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0e3cd31f6e
The setting for non-contiguous 1s support in Intel CAT is hardcoded to false. On these systems, writing non-contiguous 1s into the schemata file will fail before resctrl passes the value to the hardware. In Intel CAT CPUID.0x10.1:ECX[3] and CPUID.0x10.2:ECX[3] stopped being reserved and now carry information about non-contiguous 1s value support for L3 and L2 cache respectively. The CAT capacity bitmask (CBM) supports a non-contiguous 1s value if the bit is set. The exception are Haswell systems where non-contiguous 1s value support needs to stay disabled since they can't make use of CPUID for Cache allocation. Originally-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Peter Newman <peternewman@google.com> Reviewed-by: Reinette Chatre <reinette.chatre@intel.com> Reviewed-by: Babu Moger <babu.moger@amd.com> Tested-by: Peter Newman <peternewman@google.com> Link: https://lore.kernel.org/r/1849b487256fe4de40b30f88450cba3d9abc9171.1696934091.git.maciej.wieczor-retman@intel.com |
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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.