tree e4f92da3f9b6f9e0d06b409d7d8340faba965f4f
parent 7d2aa6b814476a2e2794960f844344519246df72
author Marek Szyprowski <m.szyprowski@samsung.com> 1490001477 +0100
committer Joerg Roedel <jroedel@suse.de> 1490194245 +0100

iommu/exynos: Workaround FLPD cache flush issues for SYSMMU v5

For some unknown reasons, in some cases, FLPD cache invalidation doesn't
work properly with SYSMMU v5 controllers found in Exynos5433 SoCs. This
can be observed by a firmware crash during initialization phase of MFC
video decoder available in the mentioned SoCs when IOMMU support is
enabled. To workaround this issue perform a full TLB/FLPD invalidation
in case of replacing any first level page descriptors in case of SYSMMU v5.

Fixes: 740a01eee9ada ("iommu/exynos: Add support for v5 SYSMMU")
CC: stable@vger.kernel.org # v4.10+
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>