mirror of
https://github.com/torvalds/linux.git
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726e2d0cf2
- support DMA zones for arm64 systems where memory starts at > 4GB
(Baruch Siach, Catalin Marinas)
- support direct calls into dma-iommu and thus obsolete dma_map_ops for
many common configurations (Leon Romanovsky)
- add DMA-API tracing (Sean Anderson)
- remove the not very useful return value from various dma_set_* APIs
(Christoph Hellwig)
- misc cleanups and minor optimizations (Chen Y, Yosry Ahmed,
Christoph Hellwig)
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Merge tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- support DMA zones for arm64 systems where memory starts at > 4GB
(Baruch Siach, Catalin Marinas)
- support direct calls into dma-iommu and thus obsolete dma_map_ops for
many common configurations (Leon Romanovsky)
- add DMA-API tracing (Sean Anderson)
- remove the not very useful return value from various dma_set_* APIs
(Christoph Hellwig)
- misc cleanups and minor optimizations (Chen Y, Yosry Ahmed, Christoph
Hellwig)
* tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: reflow dma_supported
dma-mapping: reliably inform about DMA support for IOMMU
dma-mapping: add tracing for dma-mapping API calls
dma-mapping: use IOMMU DMA calls for common alloc/free page calls
dma-direct: optimize page freeing when it is not addressable
dma-mapping: clearly mark DMA ops as an architecture feature
vdpa_sim: don't select DMA_OPS
arm64: mm: keep low RAM dma zone
dma-mapping: don't return errors from dma_set_max_seg_size
dma-mapping: don't return errors from dma_set_seg_boundary
dma-mapping: don't return errors from dma_set_min_align_mask
scsi: check that busses support the DMA API before setting dma parameters
arm64: mm: fix DMA zone when dma-ranges is missing
dma-mapping: direct calls for dma-iommu
dma-mapping: call ->unmap_page and ->unmap_sg unconditionally
arm64: support DMA zone above 4GB
dma-mapping: replace zone_dma_bits by zone_dma_limit
dma-mapping: use bit masking to check VM_DMA_COHERENT
523 lines
16 KiB
Plaintext
523 lines
16 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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# The IOVA library may also be used by non-IOMMU_API users
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config IOMMU_IOVA
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tristate
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# IOMMU_API always gets selected by whoever wants it.
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config IOMMU_API
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bool
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config IOMMUFD_DRIVER
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bool
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default n
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menuconfig IOMMU_SUPPORT
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bool "IOMMU Hardware Support"
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depends on MMU
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default y
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help
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Say Y here if you want to compile device drivers for IO Memory
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Management Units into the kernel. These devices usually allow to
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remap DMA requests and/or remap interrupts from other devices on the
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system.
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if IOMMU_SUPPORT
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menu "Generic IOMMU Pagetable Support"
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# Selected by the actual pagetable implementations
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config IOMMU_IO_PGTABLE
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bool
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config IOMMU_IO_PGTABLE_LPAE
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bool "ARMv7/v8 Long Descriptor Format"
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select IOMMU_IO_PGTABLE
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depends on ARM || ARM64 || COMPILE_TEST
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depends on !GENERIC_ATOMIC64 # for cmpxchg64()
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help
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Enable support for the ARM long descriptor pagetable format.
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This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
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sizes at both stage-1 and stage-2, as well as address spaces
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up to 48-bits in size.
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config IOMMU_IO_PGTABLE_LPAE_SELFTEST
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bool "LPAE selftests"
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depends on IOMMU_IO_PGTABLE_LPAE
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help
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Enable self-tests for LPAE page table allocator. This performs
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a series of page-table consistency checks during boot.
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If unsure, say N here.
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config IOMMU_IO_PGTABLE_ARMV7S
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bool "ARMv7/v8 Short Descriptor Format"
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select IOMMU_IO_PGTABLE
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depends on ARM || ARM64 || COMPILE_TEST
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help
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Enable support for the ARM Short-descriptor pagetable format.
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This supports 32-bit virtual and physical addresses mapped using
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2-level tables with 4KB pages/1MB sections, and contiguous entries
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for 64KB pages/16MB supersections if indicated by the IOMMU driver.
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config IOMMU_IO_PGTABLE_ARMV7S_SELFTEST
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bool "ARMv7s selftests"
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depends on IOMMU_IO_PGTABLE_ARMV7S
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help
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Enable self-tests for ARMv7s page table allocator. This performs
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a series of page-table consistency checks during boot.
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If unsure, say N here.
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config IOMMU_IO_PGTABLE_DART
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bool "Apple DART Formats"
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select IOMMU_IO_PGTABLE
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depends on ARM64 || COMPILE_TEST
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depends on !GENERIC_ATOMIC64 # for cmpxchg64()
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help
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Enable support for the Apple DART pagetable formats. These include
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the t8020 and t6000/t8110 DART formats used in Apple M1/M2 family
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SoCs.
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If unsure, say N here.
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endmenu
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config IOMMU_DEBUGFS
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bool "Export IOMMU internals in DebugFS"
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depends on DEBUG_FS
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help
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Allows exposure of IOMMU device internals. This option enables
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the use of debugfs by IOMMU drivers as required. Devices can,
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at initialization time, cause the IOMMU code to create a top-level
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debug/iommu directory, and then populate a subdirectory with
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entries as required.
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choice
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prompt "IOMMU default domain type"
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depends on IOMMU_API
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default IOMMU_DEFAULT_DMA_LAZY if X86 || S390
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default IOMMU_DEFAULT_DMA_STRICT
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help
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Choose the type of IOMMU domain used to manage DMA API usage by
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device drivers. The options here typically represent different
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levels of tradeoff between robustness/security and performance,
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depending on the IOMMU driver. Not all IOMMUs support all options.
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This choice can be overridden at boot via the command line, and for
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some devices also at runtime via sysfs.
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If unsure, keep the default.
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config IOMMU_DEFAULT_DMA_STRICT
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bool "Translated - Strict"
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help
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Trusted devices use translation to restrict their access to only
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DMA-mapped pages, with strict TLB invalidation on unmap. Equivalent
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to passing "iommu.passthrough=0 iommu.strict=1" on the command line.
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Untrusted devices always use this mode, with an additional layer of
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bounce-buffering such that they cannot gain access to any unrelated
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data within a mapped page.
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config IOMMU_DEFAULT_DMA_LAZY
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bool "Translated - Lazy"
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help
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Trusted devices use translation to restrict their access to only
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DMA-mapped pages, but with "lazy" batched TLB invalidation. This
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mode allows higher performance with some IOMMUs due to reduced TLB
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flushing, but at the cost of reduced isolation since devices may be
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able to access memory for some time after it has been unmapped.
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Equivalent to passing "iommu.passthrough=0 iommu.strict=0" on the
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command line.
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If this mode is not supported by the IOMMU driver, the effective
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runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT.
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config IOMMU_DEFAULT_PASSTHROUGH
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bool "Passthrough"
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help
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Trusted devices are identity-mapped, giving them unrestricted access
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to memory with minimal performance overhead. Equivalent to passing
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"iommu.passthrough=1" (historically "iommu=pt") on the command line.
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If this mode is not supported by the IOMMU driver, the effective
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runtime default will fall back to IOMMU_DEFAULT_DMA_STRICT.
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endchoice
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config OF_IOMMU
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def_bool y
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depends on OF && IOMMU_API
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# IOMMU-agnostic DMA-mapping layer
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config IOMMU_DMA
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def_bool ARM64 || X86 || S390
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select DMA_OPS_HELPERS
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select IOMMU_API
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select IOMMU_IOVA
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select IRQ_MSI_IOMMU
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select NEED_SG_DMA_LENGTH
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select NEED_SG_DMA_FLAGS if SWIOTLB
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# Shared Virtual Addressing
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config IOMMU_SVA
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select IOMMU_MM_DATA
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bool
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config IOMMU_IOPF
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bool
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config FSL_PAMU
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bool "Freescale IOMMU support"
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depends on PCI
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depends on PHYS_64BIT
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depends on PPC_E500MC || (COMPILE_TEST && PPC)
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select IOMMU_API
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select GENERIC_ALLOCATOR
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help
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Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
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PAMU can authorize memory access, remap the memory address, and remap I/O
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transaction types.
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# MSM IOMMU support
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config MSM_IOMMU
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bool "MSM IOMMU Support"
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depends on ARM
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depends on ARCH_QCOM || COMPILE_TEST
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select IOMMU_API
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select IOMMU_IO_PGTABLE_ARMV7S
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help
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Support for the IOMMUs found on certain Qualcomm SOCs.
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These IOMMUs allow virtualization of the address space used by most
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cores within the multimedia subsystem.
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If unsure, say N here.
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source "drivers/iommu/amd/Kconfig"
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source "drivers/iommu/intel/Kconfig"
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source "drivers/iommu/iommufd/Kconfig"
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config IRQ_REMAP
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bool "Support for Interrupt Remapping"
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depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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select DMAR_TABLE if INTEL_IOMMU
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help
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Supports Interrupt remapping for IO-APIC and MSI devices.
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To use x2apic mode in the CPU's which support x2APIC enhancements or
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to support platforms with CPU's having > 8 bit APIC ID, say Y.
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# OMAP IOMMU support
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config OMAP_IOMMU
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bool "OMAP IOMMU Support"
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depends on ARCH_OMAP2PLUS || COMPILE_TEST
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select IOMMU_API
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help
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The OMAP3 media platform drivers depend on iommu support,
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if you need them say Y here.
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config OMAP_IOMMU_DEBUG
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bool "Export OMAP IOMMU internals in DebugFS"
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depends on OMAP_IOMMU && DEBUG_FS
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help
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Select this to see extensive information about
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the internal state of OMAP IOMMU in debugfs.
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Say N unless you know you need this.
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config ROCKCHIP_IOMMU
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bool "Rockchip IOMMU Support"
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depends on ARCH_ROCKCHIP || COMPILE_TEST
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select IOMMU_API
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select ARM_DMA_USE_IOMMU
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help
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Support for IOMMUs found on Rockchip rk32xx SOCs.
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These IOMMUs allow virtualization of the address space used by most
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cores within the multimedia subsystem.
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Say Y here if you are using a Rockchip SoC that includes an IOMMU
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device.
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config SUN50I_IOMMU
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bool "Allwinner H6 IOMMU Support"
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depends on HAS_DMA
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depends on ARCH_SUNXI || COMPILE_TEST
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select ARM_DMA_USE_IOMMU
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select IOMMU_API
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help
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Support for the IOMMU introduced in the Allwinner H6 SoCs.
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config TEGRA_IOMMU_SMMU
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bool "NVIDIA Tegra SMMU Support"
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depends on ARCH_TEGRA
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depends on TEGRA_AHB
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depends on TEGRA_MC
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select IOMMU_API
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help
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This driver supports the IOMMU hardware (SMMU) found on NVIDIA Tegra
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SoCs (Tegra30 up to Tegra210).
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config EXYNOS_IOMMU
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bool "Exynos IOMMU Support"
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depends on ARCH_EXYNOS || COMPILE_TEST
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depends on !CPU_BIG_ENDIAN # revisit driver if we can enable big-endian ptes
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select IOMMU_API
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select ARM_DMA_USE_IOMMU
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help
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Support for the IOMMU (System MMU) of Samsung Exynos application
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processor family. This enables H/W multimedia accelerators to see
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non-linear physical memory chunks as linear memory in their
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address space.
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If unsure, say N here.
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config EXYNOS_IOMMU_DEBUG
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bool "Debugging log for Exynos IOMMU"
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depends on EXYNOS_IOMMU
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help
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Select this to see the detailed log message that shows what
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happens in the IOMMU driver.
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Say N unless you need kernel log message for IOMMU debugging.
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config IPMMU_VMSA
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bool "Renesas VMSA-compatible IPMMU"
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depends on ARCH_RENESAS || COMPILE_TEST
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depends on ARM || ARM64 || COMPILE_TEST
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depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select ARM_DMA_USE_IOMMU
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help
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Support for the Renesas VMSA-compatible IPMMU found in the R-Mobile
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APE6, R-Car Gen{2,3} and RZ/G{1,2} SoCs.
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If unsure, say N.
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config SPAPR_TCE_IOMMU
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bool "sPAPR TCE IOMMU Support"
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depends on PPC_POWERNV || PPC_PSERIES
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select IOMMU_API
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help
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Enables bits of IOMMU API required by VFIO. The iommu_ops
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is not implemented as it is not necessary for VFIO.
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config APPLE_DART
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tristate "Apple DART IOMMU Support"
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depends on ARCH_APPLE || COMPILE_TEST
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depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_DART
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select IOMMU_API
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select IOMMU_IO_PGTABLE_DART
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default ARCH_APPLE
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help
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Support for Apple DART (Device Address Resolution Table) IOMMUs
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found in Apple ARM SoCs like the M1.
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This IOMMU is required for most peripherals using DMA to access
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the main memory.
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Say Y here if you are using an Apple SoC.
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# ARM IOMMU support
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config ARM_SMMU
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tristate "ARM Ltd. System MMU (SMMU) Support"
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depends on ARM64 || ARM || COMPILE_TEST
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depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select ARM_DMA_USE_IOMMU if ARM
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help
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Support for implementations of the ARM System MMU architecture
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versions 1 and 2.
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Say Y here if your SoC includes an IOMMU device implementing
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the ARM SMMU architecture.
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config ARM_SMMU_LEGACY_DT_BINDINGS
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bool "Support the legacy \"mmu-masters\" devicetree bindings"
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depends on ARM_SMMU=y && OF
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help
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Support for the badly designed and deprecated "mmu-masters"
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devicetree bindings. This allows some DMA masters to attach
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to the SMMU but does not provide any support via the DMA API.
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If you're lucky, you might be able to get VFIO up and running.
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If you say Y here then you'll make me very sad. Instead, say N
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and move your firmware to the utopian future that was 2016.
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config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
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bool "Default to disabling bypass on ARM SMMU v1 and v2"
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depends on ARM_SMMU
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default y
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help
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Say Y here to (by default) disable bypass streams such that
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incoming transactions from devices that are not attached to
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an iommu domain will report an abort back to the device and
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will not be allowed to pass through the SMMU.
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Any old kernels that existed before this KConfig was
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introduced would default to _allowing_ bypass (AKA the
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equivalent of NO for this config). However the default for
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this option is YES because the old behavior is insecure.
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There are few reasons to allow unmatched stream bypass, and
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even fewer good ones. If saying YES here breaks your board
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you should work on fixing your board. This KConfig option
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is expected to be removed in the future and we'll simply
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hardcode the bypass disable in the code.
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NOTE: the kernel command line parameter
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'arm-smmu.disable_bypass' will continue to override this
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config.
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config ARM_SMMU_QCOM
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def_tristate y
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depends on ARM_SMMU && ARCH_QCOM
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select QCOM_SCM
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help
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When running on a Qualcomm platform that has the custom variant
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of the ARM SMMU, this needs to be built into the SMMU driver.
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config ARM_SMMU_QCOM_DEBUG
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bool "ARM SMMU QCOM implementation defined debug support"
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depends on ARM_SMMU_QCOM=y
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help
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Support for implementation specific debug features in ARM SMMU
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hardware found in QTI platforms. This include support for
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the Translation Buffer Units (TBU) that can be used to obtain
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additional information when debugging memory management issues
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like context faults.
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Say Y here to enable debug for issues such as context faults
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or TLB sync timeouts which requires implementation defined
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register dumps.
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config ARM_SMMU_V3
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tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
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depends on ARM64
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select IOMMU_API
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select IOMMU_IO_PGTABLE_LPAE
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select GENERIC_MSI_IRQ
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select IOMMUFD_DRIVER if IOMMUFD
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help
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Support for implementations of the ARM System MMU architecture
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version 3 providing translation support to a PCIe root complex.
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Say Y here if your system includes an IOMMU device implementing
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the ARM SMMUv3 architecture.
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if ARM_SMMU_V3
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config ARM_SMMU_V3_SVA
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bool "Shared Virtual Addressing support for the ARM SMMUv3"
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select IOMMU_SVA
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select IOMMU_IOPF
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select MMU_NOTIFIER
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help
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Support for sharing process address spaces with devices using the
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SMMUv3.
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Say Y here if your system supports SVA extensions such as PCIe PASID
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and PRI.
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config ARM_SMMU_V3_KUNIT_TEST
|
|
tristate "KUnit tests for arm-smmu-v3 driver" if !KUNIT_ALL_TESTS
|
|
depends on KUNIT
|
|
depends on ARM_SMMU_V3_SVA
|
|
default KUNIT_ALL_TESTS
|
|
help
|
|
Enable this option to unit-test arm-smmu-v3 driver functions.
|
|
|
|
If unsure, say N.
|
|
|
|
config TEGRA241_CMDQV
|
|
bool "NVIDIA Tegra241 CMDQ-V extension support for ARM SMMUv3"
|
|
depends on ACPI
|
|
help
|
|
Support for NVIDIA CMDQ-Virtualization extension for ARM SMMUv3. The
|
|
CMDQ-V extension is similar to v3.3 ECMDQ for multi command queues
|
|
support, except with virtualization capabilities.
|
|
|
|
Say Y here if your system is NVIDIA Tegra241 (Grace) or it has the same
|
|
CMDQ-V extension.
|
|
endif
|
|
|
|
config S390_IOMMU
|
|
def_bool y if S390 && PCI
|
|
depends on S390 && PCI
|
|
select IOMMU_API
|
|
help
|
|
Support for the IOMMU API for s390 PCI devices.
|
|
|
|
config MTK_IOMMU
|
|
tristate "MediaTek IOMMU Support"
|
|
depends on ARCH_MEDIATEK || COMPILE_TEST
|
|
select ARM_DMA_USE_IOMMU
|
|
select IOMMU_API
|
|
select IOMMU_IO_PGTABLE_ARMV7S
|
|
select MEMORY
|
|
select MTK_SMI
|
|
help
|
|
Support for the M4U on certain Mediatek SOCs. M4U is MultiMedia
|
|
Memory Management Unit. This option enables remapping of DMA memory
|
|
accesses for the multimedia subsystem.
|
|
|
|
If unsure, say N here.
|
|
|
|
config MTK_IOMMU_V1
|
|
tristate "MediaTek IOMMU Version 1 (M4U gen1) Support"
|
|
depends on ARM
|
|
depends on ARCH_MEDIATEK || COMPILE_TEST
|
|
select ARM_DMA_USE_IOMMU
|
|
select IOMMU_API
|
|
select MEMORY
|
|
select MTK_SMI
|
|
help
|
|
Support for the M4U on certain Mediatek SoCs. M4U generation 1 HW is
|
|
Multimedia Memory Managememt Unit. This option enables remapping of
|
|
DMA memory accesses for the multimedia subsystem.
|
|
|
|
if unsure, say N here.
|
|
|
|
config QCOM_IOMMU
|
|
# Note: iommu drivers cannot (yet?) be built as modules
|
|
bool "Qualcomm IOMMU Support"
|
|
depends on ARCH_QCOM || COMPILE_TEST
|
|
depends on !GENERIC_ATOMIC64 # for IOMMU_IO_PGTABLE_LPAE
|
|
select QCOM_SCM
|
|
select IOMMU_API
|
|
select IOMMU_IO_PGTABLE_LPAE
|
|
select ARM_DMA_USE_IOMMU
|
|
help
|
|
Support for IOMMU on certain Qualcomm SoCs.
|
|
|
|
config HYPERV_IOMMU
|
|
bool "Hyper-V IRQ Handling"
|
|
depends on HYPERV && X86
|
|
select IOMMU_API
|
|
default HYPERV
|
|
help
|
|
Stub IOMMU driver to handle IRQs to support Hyper-V Linux
|
|
guest and root partitions.
|
|
|
|
config VIRTIO_IOMMU
|
|
tristate "Virtio IOMMU driver"
|
|
depends on VIRTIO
|
|
depends on (ARM64 || X86)
|
|
select IOMMU_API
|
|
select INTERVAL_TREE
|
|
select ACPI_VIOT if ACPI
|
|
help
|
|
Para-virtualised IOMMU driver with virtio.
|
|
|
|
Say Y here if you intend to run this kernel as a guest.
|
|
|
|
config SPRD_IOMMU
|
|
tristate "Unisoc IOMMU Support"
|
|
depends on ARCH_SPRD || COMPILE_TEST
|
|
select IOMMU_API
|
|
help
|
|
Support for IOMMU on Unisoc's SoCs, this IOMMU can be used by
|
|
Unisoc's multimedia devices, such as display, Image codec(jpeg)
|
|
and a few signal processors, including VSP(video), GSP(graphic),
|
|
ISP(image), and CPP(camera pixel processor), etc.
|
|
|
|
Say Y here if you want to use the multimedia devices listed above.
|
|
|
|
endif # IOMMU_SUPPORT
|