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authorJoerg Roedel <joerg.roedel@amd.com>2008-12-10 21:33:26 +0300
committerJoerg Roedel <joerg.roedel@amd.com>2009-01-03 16:11:56 +0300
commit1ac4cbbc5eb56de96d264d10f464ba5222815b1b (patch)
tree1d98c0382683b4c7ec40602273fed14aabf222c7 /arch
parente2dc14a2a6c9a83baaafc51f06b7e73cec2167be (diff)
downloadlinux-1ac4cbbc5eb56de96d264d10f464ba5222815b1b.tar.xz
AMD IOMMU: allocate a new protection for hotplugged devices
Impact: also hotplug devices benefit from device isolation Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index f2956546423b..f2260609eadc 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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;
@@ -955,6 +957,21 @@ static int device_change_notifier(struct notifier_block *nb,
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;
}