diff options
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 0b9d78a0f3ac..d2fade984999 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -82,7 +82,7 @@ config IOMMU_DEBUGFS config IOMMU_DEFAULT_PASSTHROUGH bool "IOMMU passthrough by default" depends on IOMMU_API - help + help Enable passthrough by default, removing the need to pass in iommu.passthrough=on or iommu=pt through command line. If this is enabled, you can still disable with iommu.passthrough=off @@ -91,8 +91,8 @@ config IOMMU_DEFAULT_PASSTHROUGH If unsure, say N here. config OF_IOMMU - def_bool y - depends on OF && IOMMU_API + def_bool y + depends on OF && IOMMU_API # IOMMU-agnostic DMA-mapping layer config IOMMU_DMA @@ -214,6 +214,7 @@ config INTEL_IOMMU_SVM select PCI_PASID select PCI_PRI select MMU_NOTIFIER + select IOASID help Shared Virtual Memory (SVM) provides a facility for devices to access DMA resources through process address space by @@ -248,6 +249,18 @@ config INTEL_IOMMU_FLOPPY_WA workaround will setup a 1:1 mapping for the first 16MiB to make floppy (an ISA device) work. +config INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON + bool "Enable Intel IOMMU scalable mode by default" + depends on INTEL_IOMMU + help + Selecting this option will enable by default the scalable mode if + hardware presents the capability. The scalable mode is defined in + VT-d 3.0. The scalable mode capability could be checked by reading + /sys/devices/virtual/iommu/dmar*/intel-iommu/ecap. If this option + is not selected, scalable mode support could also be enabled by + passing intel_iommu=sm_on to the kernel. If not sure, please use + the default value. + config IRQ_REMAP bool "Support for Interrupt Remapping" depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI @@ -356,7 +369,7 @@ config SPAPR_TCE_IOMMU # ARM IOMMU support config ARM_SMMU - bool "ARM Ltd. System MMU (SMMU) Support" + tristate "ARM Ltd. System MMU (SMMU) Support" depends on (ARM64 || ARM) && MMU select IOMMU_API select IOMMU_IO_PGTABLE_LPAE @@ -368,6 +381,18 @@ config ARM_SMMU Say Y here if your SoC includes an IOMMU device implementing the ARM SMMU architecture. +config ARM_SMMU_LEGACY_DT_BINDINGS + bool "Support the legacy \"mmu-masters\" devicetree bindings" + depends on ARM_SMMU=y && OF + help + Support for the badly designed and deprecated "mmu-masters" + devicetree bindings. This allows some DMA masters to attach + to the SMMU but does not provide any support via the DMA API. + If you're lucky, you might be able to get VFIO up and running. + + If you say Y here then you'll make me very sad. Instead, say N + and move your firmware to the utopian future that was 2016. + config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT bool "Default to disabling bypass on ARM SMMU v1 and v2" depends on ARM_SMMU @@ -394,7 +419,7 @@ config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT config. config ARM_SMMU_V3 - bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" + tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support" depends on ARM64 select IOMMU_API select IOMMU_IO_PGTABLE_LPAE |