This is a note to let you know that I've just added the patch titled
iommu/io-pgtable-arm: Check for v7s-incapable systems
to the 4.8-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-io-pgtable-arm-check-for-v7s-incapable-systems.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 82db33dc5e49fb625262d81125625d07a0d6184e Mon Sep 17 00:00:00 2001
From: Robin Murphy <robin.murphy@xxxxxxx>
Date: Tue, 13 Sep 2016 18:02:02 +0100
Subject: iommu/io-pgtable-arm: Check for v7s-incapable systems
From: Robin Murphy <robin.murphy@xxxxxxx>
commit 82db33dc5e49fb625262d81125625d07a0d6184e upstream.
On machines with no 32-bit addressable RAM whatsoever, we shouldn't
even touch the v7s format as it's never going to work.
Fixes: e5fc9753b1a8 ("iommu/io-pgtable: Add ARMv7 short descriptor support")
Reported-by: Eric Auger <eric.auger@xxxxxxxxxx>
Tested-by: Eric Auger <eric.auger@xxxxxxxxxx>
Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/io-pgtable-arm-v7s.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -633,6 +633,10 @@ static struct io_pgtable *arm_v7s_alloc_
{
struct arm_v7s_io_pgtable *data;
+#ifdef PHYS_OFFSET
+ if (upper_32_bits(PHYS_OFFSET))
+ return NULL;
+#endif
if (cfg->ias > ARM_V7S_ADDR_BITS || cfg->oas > ARM_V7S_ADDR_BITS)
return NULL;
Patches currently in stable-queue which might be from robin.murphy@xxxxxxx are
queue-4.8/iommu-io-pgtable-arm-check-for-v7s-incapable-systems.patch
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