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aea2037e0d
linux-next/drivers/iommu
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Will Deacon aea2037e0d iommu/arm-smmu: Fix CMDQ error handling 
In the unlikely event of a global command queue error, the ARM SMMUv3
driver attempts to convert the problematic command into a CMD_SYNC and
resume the command queue. Unfortunately, this code is pretty badly
broken:

  1. It uses the index into the error string table as the CMDQ index,
     so we probably read the wrong entry out of the queue

  2. The arguments to queue_write are the wrong way round, so we end up
     writing from the queue onto the stack.

These happily cancel out, so the kernel is likely to stay alive, but
the command queue will probably fault again when we resume.

This patch fixes the error handling code to use the correct queue index
and write back the CMD_SYNC to the faulting entry.

Cc: <stable@vger.kernel.org>
Fixes: 48ec83bcbc ("iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices")
Reported-by: Diwakar Subraveti <Diwakar.Subraveti@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-08-19 09:43:25 +01:00
..
amd_iommu_init.c iommu/amd: Fix unity mapping initialization race 2016-07-06 18:04:55 +02:00
amd_iommu_proto.h IOMMU Updates for Linux v4.2 2015-06-23 18:27:19 -07:00
amd_iommu_types.h iommu/amd: Use container_of to get dma_ops_domain 2016-07-14 10:21:57 +02:00
amd_iommu_v2.c IOMMU Updates for Linux v4.8 2016-08-01 07:25:10 -04:00
amd_iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
arm-smmu-v3.c iommu/arm-smmu: Fix CMDQ error handling 2016-08-19 09:43:25 +01:00
arm-smmu.c iommu/arm-smmu: Use devm_request_irq and devm_free_irq 2016-07-06 18:31:51 +01:00
dma-iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
dmar.c IOMMU Updates for Linux v4.8 2016-08-01 07:25:10 -04:00
exynos-iommu.c iommu/exynos: update to use iommu big-endian 2016-06-21 11:59:03 +02:00
fsl_pamu_domain.c iommu/fsl: Convert to device_group call-back 2015-10-22 00:00:49 +02:00
fsl_pamu_domain.h iommu/fsl: Make use of domain_alloc and domain_free 2015-03-31 15:32:14 +02:00
fsl_pamu.c powerpc/fsl: Move fsl_guts.h out of arch/powerpc 2015-10-21 18:05:50 -05:00
fsl_pamu.h iommu/fsl: Various cleanups 2015-02-03 18:47:18 +01:00
intel_irq_remapping.c SVM fixes for Linux 4.5 2016-02-16 08:04:06 -08:00
intel-iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
intel-svm.c mm: do not pass mm_struct into handle_mm_fault 2016-07-26 16:19:19 -07:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: Fix attributes when splitting blocks 2016-08-19 09:40:16 +01:00
io-pgtable-arm.c iommu/io-pgtable-arm: Fix iova_to_phys for block entries 2016-07-01 14:04:37 +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: Add MTK 4GB mode in Short-descriptor 2016-04-05 15:39:37 +02:00
iommu-sysfs.c iommu: Fix compile error in iommu-sysfs.c 2014-07-07 12:01:21 +02:00
iommu-traces.c iommu: Add iommu_error class event to iommu trace 2013-09-25 11:07:04 +02:00
iommu.c Merge branches 'x86/amd', 'x86/vt-d', 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/rockchip', 'arm/smmu' and 'core' into next 2016-07-26 16:02:37 +02:00
iova.c iommu/iova: Disable preemption around use of this_cpu_ptr() 2016-06-27 13:07:45 +02:00
ipmmu-vmsa.c Merge branches 's390', 'arm/renesas', 'arm/msm', 'arm/shmobile', 'arm/smmu', 'x86/amd' and 'x86/vt-d' into next 2016-01-19 15:30:43 +01:00
irq_remapping.c x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage 2016-04-13 11:37:41 +02:00
irq_remapping.h iommu, x86: Setup Posted-Interrupts capability for Intel iommu 2015-06-12 11:33:52 +02:00
Kconfig Merge branches 'x86/amd', 'x86/vt-d', 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/rockchip', 'arm/smmu' and 'core' into next 2016-07-26 16:02:37 +02:00
Makefile Merge branches 'x86/amd', 'x86/vt-d', 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/rockchip', 'arm/smmu' and 'core' into next 2016-07-26 16:02:37 +02:00
msm_iommu_hw-8xxx.h iommu/msm: Move mach includes to iommu directory 2013-08-06 11:18:03 -07:00
msm_iommu.c iommu/msm: use generic ARMV7S short descriptor pagetable ops 2016-06-21 13:57:13 +02:00
msm_iommu.h iommu/msm: Add DT adaptation 2016-06-21 13:56:00 +02:00
mtk_iommu_v1.c iommu/mediatek: Make mtk_iommu_pm_ops static 2016-06-21 11:54:06 +02:00
mtk_iommu.c iommu/mediatek: move the common struct into header file 2016-06-21 11:36:19 +02:00
mtk_iommu.h iommu/mediatek: move the common struct into header file 2016-06-21 11:36:19 +02:00
of_iommu.c of: iommu: make of_iommu_init() postcore_initcall_sync 2016-06-23 14:57:40 -05:00
omap-iommu-debug.c iommu/omap: Align code with open parenthesis 2016-04-05 17:53:20 +02:00
omap-iommu.c iommu/omap: Use WARN_ON for page table alignment check 2016-04-05 17:53:20 +02:00
omap-iommu.h iommu/omap: Add support for configuring dsp iommus on DRA7xx 2015-10-14 14:35:47 +02:00
omap-iopgtable.h iommu/omap: Use BIT(x) macros in omap-iopgtable.h 2015-08-03 16:04:42 +02:00
rockchip-iommu.c iommu/rockchip: Prepare to support generic DMA mapping 2016-06-27 14:50:08 +02:00
s390-iommu.c iommu/s390: Fix sparse warnings 2015-11-26 14:41:01 +01:00
tegra-gart.c Merge branches 'iommu/fixes', 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/tegra' and 'core' into next 2015-04-02 13:33:19 +02:00
tegra-smmu.c iommu/tegra-smmu: Parameterize number of TLB lines 2015-08-13 17:05:28 +02:00