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linux/drivers/iommu
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David Woodhouse 359effb003 iommu/vt-d: Fix passthrough mode with translation-disabled devices 
commit 4ed6a540fa upstream.

When we use 'intel_iommu=igfx_off' to disable translation for the
graphics, and when we discover that the BIOS has misconfigured the DMAR
setup for I/OAT, we use a special DUMMY_DEVICE_DOMAIN_INFO value in
dev->archdata.iommu to indicate that translation is disabled.

With passthrough mode, we were attempting to dereference that as a
normal pointer to a struct device_domain_info when setting up an
identity mapping for the affected device.

This fixes the problem by making device_to_iommu() explicitly check for
the special value and indicate that no IOMMU was found to handle the
devices in question.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
History 2015-06-30 17:15:19 +01:00
..
amd_iommu.c iommu/amd: Fix cleanup_domain for mass device removal 2014-09-17 09:21:51 -07:00
amd_iommu_init.c iommu/amd: fix enabling exclusion range for an exact device 2014-05-13 12:33:12 +02:00
amd_iommu_proto.h perf/x86/amd: Add IOMMU Performance Counter resource management 2013-06-19 13:04:52 +02:00
amd_iommu_types.h IOMMU Upates for Linux v3.15 2014-04-05 18:46:26 -07:00
amd_iommu_v2.c iommu/amd: Fix small race between invalidate_range_end/start 2014-06-20 16:14:22 +02:00
arm-smmu.c iommu/arm-smmu: fix programming of SMMU_CBn_TCR for stage 1 2014-10-05 13:41:00 -07:00
dmar.c iommu/vt-d: Check return value of acpi_bus_get_device() 2014-10-05 13:40:59 -07:00
exynos-iommu.c Driver core / kernfs pull request for 3.16-rc1 2014-06-03 08:07:41 -07:00
fsl_pamu.c iommu/fsl: Fix PAMU window size check. 2014-07-07 10:30:01 +02:00
fsl_pamu.h iommu/fsl: Freescale PAMU driver and iommu implementation. 2013-08-14 11:38:34 +02:00
fsl_pamu_domain.c iommu/fsl: Fix warning resulting from adding PCI device twice 2014-10-05 13:41:00 -07:00
fsl_pamu_domain.h iommu/fsl: Freescale PAMU driver and iommu implementation. 2013-08-14 11:38:34 +02:00
intel-iommu.c iommu/vt-d: Fix passthrough mode with translation-disabled devices 2015-06-30 17:15:19 +01:00
intel_irq_remapping.c iommu/vt-d: Introduce a rwsem to protect global data structures 2014-03-04 17:51:05 +01:00
iommu-traces.c iommu: Add iommu_error class event to iommu trace 2013-09-25 11:07:04 +02:00
iommu.c Merge branches 'iommu/fixes', 'tracing', 'core', 'arm/tegra', 'x86/vt-d', 'arm/smmu' and 'arm/shmobile' into next 2013-11-01 14:44:25 +01:00
iova.c iommu/vt-d: Update IOMMU state when memory hotplug happens 2014-03-04 17:51:06 +01:00
ipmmu-vmsa.c arm/ipmmu-vmsa: Fix compile error 2014-05-26 13:18:18 +02:00
irq_remapping.c x86: irq_remapping: Use irq_alloc/free_hwirq() 2014-05-16 14:05:18 +02:00
irq_remapping.h iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets 2013-04-18 17:00:47 +02:00
Kconfig Merge branches 'iommu/fixes', 'arm/omap', 'arm/smmu', 'arm/shmobile', 'x86/amd', 'arm/exynos', 'arm/renesas', 'ppc/pamu' and 'arm/msm' into next 2014-05-30 20:22:10 +02:00
Makefile iommu: Add driver for Renesas VMSA-compatible IPMMU 2014-05-26 11:18:21 +02:00
msm_iommu.c iommu/msm: Move mach includes to iommu directory 2013-08-06 11:18:03 -07:00
msm_iommu.h iommu/msm: Move mach includes to iommu directory 2013-08-06 11:18:03 -07:00
msm_iommu_dev.c iommu/msm: Use devm_ioremap_resource to simplify code 2014-05-30 20:20:12 +02:00
msm_iommu_hw-8xxx.h iommu/msm: Move mach includes to iommu directory 2013-08-06 11:18:03 -07:00
of_iommu.c iommu: add missing include 2014-01-07 15:16:27 +01:00
omap-iommu-debug.c drivers/iommu/omap-iommu-debug.c: fix decimal permissions 2014-02-25 15:25:42 -08:00
omap-iommu.c iommu/omap: Fix map protection value handling 2014-04-16 16:30:18 +02:00
omap-iommu.h iommu/omap: Enable bus-error back on supported iommus 2014-03-04 17:02:08 +01:00
omap-iommu2.c iommu/omap: Enable bus-error back on supported iommus 2014-03-04 17:02:08 +01:00
omap-iopgtable.h iommu/omap: Move to_iommu definition from omap-iopgtable.h 2014-04-16 16:30:15 +02:00
omap-iovmm.c iommu/omap: fix checkpatch warnings in omap iommu code 2013-06-20 16:53:26 +02:00
pci.h iommu: Move swap_pci_ref function to drivers/iommu/pci.h. 2013-04-23 14:55:00 +02:00
shmobile-iommu.c arm: dma-mapping: remove order parameter from arm_iommu_create_mapping() 2014-02-28 11:55:18 +01:00
shmobile-ipmmu.c iommu/shmobile: Use devm_ioremap_resource() 2014-04-17 12:16:12 +02:00
shmobile-ipmmu.h iommu/shmobile: Turn the flush_lock mutex into a spinlock 2014-01-07 15:35:25 +01:00
tegra-gart.c iommu/tegra-gart: Staticize tegra_gart_pm_ops 2013-11-01 14:23:20 +01:00
tegra-smmu.c iommu/tegra-smmu: Staticize tegra_smmu_pm_ops 2013-11-01 14:23:33 +01:00