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Qian Cai 4f60640723 iommu/vt-d: Fix RCU-list bugs in intel_iommu_init() 
commit 2d48ea0efb8887ebba3e3720bb5b738aced4e574 upstream.

There are several places traverse RCU-list without holding any lock in
intel_iommu_init(). Fix them by acquiring dmar_global_lock.

 WARNING: suspicious RCU usage
 -----------------------------
 drivers/iommu/intel-iommu.c:5216 RCU-list traversed in non-reader section!!

 other info that might help us debug this:

 rcu_scheduler_active = 2, debug_locks = 1
 no locks held by swapper/0/1.

 Call Trace:
  dump_stack+0xa0/0xea
  lockdep_rcu_suspicious+0x102/0x10b
  intel_iommu_init+0x947/0xb13
  pci_iommu_init+0x26/0x62
  do_one_initcall+0xfe/0x500
  kernel_init_freeable+0x45a/0x4f8
  kernel_init+0x11/0x139
  ret_from_fork+0x3a/0x50
 DMAR: Intel(R) Virtualization Technology for Directed I/O

Fixes: d8190dc63886 ("iommu/vt-d: Enable DMA remapping after rmrr mapped")
Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-18 07:17:56 +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: Disable IOMMU on Stoney Ridge systems
2020-03-12 13:00:14 +01:00
amd_iommu_proto.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
amd_iommu_quirks.c
iommu/amd: Apply the same IVRS IOAPIC workaround to Acer Aspire A315-41
2019-10-30 10:24:03 +01:00
amd_iommu_types.h
iommu/amd: Only support x2APIC with IVHD type 11h/40h
2020-02-24 08:36:40 +01:00
amd_iommu_v2.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
amd_iommu.c
PCI: Add nr_devfns parameter to pci_add_dma_alias()
2020-02-24 08:36:37 +01:00
amd_iommu.h
iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems
2019-08-23 10:26:48 +02:00
arm-smmu-impl.c
iommu/arm-smmu: Make private implementation details static
2019-08-20 10:58:03 +01:00
arm-smmu-v3.c
iommu/arm-smmu-v3: Use WRITE_ONCE() when changing validity of an STE
2020-02-24 08:36:49 +01:00
arm-smmu.c
iommu/arm-smmu: Free context bitmap in the err path of arm_smmu_init_domain_context
2019-10-01 12:13:16 +01:00
arm-smmu.h
Merge branches 'for-joerg/arm-smmu/smmu-v2' and 'for-joerg/arm-smmu/smmu-v3' into for-joerg/arm-smmu/updates
2019-08-23 15:05:45 +01:00
dma-iommu.c
iommu/dma: Fix MSI reservation allocation
2020-03-18 07:17:54 +01:00
dmar.c
iommu/vt-d: dmar: replace WARN_TAINT with pr_warn + add_taint
2020-03-18 07:17:54 +01:00
exynos-iommu.c
Merge branches 'arm/omap', 'arm/exynos', 'arm/smmu', 'arm/mediatek', 'arm/qcom', 'arm/renesas', 'x86/amd', 'x86/vt-d' and 'core' into next
2019-09-11 12:39:19 +02:00
fsl_pamu_domain.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
fsl_pamu_domain.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
fsl_pamu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +02:00
fsl_pamu.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266
2019-06-05 17:30:28 +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: Fix wrong analysis whether devices share the same bus
2019-08-30 15:47:37 +02:00
intel-iommu-debugfs.c
iommu/vt-d: Correctly check format of page table in debugfs
2019-08-09 17:29:25 +02:00
intel-iommu.c
iommu/vt-d: Fix RCU-list bugs in intel_iommu_init()
2020-03-18 07:17:56 +01:00
intel-pasid.c
iommu/vt-d: Match CPU and IOMMU paging mode
2020-02-24 08:36:43 +01:00
intel-pasid.h
iommu/vt-d: Introduce macros useful for dumping DMAR table
2019-05-27 16:16:09 +02:00
intel-svm.c
iommu/vt-d: Avoid sending invalid page response
2020-02-24 08:36:43 +01:00
intel-trace.c
iommu/vt-d: Add trace events for device dma map/unmap
2019-09-11 12:34:30 +02:00
io-pgtable-arm-v7s.c
Merge branch 'arm/smmu' into arm/mediatek
2019-08-30 16:12:10 +02:00
io-pgtable-arm.c
iommu/io-pgtable-arm: Support all Mali configurations
2019-10-01 12:16:47 +01:00
io-pgtable.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
2019-06-19 17:09:07 +02:00
iommu-debugfs.c
iommu: Fix IOMMU debugfs fallout
2019-02-26 11:15:58 +01:00
iommu-sysfs.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
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: Remove device link to group on failure
2020-01-17 19:48:20 +01:00
iova.c
iommu/iova: Silence warnings under memory pressure
2020-02-24 08:36:40 +01:00
ipmmu-vmsa.c
iommu/ipmmu-vmsa: Remove dev_err() on platform_get_irq() failure
2019-10-30 10:16:37 +01:00
irq_remapping.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
irq_remapping.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333
2019-06-05 17:37:06 +02:00
Kconfig
ia64 for v5.4 - big change here is removal of support for SGI Altix
2019-09-16 15:32:01 -07:00
Makefile
Merge branches 'arm/omap', 'arm/exynos', 'arm/smmu', 'arm/mediatek', 'arm/qcom', 'arm/renesas', 'x86/amd', 'x86/vt-d' and 'core' into next
2019-09-11 12:39:19 +02:00
msm_iommu_hw-8xxx.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267
2019-06-05 17:30:29 +02:00
msm_iommu.c
Merge branch 'for-joerg/batched-unmap' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into core
2019-08-20 11:09:43 +02:00
msm_iommu.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267
2019-06-05 17:30:29 +02:00
mtk_iommu_v1.c
Devicetree updates for v5.4:
2019-09-19 13:48:37 -07:00
mtk_iommu.c
iommu/mediatek: Add a new tlb_lock for tlb_flush
2020-01-17 19:48:59 +01:00
mtk_iommu.h
iommu/mediatek: Add a new tlb_lock for tlb_flush
2020-01-17 19:48:59 +01:00
of_iommu.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335
2019-06-05 17:37:06 +02:00
omap-iommu-debug.c
Merge branches 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/omap', 'generic-dma-ops' and 'core' into next
2019-07-04 17:26:48 +02:00
omap-iommu.c
Merge branches 'arm/omap', 'arm/exynos', 'arm/smmu', 'arm/mediatek', 'arm/qcom', 'arm/renesas', 'x86/amd', 'x86/vt-d' and 'core' into next
2019-09-11 12:39:19 +02:00
omap-iommu.h
iommu/omap: add support for late attachment of iommu devices
2019-08-09 17:37:10 +02:00
omap-iopgtable.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
qcom_iommu.c
iommu/qcom: Fix bogus detach logic
2020-02-28 17:22:12 +01:00
rockchip-iommu.c
iommu: rockchip: Free domain on .domain_free
2020-01-04 19:16:38 +01:00
s390-iommu.c
iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()
2019-07-29 17:22:52 +01:00
tegra-gart.c
iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()
2019-07-29 17:22:52 +01:00
tegra-smmu.c
iommu/tegra-smmu: Fix page tables in > 4 GiB memory
2020-01-04 19:16:39 +01:00
virtio-iommu.c
Merge branch 'for-joerg/arm-smmu/updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu
2019-08-23 17:41:59 +02:00