Hi Rob, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on c39cea6f38eefe356d64d0bc1e1f2267e282cdd3] url: https://github.com/intel-lab-lkp/linux/commits/Rob-Bradford-via-B4-Relay/virtio-net-Fix-probe-of-virtio-net-on-kvmtool/20230224-011509 base: c39cea6f38eefe356d64d0bc1e1f2267e282cdd3 patch link: https://lore.kernel.org/r/20230223-virtio-net-kvmtool-v1-1-fc23d29b9d7a%40rivosinc.com patch subject: [PATCH] virtio-net: Fix probe of virtio-net on kvmtool config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230224/202302240220.zJZ4uyZI-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/c778354a380764fd994634e06be5c8047591d138 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Rob-Bradford-via-B4-Relay/virtio-net-Fix-probe-of-virtio-net-on-kvmtool/20230224-011509 git checkout c778354a380764fd994634e06be5c8047591d138 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302240220.zJZ4uyZI-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/net/virtio_net.c: In function 'virtnet_probe': >> drivers/net/virtio_net.c:3784:63: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 3784 | virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) && | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~ 3785 | virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +3784 drivers/net/virtio_net.c 3719 3720 static int virtnet_probe(struct virtio_device *vdev) 3721 { 3722 int i, err = -ENOMEM; 3723 struct net_device *dev; 3724 struct virtnet_info *vi; 3725 u16 max_queue_pairs; 3726 int mtu = 0; 3727 3728 /* Find if host supports multiqueue/rss virtio_net device */ 3729 max_queue_pairs = 1; 3730 if (virtio_has_feature(vdev, VIRTIO_NET_F_MQ) || virtio_has_feature(vdev, VIRTIO_NET_F_RSS)) 3731 max_queue_pairs = 3732 virtio_cread16(vdev, offsetof(struct virtio_net_config, max_virtqueue_pairs)); 3733 3734 /* We need at least 2 queue's */ 3735 if (max_queue_pairs < VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN || 3736 max_queue_pairs > VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX || 3737 !virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) 3738 max_queue_pairs = 1; 3739 3740 /* Allocate ourselves a network device with room for our info */ 3741 dev = alloc_etherdev_mq(sizeof(struct virtnet_info), max_queue_pairs); 3742 if (!dev) 3743 return -ENOMEM; 3744 3745 /* Set up network device as normal. */ 3746 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE | 3747 IFF_TX_SKB_NO_LINEAR; 3748 dev->netdev_ops = &virtnet_netdev; 3749 dev->features = NETIF_F_HIGHDMA; 3750 3751 dev->ethtool_ops = &virtnet_ethtool_ops; 3752 SET_NETDEV_DEV(dev, &vdev->dev); 3753 3754 /* Do we support "hardware" checksums? */ 3755 if (virtio_has_feature(vdev, VIRTIO_NET_F_CSUM)) { 3756 /* This opens up the world of extra features. */ 3757 dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_SG; 3758 if (csum) 3759 dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG; 3760 3761 if (virtio_has_feature(vdev, VIRTIO_NET_F_GSO)) { 3762 dev->hw_features |= NETIF_F_TSO 3763 | NETIF_F_TSO_ECN | NETIF_F_TSO6; 3764 } 3765 /* Individual feature bits: what can host handle? */ 3766 if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO4)) 3767 dev->hw_features |= NETIF_F_TSO; 3768 if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_TSO6)) 3769 dev->hw_features |= NETIF_F_TSO6; 3770 if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_ECN)) 3771 dev->hw_features |= NETIF_F_TSO_ECN; 3772 if (virtio_has_feature(vdev, VIRTIO_NET_F_HOST_USO)) 3773 dev->hw_features |= NETIF_F_GSO_UDP_L4; 3774 3775 dev->features |= NETIF_F_GSO_ROBUST; 3776 3777 if (gso) 3778 dev->features |= dev->hw_features & NETIF_F_ALL_TSO; 3779 /* (!csum && gso) case will be fixed by register_netdev() */ 3780 } 3781 if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM)) 3782 dev->features |= NETIF_F_RXCSUM; 3783 if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || > 3784 virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6) && 3785 virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) 3786 dev->hw_features |= NETIF_F_GRO_HW; 3787 3788 dev->vlan_features = dev->features; 3789 3790 /* MTU range: 68 - 65535 */ 3791 dev->min_mtu = MIN_MTU; 3792 dev->max_mtu = MAX_MTU; 3793 3794 /* Configuration may specify what MAC to use. Otherwise random. */ 3795 if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) { 3796 u8 addr[ETH_ALEN]; 3797 3798 virtio_cread_bytes(vdev, 3799 offsetof(struct virtio_net_config, mac), 3800 addr, ETH_ALEN); 3801 eth_hw_addr_set(dev, addr); 3802 } else { 3803 eth_hw_addr_random(dev); 3804 } 3805 3806 /* Set up our device-specific information */ 3807 vi = netdev_priv(dev); 3808 vi->dev = dev; 3809 vi->vdev = vdev; 3810 vdev->priv = vi; 3811 3812 INIT_WORK(&vi->config_work, virtnet_config_changed_work); 3813 spin_lock_init(&vi->refill_lock); 3814 3815 if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) 3816 vi->mergeable_rx_bufs = true; 3817 3818 if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_NOTF_COAL)) { 3819 vi->rx_usecs = 0; 3820 vi->tx_usecs = 0; 3821 vi->tx_max_packets = 0; 3822 vi->rx_max_packets = 0; 3823 } 3824 3825 if (virtio_has_feature(vdev, VIRTIO_NET_F_HASH_REPORT)) 3826 vi->has_rss_hash_report = true; 3827 3828 if (virtio_has_feature(vdev, VIRTIO_NET_F_RSS)) 3829 vi->has_rss = true; 3830 3831 if (vi->has_rss || vi->has_rss_hash_report) { 3832 vi->rss_indir_table_size = 3833 virtio_cread16(vdev, offsetof(struct virtio_net_config, 3834 rss_max_indirection_table_length)); 3835 vi->rss_key_size = 3836 virtio_cread8(vdev, offsetof(struct virtio_net_config, rss_max_key_size)); 3837 3838 vi->rss_hash_types_supported = 3839 virtio_cread32(vdev, offsetof(struct virtio_net_config, supported_hash_types)); 3840 vi->rss_hash_types_supported &= 3841 ~(VIRTIO_NET_RSS_HASH_TYPE_IP_EX | 3842 VIRTIO_NET_RSS_HASH_TYPE_TCP_EX | 3843 VIRTIO_NET_RSS_HASH_TYPE_UDP_EX); 3844 3845 dev->hw_features |= NETIF_F_RXHASH; 3846 } 3847 3848 if (vi->has_rss_hash_report) 3849 vi->hdr_len = sizeof(struct virtio_net_hdr_v1_hash); 3850 else if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) || 3851 virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) 3852 vi->hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); 3853 else 3854 vi->hdr_len = sizeof(struct virtio_net_hdr); 3855 3856 if (virtio_has_feature(vdev, VIRTIO_F_ANY_LAYOUT) || 3857 virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) 3858 vi->any_header_sg = true; 3859 3860 if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ)) 3861 vi->has_cvq = true; 3862 3863 if (virtio_has_feature(vdev, VIRTIO_NET_F_MTU)) { 3864 mtu = virtio_cread16(vdev, 3865 offsetof(struct virtio_net_config, 3866 mtu)); 3867 if (mtu < dev->min_mtu) { 3868 /* Should never trigger: MTU was previously validated 3869 * in virtnet_validate. 3870 */ 3871 dev_err(&vdev->dev, 3872 "device MTU appears to have changed it is now %d < %d", 3873 mtu, dev->min_mtu); 3874 err = -EINVAL; 3875 goto free; 3876 } 3877 3878 dev->mtu = mtu; 3879 dev->max_mtu = mtu; 3880 } 3881 3882 virtnet_set_big_packets(vi, mtu); 3883 3884 if (vi->any_header_sg) 3885 dev->needed_headroom = vi->hdr_len; 3886 3887 /* Enable multiqueue by default */ 3888 if (num_online_cpus() >= max_queue_pairs) 3889 vi->curr_queue_pairs = max_queue_pairs; 3890 else 3891 vi->curr_queue_pairs = num_online_cpus(); 3892 vi->max_queue_pairs = max_queue_pairs; 3893 3894 /* Allocate/initialize the rx/tx queues, and invoke find_vqs */ 3895 err = init_vqs(vi); 3896 if (err) 3897 goto free; 3898 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
