Commit 6cb47ed7 authored by Cho KyongHo's avatar Cho KyongHo Committed by Joerg Roedel

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: default avatarTomasz Figa <t.figa@samsung.com>
Tested-by: default avatarGrant Grundler <grundler@chromium.org>
Signed-off-by: default avatarCho KyongHo <pullip.cho@samsung.com>
Signed-off-by: default avatarShaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 8f8fcf97
...@@ -904,6 +904,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, ...@@ -904,6 +904,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain,
if (lv2ent_small(ent)) { if (lv2ent_small(ent)) {
*ent = 0; *ent = 0;
size = SPAGE_SIZE; size = SPAGE_SIZE;
pgtable_flush(ent, ent + 1);
priv->lv2entcnt[lv1ent_offset(iova)] += 1; priv->lv2entcnt[lv1ent_offset(iova)] += 1;
goto done; goto done;
} }
...@@ -915,6 +916,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, ...@@ -915,6 +916,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain,
} }
memset(ent, 0, sizeof(*ent) * SPAGES_PER_LPAGE); memset(ent, 0, sizeof(*ent) * SPAGES_PER_LPAGE);
pgtable_flush(ent, ent + SPAGES_PER_LPAGE);
size = LPAGE_SIZE; size = LPAGE_SIZE;
priv->lv2entcnt[lv1ent_offset(iova)] += SPAGES_PER_LPAGE; priv->lv2entcnt[lv1ent_offset(iova)] += SPAGES_PER_LPAGE;
......
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