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Presently, "/sys/kernel/debug/iommu/intel/dmar_translation_struct" file dumps DMAR tables in the below format IOMMU dmar2: Root Table Address:4362cc000 Root Table Entries: Bus: 0 H: 0 L: 4362f0001 Context Table Entries for Bus: 0 Entry B:D.F High Low 160 00:14.0 102 4362ef001 184 00:17.0 302 435ec4001 248 00:1f.0 202 436300001 This format has few short comings like 1. When extended for dumping scalable mode DMAR table it will quickly be very clumsy, making it unreadable. 2. It has information like the Bus number and Entry which are basically part of B:D.F, hence are a repetition and are not so useful. So, change it to a new format which could be easily extended to dump scalable mode DMAR table. The new format looks as below: IOMMU dmar2: Root Table Address: 0x436f7d000 B.D.F Root_entry Context_entry 00:14.0 0x0000000000000000:0x0000000436fbd001 0x0000000000000102:0x0000000436fbc001 00:17.0 0x0000000000000000:0x0000000436fbd001 0x0000000000000302:0x0000000436af4001 00:1f.0 0x0000000000000000:0x0000000436fbd001 0x0000000000000202:0x0000000436fcd001 Cc: Joerg Roedel <joro@8bytes.org> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Lu Baolu <baolu.lu@linux.intel.com> Cc: Sohil Mehta <sohil.mehta@intel.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.