This is a note to let you know that I've just added the patch titled
iommu/amd: Update Alias-DTE in update_device_table()
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-amd-update-alias-dte-in-update_device_table.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3254de6bf74fe94c197c9f819fe62a3a3c36f073 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@xxxxxxx>
Date: Tue, 26 Jul 2016 15:18:54 +0200
Subject: iommu/amd: Update Alias-DTE in update_device_table()
From: Joerg Roedel <jroedel@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/amd_iommu.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2324,8 +2324,15 @@ static void update_device_table(struct p
{
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)
Patches currently in stable-queue which might be from jroedel@xxxxxxx are
queue-4.4/iommu-amd-handle-iommu_domain_dma-in-ops-domain_free-call-back.patch
queue-4.4/iommu-amd-update-alias-dte-in-update_device_table.patch
queue-4.4/iommu-amd-init-unity-mappings-only-for-dma_ops-domains.patch
queue-4.4/iommu-vt-d-return-error-code-in-domain_context_mapping_one.patch
queue-4.4/iommu-exynos-suppress-unbinding-to-prevent-system-failure.patch
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