thr3ads.net - Linux Virtualization - [PATCH] vdpa: allow a 32 bit vq alignment [Apr 2020]

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Michael S. Tsirkin

2020-Apr-09 20:28 UTC

[PATCH] vdpa: allow a 32 bit vq alignment

get_vq_align returns u16 now, but that's not enough for
systems/devices with 64K pages. All callers assign it to
a u32 variable anyway, so let's just change the return
value type to u32.

Cc: "Zhu, Lingshan" <lingshan.zhu at intel.com>
Reported-by: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c  | 2 +-
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 +-
 include/linux/vdpa.h             | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 28d9e5de5675..abf6a061cab6 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -226,7 +226,7 @@ static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device
*vdpa_dev)
 	return IFCVF_SUBSYS_VENDOR_ID;
 }
 
-static u16 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
+static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
 {
 	return IFCVF_QUEUE_ALIGNMENT;
 }
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 72863d01a12a..7957d2d41fc4 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -435,7 +435,7 @@ static u64 vdpasim_get_vq_state(struct vdpa_device *vdpa,
u16 idx)
 	return vrh->last_avail_idx;
 }
 
-static u16 vdpasim_get_vq_align(struct vdpa_device *vdpa)
+static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
 {
 	return VDPASIM_QUEUE_ALIGN;
 }
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 733acfb7ef84..5453af87a33e 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -164,7 +164,7 @@ struct vdpa_config_ops {
 	u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);
 
 	/* Device ops */
-	u16 (*get_vq_align)(struct vdpa_device *vdev);
+	u32 (*get_vq_align)(struct vdpa_device *vdev);
 	u64 (*get_features)(struct vdpa_device *vdev);
 	int (*set_features)(struct vdpa_device *vdev, u64 features);
 	void (*set_config_cb)(struct vdpa_device *vdev,
-- 
MST

Jason Wang

2020-Apr-10 02:31 UTC

head link

[PATCH] vdpa: allow a 32 bit vq alignment

On 2020/4/10 ??4:28, Michael S. Tsirkin wrote:> get_vq_align returns u16 now, but that's not enough for
> systems/devices with 64K pages. All callers assign it to
> a u32 variable anyway, so let's just change the return
> value type to u32.
>
> Cc: "Zhu, Lingshan" <lingshan.zhu at intel.com>
> Reported-by: Arnd Bergmann <arnd at arndb.de>
> Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> ---

Acked-by: Jason Wang <jasowang at redhat.com>

>   drivers/vdpa/ifcvf/ifcvf_main.c  | 2 +-
>   drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 +-
>   include/linux/vdpa.h             | 2 +-
>   3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c
b/drivers/vdpa/ifcvf/ifcvf_main.c
> index 28d9e5de5675..abf6a061cab6 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -226,7 +226,7 @@ static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device
*vdpa_dev)
>   	return IFCVF_SUBSYS_VENDOR_ID;
>   }
>   
> -static u16 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
> +static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
>   {
>   	return IFCVF_QUEUE_ALIGNMENT;
>   }
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c
b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 72863d01a12a..7957d2d41fc4 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -435,7 +435,7 @@ static u64 vdpasim_get_vq_state(struct vdpa_device
*vdpa, u16 idx)
>   	return vrh->last_avail_idx;
>   }
>   
> -static u16 vdpasim_get_vq_align(struct vdpa_device *vdpa)
> +static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
>   {
>   	return VDPASIM_QUEUE_ALIGN;
>   }
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 733acfb7ef84..5453af87a33e 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -164,7 +164,7 @@ struct vdpa_config_ops {
>   	u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);
>   
>   	/* Device ops */
> -	u16 (*get_vq_align)(struct vdpa_device *vdev);
> +	u32 (*get_vq_align)(struct vdpa_device *vdev);
>   	u64 (*get_features)(struct vdpa_device *vdev);
>   	int (*set_features)(struct vdpa_device *vdev, u64 features);
>   	void (*set_config_cb)(struct vdpa_device *vdev,

Jason Wang

2020-Apr-10 06:21 UTC

head link

[PATCH] vdpa: allow a 32 bit vq alignment

Cc Ling Shan.

On 2020/4/10 ??4:28, Michael S. Tsirkin wrote:> get_vq_align returns u16 now, but that's not enough for
> systems/devices with 64K pages. All callers assign it to
> a u32 variable anyway, so let's just change the return
> value type to u32.
>
> Cc: "Zhu, Lingshan" <lingshan.zhu at intel.com>
> Reported-by: Arnd Bergmann <arnd at arndb.de>
> Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> ---
>   drivers/vdpa/ifcvf/ifcvf_main.c  | 2 +-
>   drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 +-
>   include/linux/vdpa.h             | 2 +-
>   3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c
b/drivers/vdpa/ifcvf/ifcvf_main.c
> index 28d9e5de5675..abf6a061cab6 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -226,7 +226,7 @@ static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device
*vdpa_dev)
>   	return IFCVF_SUBSYS_VENDOR_ID;
>   }
>   
> -static u16 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
> +static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
>   {
>   	return IFCVF_QUEUE_ALIGNMENT;
>   }
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c
b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 72863d01a12a..7957d2d41fc4 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -435,7 +435,7 @@ static u64 vdpasim_get_vq_state(struct vdpa_device
*vdpa, u16 idx)
>   	return vrh->last_avail_idx;
>   }
>   
> -static u16 vdpasim_get_vq_align(struct vdpa_device *vdpa)
> +static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
>   {
>   	return VDPASIM_QUEUE_ALIGN;
>   }
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 733acfb7ef84..5453af87a33e 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -164,7 +164,7 @@ struct vdpa_config_ops {
>   	u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx);
>   
>   	/* Device ops */
> -	u16 (*get_vq_align)(struct vdpa_device *vdev);
> +	u32 (*get_vq_align)(struct vdpa_device *vdev);
>   	u64 (*get_features)(struct vdpa_device *vdev);
>   	int (*set_features)(struct vdpa_device *vdev, u64 features);
>   	void (*set_config_cb)(struct vdpa_device *vdev,

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