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cef74409ea
linux/drivers/iommu
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Gil Kupfer cef74409ea PCI: Add "pci=noats" boot parameter 
Adds a "pci=noats" boot parameter.  When supplied, all ATS related
functions fail immediately and the IOMMU is configured to not use
device-IOTLB.

Any function that checks for ATS capabilities directly against the devices
should also check this flag.  Currently, such functions exist only in IOMMU
drivers, and they are covered by this patch.

The motivation behind this patch is the existence of malicious devices.
Lots of research has been done about how to use the IOMMU as protection
from such devices.  When ATS is supported, any I/O device can access any
physical address by faking device-IOTLB entries.  Adding the ability to
ignore these entries lets sysadmins enhance system security.

Signed-off-by: Gil Kupfer <gilkup@cs.technion.ac.il>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
2018-05-10 17:56:02 -05:00
..
amd_iommu_init.c iommu/amd: Use raw locks on atomic context paths 2018-02-13 14:18:06 +01:00
amd_iommu_proto.h IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
amd_iommu_types.h iommu/amd: Turn dev_data_list into a lock less list 2018-03-29 10:38:14 +02:00
amd_iommu_v2.c pci-v4.16-changes 2018-02-06 09:59:40 -08:00
amd_iommu.c PCI: Add "pci=noats" boot parameter 2018-05-10 17:56:02 -05:00
arm-smmu-regs.h
arm-smmu-v3.c iommu/arm-smmu-v3: Support 52-bit virtual address 2018-03-27 14:12:06 +01:00
arm-smmu.c iommu: Clean up of_iommu_init_fn 2018-01-17 15:25:50 +01:00
dma-iommu.c iommu/dma: Add HW MSI(GICv3 ITS) address regions reservation 2018-02-14 15:15:41 +01:00
dmar.c iommu/vt-d: Add __init for dmar_register_bus_notifier() 2018-02-13 17:40:53 +01:00
exynos-iommu.c IOMMU Updates for Linux v4.17 2018-04-11 18:50:41 -07:00
fsl_pamu_domain.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
fsl_pamu_domain.h
fsl_pamu.c Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next 2017-09-01 11:31:42 +02:00
fsl_pamu.h
intel_irq_remapping.c genirq/irqdomain: Rename early argument of irq_domain_activate_irq() 2017-12-29 21:13:04 +01:00
intel-iommu.c PCI: Add "pci=noats" boot parameter 2018-05-10 17:56:02 -05:00
intel-svm.c Merge branches 'x86/amd', 'x86/vt-d', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/exynos', 'arm/renesas', 'arm/smmu' and 'core' into next 2018-03-29 15:24:40 +02:00
io-pgtable-arm-v7s.c iommu/io-pgtable: Use size_t return type for all foo_unmap 2018-02-13 19:31:32 +01:00
io-pgtable-arm.c Merge branches 'x86/amd', 'x86/vt-d', 'arm/rockchip', 'arm/omap', 'arm/mediatek', 'arm/exynos', 'arm/renesas', 'arm/smmu' and 'core' into next 2018-03-29 15:24:40 +02:00
io-pgtable.c
io-pgtable.h iommu/io-pgtable: Use size_t return type for all foo_unmap 2018-02-13 19:31:32 +01:00
iommu-sysfs.c
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: Do not return error code for APIs with size_t return type 2018-02-13 19:31:20 +01:00
iova.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
ipmmu-vmsa.c iommu: Clean up of_iommu_init_fn 2018-01-17 15:25:50 +01:00
irq_remapping.c x86/apic: Rename variables and functions related to x86_io_apic_ops 2018-02-17 11:47:45 +01:00
irq_remapping.h
Kconfig iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent() 2018-03-20 10:01:58 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu: Clean up of_iommu_init_fn 2018-01-17 15:25:50 +01:00
msm_iommu.h
mtk_iommu_v1.c IOMMU Updates for Linux v4.17 2018-04-11 18:50:41 -07:00
mtk_iommu.c iommu/mediatek: Fix protect memory setting 2018-03-21 06:13:57 -05:00
mtk_iommu.h iommu/mediatek: Fix protect memory setting 2018-03-21 06:13:57 -05:00
of_iommu.c iommu: Clean up of_iommu_init_fn 2018-01-17 15:25:50 +01:00
omap-iommu-debug.c iommu/omap: Fix debugfs_create_*() usage 2018-01-17 14:23:33 +01:00
omap-iommu.c iommu/omap: Increase group ref in .device_group() 2018-03-15 15:54:52 +01:00
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: Clean up of_iommu_init_fn 2018-01-17 15:25:50 +01:00
rockchip-iommu.c iommu/rockchip: Support sharing IOMMU between masters 2018-03-29 12:22:29 +02:00
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
tegra-smmu.c iommu/tegra-smmu: Fix return value check in tegra_smmu_group_get() 2017-12-20 18:32:08 +01:00