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vfio/mbochs: Provide a get_region_info op 

Move it out of mbochs_ioctl() and re-indent it.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/8-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
This commit is contained in:
Jason Gunthorpe 2025-11-07 13:41:24 -04:00 committed by Alex Williamson
parent cf16acc0af
commit 8339fccda8
1 changed files with 31 additions and 25 deletions
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56
samples/vfio-mdev/mbochs.c
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@ -1185,13 +1185,42 @@ static int mbochs_get_gfx_dmabuf(struct mdev_state *mdev_state, u32 id)
return dma_buf_fd(dmabuf->buf, 0);
}
static int mbochs_ioctl_get_region_info(struct vfio_device *vdev,
struct vfio_region_info __user *arg)
{
struct mdev_state *mdev_state =
container_of(vdev, struct mdev_state, vdev);
struct vfio_region_info_ext info;
unsigned long minsz, outsz;
int ret;
minsz = offsetofend(typeof(info), base.offset);
if (copy_from_user(&info, arg, minsz))
return -EFAULT;
outsz = info.base.argsz;
if (outsz < minsz)
return -EINVAL;
if (outsz > sizeof(info))
return -EINVAL;
ret = mbochs_get_region_info(mdev_state, &info);
if (ret)
return ret;
if (copy_to_user(arg, &info, outsz))
return -EFAULT;
return 0;
}
static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd,
unsigned long arg)
{
struct mdev_state *mdev_state =
container_of(vdev, struct mdev_state, vdev);
int ret = 0;
unsigned long minsz, outsz;
unsigned long minsz;
switch (cmd) {
case VFIO_DEVICE_GET_INFO:
@ -1215,30 +1244,6 @@ static long mbochs_ioctl(struct vfio_device *vdev, unsigned int cmd,
return 0;
}
case VFIO_DEVICE_GET_REGION_INFO:
{
struct vfio_region_info_ext info;
minsz = offsetofend(typeof(info), base.offset);
if (copy_from_user(&info, (void __user *)arg, minsz))
return -EFAULT;
outsz = info.base.argsz;
if (outsz < minsz)
return -EINVAL;
if (outsz > sizeof(info))
return -EINVAL;
ret = mbochs_get_region_info(mdev_state, &info);
if (ret)
return ret;
if (copy_to_user((void __user *)arg, &info, outsz))
return -EFAULT;
return 0;
}
case VFIO_DEVICE_GET_IRQ_INFO:
{
@ -1376,6 +1381,7 @@ static const struct vfio_device_ops mbochs_dev_ops = {
.read = mbochs_read,
.write = mbochs_write,
.ioctl = mbochs_ioctl,
.get_region_info = mbochs_ioctl_get_region_info,
.mmap = mbochs_mmap,
.bind_iommufd = vfio_iommufd_emulated_bind,
.unbind_iommufd = vfio_iommufd_emulated_unbind,