From: Longpeng <[email protected]>
To support generic vdpa deivce[1], we need add the following ioctls:
- GET_CONFIG_SIZE: the size of the virtio config space (Patch 1)
- GET_VQS_COUNT: the count of virtqueues that exposed (Patch 2)
Changes v1(RFC) -> v2:
Patch 1:
- be more verbose in commit message and the comment for get_config_size
[Jason]
Patch 2:
- change the type of nvqs to u32 [Jason]
Patch 3:
- drop from this series because Gautam sent another proposal[2]
[1] https://lore.kernel.org/all/[email protected]/
[2] https://patchwork.kernel.org/project/kvm/patch/[email protected]/
Longpeng (2):
vdpa: support exposing the config size to userspace
vdpa: support exposing the count of vqs to userspace
drivers/vdpa/vdpa.c | 6 +++---
drivers/vhost/vdpa.c | 40 ++++++++++++++++++++++++++++++++++++----
include/linux/vdpa.h | 9 +++++----
include/uapi/linux/vhost.h | 7 +++++++
4 files changed, 51 insertions(+), 11 deletions(-)
--
1.8.3.1
From: Longpeng <[email protected]>
- GET_VQS_COUNT: the count of virtqueues that exposed
And change vdpa_device.nvqs and vhost_vdpa.nvqs to use u32.
Signed-off-by: Longpeng <[email protected]>
---
drivers/vdpa/vdpa.c | 6 +++---
drivers/vhost/vdpa.c | 23 +++++++++++++++++++----
include/linux/vdpa.h | 6 +++---
include/uapi/linux/vhost.h | 3 +++
4 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 1ea5254..2b75c00 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -232,7 +232,7 @@ static int vdpa_name_match(struct device *dev, const void *data)
return (strcmp(dev_name(&vdev->dev), data) == 0);
}
-static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
+static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
{
struct device *dev;
@@ -257,7 +257,7 @@ static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
*
* Return: Returns an error when fail to add device to vDPA bus
*/
-int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
+int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
{
if (!vdev->mdev)
return -EINVAL;
@@ -274,7 +274,7 @@ int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
*
* Return: Returns an error when fail to add to vDPA bus
*/
-int vdpa_register_device(struct vdpa_device *vdev, int nvqs)
+int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
{
int err;
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 605c7ae..69b3f05 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -42,7 +42,7 @@ struct vhost_vdpa {
struct device dev;
struct cdev cdev;
atomic_t opened;
- int nvqs;
+ u32 nvqs;
int virtio_id;
int minor;
struct eventfd_ctx *config_ctx;
@@ -158,7 +158,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
u8 status, status_old;
- int ret, nvqs = v->nvqs;
+ u32 nvqs = v->nvqs;
+ int ret;
u16 i;
if (copy_from_user(&status, statusp, sizeof(status)))
@@ -369,6 +370,16 @@ static long vhost_vdpa_get_config_size(struct vhost_vdpa *v, u32 __user *argp)
return 0;
}
+static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp)
+{
+ struct vdpa_device *vdpa = v->vdpa;
+
+ if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs)))
+ return -EFAULT;
+
+ return 0;
+}
+
static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
void __user *argp)
{
@@ -509,6 +520,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_GET_CONFIG_SIZE:
r = vhost_vdpa_get_config_size(v, argp);
break;
+ case VHOST_VDPA_GET_VQS_COUNT:
+ r = vhost_vdpa_get_vqs_count(v, argp);
+ break;
default:
r = vhost_dev_ioctl(&v->vdev, cmd, argp);
if (r == -ENOIOCTLCMD)
@@ -965,7 +979,8 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
struct vhost_vdpa *v;
struct vhost_dev *dev;
struct vhost_virtqueue **vqs;
- int nvqs, i, r, opened;
+ int r, opened;
+ u32 i, nvqs;
v = container_of(inode->i_cdev, struct vhost_vdpa, cdev);
@@ -1018,7 +1033,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
static void vhost_vdpa_clean_irq(struct vhost_vdpa *v)
{
- int i;
+ u32 i;
for (i = 0; i < v->nvqs; i++)
vhost_vdpa_unsetup_vq_irq(v, i);
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index a526919..8943a20 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -83,7 +83,7 @@ struct vdpa_device {
unsigned int index;
bool features_valid;
bool use_va;
- int nvqs;
+ u32 nvqs;
struct vdpa_mgmt_dev *mdev;
};
@@ -338,10 +338,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
dev_struct, member)), name, use_va), \
dev_struct, member)
-int vdpa_register_device(struct vdpa_device *vdev, int nvqs);
+int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
void vdpa_unregister_device(struct vdpa_device *vdev);
-int _vdpa_register_device(struct vdpa_device *vdev, int nvqs);
+int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
void _vdpa_unregister_device(struct vdpa_device *vdev);
/**
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index bc74e95..5d99e7c 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -154,4 +154,7 @@
/* Get the config size */
#define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
+/* Get the count of all virtqueues */
+#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32)
+
#endif
--
1.8.3.1
在 2022/3/10 下午3:20, Longpeng(Mike) 写道:
> From: Longpeng <[email protected]>
>
> - GET_VQS_COUNT: the count of virtqueues that exposed
>
> And change vdpa_device.nvqs and vhost_vdpa.nvqs to use u32.
Patch looks good, a nit is that we'd better use a separate patch for the
u32 converting.
Thanks
>
> Signed-off-by: Longpeng <[email protected]>
> ---
> drivers/vdpa/vdpa.c | 6 +++---
> drivers/vhost/vdpa.c | 23 +++++++++++++++++++----
> include/linux/vdpa.h | 6 +++---
> include/uapi/linux/vhost.h | 3 +++
> 4 files changed, 28 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> index 1ea5254..2b75c00 100644
> --- a/drivers/vdpa/vdpa.c
> +++ b/drivers/vdpa/vdpa.c
> @@ -232,7 +232,7 @@ static int vdpa_name_match(struct device *dev, const void *data)
> return (strcmp(dev_name(&vdev->dev), data) == 0);
> }
>
> -static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> +static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> {
> struct device *dev;
>
> @@ -257,7 +257,7 @@ static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> *
> * Return: Returns an error when fail to add device to vDPA bus
> */
> -int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> +int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> {
> if (!vdev->mdev)
> return -EINVAL;
> @@ -274,7 +274,7 @@ int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> *
> * Return: Returns an error when fail to add to vDPA bus
> */
> -int vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> +int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> {
> int err;
>
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index 605c7ae..69b3f05 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -42,7 +42,7 @@ struct vhost_vdpa {
> struct device dev;
> struct cdev cdev;
> atomic_t opened;
> - int nvqs;
> + u32 nvqs;
> int virtio_id;
> int minor;
> struct eventfd_ctx *config_ctx;
> @@ -158,7 +158,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
> struct vdpa_device *vdpa = v->vdpa;
> const struct vdpa_config_ops *ops = vdpa->config;
> u8 status, status_old;
> - int ret, nvqs = v->nvqs;
> + u32 nvqs = v->nvqs;
> + int ret;
> u16 i;
>
> if (copy_from_user(&status, statusp, sizeof(status)))
> @@ -369,6 +370,16 @@ static long vhost_vdpa_get_config_size(struct vhost_vdpa *v, u32 __user *argp)
> return 0;
> }
>
> +static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp)
> +{
> + struct vdpa_device *vdpa = v->vdpa;
> +
> + if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs)))
> + return -EFAULT;
> +
> + return 0;
> +}
> +
> static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
> void __user *argp)
> {
> @@ -509,6 +520,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
> case VHOST_VDPA_GET_CONFIG_SIZE:
> r = vhost_vdpa_get_config_size(v, argp);
> break;
> + case VHOST_VDPA_GET_VQS_COUNT:
> + r = vhost_vdpa_get_vqs_count(v, argp);
> + break;
> default:
> r = vhost_dev_ioctl(&v->vdev, cmd, argp);
> if (r == -ENOIOCTLCMD)
> @@ -965,7 +979,8 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
> struct vhost_vdpa *v;
> struct vhost_dev *dev;
> struct vhost_virtqueue **vqs;
> - int nvqs, i, r, opened;
> + int r, opened;
> + u32 i, nvqs;
>
> v = container_of(inode->i_cdev, struct vhost_vdpa, cdev);
>
> @@ -1018,7 +1033,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
>
> static void vhost_vdpa_clean_irq(struct vhost_vdpa *v)
> {
> - int i;
> + u32 i;
>
> for (i = 0; i < v->nvqs; i++)
> vhost_vdpa_unsetup_vq_irq(v, i);
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index a526919..8943a20 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -83,7 +83,7 @@ struct vdpa_device {
> unsigned int index;
> bool features_valid;
> bool use_va;
> - int nvqs;
> + u32 nvqs;
> struct vdpa_mgmt_dev *mdev;
> };
>
> @@ -338,10 +338,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
> dev_struct, member)), name, use_va), \
> dev_struct, member)
>
> -int vdpa_register_device(struct vdpa_device *vdev, int nvqs);
> +int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
> void vdpa_unregister_device(struct vdpa_device *vdev);
>
> -int _vdpa_register_device(struct vdpa_device *vdev, int nvqs);
> +int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
> void _vdpa_unregister_device(struct vdpa_device *vdev);
>
> /**
> diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
> index bc74e95..5d99e7c 100644
> --- a/include/uapi/linux/vhost.h
> +++ b/include/uapi/linux/vhost.h
> @@ -154,4 +154,7 @@
> /* Get the config size */
> #define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
>
> +/* Get the count of all virtqueues */
> +#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32)
> +
> #endif
> -----Original Message-----
> From: Jason Wang [mailto:[email protected]]
> Sent: Monday, March 14, 2022 2:04 PM
> To: Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
> <[email protected]>; [email protected]; [email protected];
> [email protected]
> Cc: [email protected]; [email protected];
> [email protected]; [email protected]; Gonglei (Arei)
> <[email protected]>; Yechuan <[email protected]>; Huangzhichao
> <[email protected]>; [email protected]
> Subject: Re: [PATCH v2 2/2] vdpa: support exposing the count of vqs to userspace
>
>
> 在 2022/3/10 下午3:20, Longpeng(Mike) 写道:
> > From: Longpeng <[email protected]>
> >
> > - GET_VQS_COUNT: the count of virtqueues that exposed
> >
> > And change vdpa_device.nvqs and vhost_vdpa.nvqs to use u32.
>
>
> Patch looks good, a nit is that we'd better use a separate patch for the
> u32 converting.
>
OK, will do in v3, thanks.
> Thanks
>
>
> >
> > Signed-off-by: Longpeng <[email protected]>
> > ---
> > drivers/vdpa/vdpa.c | 6 +++---
> > drivers/vhost/vdpa.c | 23 +++++++++++++++++++----
> > include/linux/vdpa.h | 6 +++---
> > include/uapi/linux/vhost.h | 3 +++
> > 4 files changed, 28 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> > index 1ea5254..2b75c00 100644
> > --- a/drivers/vdpa/vdpa.c
> > +++ b/drivers/vdpa/vdpa.c
> > @@ -232,7 +232,7 @@ static int vdpa_name_match(struct device *dev, const void
> *data)
> > return (strcmp(dev_name(&vdev->dev), data) == 0);
> > }
> >
> > -static int __vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> > +static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> > {
> > struct device *dev;
> >
> > @@ -257,7 +257,7 @@ static int __vdpa_register_device(struct vdpa_device *vdev,
> int nvqs)
> > *
> > * Return: Returns an error when fail to add device to vDPA bus
> > */
> > -int _vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> > +int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> > {
> > if (!vdev->mdev)
> > return -EINVAL;
> > @@ -274,7 +274,7 @@ int _vdpa_register_device(struct vdpa_device *vdev, int
> nvqs)
> > *
> > * Return: Returns an error when fail to add to vDPA bus
> > */
> > -int vdpa_register_device(struct vdpa_device *vdev, int nvqs)
> > +int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
> > {
> > int err;
> >
> > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> > index 605c7ae..69b3f05 100644
> > --- a/drivers/vhost/vdpa.c
> > +++ b/drivers/vhost/vdpa.c
> > @@ -42,7 +42,7 @@ struct vhost_vdpa {
> > struct device dev;
> > struct cdev cdev;
> > atomic_t opened;
> > - int nvqs;
> > + u32 nvqs;
> > int virtio_id;
> > int minor;
> > struct eventfd_ctx *config_ctx;
> > @@ -158,7 +158,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v,
> u8 __user *statusp)
> > struct vdpa_device *vdpa = v->vdpa;
> > const struct vdpa_config_ops *ops = vdpa->config;
> > u8 status, status_old;
> > - int ret, nvqs = v->nvqs;
> > + u32 nvqs = v->nvqs;
> > + int ret;
> > u16 i;
> >
> > if (copy_from_user(&status, statusp, sizeof(status)))
> > @@ -369,6 +370,16 @@ static long vhost_vdpa_get_config_size(struct vhost_vdpa
> *v, u32 __user *argp)
> > return 0;
> > }
> >
> > +static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp)
> > +{
> > + struct vdpa_device *vdpa = v->vdpa;
> > +
> > + if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs)))
> > + return -EFAULT;
> > +
> > + return 0;
> > +}
> > +
> > static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
> > void __user *argp)
> > {
> > @@ -509,6 +520,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
> > case VHOST_VDPA_GET_CONFIG_SIZE:
> > r = vhost_vdpa_get_config_size(v, argp);
> > break;
> > + case VHOST_VDPA_GET_VQS_COUNT:
> > + r = vhost_vdpa_get_vqs_count(v, argp);
> > + break;
> > default:
> > r = vhost_dev_ioctl(&v->vdev, cmd, argp);
> > if (r == -ENOIOCTLCMD)
> > @@ -965,7 +979,8 @@ static int vhost_vdpa_open(struct inode *inode, struct
> file *filep)
> > struct vhost_vdpa *v;
> > struct vhost_dev *dev;
> > struct vhost_virtqueue **vqs;
> > - int nvqs, i, r, opened;
> > + int r, opened;
> > + u32 i, nvqs;
> >
> > v = container_of(inode->i_cdev, struct vhost_vdpa, cdev);
> >
> > @@ -1018,7 +1033,7 @@ static int vhost_vdpa_open(struct inode *inode, struct
> file *filep)
> >
> > static void vhost_vdpa_clean_irq(struct vhost_vdpa *v)
> > {
> > - int i;
> > + u32 i;
> >
> > for (i = 0; i < v->nvqs; i++)
> > vhost_vdpa_unsetup_vq_irq(v, i);
> > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> > index a526919..8943a20 100644
> > --- a/include/linux/vdpa.h
> > +++ b/include/linux/vdpa.h
> > @@ -83,7 +83,7 @@ struct vdpa_device {
> > unsigned int index;
> > bool features_valid;
> > bool use_va;
> > - int nvqs;
> > + u32 nvqs;
> > struct vdpa_mgmt_dev *mdev;
> > };
> >
> > @@ -338,10 +338,10 @@ struct vdpa_device *__vdpa_alloc_device(struct device
> *parent,
> > dev_struct, member)), name, use_va), \
> > dev_struct, member)
> >
> > -int vdpa_register_device(struct vdpa_device *vdev, int nvqs);
> > +int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
> > void vdpa_unregister_device(struct vdpa_device *vdev);
> >
> > -int _vdpa_register_device(struct vdpa_device *vdev, int nvqs);
> > +int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
> > void _vdpa_unregister_device(struct vdpa_device *vdev);
> >
> > /**
> > diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
> > index bc74e95..5d99e7c 100644
> > --- a/include/uapi/linux/vhost.h
> > +++ b/include/uapi/linux/vhost.h
> > @@ -154,4 +154,7 @@
> > /* Get the config size */
> > #define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32)
> >
> > +/* Get the count of all virtqueues */
> > +#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32)
> > +
> > #endif