544da6541b
Add gen3auto based values for ARM_SMMU_STATS_SYNC_INV_TBU_ACK, ARM_SMMU_TESTBUS_SEL & ARM_SMMU_TESTBUS registers. Modify TESTBUS tcu base offset ARM_SMMU_TCU_TESTBUS_HLOS1_NS -> ARM_SMMU_TESTBUS_SEL_HLOS1_NS and sync invalid TBU acknowledgment as ARM_SMMU_IMPL_DEF0 instead ARM_SMMU_IMPL_DEF5. Change-Id: I4040932104e6630690e1c6bfa54f889b9432b9bb Signed-off-by: Madhu Ananthula <quic_mananthu@quicinc.com>
680 lines
21 KiB
Plaintext
680 lines
21 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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# The IOASID library may also be used by non-IOMMU_API users
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config IOASID
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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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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 && !GENERIC_ATOMIC64)
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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_FAST
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bool "Fast ARMv7/v8 Long Descriptor Format"
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depends on (ARM || ARM64) && IOMMU_DMA
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help
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Enable support for a subset of the ARM long descriptor pagetable
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format. This allocator achieves fast performance by
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pre-allocating and pre-populating page table memory up front.
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only supports a 32 bit virtual address space.
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This implementation is mainly optimized for use cases where the
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buffers are small (<= 64K) since it only supports 4K page sizes.
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config IOMMU_IO_PGTABLE_FAST_SELFTEST
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bool "Fast IO pgtable selftests"
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depends on IOMMU_IO_PGTABLE_FAST
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help
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Enable self-tests for "fast" page table allocator.
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This performs a series of page-table consistency checks
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during boot.
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If unsure, say N here.
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config IOMMU_IO_PGTABLE_FAST_PROVE_TLB
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bool "Prove correctness of TLB maintenance in the Fast DMA mapper"
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depends on IOMMU_IO_PGTABLE_FAST
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help
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Enables some debug features that help prove correctness of TLB
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maintenance routines in the Fast DMA mapper. This option will
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slow things down considerably, so should only be used in a debug
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configuration. This relies on the ability to set bits in an
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invalid page table entry, which is disallowed on some hardware
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due to errata. If you're running on such a platform then this
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option can only be used with unit tests. It will break real use
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cases.
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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 && !GENERIC_ATOMIC64)
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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 || IA64
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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 || IA64 || X86
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select DMA_OPS
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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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# Shared Virtual Addressing
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config IOMMU_SVA
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bool
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select IOASID
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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_MSM8X60 || ARCH_MSM8960 || 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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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
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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_GART
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bool "Tegra GART IOMMU Support"
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depends on ARCH_TEGRA_2x_SOC
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depends on TEGRA_MC
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select IOMMU_API
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help
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Enables support for remapping discontiguous physical memory
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shared with the operating system into contiguous I/O virtual
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space through the GART (Graphics Address Relocation Table)
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hardware included on Tegra 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 && !GENERIC_ATOMIC64)
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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 QTI_IOMMU_SUPPORT
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tristate "Support for QTI iommu drivers"
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help
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The QTI GPU device may switch between multiple iommu domains,
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depending on usecase. This introduces a need to track all such
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domains in a non-driver specific manner.
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If in doubt say N.
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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 && !GENERIC_ATOMIC64)
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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 && !GENERIC_ATOMIC64)
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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_CONTEXT_FAULT_RETRY
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bool "Context fault retry sequence"
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depends on ARM_SMMU && ARCH_WAIPIO
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help
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In some cases, issuing a tlb invalidate operation after a
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context fault may cause a subsequent retry of the failing
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address to succeed. Only applies to clients which have
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stall-on-fault enabled, like display.
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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_SELFTEST
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bool "ARM SMMU self test support"
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depends on ARM_SMMU
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help
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Enables self tests for arm smmu. Tests basic hardware
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configurations like interrupts. Note that enabling this
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option can marginally increase the boot time.
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If unsure, say N here.
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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
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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.
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Say Y here to enable debug for issues such as TLB sync timeouts
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which requires implementation defined register dumps.
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config ARM_SMMU_TESTBUS
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bool "Enable ARM SMMU testbus feature "
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depends on ARM_SMMU
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help
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Enable testbus feature to help in capturing TCU/TBU state and
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help debug TLB Sync timeout failure.Enables option for testbus
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debugfs to select and read testbus output.
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Note to use this only on debug builds.
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If unsure, say N here.
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config ARM_SMMU_TESTBUS_DEBUGFS
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bool "Expose testbus control debugfs nodes"
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depends on ARM_SMMU && IOMMU_DEBUGFS && ARM_SMMU_TESTBUS
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help
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Support for exposing debugfs nodes to set testbus select values
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for selecting a testbus to inspect for a particular TCU/TBU
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on an SMMU. This also exposes debugfs nodes to read testbus output
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after the output has been selected.
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config ARM_SMMU_CAPTUREBUS_DEBUGFS
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bool "Expose capturebus control debugfs nodes"
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depends on ARM_SMMU && QCOM_IOMMU_DEBUG
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help
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Support for exposing debugfs nodes to configure capturebus for each
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tbu of an SMMU. This also exposes debugfs nodes to get the snapshot
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of capturebus.
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If unsure, say N here.
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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_DOMAIN
|
|
help
|
|
Support for implementations of the ARM System MMU architecture
|
|
version 3 providing translation support to a PCIe root complex.
|
|
|
|
Say Y here if your system includes an IOMMU device implementing
|
|
the ARM SMMUv3 architecture.
|
|
|
|
config ARM_PARAVIRT_SMMU_V3
|
|
tristate "Paravirtualized ARM SMMU V3 driver support"
|
|
depends on ARM64
|
|
depends on QCOM_SCM
|
|
select IOMMU_API
|
|
select IOMMU_IO_PGTABLE_LPAE
|
|
select GENERIC_MSI_IRQ_DOMAIN
|
|
help
|
|
Support for a paravirtualized implementation of ARM SMMU V3
|
|
architecture.
|
|
|
|
Say Y here if your system has the corresponding backend
|
|
SMMU-v3 support available which runs at a higher exception
|
|
level.
|
|
|
|
config ARM_SMMU_V3_SVA
|
|
bool "Shared Virtual Addressing support for the ARM SMMUv3"
|
|
depends on ARM_SMMU_V3
|
|
select IOMMU_SVA
|
|
select MMU_NOTIFIER
|
|
help
|
|
Support for sharing process address spaces with devices using the
|
|
SMMUv3.
|
|
|
|
Say Y here if your system supports SVA extensions such as PCIe PASID
|
|
and PRI.
|
|
|
|
config IOMMU_TLBSYNC_DEBUG
|
|
bool "TLB sync timeout debug"
|
|
depends on ARM_SMMU
|
|
help
|
|
Collects the SMMU system state information after the
|
|
first TLB sync timeout failure by calling BUG() from
|
|
a workqueue thread. Note to use this only on debug
|
|
builds.
|
|
|
|
config ARM_SMMU_TESTBUS_DUMP
|
|
bool "ARM SMMU testbus dump"
|
|
depends on ARM_SMMU && ARM_SMMU_TESTBUS
|
|
help
|
|
Enables testbus dump collection on arm smmu right after TLB
|
|
sync timeout failure.
|
|
Note to use this only on debug builds.
|
|
|
|
If unsure, say N here.
|
|
|
|
config ARM_SMMU_TESTBUS_DUMP_GEN3AUTO
|
|
bool "ARM SMMU testbus dump for gen3auto"
|
|
depends on ARM_SMMU && ARM_SMMU_TESTBUS && ARM_SMMU_TESTBUS_DUMP
|
|
help
|
|
Enables testbus dump collection on arm smmu right after TLB
|
|
sync timeout failure on gen3auto.
|
|
Note to use this only on debug builds.
|
|
|
|
If unsure, say N here.
|
|
|
|
config QCOM_LAZY_MAPPING
|
|
tristate "Reference counted iommu-mapping support"
|
|
depends on QCOM_DMABUF_HEAPS
|
|
depends on IOMMU_API
|
|
help
|
|
DMA-BUFs may be shared between several software clients.
|
|
Reference counting the mapping may simplify coordination between
|
|
these clients, and decrease latency by preventing multiple
|
|
map/unmaps of the same region.
|
|
|
|
If unsure, say N here.
|
|
|
|
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 S390_CCW_IOMMU
|
|
bool "S390 CCW IOMMU Support"
|
|
depends on S390 && CCW || COMPILE_TEST
|
|
select IOMMU_API
|
|
help
|
|
Enables bits of IOMMU API required by VFIO. The iommu_ops
|
|
is not implemented as it is not necessary for VFIO.
|
|
|
|
config S390_AP_IOMMU
|
|
bool "S390 AP IOMMU Support"
|
|
depends on S390 && ZCRYPT || COMPILE_TEST
|
|
select IOMMU_API
|
|
help
|
|
Enables bits of IOMMU API required by VFIO. The iommu_ops
|
|
is not implemented as it is not necessary for VFIO.
|
|
|
|
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 && !GENERIC_ATOMIC64)
|
|
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 x2APIC IRQ Handling"
|
|
depends on HYPERV && X86
|
|
select IOMMU_API
|
|
default HYPERV
|
|
help
|
|
Stub IOMMU driver to handle IRQs as to allow Hyper-V Linux
|
|
guests to run with x2APIC mode enabled.
|
|
|
|
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 QCOM_IOMMU_UTIL
|
|
tristate "Support for qcom additions to the iommu framework"
|
|
help
|
|
QCOM iommu drivers support a general set of functionality in
|
|
addition to the functions provided by the iommu framework.
|
|
This includes devicetree properties for configuring iommu
|
|
groups and iova ranges.
|
|
|
|
Say N here if unsure.
|
|
|
|
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.
|
|
|
|
config QCOM_IOMMU_DEBUG
|
|
tristate "IOMMU debugging and testing"
|
|
depends on QCOM_IOMMU_UTIL
|
|
depends on DEBUG_FS
|
|
help
|
|
This option is used to enable profiling and debugging in
|
|
the IOMMU framework code. IOMMU profiling and debugging
|
|
can be done through the debugfs nodes which this option
|
|
makes available.
|
|
|
|
endif # IOMMU_SUPPORT
|