diff options
author | Yi Liu <yi.l.liu@intel.com> | 2023-07-18 16:55:50 +0300 |
---|---|---|
committer | Alex Williamson <alex.williamson@redhat.com> | 2023-07-25 19:20:50 +0300 |
commit | c1cce6d079b875396c9a7c6838fc5b024758e540 (patch) | |
tree | 89afdead8174a8d4e0c297f00ee8d4fef862b640 /drivers/vfio/vfio.h | |
parent | 5398be2564ebf761373c0d003246490e529da21a (diff) | |
download | linux-c1cce6d079b875396c9a7c6838fc5b024758e540.tar.xz |
vfio: Compile vfio_group infrastructure optionally
vfio_group is not needed for vfio device cdev, so with vfio device cdev
introduced, the vfio_group infrastructures can be compiled out if only
cdev is needed.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718135551.6592-26-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.h')
-rw-r--r-- | drivers/vfio/vfio.h | 89 |
1 files changed, 83 insertions, 6 deletions
diff --git a/drivers/vfio/vfio.h b/drivers/vfio/vfio.h index 8353774a5d07..307e3f29b527 100644 --- a/drivers/vfio/vfio.h +++ b/drivers/vfio/vfio.h @@ -36,6 +36,12 @@ vfio_allocate_device_file(struct vfio_device *device); extern const struct file_operations vfio_device_fops; +#ifdef CONFIG_VFIO_NOIOMMU +extern bool vfio_noiommu __read_mostly; +#else +enum { vfio_noiommu = false }; +#endif + enum vfio_group_type { /* * Physical device with IOMMU backing. @@ -60,6 +66,7 @@ enum vfio_group_type { VFIO_NO_IOMMU, }; +#if IS_ENABLED(CONFIG_VFIO_GROUP) struct vfio_group { struct device dev; struct cdev cdev; @@ -111,6 +118,82 @@ static inline bool vfio_device_is_noiommu(struct vfio_device *vdev) return IS_ENABLED(CONFIG_VFIO_NOIOMMU) && vdev->group->type == VFIO_NO_IOMMU; } +#else +struct vfio_group; + +static inline int vfio_device_block_group(struct vfio_device *device) +{ + return 0; +} + +static inline void vfio_device_unblock_group(struct vfio_device *device) +{ +} + +static inline int vfio_device_set_group(struct vfio_device *device, + enum vfio_group_type type) +{ + return 0; +} + +static inline void vfio_device_remove_group(struct vfio_device *device) +{ +} + +static inline void vfio_device_group_register(struct vfio_device *device) +{ +} + +static inline void vfio_device_group_unregister(struct vfio_device *device) +{ +} + +static inline int vfio_device_group_use_iommu(struct vfio_device *device) +{ + return -EOPNOTSUPP; +} + +static inline void vfio_device_group_unuse_iommu(struct vfio_device *device) +{ +} + +static inline void vfio_df_group_close(struct vfio_device_file *df) +{ +} + +static inline struct vfio_group *vfio_group_from_file(struct file *file) +{ + return NULL; +} + +static inline bool vfio_group_enforced_coherent(struct vfio_group *group) +{ + return true; +} + +static inline void vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm) +{ +} + +static inline bool vfio_device_has_container(struct vfio_device *device) +{ + return false; +} + +static inline int __init vfio_group_init(void) +{ + return 0; +} + +static inline void vfio_group_cleanup(void) +{ +} + +static inline bool vfio_device_is_noiommu(struct vfio_device *vdev) +{ + return false; +} +#endif /* CONFIG_VFIO_GROUP */ #if IS_ENABLED(CONFIG_VFIO_CONTAINER) /** @@ -351,12 +434,6 @@ static inline void vfio_virqfd_exit(void) } #endif -#ifdef CONFIG_VFIO_NOIOMMU -extern bool vfio_noiommu __read_mostly; -#else -enum { vfio_noiommu = false }; -#endif - #ifdef CONFIG_HAVE_KVM void vfio_device_get_kvm_safe(struct vfio_device *device, struct kvm *kvm); void vfio_device_put_kvm(struct vfio_device *device); |