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* [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature
@ 2026-05-11  9:45 Dragos Tatulea
  2026-05-21  7:14 ` Dragos Tatulea
  2026-05-21  8:26 ` Eugenio Perez Martin
  0 siblings, 2 replies; 4+ messages in thread
From: Dragos Tatulea @ 2026-05-11  9:45 UTC (permalink / raw)
  To: virtualization, Dragos Tatulea, Michael S. Tsirkin, Jason Wang,
	Xuan Zhuo, Eugenio Pérez
  Cc: Tariq Toukan, Shahar Shitrit, linux-kernel, kvm, netdev

The commit in the fixes tag blocked VHOST_VDPA_SET_GROUP_ASID operations
once DRIVER_OK is set. That is too strict for devices which can safely
handle this during live migration flows.

Bring back this behavior under a new vhost backend feature flag. The
feature is supported by mlx5 and vdpa_sim devices.

Fixes: 3543b04a4ea3 ("vhost: forbid change vq groups ASID if DRIVER_OK is set")
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Shahar Shitrit <shshitrit@nvidia.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c |  3 ++-
 drivers/vdpa/vdpa_sim/vdpa_sim.c  |  3 ++-
 drivers/vhost/vdpa.c              | 13 +++++++++++--
 include/uapi/linux/vhost_types.h  |  4 ++++
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index ad0d5fbbbca8..f89177957c76 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -2906,7 +2906,8 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
 
 static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
 {
-	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
+	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
+	       BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
 }
 
 static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 8cb1cc2ea139..253c7fb35ea0 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -428,7 +428,8 @@ static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
 
 static u64 vdpasim_get_backend_features(const struct vdpa_device *vdpa)
 {
-	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
+	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
+	       BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
 }
 
 static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 692564b1bcbb..67b3f49fa709 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -682,7 +682,8 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
 			return -EFAULT;
 		if (idx >= vdpa->ngroups || s.num >= vdpa->nas)
 			return -EINVAL;
-		if (ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK)
+		if ((ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK) &&
+		    !vhost_backend_has_feature(vq, VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK))
 			return -EBUSY;
 		if (!ops->set_group_asid)
 			return -EOPNOTSUPP;
@@ -791,7 +792,8 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
 				 BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST) |
 				 BIT_ULL(VHOST_BACKEND_F_SUSPEND) |
 				 BIT_ULL(VHOST_BACKEND_F_RESUME) |
-				 BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK)))
+				 BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
+				 BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
 			return -EOPNOTSUPP;
 		if ((features & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) &&
 		     !vhost_vdpa_can_suspend(v))
@@ -805,6 +807,13 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
 		if ((features & BIT_ULL(VHOST_BACKEND_F_DESC_ASID)) &&
 		     !vhost_vdpa_has_desc_group(v))
 			return -EOPNOTSUPP;
+		if (features & BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)) {
+			if (!(features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID)))
+				return -EINVAL;
+			if (!(vhost_vdpa_get_backend_features(v) &
+				BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
+				return -EOPNOTSUPP;
+		}
 		if ((features & BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST)) &&
 		     !vhost_vdpa_has_persistent_map(v))
 			return -EOPNOTSUPP;
diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
index 1c39cc5f5a31..ec1ff8a2e260 100644
--- a/include/uapi/linux/vhost_types.h
+++ b/include/uapi/linux/vhost_types.h
@@ -197,5 +197,9 @@ struct vhost_vdpa_iova_range {
 #define VHOST_BACKEND_F_DESC_ASID    0x7
 /* IOTLB don't flush memory mapping across device reset */
 #define VHOST_BACKEND_F_IOTLB_PERSIST  0x8
+/* Device supports changing the group ASID after DRIVER_OK.
+ * Requires VHOST_BACKEND_F_IOTLB_ASID.
+ */
+#define VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK  0x9
 
 #endif
-- 
2.54.0


^ permalink raw reply related	[flat|nested] 4+ messages in thread

* Re: [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature
  2026-05-11  9:45 [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature Dragos Tatulea
@ 2026-05-21  7:14 ` Dragos Tatulea
  2026-05-21  8:26 ` Eugenio Perez Martin
  1 sibling, 0 replies; 4+ messages in thread
From: Dragos Tatulea @ 2026-05-21  7:14 UTC (permalink / raw)
  To: virtualization, Michael S. Tsirkin, Jason Wang, Xuan Zhuo,
	Eugenio Pérez
  Cc: Tariq Toukan, Shahar Shitrit, linux-kernel, kvm, netdev

On Mon, May 11, 2026 at 12:45:03PM +0300, Dragos Tatulea wrote:
> The commit in the fixes tag blocked VHOST_VDPA_SET_GROUP_ASID operations
> once DRIVER_OK is set. That is too strict for devices which can safely
> handle this during live migration flows.
> 
> Bring back this behavior under a new vhost backend feature flag. The
> feature is supported by mlx5 and vdpa_sim devices.
> 
> Fixes: 3543b04a4ea3 ("vhost: forbid change vq groups ASID if DRIVER_OK is set")
> Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
> Reviewed-by: Shahar Shitrit <shshitrit@nvidia.com>
> ---
Gentle ping.

Thanks,
Dragos

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature
  2026-05-11  9:45 [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature Dragos Tatulea
  2026-05-21  7:14 ` Dragos Tatulea
@ 2026-05-21  8:26 ` Eugenio Perez Martin
  2026-06-29  9:39   ` Dragos Tatulea
  1 sibling, 1 reply; 4+ messages in thread
From: Eugenio Perez Martin @ 2026-05-21  8:26 UTC (permalink / raw)
  To: Dragos Tatulea
  Cc: virtualization, Michael S. Tsirkin, Jason Wang, Xuan Zhuo,
	Tariq Toukan, Shahar Shitrit, linux-kernel, kvm, netdev

On Mon, May 11, 2026 at 11:46 AM Dragos Tatulea <dtatulea@nvidia.com> wrote:
>
> The commit in the fixes tag blocked VHOST_VDPA_SET_GROUP_ASID operations
> once DRIVER_OK is set. That is too strict for devices which can safely
> handle this during live migration flows.
>
> Bring back this behavior under a new vhost backend feature flag. The
> feature is supported by mlx5 and vdpa_sim devices.
>
> Fixes: 3543b04a4ea3 ("vhost: forbid change vq groups ASID if DRIVER_OK is set")
> Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
> Reviewed-by: Shahar Shitrit <shshitrit@nvidia.com>

Acked-by: Eugenio Pérez <eperezma@redhat.com>

> ---
>  drivers/vdpa/mlx5/net/mlx5_vnet.c |  3 ++-
>  drivers/vdpa/vdpa_sim/vdpa_sim.c  |  3 ++-
>  drivers/vhost/vdpa.c              | 13 +++++++++++--
>  include/uapi/linux/vhost_types.h  |  4 ++++
>  4 files changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> index ad0d5fbbbca8..f89177957c76 100644
> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
> @@ -2906,7 +2906,8 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
>
>  static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
>  {
> -       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
> +       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
> +              BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
>  }
>
>  static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index 8cb1cc2ea139..253c7fb35ea0 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -428,7 +428,8 @@ static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
>
>  static u64 vdpasim_get_backend_features(const struct vdpa_device *vdpa)
>  {
> -       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
> +       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
> +              BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
>  }
>
>  static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index 692564b1bcbb..67b3f49fa709 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -682,7 +682,8 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
>                         return -EFAULT;
>                 if (idx >= vdpa->ngroups || s.num >= vdpa->nas)
>                         return -EINVAL;
> -               if (ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK)
> +               if ((ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK) &&
> +                   !vhost_backend_has_feature(vq, VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK))
>                         return -EBUSY;
>                 if (!ops->set_group_asid)
>                         return -EOPNOTSUPP;
> @@ -791,7 +792,8 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
>                                  BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST) |
>                                  BIT_ULL(VHOST_BACKEND_F_SUSPEND) |
>                                  BIT_ULL(VHOST_BACKEND_F_RESUME) |
> -                                BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK)))
> +                                BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
> +                                BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
>                         return -EOPNOTSUPP;
>                 if ((features & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) &&
>                      !vhost_vdpa_can_suspend(v))
> @@ -805,6 +807,13 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
>                 if ((features & BIT_ULL(VHOST_BACKEND_F_DESC_ASID)) &&
>                      !vhost_vdpa_has_desc_group(v))
>                         return -EOPNOTSUPP;

Ouch to me here. By reading the errno manual:

Nit: By reading errno(3):
ENOTSUP - Operation not supported (POSIX.1-2001).
EOPNOTSUPP - Operation not supported on socket (POSIX.1-2001).

I picked the wrong constant even if they share the same errno value
(by the same page of the manual). MST, is it worth changing it?

> +               if (features & BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)) {
> +                       if (!(features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID)))
> +                               return -EINVAL;
> +                       if (!(vhost_vdpa_get_backend_features(v) &
> +                               BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
> +                               return -EOPNOTSUPP;
> +               }
>                 if ((features & BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST)) &&
>                      !vhost_vdpa_has_persistent_map(v))
>                         return -EOPNOTSUPP;
> diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
> index 1c39cc5f5a31..ec1ff8a2e260 100644
> --- a/include/uapi/linux/vhost_types.h
> +++ b/include/uapi/linux/vhost_types.h
> @@ -197,5 +197,9 @@ struct vhost_vdpa_iova_range {
>  #define VHOST_BACKEND_F_DESC_ASID    0x7
>  /* IOTLB don't flush memory mapping across device reset */
>  #define VHOST_BACKEND_F_IOTLB_PERSIST  0x8
> +/* Device supports changing the group ASID after DRIVER_OK.
> + * Requires VHOST_BACKEND_F_IOTLB_ASID.
> + */
> +#define VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK  0x9
>
>  #endif
> --
> 2.54.0
>


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature
  2026-05-21  8:26 ` Eugenio Perez Martin
@ 2026-06-29  9:39   ` Dragos Tatulea
  0 siblings, 0 replies; 4+ messages in thread
From: Dragos Tatulea @ 2026-06-29  9:39 UTC (permalink / raw)
  To: Eugenio Perez Martin
  Cc: virtualization, Michael S. Tsirkin, Jason Wang, Xuan Zhuo,
	Tariq Toukan, Shahar Shitrit, linux-kernel, kvm, netdev



On 21.05.26 10:26, Eugenio Perez Martin wrote:
> On Mon, May 11, 2026 at 11:46 AM Dragos Tatulea <dtatulea@nvidia.com> wrote:
>>
>> The commit in the fixes tag blocked VHOST_VDPA_SET_GROUP_ASID operations
>> once DRIVER_OK is set. That is too strict for devices which can safely
>> handle this during live migration flows.
>>
>> Bring back this behavior under a new vhost backend feature flag. The
>> feature is supported by mlx5 and vdpa_sim devices.
>>
>> Fixes: 3543b04a4ea3 ("vhost: forbid change vq groups ASID if DRIVER_OK is set")
>> Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
>> Reviewed-by: Shahar Shitrit <shshitrit@nvidia.com>
> 
> Acked-by: Eugenio Pérez <eperezma@redhat.com>
> 
>> ---
>>  drivers/vdpa/mlx5/net/mlx5_vnet.c |  3 ++-
>>  drivers/vdpa/vdpa_sim/vdpa_sim.c  |  3 ++-
>>  drivers/vhost/vdpa.c              | 13 +++++++++++--
>>  include/uapi/linux/vhost_types.h  |  4 ++++
>>  4 files changed, 19 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>> index ad0d5fbbbca8..f89177957c76 100644
>> --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
>> +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
>> @@ -2906,7 +2906,8 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
>>
>>  static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
>>  {
>> -       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
>> +       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
>> +              BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
>>  }
>>
>>  static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
>> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> index 8cb1cc2ea139..253c7fb35ea0 100644
>> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> @@ -428,7 +428,8 @@ static u64 vdpasim_get_device_features(struct vdpa_device *vdpa)
>>
>>  static u64 vdpasim_get_backend_features(const struct vdpa_device *vdpa)
>>  {
>> -       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
>> +       return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
>> +              BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK);
>>  }
>>
>>  static int vdpasim_set_driver_features(struct vdpa_device *vdpa, u64 features)
>> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
>> index 692564b1bcbb..67b3f49fa709 100644
>> --- a/drivers/vhost/vdpa.c
>> +++ b/drivers/vhost/vdpa.c
>> @@ -682,7 +682,8 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
>>                         return -EFAULT;
>>                 if (idx >= vdpa->ngroups || s.num >= vdpa->nas)
>>                         return -EINVAL;
>> -               if (ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK)
>> +               if ((ops->get_status(vdpa) & VIRTIO_CONFIG_S_DRIVER_OK) &&
>> +                   !vhost_backend_has_feature(vq, VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK))
>>                         return -EBUSY;
>>                 if (!ops->set_group_asid)
>>                         return -EOPNOTSUPP;
>> @@ -791,7 +792,8 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
>>                                  BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST) |
>>                                  BIT_ULL(VHOST_BACKEND_F_SUSPEND) |
>>                                  BIT_ULL(VHOST_BACKEND_F_RESUME) |
>> -                                BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK)))
>> +                                BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
>> +                                BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
>>                         return -EOPNOTSUPP;
>>                 if ((features & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) &&
>>                      !vhost_vdpa_can_suspend(v))
>> @@ -805,6 +807,13 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
>>                 if ((features & BIT_ULL(VHOST_BACKEND_F_DESC_ASID)) &&
>>                      !vhost_vdpa_has_desc_group(v))
>>                         return -EOPNOTSUPP;
> 
> Ouch to me here. By reading the errno manual:
> 
> Nit: By reading errno(3):
> ENOTSUP - Operation not supported (POSIX.1-2001).
> EOPNOTSUPP - Operation not supported on socket (POSIX.1-2001).
> 
> I picked the wrong constant even if they share the same errno value
> (by the same page of the manual). MST, is it worth changing it?
> 
>> +               if (features & BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)) {
>> +                       if (!(features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID)))
>> +                               return -EINVAL;
>> +                       if (!(vhost_vdpa_get_backend_features(v) &
>> +                               BIT_ULL(VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK)))
>> +                               return -EOPNOTSUPP;
>> +               }
>>                 if ((features & BIT_ULL(VHOST_BACKEND_F_IOTLB_PERSIST)) &&
>>                      !vhost_vdpa_has_persistent_map(v))
>>                         return -EOPNOTSUPP;
>> diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
>> index 1c39cc5f5a31..ec1ff8a2e260 100644
>> --- a/include/uapi/linux/vhost_types.h
>> +++ b/include/uapi/linux/vhost_types.h
>> @@ -197,5 +197,9 @@ struct vhost_vdpa_iova_range {
>>  #define VHOST_BACKEND_F_DESC_ASID    0x7
>>  /* IOTLB don't flush memory mapping across device reset */
>>  #define VHOST_BACKEND_F_IOTLB_PERSIST  0x8
>> +/* Device supports changing the group ASID after DRIVER_OK.
>> + * Requires VHOST_BACKEND_F_IOTLB_ASID.
>> + */
>> +#define VHOST_BACKEND_F_GROUP_ASID_AFTER_DRIVER_OK  0x9
>>
>>  #endif
>> --
>> 2.54.0
>>
> 

Gentle ping. Is this patch missing anything?

Thanks,
Dragos


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2026-06-29  9:39 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-11  9:45 [PATCH] vhost-vdpa: Expose ASID group change after DRIVER_OK via backend feature Dragos Tatulea
2026-05-21  7:14 ` Dragos Tatulea
2026-05-21  8:26 ` Eugenio Perez Martin
2026-06-29  9:39   ` Dragos Tatulea

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