From effdacbf28d76ca0eec9086539649e547e510bbc Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Wed, 9 Jul 2025 10:24:19 +0200 Subject: net: Consolidate vhost feature bits into vhost_net structure Previously, the vhost_net_get_feature_bits() function in hw/net/vhost_net.c used a large switch statement to determine the appropriate feature bits based on the NetClientDriver type. This created unnecessary coupling between the generic vhost layer and specific network backends (like TAP, vhost-user, and vhost-vdpa). This patch moves the definition of vhost feature bits directly into the vhost_net structure for each relevant network client. Signed-off-by: Laurent Vivier Signed-off-by: Jason Wang --- hw/net/vhost_net.c | 90 ++---------------------------------------------------- 1 file changed, 3 insertions(+), 87 deletions(-) (limited to 'hw') diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c index db8b97b..787c769 100644 --- a/hw/net/vhost_net.c +++ b/hw/net/vhost_net.c @@ -36,94 +36,9 @@ #include "hw/virtio/virtio-bus.h" #include "linux-headers/linux/vhost.h" - -/* Features supported by host kernel. */ -static const int kernel_feature_bits[] = { - VIRTIO_F_NOTIFY_ON_EMPTY, - VIRTIO_RING_F_INDIRECT_DESC, - VIRTIO_RING_F_EVENT_IDX, - VIRTIO_NET_F_MRG_RXBUF, - VIRTIO_F_VERSION_1, - VIRTIO_NET_F_MTU, - VIRTIO_F_IOMMU_PLATFORM, - VIRTIO_F_RING_PACKED, - VIRTIO_F_RING_RESET, - VIRTIO_F_IN_ORDER, - VIRTIO_F_NOTIFICATION_DATA, - VIRTIO_NET_F_RSC_EXT, - VIRTIO_NET_F_HASH_REPORT, - VHOST_INVALID_FEATURE_BIT -}; - -/* Features supported by others. */ -static const int user_feature_bits[] = { - VIRTIO_F_NOTIFY_ON_EMPTY, - VIRTIO_F_NOTIFICATION_DATA, - VIRTIO_RING_F_INDIRECT_DESC, - VIRTIO_RING_F_EVENT_IDX, - - VIRTIO_F_ANY_LAYOUT, - VIRTIO_F_VERSION_1, - VIRTIO_NET_F_CSUM, - VIRTIO_NET_F_GUEST_CSUM, - VIRTIO_NET_F_GSO, - VIRTIO_NET_F_GUEST_TSO4, - VIRTIO_NET_F_GUEST_TSO6, - VIRTIO_NET_F_GUEST_ECN, - VIRTIO_NET_F_GUEST_UFO, - VIRTIO_NET_F_HOST_TSO4, - VIRTIO_NET_F_HOST_TSO6, - VIRTIO_NET_F_HOST_ECN, - VIRTIO_NET_F_HOST_UFO, - VIRTIO_NET_F_MRG_RXBUF, - VIRTIO_NET_F_MTU, - VIRTIO_F_IOMMU_PLATFORM, - VIRTIO_F_RING_PACKED, - VIRTIO_F_RING_RESET, - VIRTIO_F_IN_ORDER, - VIRTIO_NET_F_RSS, - VIRTIO_NET_F_RSC_EXT, - VIRTIO_NET_F_HASH_REPORT, - VIRTIO_NET_F_GUEST_USO4, - VIRTIO_NET_F_GUEST_USO6, - VIRTIO_NET_F_HOST_USO, - - /* This bit implies RARP isn't sent by QEMU out of band */ - VIRTIO_NET_F_GUEST_ANNOUNCE, - - VIRTIO_NET_F_MQ, - - VHOST_INVALID_FEATURE_BIT -}; - -static const int *vhost_net_get_feature_bits(struct vhost_net *net) -{ - const int *feature_bits = 0; - - switch (net->nc->info->type) { - case NET_CLIENT_DRIVER_TAP: - feature_bits = kernel_feature_bits; - break; - case NET_CLIENT_DRIVER_VHOST_USER: - feature_bits = user_feature_bits; - break; -#ifdef CONFIG_VHOST_NET_VDPA - case NET_CLIENT_DRIVER_VHOST_VDPA: - feature_bits = vdpa_feature_bits; - break; -#endif - default: - error_report("Feature bits not defined for this type: %d", - net->nc->info->type); - break; - } - - return feature_bits; -} - uint64_t vhost_net_get_features(struct vhost_net *net, uint64_t features) { - return vhost_get_features(&net->dev, vhost_net_get_feature_bits(net), + return vhost_get_features(&net->dev, net->feature_bits, features); } int vhost_net_get_config(struct vhost_net *net, uint8_t *config, @@ -140,7 +55,7 @@ int vhost_net_set_config(struct vhost_net *net, const uint8_t *data, void vhost_net_ack_features(struct vhost_net *net, uint64_t features) { net->dev.acked_features = net->dev.backend_features; - vhost_ack_features(&net->dev, vhost_net_get_feature_bits(net), features); + vhost_ack_features(&net->dev, net->feature_bits, features); } uint64_t vhost_net_get_max_queues(VHostNetState *net) @@ -329,6 +244,7 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options) } net->nc = options->net_backend; net->dev.nvqs = options->nvqs; + net->feature_bits = options->feature_bits; net->dev.max_queues = 1; net->dev.vqs = net->vqs; -- cgit v1.1