search for: vhost_vdpa_backend_featur

...ct vhost_vring_state s; - u64 __user *featurep = argp; - u64 features; u32 idx; long r; @@ -381,18 +379,6 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, vq->last_avail_idx = vq_state.avail_index; break; - case VHOST_GET_BACKEND_FEATURES: - features = VHOST_VDPA_BACKEND_FEATURES; - if (copy_to_user(featurep, &features, sizeof(features))) - return -EFAULT; - return 0; - case VHOST_SET_BACKEND_FEATURES: - if (copy_from_user(&features, featurep, sizeof(features))) - return -EFAULT; - if (features & ~VHOST_VDPA_BACKEND_FEATURES) - return -EOPNOTSUPP; -...

...ct vhost_vring_state s; - u64 __user *featurep = argp; - u64 features; u32 idx; long r; @@ -381,18 +379,6 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, vq->last_avail_idx = vq_state.avail_index; break; - case VHOST_GET_BACKEND_FEATURES: - features = VHOST_VDPA_BACKEND_FEATURES; - if (copy_to_user(featurep, &features, sizeof(features))) - return -EFAULT; - return 0; - case VHOST_SET_BACKEND_FEATURES: - if (copy_from_user(&features, featurep, sizeof(features))) - return -EFAULT; - if (features & ~VHOST_VDPA_BACKEND_FEATURES) - return -EOPNOTSUPP; -...

...rgp; > - u64 features; > u32 idx; > long r; > > @@ -381,18 +379,6 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, > > vq->last_avail_idx = vq_state.avail_index; > break; > - case VHOST_GET_BACKEND_FEATURES: > - features = VHOST_VDPA_BACKEND_FEATURES; > - if (copy_to_user(featurep, &features, sizeof(features))) > - return -EFAULT; > - return 0; > - case VHOST_SET_BACKEND_FEATURES: > - if (copy_from_user(&features, featurep, sizeof(features))) > - return -EFAULT; > - if (features & ~VHOST_VDPA_BACKEND_F...

...rivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -344,6 +344,33 @@ static long vhost_vdpa_set_config_call(struct vhost_vdpa > *v, u32 __user *argp) > return 0; > } > > + > +static long vhost_vdpa_get_backend_features(void __user *argp) > +{ > + u64 features = VHOST_VDPA_BACKEND_FEATURES; > + u64 __user *featurep = argp; > + long r; > + > + r = copy_to_user(featurep, &features, sizeof(features)); > + > + return r; > +} > +static long vhost_vdpa_set_backend_features(struct vhost_vdpa *v, void > __user *argp) > +{ > + u64 __user *featurep = argp...

Hi all: This series tries to support batched IOTLB updating vhost-vdpa. Currently vhost-vdpa accepts userspace mapping via IOTLB API, and it can only forward one mapping to IOMMU or device through IOMMU API or dma_map(). Though set_map() is deisgend to have the capability to pass an rbtree based mapping to vDPA device, it's still be called at least once for each VHOST_IOTLB_UPDATE or

...> 3 files changed, 32 insertions(+), 7 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 453057421f80..8f624bbafee7 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -56,7 +56,9 @@ enum { > }; > > enum { > - VHOST_VDPA_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) > + VHOST_VDPA_BACKEND_FEATURES = > + (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) | > + (1ULL << VHOST_BACKEND_F_IOTLB_BATCH), > }; > > /* Currently, only network backend w/o multiqueue is supported. */ > @@ -77,6 +79,...

...> 3 files changed, 32 insertions(+), 7 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 453057421f80..8f624bbafee7 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -56,7 +56,9 @@ enum { > }; > > enum { > - VHOST_VDPA_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) > + VHOST_VDPA_BACKEND_FEATURES = > + (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) | > + (1ULL << VHOST_BACKEND_F_IOTLB_BATCH), > }; > > /* Currently, only network backend w/o multiqueue is supported. */ > @@ -77,6 +79,...

Hi all: This series tries to support batched IOTLB updating vhost-vdpa. Currently vhost-vdpa accepts userspace mapping via IOTLB API, and it can only forward one mapping to IOMMU or device through IOMMU API or dma_map(). Though set_map() is designed to have the capability to pass an rbtree based mapping to vDPA device, it's still be called at least once for each VHOST_IOTLB_UPDATE or

...t; diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > > > index 453057421f80..8f624bbafee7 100644 > > > --- a/drivers/vhost/vdpa.c > > > +++ b/drivers/vhost/vdpa.c > > > @@ -56,7 +56,9 @@ enum { > > > }; > > > enum { > > > - VHOST_VDPA_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) > > > + VHOST_VDPA_BACKEND_FEATURES = > > > + (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) | > > > + (1ULL << VHOST_BACKEND_F_IOTLB_BATCH), > > > }; > > > /* Currently, only network backend w/o m...

...| 2 ++ include/uapi/linux/vhost_types.h | 7 +++++++ 3 files changed, 32 insertions(+), 7 deletions(-) diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 453057421f80..8f624bbafee7 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -56,7 +56,9 @@ enum { }; enum { - VHOST_VDPA_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) + VHOST_VDPA_BACKEND_FEATURES = + (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) | + (1ULL << VHOST_BACKEND_F_IOTLB_BATCH), }; /* Currently, only network backend w/o multiqueue is supported. */ @@ -77,6 +79,7 @@ struct vhost_vdpa { int virt...

...7 deletions(-) >> >> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c >> index 453057421f80..8f624bbafee7 100644 >> --- a/drivers/vhost/vdpa.c >> +++ b/drivers/vhost/vdpa.c >> @@ -56,7 +56,9 @@ enum { >> }; >> >> enum { >> - VHOST_VDPA_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) >> + VHOST_VDPA_BACKEND_FEATURES = >> + (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2) | >> + (1ULL << VHOST_BACKEND_F_IOTLB_BATCH), >> }; >> >> /* Currently, only network backend w/o multiqueue is suppo...

...it checkout f2da8fc35b4ef003de7d559a8c7730fedf9926f8 vim +356 drivers/vhost/vdpa.c f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 348 static long vhost_vdpa_get_backend_features(void __user *argp) f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 349 { f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 350 u64 features = VHOST_VDPA_BACKEND_FEATURES; f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 351 u64 __user *featurep = argp; f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 352 long r; f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 353 f2da8fc35b4ef0 Zhu Lingshan 2020-09-09 354 r = copy_to_user(featurep, &features, sizeof(features)); f2da8fc35b4ef0...

...g r = 0; > > if (cmd == VHOST_SET_BACKEND_FEATURES) { > if (copy_from_user(&features, featurep, sizeof(features))) > return -EFAULT; > + if (ops->get_backend_features) > + parent_features = ops->get_backend_features(v->vdpa); > if (features & ~(VHOST_VDPA_BACKEND_FEATURES | > BIT_ULL(VHOST_BACKEND_F_SUSPEND) | > BIT_ULL(VHOST_BACKEND_F_RESUME) | > - BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK))) > + parent_features)) > return -EOPNOTSUPP; > if ((features & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) && >...

...vhost_vdpa_get_features(struct vhost_vdpa *v, u64 __user *featurep) { struct vdpa_device *vdpa = v->vdpa; @@ -679,6 +687,7 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, if (copy_from_user(&features, featurep, sizeof(features))) return -EFAULT; if (features & ~(VHOST_VDPA_BACKEND_FEATURES | + BIT_ULL(VHOST_BACKEND_F_DESC_ASID) | BIT_ULL(VHOST_BACKEND_F_SUSPEND) | BIT_ULL(VHOST_BACKEND_F_RESUME))) return -EOPNOTSUPP; @@ -688,6 +697,12 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, if ((features & BIT_ULL(VHOST_BACKEND_F_RESUME)) &&...

...atures, featurep, sizeof(features))) > > > return -EFAULT; > > > + if (ops->get_backend_features) > > > + parent_features = ops->get_backend_features(v->vdpa); > > > if (features & ~(VHOST_VDPA_BACKEND_FEATURES | > > > BIT_ULL(VHOST_BACKEND_F_SUSPEND) | > > > BIT_ULL(VHOST_BACKEND_F_RESUME) | > > > - BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK))) > > > +...

Hi All: This series tries to add the support for control virtqueue in vDPA. Control virtqueue is used by networking device for accepting various commands from the driver. It's a must to support multiqueue and other configurations. When used by vhost-vDPA bus driver for VM, the control virtqueue should be shadowed via userspace VMM (Qemu) instead of being assigned directly to Guest. This is

Hi All: This series tries to add the support for control virtqueue in vDPA. Control virtqueue is used by networking device for accepting various commands from the driver. It's a must to support multiqueue and other configurations. When used by vhost-vDPA bus driver for VM, the control virtqueue should be shadowed via userspace VMM (Qemu) instead of being assigned directly to Guest. This is

...; > > > > return -EFAULT; > > > > > + if (ops->get_backend_features) > > > > > + parent_features = ops->get_backend_features(v->vdpa); > > > > > if (features & ~(VHOST_VDPA_BACKEND_FEATURES | > > > > > BIT_ULL(VHOST_BACKEND_F_SUSPEND) | > > > > > BIT_ULL(VHOST_BACKEND_F_RESUME) | > > > > > - BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK))) > &gt...

Following patchset introduces dedicated group for descriptor table to reduce live migration downtime when passthrough VQ is being switched to shadow VQ. This RFC v2 is sent to incorporate the early feedback from reviewers on the uAPI and driver API part of changes, the associated driver patch set consuming ths API will come around soon along with formal submission of this series. Some initial

In order to reduce needlessly high setup and teardown cost of iotlb mapping during live migration, it's crucial to decouple the vhost-vdpa iotlb abstraction from the virtio device life cycle, i.e. iotlb mappings should be left intact across virtio device reset [1]. For it to work, the on-chip IOMMU parent device should implement a separate .reset_map() operation callback to restore 1:1 DMA