diff options
Diffstat (limited to 'drivers/vfio/fsl-mc/vfio_fsl_mc.c')
| -rw-r--r-- | drivers/vfio/fsl-mc/vfio_fsl_mc.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c index eb40249..b01e9c0 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c @@ -44,10 +44,31 @@ static void vfio_fsl_mc_release(void *device_data) static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd, unsigned long arg) { + struct vfio_fsl_mc_device *vdev = device_data; + struct fsl_mc_device *mc_dev = vdev->mc_dev; + unsigned long minsz; + + if (WARN_ON(!mc_dev)) + return -ENODEV; + switch (cmd) { case VFIO_DEVICE_GET_INFO: { - return -EINVAL; + struct vfio_device_info info; + + minsz = offsetofend(struct vfio_device_info, num_irqs); + + if (copy_from_user(&info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info.argsz < minsz) + return -EINVAL; + + info.flags = VFIO_DEVICE_FLAGS_FSL_MC; + info.num_regions = mc_dev->obj_desc.region_count; + info.num_irqs = mc_dev->obj_desc.irq_count; + + return copy_to_user((void __user *)arg, &info, minsz); } case VFIO_DEVICE_GET_REGION_INFO: { |