From cbb523594eb718944b726ba52bb43a1d66188a17 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Fri, 21 Aug 2020 15:50:19 -0700 Subject: [PATCH] vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms Clang warns several times when building for 32-bit ARM along the lines of: drivers/vdpa/mlx5/net/mlx5_vnet.c:1462:31: warning: shift count >= width of type [-Wshift-count-overflow] ndev->mvdev.mlx_features |= BIT(VIRTIO_F_VERSION_1); ^~~~~~~~~~~~~~~~~~~~~~~ This is related to the BIT macro, which uses an unsigned long literal, which is 32-bit on ARM so having a shift equal to or larger than 32 will cause this warning, such as the above, where VIRTIO_F_VERSION_1 is 32. To avoid this, use BIT_ULL, which will be an unsigned long long. This matches the size of the features field throughout this driver, which is u64 so there should be no functional change. Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices") Link: https://github.com/ClangBuiltLinux/linux/issues/1140 Signed-off-by: Nathan Chancellor Link: https://lore.kernel.org/r/20200821225018.940798-1-natechancellor@gmail.com Signed-off-by: Michael S. Tsirkin Reported-by: Randy Dunlap Acked-by: Randy Dunlap # build-tested Acked-by: Eli Cohen --- drivers/vdpa/mlx5/net/mlx5_vnet.c | 50 +++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 25 deletions(-) diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 9df69d5..70676a6 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -16,19 +16,19 @@ #define to_mvdev(__vdev) container_of((__vdev), struct mlx5_vdpa_dev, vdev) #define VALID_FEATURES_MASK \ - (BIT(VIRTIO_NET_F_CSUM) | BIT(VIRTIO_NET_F_GUEST_CSUM) | \ - BIT(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | BIT(VIRTIO_NET_F_MTU) | BIT(VIRTIO_NET_F_MAC) | \ - BIT(VIRTIO_NET_F_GUEST_TSO4) | BIT(VIRTIO_NET_F_GUEST_TSO6) | \ - BIT(VIRTIO_NET_F_GUEST_ECN) | BIT(VIRTIO_NET_F_GUEST_UFO) | BIT(VIRTIO_NET_F_HOST_TSO4) | \ - BIT(VIRTIO_NET_F_HOST_TSO6) | BIT(VIRTIO_NET_F_HOST_ECN) | BIT(VIRTIO_NET_F_HOST_UFO) | \ - BIT(VIRTIO_NET_F_MRG_RXBUF) | BIT(VIRTIO_NET_F_STATUS) | BIT(VIRTIO_NET_F_CTRL_VQ) | \ - BIT(VIRTIO_NET_F_CTRL_RX) | BIT(VIRTIO_NET_F_CTRL_VLAN) | \ - BIT(VIRTIO_NET_F_CTRL_RX_EXTRA) | BIT(VIRTIO_NET_F_GUEST_ANNOUNCE) | \ - BIT(VIRTIO_NET_F_MQ) | BIT(VIRTIO_NET_F_CTRL_MAC_ADDR) | BIT(VIRTIO_NET_F_HASH_REPORT) | \ - BIT(VIRTIO_NET_F_RSS) | BIT(VIRTIO_NET_F_RSC_EXT) | BIT(VIRTIO_NET_F_STANDBY) | \ - BIT(VIRTIO_NET_F_SPEED_DUPLEX) | BIT(VIRTIO_F_NOTIFY_ON_EMPTY) | \ - BIT(VIRTIO_F_ANY_LAYOUT) | BIT(VIRTIO_F_VERSION_1) | BIT(VIRTIO_F_ACCESS_PLATFORM) | \ - BIT(VIRTIO_F_RING_PACKED) | BIT(VIRTIO_F_ORDER_PLATFORM) | BIT(VIRTIO_F_SR_IOV)) + (BIT_ULL(VIRTIO_NET_F_CSUM) | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | \ + BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | BIT_ULL(VIRTIO_NET_F_MTU) | BIT_ULL(VIRTIO_NET_F_MAC) | \ + BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | \ + BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | \ + BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | \ + BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | BIT_ULL(VIRTIO_NET_F_STATUS) | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | \ + BIT_ULL(VIRTIO_NET_F_CTRL_RX) | BIT_ULL(VIRTIO_NET_F_CTRL_VLAN) | \ + BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA) | BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE) | \ + BIT_ULL(VIRTIO_NET_F_MQ) | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | BIT_ULL(VIRTIO_NET_F_HASH_REPORT) | \ + BIT_ULL(VIRTIO_NET_F_RSS) | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | BIT_ULL(VIRTIO_NET_F_STANDBY) | \ + BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX) | BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY) | \ + BIT_ULL(VIRTIO_F_ANY_LAYOUT) | BIT_ULL(VIRTIO_F_VERSION_1) | BIT_ULL(VIRTIO_F_ACCESS_PLATFORM) | \ + BIT_ULL(VIRTIO_F_RING_PACKED) | BIT_ULL(VIRTIO_F_ORDER_PLATFORM) | BIT_ULL(VIRTIO_F_SR_IOV)) #define VALID_STATUS_MASK \ (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK | \ @@ -149,7 +149,7 @@ static bool mlx5_vdpa_debug; #define MLX5_LOG_VIO_FLAG(_feature) \ do { \ - if (features & BIT(_feature)) \ + if (features & BIT_ULL(_feature)) \ mlx5_vdpa_info(mvdev, "%s\n", #_feature); \ } while (0) @@ -750,10 +750,10 @@ static bool vq_is_tx(u16 idx) static u16 get_features_12_3(u64 features) { - return (!!(features & BIT(VIRTIO_NET_F_HOST_TSO4)) << 9) | - (!!(features & BIT(VIRTIO_NET_F_HOST_TSO6)) << 8) | - (!!(features & BIT(VIRTIO_NET_F_CSUM)) << 7) | - (!!(features & BIT(VIRTIO_NET_F_GUEST_CSUM)) << 6); + return (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO4)) << 9) | + (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO6)) << 8) | + (!!(features & BIT_ULL(VIRTIO_NET_F_CSUM)) << 7) | + (!!(features & BIT_ULL(VIRTIO_NET_F_GUEST_CSUM)) << 6); } static int create_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) @@ -1439,13 +1439,13 @@ static u64 mlx_to_vritio_features(u16 dev_features) u64 result = 0; if (dev_features & MLX5_VIRTIO_NET_F_GUEST_CSUM) - result |= BIT(VIRTIO_NET_F_GUEST_CSUM); + result |= BIT_ULL(VIRTIO_NET_F_GUEST_CSUM); if (dev_features & MLX5_VIRTIO_NET_F_CSUM) - result |= BIT(VIRTIO_NET_F_CSUM); + result |= BIT_ULL(VIRTIO_NET_F_CSUM); if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO6) - result |= BIT(VIRTIO_NET_F_HOST_TSO6); + result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO6); if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO4) - result |= BIT(VIRTIO_NET_F_HOST_TSO4); + result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO4); return result; } @@ -1459,15 +1459,15 @@ static u64 mlx5_vdpa_get_features(struct vdpa_device *vdev) dev_features = MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, device_features_bits_mask); ndev->mvdev.mlx_features = mlx_to_vritio_features(dev_features); if (MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, virtio_version_1_0)) - ndev->mvdev.mlx_features |= BIT(VIRTIO_F_VERSION_1); - ndev->mvdev.mlx_features |= BIT(VIRTIO_F_ACCESS_PLATFORM); + ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_VERSION_1); + ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_ACCESS_PLATFORM); print_features(mvdev, ndev->mvdev.mlx_features, false); return ndev->mvdev.mlx_features; } static int verify_min_features(struct mlx5_vdpa_dev *mvdev, u64 features) { - if (!(features & BIT(VIRTIO_F_ACCESS_PLATFORM))) + if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM))) return -EOPNOTSUPP; return 0; -- 2.7.4