The virtio spec already supports the virtio queue reset function. This patch set is to add this function to the kernel. The relevant virtio spec information is here: https://github.com/oasis-tcs/virtio-spec/issues/124 Also regarding MMIO support for queue reset, I plan to support it after this patch is passed. Performing reset on a queue is divided into four steps: 1. reset_vq: reset one vq 2. recycle the buffer from vq by virtqueue_detach_unused_buf() 3. release the ring of the vq by vring_release_virtqueue() 4. enable_reset_vq: re-enable the reset queue #2-#8 : virtio ring support re-enable reset queue and release vring #9-#14 : virtio PCI support reset queue and re-enable #15 : add queue reset helper #16-#17: virtio-net support rx, tx reset #18-#22: virtio-net support set ringparam Please review. Thanks. v5: 1. add virtio-net support set_ringparam v4: 1. just the code of virtio, without virtio-net 2. Performing reset on a queue is divided into these steps: 1. reset_vq: reset one vq 2. recycle the buffer from vq by virtqueue_detach_unused_buf() 3. release the ring of the vq by vring_release_virtqueue() 4. enable_reset_vq: re-enable the reset queue 3. Simplify the parameters of enable_reset_vq() 4. add container structures for virtio_pci_common_cfg v3: 1. keep vq, irq unreleased Xuan Zhuo (22): virtio_pci: struct virtio_pci_common_cfg add queue_notify_data virtio: queue_reset: add VIRTIO_F_RING_RESET virtio_ring: queue_reset: add function vring_setup_virtqueue() virtio_ring: queue_reset: split: add __vring_init_virtqueue() virtio_ring: queue_reset: split: support enable reset queue virtio_ring: queue_reset: packed: support enable reset queue virtio_ring: queue_reset: extract the release function of the vq ring virtio_ring: queue_reset: add vring_release_virtqueue() virtio: queue_reset: struct virtio_config_ops add callbacks for queue_reset virtio_pci: queue_reset: update struct virtio_pci_common_cfg and option functions virtio_pci: queue_reset: release vq by vp_dev->vqs virtio_pci: queue_reset: setup_vq() support vring_setup_virtqueue() virtio_pci: queue_reset: reserve vq->priv for re-enable queue virtio_pci: queue_reset: support VIRTIO_F_RING_RESET virtio: queue_reset: add helper virtio_net: split free_unused_bufs() virtio_net: support rx/tx queue reset virtio: add helper virtqueue_get_vring_max_size() virtio: add helper virtio_set_max_ring_num() virtio_net: set the default max ring num virtio_net: get max ring size by virtqueue_get_vring_max_size() virtio_net: support set_ringparam drivers/net/virtio_net.c | 238 ++++++++++++++++++++++--- drivers/virtio/virtio_mmio.c | 2 + drivers/virtio/virtio_pci_common.c | 61 +++++-- drivers/virtio/virtio_pci_common.h | 10 +- drivers/virtio/virtio_pci_legacy.c | 6 +- drivers/virtio/virtio_pci_modern.c | 82 ++++++++- drivers/virtio/virtio_pci_modern_dev.c | 36 ++++ drivers/virtio/virtio_ring.c | 193 +++++++++++++++----- include/linux/virtio.h | 15 ++ include/linux/virtio_config.h | 82 +++++++++ include/linux/virtio_pci_modern.h | 2 + include/linux/virtio_ring.h | 37 ++-- include/uapi/linux/virtio_config.h | 7 +- include/uapi/linux/virtio_pci.h | 14 ++ 14 files changed, 668 insertions(+), 117 deletions(-) -- 2.31.0 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization