@@ -327,6 +327,18 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
}
EXPORT_SYMBOL_GPL(iommu_detach_device);
+int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group)
+{
+ return iommu_attach_device(domain, group->dma_dev);
+}
+EXPORT_SYMBOL_GPL(iommu_attach_group);
+
+void iommu_detach_group(struct iommu_domain *domain, struct iommu_group *group)
+{
+ iommu_detach_device(domain, group->dma_dev);
+}
+EXPORT_SYMBOL_GPL(iommu_detach_group);
+
phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova)
{
@@ -107,6 +107,10 @@ extern int iommu_attach_device(struct iommu_domain *domain,
struct device *dev);
extern void iommu_detach_device(struct iommu_domain *domain,
struct device *dev);
+extern int iommu_attach_group(struct iommu_domain *domain,
+ struct iommu_group *group);
+extern void iommu_detach_group(struct iommu_domain *domain,
+ struct iommu_group *group);
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot);
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
@@ -194,6 +198,17 @@ static inline void iommu_detach_device(struct iommu_domain *domain,
{
}
+static inline int iommu_attach_group(struct iommu_domain *domain,
+ struct iommu_group *group)
+{
+ return -ENODEV;
+}
+
+static inline void iommu_detach_group(struct iommu_domain *domain,
+ struct iommu_group *group)
+{
+}
+
static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot)
{
IOMMU ops should be working at a group level rather than a device level as we cannot arbitrarily assign devices from the same group to different domains. For now this is just a simple wrapper that makes use of the dma_dev within a group. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> --- drivers/iommu/iommu.c | 12 ++++++++++++ include/linux/iommu.h | 15 +++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-)