This is a note to let you know that I've just added the patch titled
iommu/exynos: Block SYSMMU while invalidating FLPD cache
to the 4.10-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-exynos-block-sysmmu-while-invalidating-flpd-cache.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7d2aa6b814476a2e2794960f844344519246df72 Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Date: Mon, 20 Mar 2017 10:17:56 +0100
Subject: iommu/exynos: Block SYSMMU while invalidating FLPD cache
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
commit 7d2aa6b814476a2e2794960f844344519246df72 upstream.
Documentation specifies that SYSMMU should be in blocked state while
performing TLB/FLPD cache invalidation, so add needed calls to
sysmmu_block/unblock.
Fixes: 66a7ed84b345d ("iommu/exynos: Apply workaround of caching fault page table entries")
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/exynos-iommu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -509,7 +509,10 @@ static void sysmmu_tlb_invalidate_flpdca
spin_lock_irqsave(&data->lock, flags);
if (data->active && data->version >= MAKE_MMU_VER(3, 3)) {
clk_enable(data->clk_master);
- __sysmmu_tlb_invalidate_entry(data, iova, 1);
+ if (sysmmu_block(data)) {
+ __sysmmu_tlb_invalidate_entry(data, iova, 1);
+ sysmmu_unblock(data);
+ }
clk_disable(data->clk_master);
}
spin_unlock_irqrestore(&data->lock, flags);
Patches currently in stable-queue which might be from m.szyprowski@xxxxxxxxxxx are
queue-4.10/iommu-exynos-block-sysmmu-while-invalidating-flpd-cache.patch
queue-4.10/iommu-exynos-workaround-flpd-cache-flush-issues-for-sysmmu-v5.patch