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linux/drivers/iommu
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Lu Baolu 1a3f2fd7fc iommu/vt-d: Fix lockdep splat in iommu_flush_dev_iotlb() 
Lock(&iommu->lock) without disabling irq causes lockdep warnings.

[   12.703950] ========================================================
[   12.703962] WARNING: possible irq lock inversion dependency detected
[   12.703975] 5.9.0-rc6+ #659 Not tainted
[   12.703983] --------------------------------------------------------
[   12.703995] systemd-udevd/284 just changed the state of lock:
[   12.704007] ffffffffbd6ff4d8 (device_domain_lock){..-.}-{2:2}, at:
               iommu_flush_dev_iotlb.part.57+0x2e/0x90
[   12.704031] but this lock took another, SOFTIRQ-unsafe lock in the past:
[   12.704043]  (&iommu->lock){+.+.}-{2:2}
[   12.704045]

               and interrupts could create inverse lock ordering between
               them.

[   12.704073]
               other info that might help us debug this:
[   12.704085]  Possible interrupt unsafe locking scenario:

[   12.704097]        CPU0                    CPU1
[   12.704106]        ----                    ----
[   12.704115]   lock(&iommu->lock);
[   12.704123]                                local_irq_disable();
[   12.704134]                                lock(device_domain_lock);
[   12.704146]                                lock(&iommu->lock);
[   12.704158]   <Interrupt>
[   12.704164]     lock(device_domain_lock);
[   12.704174]
                *** DEADLOCK ***

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200927062428.13713-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-10-01 14:54:17 +02:00
..
amd
iommu/amd: Fix the overwritten field in IVMD header
2020-10-01 14:11:36 +02:00
arm
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
intel
iommu/vt-d: Fix lockdep splat in iommu_flush_dev_iotlb()
2020-10-01 14:54:17 +02:00
dma-iommu.c
dma-pool: fix coherent pool allocations for IOMMU mappings
2020-08-14 16:27:00 +02:00
exynos-iommu.c
iommu/exynos: add missing put_device() call in exynos_iommu_of_xlate()
2020-09-24 10:48:29 +02:00
fsl_pamu_domain.c
iommu/pamu: Use dev_iommu_priv_get/set()
2020-06-30 11:59:48 +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
iommu/pamu: Use kzfree() in fsl_pamu_probe()
2020-06-30 10:47:38 +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
irqdomain/treewide: Keep firmware node unconditionally allocated
2020-07-14 17:44:42 +02:00
io-pgtable-arm-v7s.c
iommu: Add gfp parameter to io_pgtable_ops->map()
2020-07-24 14:29:47 +02:00
io-pgtable-arm.c
Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-29 14:42:00 +02:00
io-pgtable.c
iommu/io-pgtable-arm: Rationalise TCR handling
2020-01-10 15:52:24 +00:00
ioasid.c
iommu/ioasid: Add custom allocators
2019-10-15 13:34:25 +02:00
iommu-debugfs.c
iommu: Fix IOMMU debugfs fallout
2019-02-26 11:15:58 +01:00
iommu-sysfs.c
drivers/iommu: Export core IOMMU API symbols to permit modular drivers
2019-12-23 14:06:05 +01:00
iommu-traces.c
…
iommu.c
Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-29 14:42:00 +02:00
iova.c
iommu/iova: Don't BUG on invalid PFNs
2020-06-30 10:42:27 +02:00
ipmmu-vmsa.c
IOMMU Updates for Linux v5.9
2020-08-11 14:13:24 -07:00
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
IOMMU Updates for Linux v5.9
2020-08-11 14:13:24 -07:00
Makefile
More Arm SMMU updates for 5.9
2020-07-29 14:47:37 +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
iommu: Add gfp parameter to io_pgtable_ops->map()
2020-07-24 14:29:47 +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
iommu/mediatek: Do no use dev->archdata.iommu
2020-06-30 11:59:48 +02:00
mtk_iommu.c
Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-29 14:42:00 +02:00
mtk_iommu.h
Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-29 14:42:00 +02:00
of_iommu.c
of/device: Add input id to of_dma_configure()
2020-07-28 15:51:32 +01:00
omap-iommu-debug.c
iommu/omap: Check for failure of a call to omap_iommu_dump_ctx
2020-07-22 15:02:33 +02:00
omap-iommu.c
Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next
2020-07-29 14:42:00 +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
iommu/omap: Fix -Woverflow warnings when compiling on 64-bit architectures
2020-03-04 16:24:46 +01:00
rockchip-iommu.c
iommu/rockchip: Use dev_iommu_priv_get/set()
2020-06-30 11:59:48 +02:00
s390-iommu.c
s390 updates for the 5.8 merge window
2020-06-08 12:05:31 -07:00
sun50i-iommu.c
iommu/sun50i: Remove unused variable
2020-06-30 12:05:09 +02:00
tegra-gart.c
iommu/tegra: Use dev_iommu_priv_get/set()
2020-06-30 11:59:48 +02:00
tegra-smmu.c
iommu/tegra: Use dev_iommu_priv_get/set()
2020-06-30 11:59:48 +02:00
virtio-iommu.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00