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Nathan Chancellor

2020-Aug-21 22:50 UTC

[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 <natechancellor at gmail.com>
---
 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 9df69d5efe8c..70676a6d1691 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;

base-commit: 8a7c3213db068135e816a6a517157de6443290d6
-- 
2.28.0

Randy Dunlap

2020-Aug-21 23:13 UTC

head link

[PATCH] vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms

On 8/21/20 3:50 PM, Nathan Chancellor wrote:> 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 <natechancellor at gmail.com>
Reported-by: Randy Dunlap <rdunlap at infradead.org>
on 2020-AUG-10 for i386:
https://lore.kernel.org/linux-next/5a7a0e6d-842a-78f6-aeac-c5b4c27b7186 at
infradead.org/
:(

Acked-by: Randy Dunlap <rdunlap at infradead.org> # build-tested

Thanks.
> ---
>  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 9df69d5efe8c..70676a6d1691 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;
> 
> base-commit: 8a7c3213db068135e816a6a517157de6443290d6
> 

-- 
~Randy

Nathan Chancellor

2020-Aug-21 23:20 UTC

head link

[PATCH] vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms

On Fri, Aug 21, 2020 at 04:13:19PM -0700, Randy Dunlap
wrote:> On 8/21/20 3:50 PM, Nathan Chancellor wrote:
> > 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 <natechancellor at gmail.com>
> 
> Reported-by: Randy Dunlap <rdunlap at infradead.org>
> on 2020-AUG-10 for i386:
> https://lore.kernel.org/linux-next/5a7a0e6d-842a-78f6-aeac-c5b4c27b7186 at
infradead.org/
> :(
Sorry, I saw this in my own build tests and was not aware of the
previous report since I have not really been paying attention to
the mailing lists as of late :(

Should I need to do a v2, I will be sure to include that tag; otherwise,
it would be great if it could be picked up along with the below.
> Acked-by: Randy Dunlap <rdunlap at infradead.org> # build-tested
Thank you for testing!
> Thanks.
> 
> > ---
> >  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 9df69d5efe8c..70676a6d1691 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;
> > 
> > base-commit: 8a7c3213db068135e816a6a517157de6443290d6
> > 
> 
> 
> -- 
> ~Randy
> 
> -- 
> You received this message because you are subscribed to the Google Groups
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https://groups.google.com/d/msgid/clang-built-linux/1975c0a0-c19a-c91e-dc10-2918061cc4e7%40infradead.org.

Joe Perches

2020-Aug-21 23:24 UTC

head link

[PATCH] vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms

On Fri, 2020-08-21 at 16:13 -0700, Randy Dunlap wrote:> On 8/21/20 3:50 PM, Nathan Chancellor wrote:
> > Clang warns several times when building for 32-bit ARM along the lines
> > of:
The defines are quite horrible to read.
Maybe:
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 61 +++++++++++++++++++++++++++-----
-------
 1 file changed, 43 insertions(+), 18 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 9df69d5efe8c..62b6eec713b2 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -15,24 +15,49 @@
 
 #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))
-
-#define VALID_STATUS_MASK                                                      
\
-	(VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER |
VIRTIO_CONFIG_S_DRIVER_OK |        \
-	 VIRTIO_CONFIG_S_FEATURES_OK | VIRTIO_CONFIG_S_NEEDS_RESET |
VIRTIO_CONFIG_S_FAILED)
+#define VALID_FEATURES_MASK						\
+	(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 |					\
+	 VIRTIO_CONFIG_S_FEATURES_OK |					\
+	 VIRTIO_CONFIG_S_NEEDS_RESET |					\
+	 VIRTIO_CONFIG_S_FAILED)
 
 struct mlx5_vdpa_net_resources {
 	u32 tisn;

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