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9825bd94e3
linux/drivers/iommu
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Suravee Suthikulpanit 9825bd94e3 iommu/amd: Fix IOMMU page flush when detach device from a domain 
When a VM is terminated, the VFIO driver detaches all pass-through
devices from VFIO domain by clearing domain id and page table root
pointer from each device table entry (DTE), and then invalidates
the DTE. Then, the VFIO driver unmap pages and invalidate IOMMU pages.

Currently, the IOMMU driver keeps track of which IOMMU and how many
devices are attached to the domain. When invalidate IOMMU pages,
the driver checks if the IOMMU is still attached to the domain before
issuing the invalidate page command.

However, since VFIO has already detached all devices from the domain,
the subsequent INVALIDATE_IOMMU_PAGES commands are being skipped as
there is no IOMMU attached to the domain. This results in data
corruption and could cause the PCI device to end up in indeterministic
state.

Fix this by invalidate IOMMU pages when detach a device, and
before decrementing the per-domain device reference counts.

Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Suggested-by: Joerg Roedel <joro@8bytes.org>
Co-developed-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Fixes: 6de8ad9b9e ('x86/amd-iommu: Make iommu_flush_pages aware of multiple IOMMUs')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-01-24 15:24:49 +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 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
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: Ignore page-mode 7 in free_sub_pt() 2018-11-15 16:40:53 +01:00
amd_iommu_v2.c iommu/amd: Use pr_fmt() 2018-11-28 09:47:41 +01:00
amd_iommu.c iommu/amd: Fix IOMMU page flush when detach device from a domain 2019-01-24 15:24:49 +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 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
arm-smmu.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
dma-iommu.c IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
dmar.c IOMMU Updates for Linux v4.21 2019-01-01 15:55:29 -08:00
exynos-iommu.c IOMMU Update for Linux v4.19 2018-08-24 13:10:38 -07:00
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
intel_irq_remapping.c iommu/vt-d: Add 256-bit invalidation descriptor support 2018-12-11 10:45:58 +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: Fix memory leak in intel_iommu_put_resv_regions() 2019-01-22 14:01:38 +01:00
intel-pasid.c iommu/vt-d: Shared virtual address in scalable mode 2018-12-11 10:46:00 +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 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
io-pgtable-arm-v7s.c Revert "iommu/io-pgtable-arm: Check for v7s-incapable systems" 2018-12-17 10:19:10 +01:00
io-pgtable-arm.c iommu/io-pgtable-arm: Add support for non-strict mode 2018-10-01 13:01:33 +01:00
io-pgtable.c iommu/io-pgtable: Fix a brace coding style issue. 2016-04-05 15:34:29 +02:00
io-pgtable.h iommu/io-pgtable-arm: Add support for non-strict mode 2018-10-01 13:01:33 +01:00
iommu-debugfs.c iommu: Enable debugfs exposure of IOMMU driver internals 2018-07-06 14:06:30 +02:00
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: Check for iommu_ops == NULL in iommu_probe_device() 2018-12-20 10:02:20 +01:00
iova.c iommu/iova: Optimise attempts to allocate iova from 32bit address range 2018-09-25 10:18:27 +02:00
ipmmu-vmsa.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
irq_remapping.c irq_remapping: Remove unused header files 2018-12-03 14:26:12 +01:00
irq_remapping.h irq_remapping: Use apic_ack_irq() 2018-06-06 15:18:20 +02:00
Kconfig IOMMU Updates for Linux v4.20 2018-10-26 10:50:10 -07:00
Makefile iommu/vt-d: Enable base Intel IOMMU debugfs support 2018-09-25 14:33:43 +02:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu/msm: Make it explicitly non-modular 2018-12-03 14:32:03 +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: Use correct fwspec in mtk_iommu_add_device() 2019-01-23 13:51:05 +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/mediatek: Fix protect memory setting 2018-03-21 06:13:57 -05:00
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 iommu/omap: Use BIT(x) macros in omap-iopgtable.h 2015-08-03 16:04:42 +02:00
qcom_iommu.c iommu/qcom: Use helper functions to access dev->iommu_fwspec 2018-12-17 10:38:32 +01:00
rockchip-iommu.c iommu/rockchip: Make it explicitly non-modular 2018-12-03 14:32:03 +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: Make it explicitly non-modular 2018-12-03 14:32:03 +01:00
tegra-smmu.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