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iommu/vt-d: Allocate si_domain in init_dmars()

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This seperates the allocation of the si_domain from its
assignment to devices. It makes sure that the iommu=pt case
still works in the kdump kernel, when we have to defer the
assignment of devices to domains to device driver
initialization time.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-06-12 12:27:16 +02:00
parent cf484d0e69
commit 86080ccc22
1 changed files with 7 additions and 5 deletions
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12
drivers/iommu/intel-iommu.c
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@ -2763,10 +2763,6 @@ static int __init iommu_prepare_static_identity_mapping(int hw)
int i;
int ret = 0;
ret = si_domain_init(hw);
if (ret)
return -EFAULT;
for_each_pci_dev(pdev) {
ret = dev_prepare_static_identity_mapping(&pdev->dev, hw);
if (ret)
@ -2780,7 +2776,7 @@ static int __init iommu_prepare_static_identity_mapping(int hw)
if (dev->bus != &acpi_bus_type)
continue;
adev= to_acpi_device(dev);
mutex_lock(&adev->physical_node_lock);
list_for_each_entry(pn, &adev->physical_node_list, node) {
@ -3114,6 +3110,12 @@ static int __init init_dmars(void)
iommu_identity_mapping |= IDENTMAP_GFX;
#endif
if (iommu_identity_mapping) {
ret = si_domain_init(hw_pass_through);
if (ret)
goto free_iommu;
}
check_tylersburg_isoch();
/*