From ce2eb8f44e60c748fac56ede46b526fdac773e1b Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Fri, 21 Jul 2017 13:12:35 +0100 Subject: [PATCH] iommu/msm: Add iommu_group support As the last step to making groups mandatory, clean up the remaining drivers by adding basic support. Whilst it may not perfectly reflect the isolation capabilities of the hardware, using generic_device_group() should at least maintain existing behaviour with respect to the API. Signed-off-by: Robin Murphy Signed-off-by: Joerg Roedel --- drivers/iommu/msm_iommu.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index d0448353d501..04f4d51ffacb 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -393,6 +393,7 @@ static struct msm_iommu_dev *find_iommu_for_dev(struct device *dev) static int msm_iommu_add_device(struct device *dev) { struct msm_iommu_dev *iommu; + struct iommu_group *group; unsigned long flags; int ret = 0; @@ -406,7 +407,16 @@ static int msm_iommu_add_device(struct device *dev) spin_unlock_irqrestore(&msm_iommu_lock, flags); - return ret; + if (ret) + return ret; + + group = iommu_group_get_for_dev(dev); + if (IS_ERR(group)) + return PTR_ERR(group); + + iommu_group_put(group); + + return 0; } static void msm_iommu_remove_device(struct device *dev) @@ -421,6 +431,8 @@ static void msm_iommu_remove_device(struct device *dev) iommu_device_unlink(&iommu->iommu, dev); spin_unlock_irqrestore(&msm_iommu_lock, flags); + + iommu_group_remove_device(dev); } static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev) @@ -700,6 +712,7 @@ static struct iommu_ops msm_iommu_ops = { .iova_to_phys = msm_iommu_iova_to_phys, .add_device = msm_iommu_add_device, .remove_device = msm_iommu_remove_device, + .device_group = generic_device_group, .pgsize_bitmap = MSM_IOMMU_PGSIZES, .of_xlate = qcom_iommu_of_xlate, };