diff options
| author | Eugenio Pérez <eperezma@redhat.com> | 2026-07-07 14:25:00 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2026-08-19 06:38:48 -0400 |
| commit | a596238c2ab6944861404dc597133ffd4ad062d5 (patch) | |
| tree | 0e7d5dfabba4005ddf7e6a29bd886ecd64b97406 | |
| parent | 0ff906166f00ac7b2ccc36c57be6ad4be0dd9e90 (diff) | |
vduse: add VDUSE_GET_FEATURES ioctl
Add an ioctl to allow VDUSE instances to query the available features
supported by the kernel module.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260707122502.239022-3-eperezma@redhat.com>
| -rw-r--r-- | drivers/vdpa/vdpa_user/vduse_dev.c | 7 | ||||
| -rw-r--r-- | include/uapi/linux/vduse.h | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c index 861a8093daa0..f3f24cc59eb0 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -51,6 +51,9 @@ #define IRQ_UNBOUND -1 +/* Supported VDUSE features */ +static const uint64_t vduse_features; + /* * VDUSE instance have not asked the vduse API version, so assume 0. * @@ -2342,6 +2345,10 @@ static long vduse_ioctl(struct file *file, unsigned int cmd, ret = vduse_destroy_dev(name); break; } + case VDUSE_GET_FEATURES: + ret = put_user(vduse_features, (u64 __user *)argp); + break; + default: ret = -EINVAL; break; diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h index 361eea511c21..89aa3b448c0a 100644 --- a/include/uapi/linux/vduse.h +++ b/include/uapi/linux/vduse.h @@ -63,6 +63,9 @@ struct vduse_dev_config { */ #define VDUSE_DESTROY_DEV _IOW(VDUSE_BASE, 0x03, char[VDUSE_NAME_MAX]) +/* Get the VDUSE supported features */ +#define VDUSE_GET_FEATURES _IOR(VDUSE_BASE, 0x04, __u64) + /* The ioctls for VDUSE device (/dev/vduse/$NAME) */ /** |