From: James Morse <james.morse@arm.com> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC03L1 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/commit/?h=mp... -------------------------------- To walk the list of iommu groups visible in sysfs, resctrl needs access to iommu_group_kset. Expose it. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/iommu/iommu.c | 5 +++++ include/linux/iommu.h | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index faffa07c5e88..98397cbb8b9b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1050,6 +1050,11 @@ struct iommu_group *iommu_group_get_by_id(int id) } EXPORT_SYMBOL_GPL(iommu_group_get_by_id); +struct kset *iommu_get_group_kset(void) +{ + return kset_get(iommu_group_kset); +} + /** * iommu_group_get_iommudata - retrieve iommu_data registered for a group * @group: the group diff --git a/include/linux/iommu.h b/include/linux/iommu.h index f0585e004e9e..919514bb1231 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -1028,6 +1028,7 @@ extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group); extern void iommu_group_put(struct iommu_group *group); extern int iommu_group_id(struct iommu_group *group); +struct kset *iommu_get_group_kset(void); extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *); int iommu_set_pgtable_quirks(struct iommu_domain *domain, @@ -1490,6 +1491,11 @@ static inline int iommu_group_id(struct iommu_group *group) return -ENODEV; } +static inline struct kset *iommu_get_group_kset(void) +{ + return NULL; +} + static inline int iommu_set_pgtable_quirks(struct iommu_domain *domain, unsigned long quirks) { -- 2.25.1