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vfio: Compile vfio_group infrastructure optionally

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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>
This commit is contained in:
Yi Liu
2023-07-18 06:55:50 -07:00
committed by Alex Williamson
parent 5398be2564
commit c1cce6d079
5 changed files with 123 additions and 12 deletions
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25
include/linux/vfio.h
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@@ -43,7 +43,11 @@ struct vfio_device {
*/
const struct vfio_migration_ops *mig_ops;
const struct vfio_log_ops *log_ops;
#if IS_ENABLED(CONFIG_VFIO_GROUP)
struct vfio_group *group;
struct list_head group_next;
struct list_head iommu_entry;
#endif
struct vfio_device_set *dev_set;
struct list_head dev_set_list;
unsigned int migration_flags;
@@ -58,8 +62,6 @@ struct vfio_device {
refcount_t refcount; /* user count on registered device*/
unsigned int open_count;
struct completion comp;
struct list_head group_next;
struct list_head iommu_entry;
struct iommufd_access *iommufd_access;
void (*put_kvm)(struct kvm *kvm);
#if IS_ENABLED(CONFIG_IOMMUFD)
@@ -284,12 +286,29 @@ int vfio_mig_get_next_state(struct vfio_device *device,
/*
* External user API
*/
#if IS_ENABLED(CONFIG_VFIO_GROUP)
struct iommu_group *vfio_file_iommu_group(struct file *file);
bool vfio_file_is_group(struct file *file);
bool vfio_file_has_dev(struct file *file, struct vfio_device *device);
#else
static inline struct iommu_group *vfio_file_iommu_group(struct file *file)
{
return NULL;
}
static inline bool vfio_file_is_group(struct file *file)
{
return false;
}
static inline bool vfio_file_has_dev(struct file *file, struct vfio_device *device)
{
return false;
}
#endif
bool vfio_file_is_valid(struct file *file);
bool vfio_file_enforced_coherent(struct file *file);
void vfio_file_set_kvm(struct file *file, struct kvm *kvm);
bool vfio_file_has_dev(struct file *file, struct vfio_device *device);
#define VFIO_PIN_PAGES_MAX_ENTRIES (PAGE_SIZE/sizeof(unsigned long))