This is a note to let you know that I've just added the patch titled
iommu/vt-d: Tylersburg isoch identity map check is done too late.
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-vt-d-tylersburg-isoch-identity-map-check-is-done-too-late.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 21e722c4c8377b5bc82ad058fed12165af739c1b Mon Sep 17 00:00:00 2001
From: Ashok Raj <ashok.raj@xxxxxxxxx>
Date: Mon, 30 Jan 2017 09:39:53 -0800
Subject: iommu/vt-d: Tylersburg isoch identity map check is done too late.
From: Ashok Raj <ashok.raj@xxxxxxxxx>
commit 21e722c4c8377b5bc82ad058fed12165af739c1b upstream.
The check to set identity map for tylersburg is done too late. It needs
to be done before the check for identity_map domain is done.
To: Joerg Roedel <joro@xxxxxxxxxx>
To: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: Ashok Raj <ashok.raj@xxxxxxxxx>
Fixes: 86080ccc22 ("iommu/vt-d: Allocate si_domain in init_dmars()")
Signed-off-by: Ashok Raj <ashok.raj@xxxxxxxxx>
Reported-by: Yunhong Jiang <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3238,13 +3238,14 @@ static int __init init_dmars(void)
iommu_identity_mapping |= IDENTMAP_GFX;
#endif
+ check_tylersburg_isoch();
+
if (iommu_identity_mapping) {
ret = si_domain_init(hw_pass_through);
if (ret)
goto free_iommu;
}
- check_tylersburg_isoch();
/*
* If we copied translations from a previous kernel in the kdump
Patches currently in stable-queue which might be from ashok.raj@xxxxxxxxx are
queue-4.4/iommu-vt-d-fix-some-macros-that-are-incorrectly-specified-in-intel-iommu.patch
queue-4.4/iommu-vt-d-tylersburg-isoch-identity-map-check-is-done-too-late.patch