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linux/drivers/iommu
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Jean-Philippe Brucker b2fc9b4b7f iommu/arm-smmu-v3: Disable tagged pointers 
The ARM architecture has a "Top Byte Ignore" (TBI) option that makes the
MMU mask out bits [63:56] of an address, allowing a userspace application
to store data in its pointers. This option is incompatible with PCI ATS.

If TBI is enabled in the SMMU and userspace triggers DMA transactions on
tagged pointers, the endpoint might create ATC entries for addresses that
include a tag. Software would then have to send ATC invalidation packets
for each 255 possible alias of an address, or just wipe the whole address
space. This is not a viable option, so disable TBI.

The impact of this change is unclear, since there are very few users of
tagged pointers, much less SVA. But the requirement introduced by this
patch doesn't seem excessive: a userspace application using both tagged
pointers and SVA should now sanitize addresses (clear the tag) before
using them for device DMA.

Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2019-04-23 12:23:14 +01:00
..
amd_iommu_debugfs.c iommu/amd: Add basic debugfs infrastructure for AMD IOMMU 2018-07-06 14:06:30 +02:00
amd_iommu_init.c iommu/amd: Reserve exclusion range in iova-domain 2019-03-29 17:12:57 +01:00
amd_iommu_proto.h iommu/amd: Add basic debugfs infrastructure for AMD IOMMU 2018-07-06 14:06:30 +02:00
amd_iommu_types.h iommu/amd: Reserve exclusion range in iova-domain 2019-03-29 17:12:57 +01:00
amd_iommu_v2.c iommu/amd: Remove clear_flush_young notifier 2019-01-30 17:30:46 +01:00
amd_iommu.c iommu/amd: Reserve exclusion range in iova-domain 2019-03-29 17:12:57 +01:00
arm-smmu-regs.h iommu/arm-smmu: Split out register defines 2017-08-15 17:34:48 +02:00
arm-smmu-v3.c iommu/arm-smmu-v3: Disable tagged pointers 2019-04-23 12:23:14 +01:00
arm-smmu.c iommu/arm-smmu: Break insecure users by disabling bypass by default 2019-04-05 10:00:41 +01:00
dma-iommu.c iommu/dma: Remove unused variable 2019-01-24 15:14:35 +01:00
dmar.c mm: replace all open encodings for NUMA_NO_NODE 2019-03-05 21:07:14 -08:00
exynos-iommu.c IOMMU: Make dwo drivers use stateless device links 2019-02-01 10:04:08 +01:00
fsl_pamu_domain.c Merge branches 'arm/renesas', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next 2018-10-10 18:09:37 +02:00
fsl_pamu_domain.h iommu/pamu: Fix PAMU boot crash 2017-08-23 16:28:09 +02:00
fsl_pamu.c iommu: fsl_pamu: use for_each_of_cpu_node iterator 2018-09-28 14:25:58 -05:00
fsl_pamu.h iommu/pamu: Fix PAMU boot crash 2017-08-23 16:28:09 +02:00
hyperv-iommu.c iommu/hyper-v: Add Hyper-V stub IOMMU driver 2019-02-28 11:12:16 +01:00
intel_irq_remapping.c iommu/vt-d: Allow interrupts from the entire bus for aliased devices 2019-02-26 10:34:03 +01:00
intel-iommu-debugfs.c iommu/vt-d: Add debugfs support to show context internals 2018-09-25 14:33:44 +02:00
intel-iommu.c iommu/vt-d: Save the right domain ID used by hardware 2019-03-22 12:02:27 +01:00
intel-pasid.c iommu/vt-d: Get domain ID before clear pasid entry 2019-03-01 10:23:36 +01:00
intel-pasid.h iommu/vt-d: Shared virtual address in scalable mode 2018-12-11 10:46:00 +01:00
intel-svm.c iommu/vt-d: Fix NULL pointer reference in intel_svm_bind_mm() 2019-03-01 10:23:36 +01:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: request DMA32 memory, and improve debugging 2019-03-29 10:01:37 -07:00
io-pgtable-arm.c iommu: Allow io-pgtable to be used outside of drivers/iommu/ 2019-02-11 11:26:48 +01:00
io-pgtable.c iommu: Allow io-pgtable to be used outside of drivers/iommu/ 2019-02-11 11:26:48 +01:00
iommu-debugfs.c iommu: Fix IOMMU debugfs fallout 2019-02-26 11:15:58 +01:00
iommu-sysfs.c iommu/sysfs: Rename iommu_release_device() 2018-12-17 12:47:49 +01:00
iommu-traces.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iommu.c iommu: Don't print warning when IOMMU driver only supports unmanaged domains 2019-03-25 14:37:00 +01:00
iova.c iommu/iova: Fix tracking of recently failed iova address 2019-03-22 12:01:58 +01:00
ipmmu-vmsa.c iommu: Allow io-pgtable to be used outside of drivers/iommu/ 2019-02-11 11:26:48 +01:00
irq_remapping.c iommu/hyper-v: Add Hyper-V stub IOMMU driver 2019-02-28 11:12:16 +01:00
irq_remapping.h iommu/hyper-v: Add Hyper-V stub IOMMU driver 2019-02-28 11:12:16 +01:00
Kconfig iommu/arm-smmu: Break insecure users by disabling bypass by default 2019-04-05 10:00:41 +01:00
Makefile iommu/hyper-v: Add Hyper-V stub IOMMU driver 2019-02-28 11:12:16 +01:00
msm_iommu_hw-8xxx.h
msm_iommu.c Merge branches 'iommu/fixes', 'arm/msm', 'arm/tegra', 'arm/mediatek', 'x86/vt-d', 'x86/amd', 'hyper-v' and 'core' into next 2019-03-01 11:24:51 +01:00
msm_iommu.h iommu/msm: Make use of iommu_device_register interface 2017-02-10 13:44:57 +01:00
mtk_iommu_v1.c iommu/mediatek: Fix semicolon code style issue 2019-03-01 10:17:56 +01:00
mtk_iommu.c Merge branches 'iommu/fixes', 'arm/renesas', 'arm/mediatek', 'arm/tegra', 'arm/omap', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next 2018-12-20 10:05:20 +01:00
mtk_iommu.h iommu: Allow io-pgtable to be used outside of drivers/iommu/ 2019-02-11 11:26:48 +01:00
of_iommu.c iommu/of: Fix probe-deferral 2019-01-11 12:28:24 +01:00
omap-iommu-debug.c iommu/omap: Remove DEBUG_SEQ_FOPS_RO() 2018-11-22 17:10:43 +01:00
omap-iommu.c Merge branches 'arm/shmobile', 'arm/renesas', 'arm/msm', 'arm/smmu', 'arm/omap', 'x86/amd', 'x86/vt-d' and 'core' into next 2018-08-08 12:02:27 +02:00
omap-iommu.h iommu/omap: Add support to program multiple iommus 2017-09-19 11:32:05 +02:00
omap-iopgtable.h
qcom_iommu.c iommu: Allow io-pgtable to be used outside of drivers/iommu/ 2019-02-11 11:26:48 +01:00
rockchip-iommu.c IOMMU: Make dwo drivers use stateless device links 2019-02-01 10:04:08 +01:00
s390-iommu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tegra-gart.c iommu/tegra: gart: Perform code refactoring 2019-01-16 13:54:16 +01:00
tegra-smmu.c memory: tegra: Do not try to probe SMMU on Tegra20 2019-01-16 13:54:13 +01:00