diff options
| author | Joerg Roedel <jroedel@suse.de> | 2016-07-26 15:18:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-20 18:09:21 +0200 |
| commit | c5612d4370098aa0528dfe20cc5698acaf94c4af (patch) | |
| tree | 328ecc7075db58e3f624ea5a9a739f0da6b78a4e /drivers/iommu | |
| parent | df8eaed22590a484a64e4a6f2af266f59a692aed (diff) | |
iommu/amd: Update Alias-DTE in update_device_table()
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: 492667dacc0a ('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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index e54e335d082b..0397985a2601 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2324,8 +2324,15 @@ static void update_device_table(struct protection_domain *domain) { 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); + + 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) |