}
EXPORT_SYMBOL_GPL(iommu_present);
+bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
+{
+ if (!bus->iommu_ops || !bus->iommu_ops->capable)
+ return false;
+
+ return bus->iommu_ops->capable(cap);
+}
+EXPORT_SYMBOL_GPL(iommu_capable);
+
/**
* iommu_set_fault_handler() - set a fault handler for an iommu domain
* @domain: iommu domain
int iommu_domain_has_cap(struct iommu_domain *domain,
enum iommu_cap cap)
{
- if (unlikely(domain->ops->domain_has_cap == NULL))
- return 0;
+ if (domain->ops->domain_has_cap != NULL)
+ return domain->ops->domain_has_cap(domain, cap);
+
+ if (domain->ops->capable != NULL)
+ return domain->ops->capable(cap);
- return domain->ops->domain_has_cap(domain, cap);
+ return 0;
}
EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
* @pgsize_bitmap: bitmap of supported page sizes
*/
struct iommu_ops {
+ bool (*capable)(enum iommu_cap);
int (*domain_init)(struct iommu_domain *domain);
void (*domain_destroy)(struct iommu_domain *domain);
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
extern bool iommu_present(struct bus_type *bus);
+extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
extern struct iommu_group *iommu_group_get_by_id(int id);
extern void iommu_domain_free(struct iommu_domain *domain);
return false;
}
+static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
+{
+ return false;
+}
+
static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
return NULL;