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[RFC 01/10] virtio: Add virtqueue_set_handler
From: |
Eugenio Pérez |
Subject: |
[RFC 01/10] virtio: Add virtqueue_set_handler |
Date: |
Fri, 29 Jan 2021 21:54:06 +0100 |
This allows qemu to override vq handler.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
include/hw/virtio/virtio.h | 6 +++---
hw/virtio/virtio.c | 14 ++++++++++++++
2 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index b7ece7a6a8..9b5479e256 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -47,6 +47,8 @@ size_t virtio_feature_get_config_size(VirtIOFeature *features,
uint64_t host_features);
typedef struct VirtQueue VirtQueue;
+typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *);
+typedef bool (*VirtIOHandleAIOOutput)(VirtIODevice *, VirtQueue *);
#define VIRTQUEUE_MAX_SIZE 1024
@@ -174,9 +176,6 @@ void virtio_error(VirtIODevice *vdev, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
/* Set the child bus name. */
void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name);
-typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *);
-typedef bool (*VirtIOHandleAIOOutput)(VirtIODevice *, VirtQueue *);
-
VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
VirtIOHandleOutput handle_output);
@@ -184,6 +183,7 @@ void virtio_del_queue(VirtIODevice *vdev, int n);
void virtio_delete_queue(VirtQueue *vq);
+void virtqueue_set_handler(VirtQueue *vq, VirtIOHandleOutput handler);
void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
unsigned int len);
void virtqueue_flush(VirtQueue *vq, unsigned int count);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index b308026596..ebb780fb42 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1796,6 +1796,20 @@ unsigned int virtqueue_drop_all(VirtQueue *vq)
}
}
+/*
+ * virtqueue_set_handler:
+ * @vq The #VirtQueue
+ * @handler The handler to call on vq event
+ * Replaces vq handler.
+ *
+ * Note: It takes no protection, so make sure no other calls to the handler
+ * are happening.
+ */
+void virtqueue_set_handler(VirtQueue *vq, VirtIOHandleOutput handler)
+{
+ vq->handle_output = handler;
+}
+
/* Reading and writing a structure directly to QEMUFile is *awful*, but
* it is what QEMU has always done by mistake. We can change it sooner
* or later by bumping the version number of the affected vm states.
--
2.27.0
- [RFC 00/10] vDPA shadow virtqueue - notifications forwarding, Eugenio Pérez, 2021/01/29
- [RFC 01/10] virtio: Add virtqueue_set_handler,
Eugenio Pérez <=
- [RFC 02/10] virtio: Add set_vq_handler, Eugenio Pérez, 2021/01/29
- [RFC 03/10] virtio: Add virtio_queue_get_idx, Eugenio Pérez, 2021/01/29
- [RFC 04/10] virtio: Add virtio_queue_host_notifier_status, Eugenio Pérez, 2021/01/29
- [RFC 05/10] vhost: Add vhost_dev_from_virtio, Eugenio Pérez, 2021/01/29
- [RFC 07/10] vhost: Add VhostShadowVirtqueue, Eugenio Pérez, 2021/01/29
- [RFC 06/10] vhost: Save masked_notifier state, Eugenio Pérez, 2021/01/29
- [RFC 08/10] vhost: Add x-vhost-enable-shadow-vq qmp, Eugenio Pérez, 2021/01/29
- [RFC 10/10] vhost: Route host->guest notification through shadow virtqueue, Eugenio Pérez, 2021/01/29
- [RFC 09/10] vhost: Route guest->host notification through shadow virtqueue, Eugenio Pérez, 2021/01/29