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H_HTM (Hardware Trace Macro) hypervisor call is an HCALL to export data from Hardware Trace Macro (HTM) function. The debugfs interface to export the HTM function data in an lpar currently supports only dumping of HTM data in an lpar. To add support for setup, configuration and control of HTM function via debugfs interface, update the hcall wrapper function. Rename and update htm_get_dump_hardware to htm_hcall_wrapper() so that it can be used for other HTM operations as well. Additionally include parameter "htm_op". Update htmdump module to check the return code of hcall in a separate function so that it can be reused for other option too. Add check to disable the interface in guest environment. Signed-off-by: Athira Rajeev <atrajeev@linux.ibm.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20250420180844.53128-2-atrajeev@linux.ibm.com
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.