diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2025-11-07 13:41:17 -0400 |
|---|---|---|
| committer | Alex Williamson <alex@shazbot.org> | 2025-11-12 14:58:23 -0700 |
| commit | 113557b0406818a8a5df3479b0a89125d2b2a04c (patch) | |
| tree | 975e048af935089042fa23b91c706d6e53f9500b /drivers/vfio | |
| parent | 0ed3a30fd996cb0cac872432cf25185fda7e5316 (diff) | |
vfio: Provide a get_region_info op
Instead of hooking the general ioctl op, have the core code directly
decode VFIO_DEVICE_GET_REGION_INFO and call an op just for it.
This is intended to allow mechanical changes to the drivers to pull their
VFIO_DEVICE_GET_REGION_INFO int oa function. Later patches will improve
the function signature to consolidate more code.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/1-v2-2a9e24d62f1b+e10a-vfio_get_region_info_op_jgg@nvidia.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 9 | ||||
| -rw-r--r-- | drivers/vfio/vfio_main.c | 7 |
2 files changed, 13 insertions, 3 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 7dcf5439dedc..1dc350003f07 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -996,9 +996,11 @@ static int vfio_pci_ioctl_get_info(struct vfio_pci_core_device *vdev, return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; } -static int vfio_pci_ioctl_get_region_info(struct vfio_pci_core_device *vdev, - struct vfio_region_info __user *arg) +int vfio_pci_ioctl_get_region_info(struct vfio_device *core_vdev, + struct vfio_region_info __user *arg) { + struct vfio_pci_core_device *vdev = + container_of(core_vdev, struct vfio_pci_core_device, vdev); unsigned long minsz = offsetofend(struct vfio_region_info, offset); struct pci_dev *pdev = vdev->pdev; struct vfio_region_info info; @@ -1132,6 +1134,7 @@ static int vfio_pci_ioctl_get_region_info(struct vfio_pci_core_device *vdev, return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; } +EXPORT_SYMBOL_GPL(vfio_pci_ioctl_get_region_info); static int vfio_pci_ioctl_get_irq_info(struct vfio_pci_core_device *vdev, struct vfio_irq_info __user *arg) @@ -1458,7 +1461,7 @@ long vfio_pci_core_ioctl(struct vfio_device *core_vdev, unsigned int cmd, case VFIO_DEVICE_GET_PCI_HOT_RESET_INFO: return vfio_pci_ioctl_get_pci_hot_reset_info(vdev, uarg); case VFIO_DEVICE_GET_REGION_INFO: - return vfio_pci_ioctl_get_region_info(vdev, uarg); + return vfio_pci_ioctl_get_region_info(core_vdev, uarg); case VFIO_DEVICE_IOEVENTFD: return vfio_pci_ioctl_ioeventfd(vdev, uarg); case VFIO_DEVICE_PCI_HOT_RESET: diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 38c8e9350a60..a390163ce706 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -1296,7 +1296,14 @@ static long vfio_device_fops_unl_ioctl(struct file *filep, ret = vfio_ioctl_device_feature(device, uptr); break; + case VFIO_DEVICE_GET_REGION_INFO: + if (!device->ops->get_region_info) + goto ioctl_fallback; + ret = device->ops->get_region_info(device, uptr); + break; + default: +ioctl_fallback: if (unlikely(!device->ops->ioctl)) ret = -EINVAL; else |