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[PATCH v10 06/10] virtio: add support for configure interrupt
From: |
Cindy Lu |
Subject: |
[PATCH v10 06/10] virtio: add support for configure interrupt |
Date: |
Fri, 5 Nov 2021 00:48:23 +0800 |
Add the functions to support the configure interrupt in virtio
The function virtio_config_guest_notifier_read will notify the
guest if there is an configure interrupt.
The function virtio_config_set_guest_notifier_fd_handler is
to set the fd hander for the notifier
Signed-off-by: Cindy Lu <lulu@redhat.com>
---
hw/virtio/virtio.c | 29 +++++++++++++++++++++++++++++
include/hw/virtio/virtio.h | 4 ++++
2 files changed, 33 insertions(+)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index cc69a9b881..0aab3ea1df 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3499,7 +3499,14 @@ static void
virtio_queue_guest_notifier_read(EventNotifier *n)
virtio_irq(vq);
}
}
+static void virtio_config_guest_notifier_read(EventNotifier *n)
+{
+ VirtIODevice *vdev = container_of(n, VirtIODevice, config_notifier);
+ if (event_notifier_test_and_clear(n)) {
+ virtio_notify_config(vdev);
+ }
+}
void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
bool with_irqfd)
{
@@ -3516,6 +3523,23 @@ void
virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
}
}
+void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
+ bool assign, bool with_irqfd)
+{
+ EventNotifier *n;
+ n = &vdev->config_notifier;
+ if (assign && !with_irqfd) {
+ event_notifier_set_handler(n, virtio_config_guest_notifier_read);
+ } else {
+ event_notifier_set_handler(n, NULL);
+ }
+ if (!assign) {
+ /* Test and clear notifier before closing it,*/
+ /* in case poll callback didn't have time to run. */
+ virtio_config_guest_notifier_read(n);
+ }
+}
+
EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq)
{
return &vq->guest_notifier;
@@ -3589,6 +3613,11 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue
*vq)
return &vq->host_notifier;
}
+EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev)
+{
+ return &vdev->config_notifier;
+}
+
void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled)
{
vq->host_notifier_enabled = enabled;
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 605ea79c90..d78088d872 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -111,6 +111,7 @@ struct VirtIODevice
bool use_guest_notifier_mask;
AddressSpace *dma_as;
QLIST_HEAD(, VirtQueue) *vector_queues;
+ EventNotifier config_notifier;
};
struct VirtioDeviceClass {
@@ -313,11 +314,14 @@ uint16_t virtio_get_queue_index(VirtQueue *vq);
EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
bool with_irqfd);
+void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
+ bool assign, bool with_irqfd);
int virtio_device_start_ioeventfd(VirtIODevice *vdev);
int virtio_device_grab_ioeventfd(VirtIODevice *vdev);
void virtio_device_release_ioeventfd(VirtIODevice *vdev);
bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
+EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev);
void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
void virtio_queue_host_notifier_read(EventNotifier *n);
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
--
2.21.3
- [PATCH v10 00/10]vhost-vdpa: add support for configure interrupt, Cindy Lu, 2021/11/04
- [PATCH v10 01/10] virtio: introduce macro IRTIO_CONFIG_IRQ_IDX, Cindy Lu, 2021/11/04
- [PATCH v10 02/10] virtio-pci: decouple notifier from interrupt process, Cindy Lu, 2021/11/04
- [PATCH v10 03/10] virtio-pci: decouple the single vector from the interrupt process, Cindy Lu, 2021/11/04
- [PATCH v10 04/10] vhost: introduce new VhostOps vhost_set_config_call, Cindy Lu, 2021/11/04
- [PATCH v10 05/10] vhost-vdpa: add support for config interrupt, Cindy Lu, 2021/11/04
- [PATCH v10 06/10] virtio: add support for configure interrupt,
Cindy Lu <=
- [PATCH v10 08/10] virtio-net: add support for configure interrupt, Cindy Lu, 2021/11/04
- [PATCH v10 07/10] vhost: add support for configure interrupt, Cindy Lu, 2021/11/04
- [PATCH v10 09/10] virtio-mmio: add support for configure interrupt, Cindy Lu, 2021/11/04
- [PATCH v10 10/10] virtio-pci: add support for configure interrupt, Cindy Lu, 2021/11/04
- Re: [PATCH v10 00/10]vhost-vdpa: add support for configure interrupt, Michael S. Tsirkin, 2021/11/07
- Re: [PATCH v10 00/10]vhost-vdpa: add support for configure interrupt, Stefan Hajnoczi, 2021/11/08