Commit 7896c998 authored by Kirti Wankhede's avatar Kirti Wankhede Committed by Alex Williamson

vfio iommu type1: Add find_iommu_group() function

Add find_iommu_group()
Signed-off-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: default avatarNeo Jia <cjia@nvidia.com>
Reviewed-by: default avatarJike Song <jike.song@intel.com>
Reviewed-by: default avatarDong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent ea85cf35
......@@ -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;
}
......@@ -887,27 +897,26 @@ 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)
continue;
group = find_iommu_group(domain, iommu_group);
if (!group)
continue;
iommu_detach_group(domain->domain, iommu_group);
list_del(&group->next);
kfree(group);
/*
* Group ownership provides privilege, if the group
* list is empty, the domain goes away. If it's the
* last domain, then all the mappings go away too.
*/
if (list_empty(&domain->group_list)) {
if (list_is_singular(&iommu->domain_list))
vfio_iommu_unmap_unpin_all(iommu);
iommu_domain_free(domain->domain);
list_del(&domain->next);
kfree(domain);
}
goto done;
iommu_detach_group(domain->domain, iommu_group);
list_del(&group->next);
kfree(group);
/*
* Group ownership provides privilege, if the group
* list is empty, the domain goes away. If it's the
* last domain, then all the mappings go away too.
*/
if (list_empty(&domain->group_list)) {
if (list_is_singular(&iommu->domain_list))
vfio_iommu_unmap_unpin_all(iommu);
iommu_domain_free(domain->domain);
list_del(&domain->next);
kfree(domain);
}
goto done;
}
done:
......
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