@ -217,6 +217,7 @@ struct vfio_device_info {
__u32 num_regions ; /* Max region index + 1 */
__u32 num_irqs ; /* Max IRQ index + 1 */
__u32 cap_offset ; /* Offset within info struct of first cap */
__u32 pad ;
} ;
# define VFIO_DEVICE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 7)
@ -677,11 +678,60 @@ enum {
* VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IOWR ( VFIO_TYPE , VFIO_BASE + 12 ,
* struct vfio_pci_hot_reset_info )
*
* This command is used to query the affected devices in the hot reset for
* a given device .
*
* This command always reports the segment , bus , and devfn information for
* each affected device , and selectively reports the group_id or devid per
* the way how the calling device is opened .
*
* - If the calling device is opened via the traditional group / container
* API , group_id is reported . User should check if it has owned all
* the affected devices and provides a set of group fds to prove the
* ownership in VFIO_DEVICE_PCI_HOT_RESET ioctl .
*
* - If the calling device is opened as a cdev , devid is reported .
* Flag VFIO_PCI_HOT_RESET_FLAG_DEV_ID is set to indicate this
* data type . All the affected devices should be represented in
* the dev_set , ex . bound to a vfio driver , and also be owned by
* this interface which is determined by the following conditions :
* 1 ) Has a valid devid within the iommufd_ctx of the calling device .
* Ownership cannot be determined across separate iommufd_ctx and
* the cdev calling conventions do not support a proof - of - ownership
* model as provided in the legacy group interface . In this case
* valid devid with value greater than zero is provided in the return
* structure .
* 2 ) Does not have a valid devid within the iommufd_ctx of the calling
* device , but belongs to the same IOMMU group as the calling device
* or another opened device that has a valid devid within the
* iommufd_ctx of the calling device . This provides implicit ownership
* for devices within the same DMA isolation context . In this case
* the devid value of VFIO_PCI_DEVID_OWNED is provided in the return
* structure .
*
* A devid value of VFIO_PCI_DEVID_NOT_OWNED is provided in the return
* structure for affected devices where device is NOT represented in the
* dev_set or ownership is not available . Such devices prevent the use
* of VFIO_DEVICE_PCI_HOT_RESET ioctl outside of the proof - of - ownership
* calling conventions ( ie . via legacy group accessed devices ) . Flag
* VFIO_PCI_HOT_RESET_FLAG_DEV_ID_OWNED would be set when all the
* affected devices are represented in the dev_set and also owned by
* the user . This flag is available only when
* flag VFIO_PCI_HOT_RESET_FLAG_DEV_ID is set , otherwise reserved .
* When set , user could invoke VFIO_DEVICE_PCI_HOT_RESET with a zero
* length fd array on the calling device as the ownership is validated
* by iommufd_ctx .
*
* Return : 0 on success , - errno on failure :
* - enospc = insufficient buffer , - enodev = unsupported for device .
*/
struct vfio_pci_dependent_device {
__u32 group_id ;
union {
__u32 group_id ;
__u32 devid ;
# define VFIO_PCI_DEVID_OWNED 0
# define VFIO_PCI_DEVID_NOT_OWNED -1
} ;
__u16 segment ;
__u8 bus ;
__u8 devfn ; /* Use PCI_SLOT/PCI_FUNC */
@ -690,6 +740,8 @@ struct vfio_pci_dependent_device {
struct vfio_pci_hot_reset_info {
__u32 argsz ;
__u32 flags ;
# define VFIO_PCI_HOT_RESET_FLAG_DEV_ID (1 << 0)
# define VFIO_PCI_HOT_RESET_FLAG_DEV_ID_OWNED (1 << 1)
__u32 count ;
struct vfio_pci_dependent_device devices [ ] ;
} ;
@ -700,6 +752,24 @@ struct vfio_pci_hot_reset_info {
* VFIO_DEVICE_PCI_HOT_RESET - _IOW ( VFIO_TYPE , VFIO_BASE + 13 ,
* struct vfio_pci_hot_reset )
*
* A PCI hot reset results in either a bus or slot reset which may affect
* other devices sharing the bus / slot . The calling user must have
* ownership of the full set of affected devices as determined by the
* VFIO_DEVICE_GET_PCI_HOT_RESET_INFO ioctl .
*
* When called on a device file descriptor acquired through the vfio
* group interface , the user is required to provide proof of ownership
* of those affected devices via the group_fds array in struct
* vfio_pci_hot_reset .
*
* When called on a direct cdev opened vfio device , the flags field of
* struct vfio_pci_hot_reset_info reports the ownership status of the
* affected devices and this ioctl must be called with an empty group_fds
* array . See above INFO ioctl definition for ownership requirements .
*
* Mixed usage of legacy groups and cdevs across the set of affected
* devices is not supported .
*
* Return : 0 on success , - errno on failure .
*/
struct vfio_pci_hot_reset {
@ -828,6 +898,83 @@ struct vfio_device_feature {
# define VFIO_DEVICE_FEATURE _IO(VFIO_TYPE, VFIO_BASE + 17)
/*
* VFIO_DEVICE_BIND_IOMMUFD - _IOR ( VFIO_TYPE , VFIO_BASE + 18 ,
* struct vfio_device_bind_iommufd )
* @ argsz : User filled size of this data .
* @ flags : Must be 0.
* @ iommufd : iommufd to bind .
* @ out_devid : The device id generated by this bind . devid is a handle for
* this device / iommufd bond and can be used in IOMMUFD commands .
*
* Bind a vfio_device to the specified iommufd .
*
* User is restricted from accessing the device before the binding operation
* is completed . Only allowed on cdev fds .
*
* Unbind is automatically conducted when device fd is closed .
*
* Return : 0 on success , - errno on failure .
*/
struct vfio_device_bind_iommufd {
__u32 argsz ;
__u32 flags ;
__s32 iommufd ;
__u32 out_devid ;
} ;
# define VFIO_DEVICE_BIND_IOMMUFD _IO(VFIO_TYPE, VFIO_BASE + 18)
/*
* VFIO_DEVICE_ATTACH_IOMMUFD_PT - _IOW ( VFIO_TYPE , VFIO_BASE + 19 ,
* struct vfio_device_attach_iommufd_pt )
* @ argsz : User filled size of this data .
* @ flags : Must be 0.
* @ pt_id : Input the target id which can represent an ioas or a hwpt
* allocated via iommufd subsystem .
* Output the input ioas id or the attached hwpt id which could
* be the specified hwpt itself or a hwpt automatically created
* for the specified ioas by kernel during the attachment .
*
* Associate the device with an address space within the bound iommufd .
* Undo by VFIO_DEVICE_DETACH_IOMMUFD_PT or device fd close . This is only
* allowed on cdev fds .
*
* If a vfio device is currently attached to a valid hw_pagetable , without doing
* a VFIO_DEVICE_DETACH_IOMMUFD_PT , a second VFIO_DEVICE_ATTACH_IOMMUFD_PT ioctl
* passing in another hw_pagetable ( hwpt ) id is allowed . This action , also known
* as a hw_pagetable replacement , will replace the device ' s currently attached
* hw_pagetable with a new hw_pagetable corresponding to the given pt_id .
*
* Return : 0 on success , - errno on failure .
*/
struct vfio_device_attach_iommufd_pt {
__u32 argsz ;
__u32 flags ;
__u32 pt_id ;
} ;
# define VFIO_DEVICE_ATTACH_IOMMUFD_PT _IO(VFIO_TYPE, VFIO_BASE + 19)
/*
* VFIO_DEVICE_DETACH_IOMMUFD_PT - _IOW ( VFIO_TYPE , VFIO_BASE + 20 ,
* struct vfio_device_detach_iommufd_pt )
* @ argsz : User filled size of this data .
* @ flags : Must be 0.
*
* Remove the association of the device and its current associated address
* space . After it , the device should be in a blocking DMA state . This is only
* allowed on cdev fds .
*
* Return : 0 on success , - errno on failure .
*/
struct vfio_device_detach_iommufd_pt {
__u32 argsz ;
__u32 flags ;
} ;
# define VFIO_DEVICE_DETACH_IOMMUFD_PT _IO(VFIO_TYPE, VFIO_BASE + 20)
/*
* Provide support for setting a PCI VF Token , which is used as a shared
* secret between PF and VF drivers . This feature may only be set on a
@ -1304,6 +1451,7 @@ struct vfio_iommu_type1_info {
# define VFIO_IOMMU_INFO_CAPS (1 << 1) /* Info supports caps */
__u64 iova_pgsizes ; /* Bitmap of supported page sizes */
__u32 cap_offset ; /* Offset within info struct of first cap */
__u32 pad ;
} ;
/*
Thomas Huth
3 years ago