diff options
Diffstat (limited to 'include/linux/vfio.h')
| -rw-r--r-- | include/linux/vfio.h | 66 |
1 files changed, 64 insertions, 2 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 000a6cab2d31..31b826efba00 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -16,11 +16,13 @@ #include <linux/cdev.h> #include <uapi/linux/vfio.h> #include <linux/iova_bitmap.h> +#include <linux/uaccess.h> struct kvm; struct iommufd_ctx; struct iommufd_device; struct iommufd_access; +struct vfio_info_cap; /* * VFIO devices can be placed in a set, this allows all devices to share this @@ -51,6 +53,7 @@ struct vfio_device { struct vfio_device_set *dev_set; struct list_head dev_set_list; unsigned int migration_flags; + u8 precopy_info_v2; struct kvm *kvm; /* Members below here are private, not for driver use */ @@ -67,16 +70,15 @@ struct vfio_device { struct inode *inode; #if IS_ENABLED(CONFIG_IOMMUFD) struct iommufd_device *iommufd_device; + struct ida pasids; u8 iommufd_attached:1; #endif u8 cdev_opened:1; -#ifdef CONFIG_DEBUG_FS /* * debug_root is a static property of the vfio_device * which must be set prior to registering the vfio_device. */ struct dentry *debug_root; -#endif }; /** @@ -91,6 +93,8 @@ struct vfio_device { * bound iommufd. Undo in unbind_iommufd if @detach_ioas is not * called. * @detach_ioas: Opposite of attach_ioas + * @pasid_attach_ioas: The pasid variation of attach_ioas + * @pasid_detach_ioas: Opposite of pasid_attach_ioas * @open_device: Called when the first file descriptor is opened for this device * @close_device: Opposite of open_device * @read: Perform read(2) on device file descriptor @@ -102,6 +106,9 @@ struct vfio_device { * @match: Optional device name match callback (return: 0 for no-match, >0 for * match, -errno for abort (ex. match with insufficient or incorrect * additional args) + * @match_token_uuid: Optional device token match/validation. Return 0 + * if the uuid is valid for the device, -errno otherwise. uuid is NULL + * if none was provided. * @dma_unmap: Called when userspace unmaps IOVA from the container * this device is attached to. * @device_feature: Optional, fill in the VFIO_DEVICE_FEATURE ioctl @@ -115,6 +122,9 @@ struct vfio_device_ops { void (*unbind_iommufd)(struct vfio_device *vdev); int (*attach_ioas)(struct vfio_device *vdev, u32 *pt_id); void (*detach_ioas)(struct vfio_device *vdev); + int (*pasid_attach_ioas)(struct vfio_device *vdev, u32 pasid, + u32 *pt_id); + void (*pasid_detach_ioas)(struct vfio_device *vdev, u32 pasid); int (*open_device)(struct vfio_device *vdev); void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, @@ -123,9 +133,13 @@ struct vfio_device_ops { size_t count, loff_t *size); long (*ioctl)(struct vfio_device *vdev, unsigned int cmd, unsigned long arg); + int (*get_region_info_caps)(struct vfio_device *vdev, + struct vfio_region_info *info, + struct vfio_info_cap *caps); int (*mmap)(struct vfio_device *vdev, struct vm_area_struct *vma); void (*request)(struct vfio_device *vdev, unsigned int count); int (*match)(struct vfio_device *vdev, char *buf); + int (*match_token_uuid)(struct vfio_device *vdev, const uuid_t *uuid); void (*dma_unmap)(struct vfio_device *vdev, u64 iova, u64 length); int (*device_feature)(struct vfio_device *device, u32 flags, void __user *arg, size_t argsz); @@ -139,6 +153,10 @@ int vfio_iommufd_physical_bind(struct vfio_device *vdev, void vfio_iommufd_physical_unbind(struct vfio_device *vdev); int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id); void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev); +int vfio_iommufd_physical_pasid_attach_ioas(struct vfio_device *vdev, + u32 pasid, u32 *pt_id); +void vfio_iommufd_physical_pasid_detach_ioas(struct vfio_device *vdev, + u32 pasid); int vfio_iommufd_emulated_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_emulated_unbind(struct vfio_device *vdev); @@ -166,6 +184,10 @@ vfio_iommufd_get_dev_id(struct vfio_device *vdev, struct iommufd_ctx *ictx) ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) #define vfio_iommufd_physical_detach_ioas \ ((void (*)(struct vfio_device *vdev)) NULL) +#define vfio_iommufd_physical_pasid_attach_ioas \ + ((int (*)(struct vfio_device *vdev, u32 pasid, u32 *pt_id)) NULL) +#define vfio_iommufd_physical_pasid_detach_ioas \ + ((void (*)(struct vfio_device *vdev, u32 pasid)) NULL) #define vfio_iommufd_emulated_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL) @@ -262,6 +284,44 @@ static inline int vfio_check_feature(u32 flags, size_t argsz, u32 supported_ops, return 1; } +/** + * vfio_check_precopy_ioctl - Validate user input for the VFIO_MIG_GET_PRECOPY_INFO ioctl + * @vdev: The vfio device + * @cmd: Cmd from the ioctl + * @arg: Arg from the ioctl + * @info: Driver pointer to hold the userspace input to the ioctl + * + * For use in a driver's get_precopy_info. Checks that the inputs to the + * VFIO_MIG_GET_PRECOPY_INFO ioctl are correct. + + * Returns 0 on success, otherwise errno. + */ + +static inline int +vfio_check_precopy_ioctl(struct vfio_device *vdev, unsigned int cmd, + unsigned long arg, struct vfio_precopy_info *info) +{ + unsigned long minsz; + + if (cmd != VFIO_MIG_GET_PRECOPY_INFO) + return -ENOTTY; + + minsz = offsetofend(struct vfio_precopy_info, dirty_bytes); + + if (copy_from_user(info, (void __user *)arg, minsz)) + return -EFAULT; + + if (info->argsz < minsz) + return -EINVAL; + + /* keep v1 behaviour as is for compatibility reasons */ + if (vdev->precopy_info_v2) + /* flags are output, set its initial value to 0 */ + info->flags = 0; + + return 0; +} + struct vfio_device *_vfio_alloc_device(size_t size, struct device *dev, const struct vfio_device_ops *ops); #define vfio_alloc_device(dev_struct, member, dev, ops) \ @@ -279,6 +339,8 @@ static inline void vfio_put_device(struct vfio_device *device) int vfio_register_group_dev(struct vfio_device *device); int vfio_register_emulated_iommu_dev(struct vfio_device *device); void vfio_unregister_group_dev(struct vfio_device *device); +bool vfio_device_try_get_registration(struct vfio_device *device); +void vfio_device_put_registration(struct vfio_device *device); int vfio_assign_device_set(struct vfio_device *device, void *set_id); unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set); |