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vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms
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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: 1a86b37 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Link: https://github.com/ClangBuiltLinux/linux/issues/1140
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200821225018.940798-1-natechancellor@gmail.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Acked-by: Eli Cohen <elic@nvidia.com>
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Nathan Chancellor authored and Michael S. Tsirkin committed Aug 26, 2020
1 parent eb07d8f commit cbb5235
Showing 1 changed file with 25 additions and 25 deletions.
50 changes: 25 additions & 25 deletions drivers/vdpa/mlx5/net/mlx5_vnet.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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 | \
Expand Down Expand Up @@ -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)

Expand Down Expand Up @@ -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)
Expand Down Expand Up @@ -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;
}
Expand All @@ -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;
Expand Down

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