diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-09-24 18:56:52 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2021-09-30 21:46:43 +0300 |
| commit | b00621603d050f77a6af9e81e32daeccfd246d6a (patch) | |
| tree | 17ce7d0bac8c4b603eb98577f5ec4cadd059b075 /drivers/vfio/vfio.c | |
| parent | 38a68934aa72459217986cf6b461d87f7602648a (diff) | |
| download | linux-b00621603d050f77a6af9e81e32daeccfd246d6a.tar.xz | |
vfio: factor out a vfio_iommu_driver_allowed helper
Factor out a little helper to make the checks for the noiommu driver less
ugly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20210924155705.4258-3-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio.c')
| -rw-r--r-- | drivers/vfio/vfio.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index b483b61b7c22..faf8e0d637bb 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -257,8 +257,23 @@ static const struct vfio_iommu_driver_ops vfio_noiommu_ops = { .attach_group = vfio_noiommu_attach_group, .detach_group = vfio_noiommu_detach_group, }; -#endif +/* + * Only noiommu containers can use vfio-noiommu and noiommu containers can only + * use vfio-noiommu. + */ +static inline bool vfio_iommu_driver_allowed(struct vfio_container *container, + const struct vfio_iommu_driver *driver) +{ + return container->noiommu == (driver->ops == &vfio_noiommu_ops); +} +#else +static inline bool vfio_iommu_driver_allowed(struct vfio_container *container, + const struct vfio_iommu_driver *driver) +{ + return true; +} +#endif /* CONFIG_VFIO_NOIOMMU */ /** * IOMMU driver registration @@ -1034,13 +1049,10 @@ static long vfio_ioctl_check_extension(struct vfio_container *container, list_for_each_entry(driver, &vfio.iommu_drivers_list, vfio_next) { -#ifdef CONFIG_VFIO_NOIOMMU if (!list_empty(&container->group_list) && - (container->noiommu != - (driver->ops == &vfio_noiommu_ops))) + !vfio_iommu_driver_allowed(container, + driver)) continue; -#endif - if (!try_module_get(driver->ops->owner)) continue; @@ -1112,15 +1124,8 @@ static long vfio_ioctl_set_iommu(struct vfio_container *container, list_for_each_entry(driver, &vfio.iommu_drivers_list, vfio_next) { void *data; -#ifdef CONFIG_VFIO_NOIOMMU - /* - * Only noiommu containers can use vfio-noiommu and noiommu - * containers can only use vfio-noiommu. - */ - if (container->noiommu != (driver->ops == &vfio_noiommu_ops)) + if (!vfio_iommu_driver_allowed(container, driver)) continue; -#endif - if (!try_module_get(driver->ops->owner)) continue; |