Alex Williamson ca9c5a9c9b iommu/amd: Only unmap large pages from the first pte ... commit 60d0ca3cfd upstream. If we use a large mapping, the expectation is that only unmaps from the first pte in the superpage are supported. Unmaps from offsets into the superpage should fail (ie. return zero sized unmap). In the current code, unmapping from an offset clears the size of the full mapping starting from an offset. For instance, if we map a 16k physically contiguous range at IOVA 0x0 with a large page, then attempt to unmap 4k at offset 12k, 4 ptes are cleared (12k - 28k) and the unmap returns 16k unmapped. This potentially incorrectly clears valid mappings and confuses drivers like VFIO that use the unmap size to release pinned pages. Fix by refusing to unmap from offsets into the page. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Joerg Roedel <joro@8bytes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-07-28 16:25:47 -07:00
..
amd_iommu.c	iommu/amd: Only unmap large pages from the first pte	2013-07-28 16:25:47 -07:00
amd_iommu_init.c	iommu/amd: Initialize device table after dma_ops	2013-03-04 06:06:37 +08:00
amd_iommu_proto.h
amd_iommu_types.h	iommu/amd: Re-enable IOMMU event log interrupt after handling.	2013-06-07 12:49:35 -07:00
amd_iommu_v2.c	iommu/amd: Add missing spin_lock initialization	2012-08-09 08:31:31 -07:00
dmar.c
intel-iommu.c	intel/iommu: force writebuffer-flush quirk on Gen 4 Chipsets	2013-02-28 06:59:03 -08:00
intr_remapping.c	irq_remap: disable IRQ remapping if any IOAPIC lacks an IOMMU	2012-10-02 10:30:38 -07:00
intr_remapping.h
iommu.c
iova.c
Kconfig
Makefile
msm_iommu.c
msm_iommu_dev.c
omap-iommu-debug.c
omap-iommu.c
omap-iovmm.c
tegra-gart.c
tegra-smmu.c	iommu/tegra: smmu: Fix deadly typo	2012-10-28 10:14:15 -07:00