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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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eb1eb7ae65
When the IOAPIC information provided in the IVRS table is not correct or not complete the system may not boot at all when interrupt remapping is enabled. So check if this information is correct and print out a firmware bug message when it is not. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
191 lines
5.9 KiB
Plaintext
191 lines
5.9 KiB
Plaintext
# 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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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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config OF_IOMMU
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def_bool y
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depends on OF
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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 ARCH_MSM8X60 || ARCH_MSM8960
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select IOMMU_API
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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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config IOMMU_PGTABLES_L2
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def_bool y
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depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
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# AMD IOMMU support
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config AMD_IOMMU
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bool "AMD IOMMU support"
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select SWIOTLB
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select PCI_MSI
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select PCI_ATS
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select PCI_PRI
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select PCI_PASID
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select IOMMU_API
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depends on X86_64 && PCI && ACPI && X86_IO_APIC
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---help---
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With this option you can enable support for AMD IOMMU hardware in
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your system. An IOMMU is a hardware component which provides
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remapping of DMA memory accesses from devices. With an AMD IOMMU you
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can isolate the DMA memory of different devices and protect the
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system from misbehaving device drivers or hardware.
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You can find out if your system has an AMD IOMMU if you look into
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your BIOS for an option to enable it or if you have an IVRS ACPI
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table.
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config AMD_IOMMU_STATS
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bool "Export AMD IOMMU statistics to debugfs"
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depends on AMD_IOMMU
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select DEBUG_FS
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---help---
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This option enables code in the AMD IOMMU driver to collect various
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statistics about whats happening in the driver and exports that
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information to userspace via debugfs.
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If unsure, say N.
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config AMD_IOMMU_V2
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tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
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depends on AMD_IOMMU && PROFILING && EXPERIMENTAL
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select MMU_NOTIFIER
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---help---
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This option enables support for the AMD IOMMUv2 features of the IOMMU
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hardware. Select this option if you want to use devices that support
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the PCI PRI and PASID interface.
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# Intel IOMMU support
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config DMAR_TABLE
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bool
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config INTEL_IOMMU
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bool "Support for Intel IOMMU using DMA Remapping Devices"
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depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
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select IOMMU_API
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select DMAR_TABLE
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help
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DMA remapping (DMAR) devices support enables independent address
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translations for Direct Memory Access (DMA) from devices.
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These DMA remapping devices are reported via ACPI tables
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and include PCI device scope covered by these DMA
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remapping devices.
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config INTEL_IOMMU_DEFAULT_ON
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def_bool y
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prompt "Enable Intel DMA Remapping Devices by default"
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depends on INTEL_IOMMU
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help
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Selecting this option will enable a DMAR device at boot time if
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one is found. If this option is not selected, DMAR support can
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be enabled by passing intel_iommu=on to the kernel.
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config INTEL_IOMMU_BROKEN_GFX_WA
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bool "Workaround broken graphics drivers (going away soon)"
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depends on INTEL_IOMMU && BROKEN && X86
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---help---
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Current Graphics drivers tend to use physical address
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for DMA and avoid using DMA APIs. Setting this config
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option permits the IOMMU driver to set a unity map for
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all the OS-visible memory. Hence the driver can continue
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to use physical addresses for DMA, at least until this
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option is removed in the 2.6.32 kernel.
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config INTEL_IOMMU_FLOPPY_WA
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def_bool y
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depends on INTEL_IOMMU && X86
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---help---
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Floppy disk drivers are known to bypass DMA API calls
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thereby failing to work when IOMMU is enabled. This
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workaround will setup a 1:1 mapping for the first
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16MiB to make floppy (an ISA device) work.
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config IRQ_REMAP
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bool "Support for Interrupt Remapping (EXPERIMENTAL)"
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depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
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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_OMAP
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select IOMMU_API
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config OMAP_IOVMM
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tristate "OMAP IO Virtual Memory Manager Support"
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depends on OMAP_IOMMU
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config OMAP_IOMMU_DEBUG
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tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
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depends on OMAP_IOVMM && 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/IOVMM in debugfs.
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Say N unless you know you need this.
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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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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 "Tegra SMMU IOMMU Support"
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depends on ARCH_TEGRA_3x_SOC && TEGRA_AHB
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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 SMMU (System Memory Management Unit)
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hardware included on Tegra SoCs.
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config EXYNOS_IOMMU
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bool "Exynos IOMMU Support"
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depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
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select IOMMU_API
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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 accellerators to see
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non-linear physical memory chunks as a linear memory in their
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address spaces
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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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endif # IOMMU_SUPPORT
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