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linux/drivers/iommu
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Jason Gunthorpe 3723a05fdb iommu: Do not return 0 from map_pages if it doesn't do anything 
[ Upstream commit 6093cd582f ]

These three implementations of map_pages() all succeed if a mapping is
requested with no read or write. Since they return back to __iommu_map()
leaving the mapped output as 0 it triggers an infinite loop. Therefore
nothing is using no-access protection bits.

Further, VFIO and iommufd rely on iommu_iova_to_phys() to get back PFNs
stored by map, if iommu_map() succeeds but iommu_iova_to_phys() fails that
will create serious bugs.

Thus remove this never used "nothing to do" concept and just fail map
immediately.

Fixes: e5fc9753b1 ("iommu/io-pgtable: Add ARMv7 short descriptor support")
Fixes: e1d3c0fd70 ("iommu: add ARM LPAE page table allocator")
Fixes: 745ef1092b ("iommu/io-pgtable: Move Apple DART support to its own file")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/2-v1-1211e1294c27+4b1-iommu_no_prot_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-09-04 13:25:01 +02:00
..
amd iommu/amd: Fix sysfs leak in iommu init 2024-06-21 14:35:49 +02:00
arm iommu/arm-smmu-v3: Free MSIs in case of ENOMEM 2024-06-27 13:46:17 +02:00
intel iommu/vt-d: Fix identity map bounds in si_domain_init() 2024-08-03 08:49:23 +02:00
apple-dart.c iommu/dart: Fix apple_dart_device_group for PCI groups 2023-03-10 09:33:36 +01:00
dma-iommu.c iommu/dma: Force swiotlb_max_mapping_size on an untrusted device 2024-04-03 15:19:44 +02:00
dma-iommu.h iommu/dma: Make header private 2022-09-09 09:26:22 +02:00
exynos-iommu.c iommu/exynos: Clean up bus_set_iommu() 2022-09-07 14:26:14 +02:00
fsl_pamu.c iommu/fsl_pamu: Fix resource leak in fsl_pamu_probe() 2022-12-31 13:32:50 +01:00
fsl_pamu.h iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace 2021-04-07 10:56:52 +02:00
fsl_pamu_domain.c iommu: Clean up bus_set_iommu() 2022-09-07 14:26:17 +02:00
fsl_pamu_domain.h iommu/fsl_pamu: remove the snoop_id field 2021-04-07 10:56:52 +02:00
hyperv-iommu.c iommu/hyper-v: Use helper instead of directly accessing affinity 2022-08-04 10:02:09 +01:00
io-pgfault.c mm: always expand the stack with the mmap write lock held 2023-07-01 13:16:25 +02:00
io-pgtable-arm-v7s.c iommu: Do not return 0 from map_pages if it doesn't do anything 2024-09-04 13:25:01 +02:00
io-pgtable-arm.c iommu: Do not return 0 from map_pages if it doesn't do anything 2024-09-04 13:25:01 +02:00
io-pgtable-arm.h iommu/io-pgtable-arm: Move some definitions to a header 2020-09-28 23:48:06 +01:00
io-pgtable-dart.c iommu: Do not return 0 from map_pages if it doesn't do anything 2024-09-04 13:25:01 +02:00
io-pgtable.c Merge branches 'apple/dart', 'arm/mediatek', 'arm/omap', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd' and 'core' into next 2022-09-26 15:52:31 +02:00
ioasid.c iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-debugfs.c iommu: Fix IOMMU debugfs fallout 2019-02-26 11:15:58 +01:00
iommu-sva-lib.c iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-sva-lib.h iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +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 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: Avoid races around default domain allocations 2024-04-03 15:19:43 +02:00
iova.c iommu/iova: Fix alloc iova overflows issue 2023-01-18 11:58:20 +01:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Clean up bus_set_iommu() 2022-09-07 14:26:14 +02:00
irq_remapping.c iommu: Fix compilation without CONFIG_IOMMU_INTEL 2024-03-26 18:20:41 -04:00
irq_remapping.h x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
Kconfig iommu: Fix compilation without CONFIG_IOMMU_INTEL 2024-03-26 18:20:41 -04:00
Makefile iommu/io-pgtable: Move Apple DART support to its own file 2022-09-26 13:48:40 +02:00
msm_iommu.c iommu: Clean up bus_set_iommu() 2022-09-07 14:26:17 +02:00
msm_iommu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
msm_iommu_hw-8xxx.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mtk_iommu.c iommu: mtk: fix module autoloading 2024-05-17 11:56:08 +02:00
mtk_iommu_v1.c iommu: mtk: fix module autoloading 2024-05-17 11:56:08 +02:00
of_iommu.c iommu: Avoid more races around device probe 2023-12-13 18:39:17 +01:00
omap-iommu-debug.c iommu/omap: Fix buffer overflow in debugfs 2022-09-07 10:42:28 +02:00
omap-iommu.c iommu/omap: Clean up bus_set_iommu() 2022-09-07 14:26:15 +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: Fix directory table address encoding 2023-09-13 09:42:50 +02:00
s390-iommu.c iommu/s390: Fix duplicate domain attachments 2022-12-31 13:32:47 +01:00
sprd-iommu.c iommu: sprd: Avoid NULL deref in sprd_iommu_hw_en 2024-08-03 08:49:53 +02:00
sun50i-iommu.c iommu/sun50i: Remove IOMMU_DOMAIN_IDENTITY 2022-12-31 13:32:51 +01:00
tegra-gart.c iommu: Make .release_device optional 2022-07-06 12:55:53 +02:00
tegra-smmu.c iommu/tegra-smmu: Clean up bus_set_iommu() 2022-09-07 14:26:16 +02:00
virtio-iommu.c iommu/virtio: Return size mapped for a detached domain 2023-07-19 16:21:20 +02:00