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| author | Cho KyongHo <pullip.cho@samsung.com> | 2014-05-12 10:14:51 +0400 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-05-13 21:12:53 +0400 |
| commit | 6cb47ed7397e0881afede05161ccaf5b70f95414 (patch) | |
| tree | 918fea1ffd1e599804adfce007be30759323a59e /drivers/iommu/exynos-iommu.c | |
| parent | 8f8fcf970e5866150af98233ae7ebf25ffe8cba7 (diff) | |
| download | linux-6cb47ed7397e0881afede05161ccaf5b70f95414.tar.xz | |
iommu/exynos: Add missing cache flush for removed page table entries
This commit adds cache flush for removed small and large page entries
in exynos_iommu_unmap(). Missing cache flush of removed page table
entries can cause missing page fault interrupt when a master IP
accesses an unmapped area.
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Tested-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 4fc31fc6a49a..6915235f9e86 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -904,6 +904,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, if (lv2ent_small(ent)) { *ent = 0; size = SPAGE_SIZE; + pgtable_flush(ent, ent + 1); priv->lv2entcnt[lv1ent_offset(iova)] += 1; goto done; } @@ -915,6 +916,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, } memset(ent, 0, sizeof(*ent) * SPAGES_PER_LPAGE); + pgtable_flush(ent, ent + SPAGES_PER_LPAGE); size = LPAGE_SIZE; priv->lv2entcnt[lv1ent_offset(iova)] += SPAGES_PER_LPAGE; |