Commit ee2636b8 authored by Sohil Mehta's avatar Sohil Mehta Committed by Joerg Roedel
Browse files

iommu/vt-d: Enable base Intel IOMMU debugfs support 



Add a new config option CONFIG_INTEL_IOMMU_DEBUGFS and do the base
enabling for Intel IOMMU debugfs.

Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Co-Developed-by: default avatarGayatri Kammela <gayatri.kammela@intel.com>
Signed-off-by: default avatarGayatri Kammela <gayatri.kammela@intel.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarSohil Mehta <sohil.mehta@intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 4a2d80db

drivers/iommu/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -186,6 +186,19 @@ config INTEL_IOMMU 
	  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

drivers/iommu/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ obj-$(CONFIG_ARM_SMMU) += arm-smmu.o 
obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o

obj-$(CONFIG_DMAR_TABLE) += dmar.o

obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o intel-pasid.o

obj-$(CONFIG_INTEL_IOMMU_DEBUGFS) += intel-iommu-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

drivers/iommu/intel-iommu-debugfs.c

0 → 100644
+20 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright © 2018 Intel Corporation.

 *

 * Authors: Gayatri Kammela <gayatri.kammela@intel.com>

 *	    Sohil Mehta <sohil.mehta@intel.com>

 *	    Jacob Pan <jacob.jun.pan@linux.intel.com>

 */



#include <linux/debugfs.h>

#include <linux/dmar.h>

#include <linux/intel-iommu.h>

#include <linux/pci.h>



#include <asm/irq_remapping.h>



void __init intel_iommu_debugfs_init(void)

{

	debugfs_create_dir("intel", iommu_debugfs_dir);

}

drivers/iommu/intel-iommu.c

+1 −0
Original line number Diff line number Diff line
@@ -4837,6 +4837,7 @@ int __init intel_iommu_init(void) 
	cpuhp_setup_state(CPUHP_IOMMU_INTEL_DEAD, "iommu/intel:dead", NULL,

			  intel_iommu_cpu_dead);

	intel_iommu_enabled = 1;

	intel_iommu_debugfs_init();



	return 0;

include/linux/intel-iommu.h

+6 −0
Original line number Diff line number Diff line
@@ -621,6 +621,12 @@ extern int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_ 
extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);

#endif



#ifdef CONFIG_INTEL_IOMMU_DEBUGFS

void intel_iommu_debugfs_init(void);

#else

static inline void intel_iommu_debugfs_init(void) {}

#endif /* CONFIG_INTEL_IOMMU_DEBUGFS */



extern const struct attribute_group *intel_iommu_groups[];

bool context_present(struct context_entry *context);

struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,

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