search for: vhost_update_device_flags

...int ret; > > - /* FIXME: disable notification through device area */ > + if (!(vq->used_flags & VRING_USED_F_NO_NOTIFY)) > + return false; > + vq->used_flags &= ~VRING_USED_F_NO_NOTIFY; > + > + flags = cpu_to_vhost16(vq, RING_EVENT_FLAGS_ENABLE); > + ret = vhost_update_device_flags(vq, flags); > + if (ret) { > + vq_err(vq, "Failed to enable notification at %p: %d\n", > + &vq->device_event->desc_event_flags, ret); > + return false; > + } > > /* They could have slipped one in as we were doing that: make > * sure it...

...e(vq, VIRTIO_F_RING_PACKED)) + return vq_iotlb_prefetch_packed(vq); + else + return vq_iotlb_prefetch_split(vq); +} EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); /* Can we log writes? */ @@ -1724,6 +1753,29 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) return 0; } +static int vhost_update_device_flags(struct vhost_virtqueue *vq, + __virtio16 device_flags) +{ + void __user *flags; + + if (vhost_put_user(vq, cpu_to_vhost16(vq, device_flags), + &vq->device_event->flags, + VHOST_ADDR_USED) < 0) + return -EFAULT; + if (unlikely(vq->log_used)) { + /* Make sure the f...

...e(vq, VIRTIO_F_RING_PACKED)) + return vq_iotlb_prefetch_packed(vq); + else + return vq_iotlb_prefetch_split(vq); +} EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); /* Can we log writes? */ @@ -1756,6 +1785,29 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) return 0; } +static int vhost_update_device_flags(struct vhost_virtqueue *vq, + __virtio16 device_flags) +{ + void __user *flags; + + if (vhost_put_user(vq, cpu_to_vhost16(vq, device_flags), + &vq->device_event->desc_event_flags, + VHOST_ADDR_DESC) < 0) + return -EFAULT; + if (unlikely(vq->log_used)) { + /* Make...

...e(vq, VIRTIO_F_RING_PACKED)) + return vq_iotlb_prefetch_packed(vq); + else + return vq_iotlb_prefetch_split(vq); +} EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); /* Can we log writes? */ @@ -1771,6 +1800,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) return 0; } +static int vhost_update_device_flags(struct vhost_virtqueue *vq, + __virtio16 device_flags) +{ + void __user *flags; + + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, + VHOST_ADDR_USED) < 0) + return -EFAULT; + if (unlikely(vq->log_used)) { + /* Make sure the flag is seen before log. */...

...e(vq, VIRTIO_F_RING_PACKED)) + return vq_iotlb_prefetch_packed(vq); + else + return vq_iotlb_prefetch_split(vq); +} EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); /* Can we log writes? */ @@ -1730,6 +1759,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) return 0; } +static int vhost_update_device_flags(struct vhost_virtqueue *vq, + __virtio16 device_flags) +{ + void __user *flags; + + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, + VHOST_ADDR_USED) < 0) + return -EFAULT; + if (unlikely(vq->log_used)) { + /* Make sure the flag is seen before log. */...

...h_packed(vq); > + else > + return vq_iotlb_prefetch_split(vq); > +} > EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); > > /* Can we log writes? */ > @@ -1730,6 +1759,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) > return 0; > } > > +static int vhost_update_device_flags(struct vhost_virtqueue *vq, > + __virtio16 device_flags) > +{ > + void __user *flags; > + > + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, > + VHOST_ADDR_USED) < 0) > + return -EFAULT; > + if (unlikely(vq->log_used)) { > +...

...h_packed(vq); > + else > + return vq_iotlb_prefetch_split(vq); > +} > EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); > > /* Can we log writes? */ > @@ -1730,6 +1759,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) > return 0; > } > > +static int vhost_update_device_flags(struct vhost_virtqueue *vq, > + __virtio16 device_flags) > +{ > + void __user *flags; > + > + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, > + VHOST_ADDR_USED) < 0) > + return -EFAULT; > + if (unlikely(vq->log_used)) { > +...

...h_packed(vq); > + else > + return vq_iotlb_prefetch_split(vq); > +} > EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); > > /* Can we log writes? */ > @@ -1771,6 +1800,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) > return 0; > } > > +static int vhost_update_device_flags(struct vhost_virtqueue *vq, > + __virtio16 device_flags) > +{ > + void __user *flags; > + > + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, > + VHOST_ADDR_USED) < 0) > + return -EFAULT; > + if (unlikely(vq->log_used)) { > +...

...h_packed(vq); > + else > + return vq_iotlb_prefetch_split(vq); > +} > EXPORT_SYMBOL_GPL(vq_iotlb_prefetch); > > /* Can we log writes? */ > @@ -1771,6 +1800,50 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) > return 0; > } > > +static int vhost_update_device_flags(struct vhost_virtqueue *vq, > + __virtio16 device_flags) > +{ > + void __user *flags; > + > + if (vhost_put_user(vq, device_flags, &vq->device_event->flags, > + VHOST_ADDR_USED) < 0) > + return -EFAULT; > + if (unlikely(vq->log_used)) { > +...

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V5 at https://lkml.org/lkml/2018/5/22/138. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on TX PPS when doing pktgen from guest to host. No ovbious improvement on RX PPS. We can do lots of optimizations on top but for simple

Hi all: This RFC implement packed ring layout. The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost and guest. Testpmd (rxonly) in guest reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. Notes: The event

Hi all: This RFC implement packed ring layout. The code were tested with pmd implement by Jens at http://dpdk.org/ml/archives/dev/2018-January/089417.html. Minor change was needed for pmd codes to kick virtqueue since it assumes a busy polling backend. Test were done between localhost and guest. Testpmd (rxonly) in guest reports 2.4Mpps. Testpmd (txonly) repots about 2.1Mpps. Notes: The event

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's RFC V6 at https://lkml.org/lkml/2018/6/5/120. Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test virtio-net pmd as well when

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's RFC V6 at https://lkml.org/lkml/2018/6/5/120. Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test virtio-net pmd as well when

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V3 ahttps://lkml.org/lkml/2018/4/25/34. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on PPS (event index is off). More testing is ongoing. Notes for tester: - Start from this version, vhost need qemu co-operation to work

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V3 ahttps://lkml.org/lkml/2018/4/25/34. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on PPS (event index is off). More testing is ongoing. Notes for tester: - Start from this version, vhost need qemu co-operation to work

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V2 a thttps://lkml.org/lkml/2018/4/1/48. Some fixups and tweaks were needed on top of Tiwei's code to make it run. TCP stream and pktgen does not show obvious difference compared with split ring. Changes from V2: - do not use & in checking desc_event_flags - off should be most significant bit -

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V2 a thttps://lkml.org/lkml/2018/4/1/48. Some fixups and tweaks were needed on top of Tiwei's code to make it run. TCP stream and pktgen does not show obvious difference compared with split ring. Changes from V2: - do not use & in checking desc_event_flags - off should be most significant bit -

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's guest driver series at https://patchwork.ozlabs.org/cover/942297/ Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test

Hi all: This series implements packed virtqueues. The code were tested with Tiwei's guest driver series at https://patchwork.ozlabs.org/cover/942297/ Pktgen test for both RX and TX does not show obvious difference with split virtqueues. The main bottleneck is the guest Linux driver, since it can not stress vhost for a 100% CPU utilization. A full TCP benchmark is ongoing. Will test