vfio iommu type1: Add find_iommu_group() function (7896c998) · Commits · 戴 / test

drivers/vfio/vfio_iommu_type1.c

+33 −24

Original line number	Diff line number	Diff line
		@@ -752,11 +752,24 @@ static void vfio_test_domain_fgsp(struct vfio_domain *domain)
		__free_pages(pages, order);
		}

		static struct vfio_group find_iommu_group(struct vfio_domain domain,
		struct iommu_group *iommu_group)
		{
		struct vfio_group *g;

		list_for_each_entry(g, &domain->group_list, next) {
		if (g->iommu_group == iommu_group)
		return g;
		}

		return NULL;
		}

		static int vfio_iommu_type1_attach_group(void *iommu_data,
		struct iommu_group *iommu_group)
		{
		struct vfio_iommu *iommu = iommu_data;
		struct vfio_group group, g;
		struct vfio_group *group;
		struct vfio_domain domain, d;
		struct bus_type *bus = NULL;
		int ret;
		@@ -764,10 +777,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
		mutex_lock(&iommu->lock);

		list_for_each_entry(d, &iommu->domain_list, next) {
		list_for_each_entry(g, &d->group_list, next) {
		if (g->iommu_group != iommu_group)
		continue;

		if (find_iommu_group(d, iommu_group)) {
		mutex_unlock(&iommu->lock);
		return -EINVAL;
		}
		@@ -887,8 +897,8 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
		mutex_lock(&iommu->lock);

		list_for_each_entry(domain, &iommu->domain_list, next) {
		list_for_each_entry(group, &domain->group_list, next) {
		if (group->iommu_group != iommu_group)
		group = find_iommu_group(domain, iommu_group);
		if (!group)
		continue;

		iommu_detach_group(domain->domain, iommu_group);
		@@ -908,7 +918,6 @@ static void vfio_iommu_type1_detach_group(void *iommu_data,
		}
		goto done;
		}
		}

		done:
		mutex_unlock(&iommu->lock);