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linux/drivers/iommu
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Ashish Mhetre 5e23e28391 iommu: Don't reserve 0-length IOVA region 
[ Upstream commit bb57f67059 ]

When the bootloader/firmware doesn't setup the framebuffers, their
address and size are 0 in "iommu-addresses" property. If IOVA region is
reserved with 0 length, then it ends up corrupting the IOVA rbtree with
an entry which has pfn_hi < pfn_lo.
If we intend to use display driver in kernel without framebuffer then
it's causing the display IOMMU mappings to fail as entire valid IOVA
space is reserved when address and length are passed as 0.
An ideal solution would be firmware removing the "iommu-addresses"
property and corresponding "memory-region" if display is not present.
But the kernel should be able to handle this by checking for size of
IOVA region and skipping the IOVA reservation if size is 0. Also, add
a warning if firmware is requesting 0-length IOVA region reservation.

Fixes: a5bf3cfce8 ("iommu: Implement of_iommu_get_resv_regions()")
Signed-off-by: Ashish Mhetre <amhetre@nvidia.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20231205065656.9544-1-amhetre@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-01-25 15:45:23 -08:00
..
amd IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
arm iommu/arm-smmu-qcom: Add missing GMU entry to match table 2024-01-25 15:45:15 -08:00
intel iommu/vt-d: Set variable intel_dirty_ops to static 2023-11-27 11:07:54 +01:00
iommufd iommufd: Do not UAF during iommufd_put_object() 2023-11-29 20:30:03 -04:00
apple-dart.c Merge branches 'iommu/fixes', 'arm/tegra', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd', 'core' and 's390' into next 2023-10-27 09:13:40 +02:00
dma-iommu.c iommu/dma: Trace bounce buffer usage when mapping buffers 2024-01-25 15:45:15 -08:00
dma-iommu.h iommu: Optimise PCI SAC address trick 2023-07-14 16:14:17 +02:00
exynos-iommu.c iommu/exynos: Update to {map,unmap}_pages 2023-09-25 12:04:36 +02:00
fsl_pamu.c iommu/fsl: fix all kernel-doc warnings in fsl_pamu.c 2023-03-22 14:50:15 +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/fsl_pamu: Implement a PLATFORM domain 2023-09-25 11:40:54 +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 x86/vector: Rename send_cleanup_vector() to vector_schedule_cleanup() 2023-08-06 14:15:09 +02:00
io-pgfault.c iommu: Rename iommu-sva-lib.{c,h} 2022-11-03 15:47:54 +01:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: Remove map/unmap 2022-11-19 10:44:15 +01:00
io-pgtable-arm.c iommu/io-pgtable-arm: Remove map/unmap 2022-11-19 10:44:15 +01:00
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/io-pgtable-dart: Add DART PTE support for t6000 2022-09-26 13:49:40 +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
iommu-debugfs.c iommu: Fix IOMMU debugfs fallout 2019-02-26 11:15:58 +01:00
iommu-priv.h iommu: Move dev_iommu_ops() to private header 2023-08-18 12:52:15 -03:00
iommu-sva.c iommu: Move global PASID allocation from SVA to core 2023-08-09 17:44:36 +02:00
iommu-sva.h iommu: Remove ioasid infrastructure 2023-03-31 10:03:31 +02:00
iommu-sysfs.c iommu: Do not export iommu_device_link/unlink() 2023-07-14 16:14:15 +02:00
iommu-traces.c iommu: Remove detach_dev callback 2023-01-13 16:39:18 +01:00
iommu.c iommu: Avoid more races around device probe 2023-11-27 10:53:55 +01:00
iova.c iommu/iova: Manage the depot list size 2023-09-25 12:07:44 +02:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Convert to generic_single_device_group() 2023-09-25 11:51:07 +02:00
irq_remapping.c x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
irq_remapping.h x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
Kconfig IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
Makefile iommu/tegra-gart: Remove tegra-gart 2023-09-25 11:40:54 +02:00
msm_iommu.c iommu: Allow .iotlb_sync_map to fail and handle s390's -ENOMEM return 2023-10-02 08:42:57 +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 Merge branches 'iommu/fixes', 'arm/tegra', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd', 'core' and 's390' into next 2023-10-27 09:13:40 +02:00
mtk_iommu_v1.c iommu: Convert remaining simple drivers to domain_alloc_paging() 2023-09-25 11:41:06 +02:00
of_iommu.c iommu: Don't reserve 0-length IOVA region 2024-01-25 15:45:23 -08:00
omap-iommu-debug.c iommu/omap: Fix buffer overflow in debugfs 2022-09-07 10:42:28 +02:00
omap-iommu.c iommu/omap: Update to {map,unmap}_pages 2023-09-25 12:04:36 +02:00
omap-iommu.h iommu/omap: Convert to generic_single_device_group() 2023-09-25 11:52:08 +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: Update to {map,unmap}_pages 2023-09-25 12:04:37 +02:00
s390-iommu.c iommu/dma: Allow a single FQ in addition to per-CPU FQs 2023-10-02 08:43:03 +02:00
sprd-iommu.c iommu: Allow .iotlb_sync_map to fail and handle s390's -ENOMEM return 2023-10-02 08:42:57 +02:00
sun50i-iommu.c iommu: Allow .iotlb_sync_map to fail and handle s390's -ENOMEM return 2023-10-02 08:42:57 +02:00
tegra-smmu.c Merge branches 'iommu/fixes', 'arm/tegra', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd', 'core' and 's390' into next 2023-10-27 09:13:40 +02:00
virtio-iommu.c iommu/virtio: Add __counted_by for struct viommu_request and use struct_size() 2023-10-16 09:37:31 +02:00