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Date: Sat, 13 Jun 2020 09:50:57 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Jerry Snitselaar <jsnitsel@...hat.com>,
linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc: baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH 1/2] iommu/vt-d: Move Kconfig and Makefile bits down into
intel directory
Hi Jerry,
On 2020/6/13 7:10, Jerry Snitselaar wrote:
> Move Intel Kconfig and Makefile bits down into intel directory
> with the rest of the Intel specific files.
>
> Cc: Joerg Roedel <joro@...tes.org>
> Cc: Lu Baolu <baolu.lu@...ux.intel.com>
Thanks!
Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>
Best regards,
baolu
> Signed-off-by: Jerry Snitselaar <jsnitsel@...hat.com>
> ---
> drivers/iommu/Kconfig | 86 +-----------------------------------
> drivers/iommu/Makefile | 8 +---
> drivers/iommu/intel/Kconfig | 86 ++++++++++++++++++++++++++++++++++++
> drivers/iommu/intel/Makefile | 7 +++
> 4 files changed, 96 insertions(+), 91 deletions(-)
> create mode 100644 drivers/iommu/intel/Kconfig
> create mode 100644 drivers/iommu/intel/Makefile
>
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index aca76383f201..b12d4ec124f6 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -176,91 +176,7 @@ config AMD_IOMMU_DEBUGFS
> This option is -NOT- intended for production environments, and should
> not generally be enabled.
>
> -# Intel IOMMU support
> -config DMAR_TABLE
> - bool
> -
> -config INTEL_IOMMU
> - bool "Support for Intel IOMMU using DMA Remapping Devices"
> - depends on PCI_MSI && ACPI && (X86 || IA64)
> - select IOMMU_API
> - select IOMMU_IOVA
> - select NEED_DMA_MAP_STATE
> - select DMAR_TABLE
> - select SWIOTLB
> - select IOASID
> - help
> - DMA remapping (DMAR) devices support enables independent address
> - translations for Direct Memory Access (DMA) from devices.
> - These DMA remapping devices are reported via ACPI tables
> - and include PCI device scope covered by these DMA
> - remapping devices.
> -
> -config INTEL_IOMMU_DEBUGFS
> - bool "Export Intel IOMMU internals in Debugfs"
> - depends on INTEL_IOMMU && IOMMU_DEBUGFS
> - help
> - !!!WARNING!!!
> -
> - DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!
> -
> - Expose Intel IOMMU internals in Debugfs.
> -
> - This option is -NOT- intended for production environments, and should
> - only be enabled for debugging Intel IOMMU.
> -
> -config INTEL_IOMMU_SVM
> - bool "Support for Shared Virtual Memory with Intel IOMMU"
> - depends on INTEL_IOMMU && X86
> - 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
> - means of a Process Address Space ID (PASID).
> -
> -config INTEL_IOMMU_DEFAULT_ON
> - def_bool y
> - prompt "Enable Intel DMA Remapping Devices by default"
> - depends on INTEL_IOMMU
> - help
> - Selecting this option will enable a DMAR device at boot time if
> - one is found. If this option is not selected, DMAR support can
> - be enabled by passing intel_iommu=on to the kernel.
> -
> -config INTEL_IOMMU_BROKEN_GFX_WA
> - bool "Workaround broken graphics drivers (going away soon)"
> - depends on INTEL_IOMMU && BROKEN && X86
> - ---help---
> - Current Graphics drivers tend to use physical address
> - for DMA and avoid using DMA APIs. Setting this config
> - option permits the IOMMU driver to set a unity map for
> - all the OS-visible memory. Hence the driver can continue
> - to use physical addresses for DMA, at least until this
> - option is removed in the 2.6.32 kernel.
> -
> -config INTEL_IOMMU_FLOPPY_WA
> - def_bool y
> - depends on INTEL_IOMMU && X86
> - ---help---
> - Floppy disk drivers are known to bypass DMA API calls
> - thereby failing to work when IOMMU is enabled. This
> - 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.
> +source "drivers/iommu/intel/Kconfig"
>
> config IRQ_REMAP
> bool "Support for Interrupt Remapping"
> diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
> index 342190196dfb..71dd2f382e78 100644
> --- a/drivers/iommu/Makefile
> +++ b/drivers/iommu/Makefile
> @@ -1,4 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0
> +obj-y += intel/
> obj-$(CONFIG_IOMMU_API) += iommu.o
> obj-$(CONFIG_IOMMU_API) += iommu-traces.o
> obj-$(CONFIG_IOMMU_API) += iommu-sysfs.o
> @@ -17,13 +18,8 @@ obj-$(CONFIG_AMD_IOMMU_V2) += amd/iommu_v2.o
> obj-$(CONFIG_ARM_SMMU) += arm_smmu.o
> arm_smmu-objs += arm-smmu.o arm-smmu-impl.o arm-smmu-qcom.o
> obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o
> -obj-$(CONFIG_DMAR_TABLE) += intel/dmar.o
> -obj-$(CONFIG_INTEL_IOMMU) += intel/iommu.o intel/pasid.o
> -obj-$(CONFIG_INTEL_IOMMU) += intel/trace.o
> -obj-$(CONFIG_INTEL_IOMMU_DEBUGFS) += intel/debugfs.o
> -obj-$(CONFIG_INTEL_IOMMU_SVM) += intel/svm.o
> obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o
> -obj-$(CONFIG_IRQ_REMAP) += intel/irq_remapping.o irq_remapping.o
> +obj-$(CONFIG_IRQ_REMAP) += irq_remapping.o
> obj-$(CONFIG_MTK_IOMMU) += mtk_iommu.o
> obj-$(CONFIG_MTK_IOMMU_V1) += mtk_iommu_v1.o
> obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
> diff --git a/drivers/iommu/intel/Kconfig b/drivers/iommu/intel/Kconfig
> new file mode 100644
> index 000000000000..ef5c4a7a9399
> --- /dev/null
> +++ b/drivers/iommu/intel/Kconfig
> @@ -0,0 +1,86 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +# Intel IOMMU support
> +config DMAR_TABLE
> + bool
> +
> +config INTEL_IOMMU
> + bool "Support for Intel IOMMU using DMA Remapping Devices"
> + depends on PCI_MSI && ACPI && (X86 || IA64)
> + select IOMMU_API
> + select IOMMU_IOVA
> + select NEED_DMA_MAP_STATE
> + select DMAR_TABLE
> + select SWIOTLB
> + select IOASID
> + help
> + DMA remapping (DMAR) devices support enables independent address
> + translations for Direct Memory Access (DMA) from devices.
> + These DMA remapping devices are reported via ACPI tables
> + and include PCI device scope covered by these DMA
> + remapping devices.
> +
> +config INTEL_IOMMU_DEBUGFS
> + bool "Export Intel IOMMU internals in Debugfs"
> + depends on INTEL_IOMMU && IOMMU_DEBUGFS
> + help
> + !!!WARNING!!!
> +
> + DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!
> +
> + Expose Intel IOMMU internals in Debugfs.
> +
> + This option is -NOT- intended for production environments, and should
> + only be enabled for debugging Intel IOMMU.
> +
> +config INTEL_IOMMU_SVM
> + bool "Support for Shared Virtual Memory with Intel IOMMU"
> + depends on INTEL_IOMMU && X86
> + 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
> + means of a Process Address Space ID (PASID).
> +
> +config INTEL_IOMMU_DEFAULT_ON
> + def_bool y
> + prompt "Enable Intel DMA Remapping Devices by default"
> + depends on INTEL_IOMMU
> + help
> + Selecting this option will enable a DMAR device at boot time if
> + one is found. If this option is not selected, DMAR support can
> + be enabled by passing intel_iommu=on to the kernel.
> +
> +config INTEL_IOMMU_BROKEN_GFX_WA
> + bool "Workaround broken graphics drivers (going away soon)"
> + depends on INTEL_IOMMU && BROKEN && X86
> + help
> + Current Graphics drivers tend to use physical address
> + for DMA and avoid using DMA APIs. Setting this config
> + option permits the IOMMU driver to set a unity map for
> + all the OS-visible memory. Hence the driver can continue
> + to use physical addresses for DMA, at least until this
> + option is removed in the 2.6.32 kernel.
> +
> +config INTEL_IOMMU_FLOPPY_WA
> + def_bool y
> + depends on INTEL_IOMMU && X86
> + help
> + Floppy disk drivers are known to bypass DMA API calls
> + thereby failing to work when IOMMU is enabled. This
> + 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.
> diff --git a/drivers/iommu/intel/Makefile b/drivers/iommu/intel/Makefile
> new file mode 100644
> index 000000000000..fb8e1e8c8029
> --- /dev/null
> +++ b/drivers/iommu/intel/Makefile
> @@ -0,0 +1,7 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_DMAR_TABLE) += dmar.o
> +obj-$(CONFIG_INTEL_IOMMU) += iommu.o pasid.o
> +obj-$(CONFIG_INTEL_IOMMU) += trace.o
> +obj-$(CONFIG_INTEL_IOMMU_DEBUGFS) += debugfs.o
> +obj-$(CONFIG_INTEL_IOMMU_SVM) += svm.o
> +obj-$(CONFIG_IRQ_REMAP) += irq_remapping.o
>
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