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| author |   Sohil Mehta <sohil.mehta@intel.com> | 2018-09-11 17:11:38 -0700 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2018-09-25 14:33:43 +0200 |
| commit | ee2636b8670b1ab2a02a65923a9bef59e9199c37 (patch) | |
| tree | 340b641db7e72cba2cf7c7746f6a1f529aa1a9b5 /drivers | |
| parent | iommu/vt-d: Update register definitions to VT-d 3.0 specification (diff) | |
| download | linux-dev-ee2636b8670b1ab2a02a65923a9bef59e9199c37.tar.xz linux-dev-ee2636b8670b1ab2a02a65923a9bef59e9199c37.zip | |
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: Gayatri Kammela <gayatri.kammela@intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/iommu/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iommu/intel-iommu-debugfs.c | 20 | ||||
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 1 |
4 files changed, 35 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index c60395b7470f..51ba19c8847b 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -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 diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index ab5eba6edf82..a158a68c8ea8 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -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 diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c new file mode 100644 index 000000000000..33e0a6c12d92 --- /dev/null +++ b/drivers/iommu/intel-iommu-debugfs.c @@ -0,0 +1,20 @@ +// 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); +} diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index b5868c757995..b9cf7c8c1616 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -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; |