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AMD systems optionally support MCA thresholding which provides the ability for hardware to send an interrupt when a set error threshold is reached. This feature counts errors of all severities, but it is commonly used to report correctable errors with an interrupt rather than polling. Scalable MCA systems allow the platform to take control of this feature. In this case, the OS will not see the feature configuration and control bits in the MCA_MISC* registers. The OS will not receive the MCA thresholding interrupt, and it will need to poll for correctable errors. A "corrected error interrupt" will be available on Scalable MCA systems. This will be used in the same configuration where the platform controls MCA thresholding. However, the platform will now be able to send the MCA thresholding interrupt to the OS. Check for, and enable, this feature during per-CPU SMCA init. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Tested-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/20251104-wip-mca-updates-v8-0-66c8eacf67b9@amd.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 reStructuredText 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.