On Wed, Mar 24, 2021 at 2:35 PM Jason Wang <jasow...@redhat.com> wrote: > > > 在 2021/3/23 上午9:56, Cindy Lu 写道: > > Add call back function for configure interrupt. > > Set the notifier's fd to the kernel driver when vdpa start. > > also set -1 while vdpa stop. then the kernel will release > > the related resource > > > > Signed-off-by: Cindy Lu <l...@redhat.com> > > --- > > hw/virtio/trace-events | 2 ++ > > hw/virtio/vhost-vdpa.c | 40 +++++++++++++++++++++++++++++-- > > include/hw/virtio/vhost-backend.h | 4 ++++ > > 3 files changed, 44 insertions(+), 2 deletions(-) > > > > diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events > > index 2060a144a2..6710835b46 100644 > > --- a/hw/virtio/trace-events > > +++ b/hw/virtio/trace-events > > @@ -52,6 +52,8 @@ vhost_vdpa_set_vring_call(void *dev, unsigned int index, > > int fd) "dev: %p index: > > vhost_vdpa_get_features(void *dev, uint64_t features) "dev: %p features: > > 0x%"PRIx64 > > vhost_vdpa_set_owner(void *dev) "dev: %p" > > vhost_vdpa_vq_get_addr(void *dev, void *vq, uint64_t desc_user_addr, > > uint64_t avail_user_addr, uint64_t used_user_addr) "dev: %p vq: %p > > desc_user_addr: 0x%"PRIx64" avail_user_addr: 0x%"PRIx64" used_user_addr: > > 0x%"PRIx64 > > +vhost_vdpa_set_config_call(void *dev, int *fd)"dev: %p fd: %p" > > + > > > > # virtio.c > > virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned > > out_num) "elem %p size %zd in_num %u out_num %u" > > diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c > > index 01d2101d09..bde32eefe7 100644 > > --- a/hw/virtio/vhost-vdpa.c > > +++ b/hw/virtio/vhost-vdpa.c > > @@ -467,20 +467,47 @@ static int vhost_vdpa_get_config(struct vhost_dev > > *dev, uint8_t *config, > > } > > return ret; > > } > > - > > +static void vhost_vdpa_config_notify_start(struct vhost_dev *dev, > > + struct VirtIODevice *vdev, bool start) > > +{ > > + int fd = 0; > > + int r = 0; > > + if (!(dev->features & (0x1ULL << VIRTIO_NET_F_STATUS))) { > > + return; > > + } > > + if (start) { > > + fd = event_notifier_get_fd(&vdev->config_notifier); > > + r = dev->vhost_ops->vhost_set_config_call(dev, &fd); > > + /*set the fd call back to vdpa driver*/ > > + if (!r) { > > + vdev->use_config_notifier = VIRTIO_CONFIG_WORK; > > + event_notifier_set(&vdev->config_notifier); > > > Is this a workaround for the vdpa device without config interrupt? I > wonder how much we could gain from this. > this is a bit identify if the config notifier working now, this bit to check in virtio bus for different behavior , I will change this bit 's name to make it more clearly
> > > + info_report("vhost_vdpa_config_notify start!"); > > > This is a debug code I guess. > sure I will remove this > > > + } > > + } else { > > + fd = -1; > > + vdev->use_config_notifier = VIRTIO_CONFIG_STOP; > > > Looks like a duplicated state with vhost_dev->started? > > > > + r = dev->vhost_ops->vhost_set_config_call(dev, &fd); > > + } > > + return; > > +} > > static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) > > { > > struct vhost_vdpa *v = dev->opaque; > > trace_vhost_vdpa_dev_start(dev, started); > > + VirtIODevice *vdev = dev->vdev; > > + > > if (started) { > > uint8_t status = 0; > > memory_listener_register(&v->listener, &address_space_memory); > > vhost_vdpa_set_vring_ready(dev); > > vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); > > vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); > > - > > + /*set the configure interrupt call back*/ > > + vhost_vdpa_config_notify_start(dev, vdev, true); > > return !(status & VIRTIO_CONFIG_S_DRIVER_OK); > > } else { > > + vhost_vdpa_config_notify_start(dev, vdev, false); > > vhost_vdpa_reset_device(dev); > > vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | > > VIRTIO_CONFIG_S_DRIVER); > > @@ -546,6 +573,14 @@ static int vhost_vdpa_set_vring_call(struct vhost_dev > > *dev, > > return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file); > > } > > > > +static int vhost_vdpa_set_config_call(struct vhost_dev *dev, > > + int *fd) > > +{ > > + trace_vhost_vdpa_set_config_call(dev, fd); > > + > > + return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, fd); > > +} > > + > > static int vhost_vdpa_get_features(struct vhost_dev *dev, > > uint64_t *features) > > { > > @@ -611,4 +646,5 @@ const VhostOps vdpa_ops = { > > .vhost_get_device_id = vhost_vdpa_get_device_id, > > .vhost_vq_get_addr = vhost_vdpa_vq_get_addr, > > .vhost_force_iommu = vhost_vdpa_force_iommu, > > + .vhost_set_config_call = vhost_vdpa_set_config_call, > > }; > > diff --git a/include/hw/virtio/vhost-backend.h > > b/include/hw/virtio/vhost-backend.h > > index 8a6f8e2a7a..1a2fee8994 100644 > > --- a/include/hw/virtio/vhost-backend.h > > +++ b/include/hw/virtio/vhost-backend.h > > > A separated patch please. > > Thanks > sure will split this > > > @@ -125,6 +125,9 @@ typedef int (*vhost_get_device_id_op)(struct vhost_dev > > *dev, uint32_t *dev_id); > > > > typedef bool (*vhost_force_iommu_op)(struct vhost_dev *dev); > > > > +typedef int (*vhost_set_config_call_op)(struct vhost_dev *dev, > > + int *fd); > > + > > typedef struct VhostOps { > > VhostBackendType backend_type; > > vhost_backend_init vhost_backend_init; > > @@ -170,6 +173,7 @@ typedef struct VhostOps { > > vhost_vq_get_addr_op vhost_vq_get_addr; > > vhost_get_device_id_op vhost_get_device_id; > > vhost_force_iommu_op vhost_force_iommu; > > + vhost_set_config_call_op vhost_set_config_call; > > } VhostOps; > > > > extern const VhostOps user_ops; > >