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iommu/amd: Update Alias-DTE in update_device_table()

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commit 3254de6bf74fe94c197c9f819fe62a3a3c36f073 upstream.

Not doing so might cause IO-Page-Faults when a device uses
an alias request-id and the alias-dte is left in a lower
page-mode which does not cover the address allocated from
the iova-allocator.

Fixes: 492667dacc ('x86/amd-iommu: Remove amd_iommu_pd_table')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joerg Roedel 2016-07-26 15:18:54 +02:00 committed by Greg Kroah-Hartman
parent df8eaed225
commit c5612d4370
1 changed files with 8 additions and 1 deletions
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9
drivers/iommu/amd_iommu.c
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@ -2324,8 +2324,15 @@ static void update_device_table(struct protection_domain *domain)
{ {
struct iommu_dev_data *dev_data; struct iommu_dev_data *dev_data;
list_for_each_entry(dev_data, &domain->dev_list, list) list_for_each_entry(dev_data, &domain->dev_list, list) {
set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled); set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled);
if (dev_data->devid == dev_data->alias)
continue;
/* There is an alias, update device table entry for it */
set_dte_entry(dev_data->alias, domain, dev_data->ats.enabled);
}
} }
static void update_domain(struct protection_domain *domain) static void update_domain(struct protection_domain *domain)