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4 Commits

Author SHA1 Message Date
Sohil Mehta
18f99c9b9d iommu/vt-d: Add debugfs support to show context internals 
Export Intel IOMMU DMA remapping internal states, such as root and
context table entries in debugfs.

Example of such dump in Kabylake:
/sys/kernel/debug/iommu/intel/dmar_translation_struct

IOMMU dmar0: Root Table Address:45699c000
Root Table Entries:
 Bus: 0 H: 0 L: 45699f001
 Context Table Entries for Bus: 0
  Entry B:D.F   High    Low
  16    00:02.0 102     45699e005

IOMMU dmar1: Root Table Address:45699d000
Root Table Entries:
 Bus: 0 H: 0 L: 45644f001
 Context Table Entries for Bus: 0
  Entry B:D.F   High    Low
  160   00:14.0 102     45644e001
  184   00:17.0 302     456310001
  248   00:1f.0 202     4564bf001

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>
 2018-09-25 14:33:44 +02:00
Sohil Mehta
a6d268c619 iommu/vt-d: Add debugfs support for Interrupt remapping 
Debugfs extension for Intel IOMMU to dump Interrupt remapping table
entries for Interrupt remapping and Interrupt posting.

The file /sys/kernel/debug/iommu/intel/ir_translation_struct provides
detailed information, such as Index, Source Id, Destination Id, Vector
and the IRTE values for entries with the present bit set, in the format
shown.

Remapped Interrupt supported on IOMMU: dmar1
 IR table address:85e500000
 Entry SrcID   DstID    Vct IRTE_high           IRTE_low
 24    01:00.0 00000001 24  0000000000040100    000000010024000d
 25    01:00.0 00000004 22  0000000000040100    000000040022000d

Posted Interrupt supported on IOMMU: dmar5
 IR table address:85ec00000
 Entry SrcID   PDA_high PDA_low  Vct IRTE_high          IRTE_low
 4     43:00.0 0000000f ff765980 41  0000000f00044300   ff76598000418001
 5     43:00.0 0000000f ff765980 51  0000000f00044300   ff76598000518001

Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Ashok Raj <ashok.raj@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>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
 2018-09-25 14:33:44 +02:00
Gayatri Kammela
6825d3ea6c iommu/vt-d: Add debugfs support to show register contents 
Add Intel IOMMU debugfs extension to dump all the register contents for
each IOMMU device.

Example:
root@OTC-KBLH-01:~# cat /sys/kernel/debug/iommu/intel/iommu_regset
IOMMU: dmar0 Register Base Address: fed90000
Name            Offset          Contents
VER             0x00            0x0000000000000010
CAP             0x08            0x01c0000c40660462
ECAP            0x10            0x0000000000f0101a
GCMD            0x18            0x0000000000000000
GSTS            0x1c            0x00000000c7000000
RTADDR          0x20            0x00000004071d3800
CCMD            0x28            0x0800000000000000
FSTS            0x34            0x0000000000000000
FECTL           0x38            0x0000000000000000
FEDATA          0x3c            0xfee0100400004021

Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Ashok Raj <ashok.raj@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>
Co-Developed-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Sohil Mehta <sohil.mehta@intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
 2018-09-25 14:33:44 +02:00
Sohil Mehta
ee2636b867 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>
 2018-09-25 14:33:43 +02:00