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f0295913c4
linux/drivers/iommu
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Joerg Roedel f0295913c4 iommu/amd: Add kernel parameters to limit V1 page-sizes 
Add two new kernel command line parameters to limit the page-sizes
used for v1 page-tables:

	nohugepages     - Limits page-sizes to 4KiB

	v2_pgsizes_only - Limits page-sizes to 4Kib/2Mib/1GiB; The
	                  same as the sizes used with v2 page-tables

This is needed for multiple scenarios. When assigning devices to
SEV-SNP guests the IOMMU page-sizes need to match the sizes in the RMP
table, otherwise the device will not be able to access all shared
memory.

Also, some ATS devices do not work properly with arbitrary IO
page-sizes as supported by AMD-Vi, so limiting the sizes used by the
driver is a suitable workaround.

All-in-all, these parameters are only workarounds until the IOMMU core
and related APIs gather the ability to negotiate the page-sizes in a
better way.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20240905072240.253313-1-joro@8bytes.org
2024-09-10 11:48:57 +02:00
..
amd iommu/amd: Add kernel parameters to limit V1 page-sizes 2024-09-10 11:48:57 +02:00
arm iommu: arm-smmu: Fix Tegra workaround for PAGE_SIZE mappings 2024-07-25 13:08:44 +01:00
intel IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
iommufd IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
apple-dart.c iommu: constify of_phandle_args in xlate 2024-03-01 13:46:57 +01:00
dma-iommu.c dma-mapping updates for Linux 6.11 2024-07-19 10:20:26 -07:00
dma-iommu.h iommu/dma: Centralise iommu_setup_dma_ops() 2024-04-26 12:07:26 +02:00
exynos-iommu.c iommu/exynos: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:45 +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
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
hyperv-iommu.c x86/vector: Rename send_cleanup_vector() to vector_schedule_cleanup() 2023-08-06 14:15:09 +02:00
io-pgfault.c iommufd: Add iommufd fault object 2024-07-09 13:54:32 -03:00
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/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping 2024-07-03 15:45:47 +01:00
io-pgtable-arm.h
io-pgtable-dart.c iommu/io-pgtable-dart: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:44 +02:00
io-pgtable.c iommu: Allow passing custom allocators to pgtable drivers 2023-11-27 11:10:12 +01:00
iommu-debugfs.c
iommu-pages.h iommu: account IOMMU allocated memory 2024-04-15 14:31:48 +02:00
iommu-priv.h Merge branch 'iommu/iommufd/attach-handles' into iommu/next 2024-07-12 16:57:42 +01:00
iommu-sva.c Merge branch 'iommu/iommufd/attach-handles' into iommu/next 2024-07-12 16:57:42 +01:00
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 Merge branch 'iommu/iommufd/paging-domain-alloc' into iommu/next 2024-07-12 16:57:47 +01:00
iova.c iommu/iova: Add missing MODULE_DESCRIPTION() macro 2024-06-14 16:51:10 +02:00
ipmmu-vmsa.c Merge branches 'arm/mediatek', 'arm/renesas', 'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next 2024-03-08 09:05:59 +01:00
irq_remapping.c IOMMU Updates for Linux v6.10 2024-05-18 10:55:13 -07:00
irq_remapping.h iommu/vt-d: Allocate DMAR fault interrupts locally 2024-04-26 11:57:36 +02:00
Kconfig iommu/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping 2024-07-03 15:45:47 +01:00
Makefile iommu: Separate SVA and IOPF 2024-02-16 15:19:29 +01:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu: constify of_phandle_args in xlate 2024-03-01 13:46:57 +01:00
msm_iommu.h
mtk_iommu_v1.c iommu: Resolve fwspec ops automatically 2024-07-04 14:36:03 +01:00
mtk_iommu.c iommu: mtk: fix module autoloading 2024-04-12 12:04:50 +02:00
of_iommu.c Merge branch 'iommu/pci/ats' into iommu/next 2024-07-12 16:57:34 +01:00
omap-iommu-debug.c
omap-iommu.c iommu: Mark dev_iommu_priv_set() with a lockdep 2023-12-12 10:18:49 +01:00
omap-iommu.h iommu/omap: Convert to generic_single_device_group() 2023-09-25 11:52:08 +02:00
omap-iopgtable.h
rockchip-iommu.c iommu/rockchip: use page allocation function provided by iommu-pages.h 2024-04-15 14:31:45 +02:00
s390-iommu.c iommu/dma: Centralise iommu_setup_dma_ops() 2024-04-26 12:07:26 +02:00
sprd-iommu.c iommu: sprd: Avoid NULL deref in sprd_iommu_hw_en 2024-07-23 17:09:28 +01:00
sun50i-iommu.c iommu: sun50i: Add H616 compatible string 2024-06-25 14:02:47 +02:00
tegra-smmu.c Merge branch 'iommu/fwspec-ops-removal' into iommu/next 2024-07-12 16:55:43 +01:00
virtio-iommu.c virtio: rename virtio_find_vqs_info() to virtio_find_vqs() 2024-07-17 05:20:58 -04:00