio_set_started()
521         vdev->started = started;  in virtio_set_started()
525 static inline void virtio_set_disabled(VirtIODevice *vdev, bool disable)  in virtio_set_disabled()  argument
527     if (vdev->use_disabled_flag) {  in virtio_set_disabled()
528         vdev->disabled = disable;  in virtio_set_disabled()
534     return unlikely(vdev->disabled || vdev->broken);  in virtio_device_disabled()