Now, an IOMMU driver can use viommu to invalidate a device cache via the viommu_cache_invalidate op. Very likely, this would require the driver to lookup a virtual device ID for a physical device (or just its ID). Since the core already has a helper, make it public.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- drivers/iommu/iommufd/viommu.c | 2 +- include/linux/iommufd.h | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index ada9f968b9f6..2304f199b033 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -148,7 +148,7 @@ int iommufd_viommu_set_vdev_id(struct iommufd_ucmd *ucmd) return rc; }
-static struct device * +struct device * iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id) { struct iommufd_vdev_id *vdev_id; diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 7da5140fa1b0..e0d7a53acbd5 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -89,6 +89,8 @@ int iommufd_access_rw(struct iommufd_access *access, unsigned long iova, int iommufd_vfio_compat_ioas_get_id(struct iommufd_ctx *ictx, u32 *out_ioas_id); int iommufd_vfio_compat_ioas_create(struct iommufd_ctx *ictx); int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx); +struct device * +iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id); #else /* !CONFIG_IOMMUFD */ static inline struct iommufd_ctx *iommufd_ctx_from_file(struct file *file) { @@ -129,5 +131,11 @@ static inline int iommufd_vfio_compat_set_no_iommu(struct iommufd_ctx *ictx) { return -EOPNOTSUPP; } + +static inline struct device * +iommufd_viommu_find_device(struct iommufd_viommu *viommu, u64 id) +{ + return NULL; +} #endif /* CONFIG_IOMMUFD */ #endif