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Date:   Fri, 12 Jun 2020 16:10:59 -0700
From:   Jerry Snitselaar <jsnitsel@...hat.com>
To:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     Joerg Roedel <joro@...tes.org>, Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH 1/2] iommu/vt-d: Move Kconfig and Makefile bits down into intel directory

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>
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
-- 
2.27.0

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