Commit 1ac4cbbc authored by Joerg Roedel's avatar Joerg Roedel

AMD IOMMU: allocate a new protection for hotplugged devices

Impact: also hotplug devices benefit from device isolation
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent e2dc14a2
......@@ -923,6 +923,8 @@ static int device_change_notifier(struct notifier_block *nb,
struct protection_domain *domain;
struct dma_ops_domain *dma_domain;
struct amd_iommu *iommu;
int order = amd_iommu_aperture_order;
unsigned long flags;
if (devid > amd_iommu_last_bdf)
goto out;
......@@ -954,6 +956,21 @@ static int device_change_notifier(struct notifier_block *nb,
if (!domain)
goto out;
detach_device(domain, devid);
break;
case BUS_NOTIFY_ADD_DEVICE:
/* allocate a protection domain if a device is added */
dma_domain = find_protection_domain(devid);
if (dma_domain)
goto out;
dma_domain = dma_ops_domain_alloc(iommu, order);
if (!dma_domain)
goto out;
dma_domain->target_dev = devid;
spin_lock_irqsave(&iommu_pd_list_lock, flags);
list_add_tail(&dma_domain->list, &iommu_pd_list);
spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
break;
default:
goto out;
......
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