motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 08:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

vfio: add device IO ops vector

Browse source 
For vfio-user, device operations such as IRQ handling and region
read/writes are implemented in userspace over the control socket, not
ioctl() to the vfio kernel driver; add an ops vector to generalize this,
and implement vfio_device_io_ops_ioctl for interacting with the kernel
vfio driver.

Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250507152020.1254632-11-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
John Levon 2025-05-07 16:20:15 +01:00 • committed by Cédric Le Goater
parent 9458d9b4dc
commit 38bf025d0d
5 changed files with 114 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

38
include/hw/vfio/vfio-device.h
View file

@ -41,6 +41,7 @@ enum {
};
typedef struct VFIODeviceOps VFIODeviceOps;
typedef struct VFIODeviceIOOps VFIODeviceIOOps;
typedef struct VFIOMigration VFIOMigration;
typedef struct IOMMUFDBackend IOMMUFDBackend;
@ -66,6 +67,7 @@ typedef struct VFIODevice {
OnOffAuto migration_multifd_transfer;
bool migration_events;
VFIODeviceOps *ops;
VFIODeviceIOOps *io_ops;
unsigned int num_irqs;
unsigned int num_regions;
unsigned int flags;
@ -151,6 +153,42 @@ typedef QLIST_HEAD(VFIODeviceList, VFIODevice) VFIODeviceList;
extern VFIODeviceList vfio_device_list;
#ifdef CONFIG_LINUX
/*
* How devices communicate with the server. The default option is through
* ioctl() to the kernel VFIO driver, but vfio-user can use a socket to a remote
* process.
*/
struct VFIODeviceIOOps {
/**
* @device_feature
*
* Fill in feature info for the given device.
*/
int (*device_feature)(VFIODevice *vdev, struct vfio_device_feature *);
/**
* @get_region_info
*
* Fill in @info with information on the region given by @info->index.
*/
int (*get_region_info)(VFIODevice *vdev,
struct vfio_region_info *info);
/**
* @get_irq_info
*
* Fill in @irq with information on the IRQ given by @info->index.
*/
int (*get_irq_info)(VFIODevice *vdev, struct vfio_irq_info *irq);
/**
* @set_irqs
*
* Configure IRQs as defined by @irqs.
*/
int (*set_irqs)(VFIODevice *vdev, struct vfio_irq_set *irqs);
};
void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainerBase *bcontainer,
struct vfio_device_info *info);