0e71bcdcf1
The kernel v6.14 added 'swfilt' to support privilege filtering in software so that IBS can be used by regular users. Add a test case in x86 to verify the behavior. $ sudo perf test -vv 'IBS software filter' 113: AMD IBS software filtering: --- start --- test child forked, pid 178826 check availability of IBS swfilt run perf record with modifier and swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 0 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] check number of samples with swfilt [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.037 MB - ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.041 MB - ] ---- end(0) ---- 113: AMD IBS software filtering : Ok Reviewed-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> # On a 9950x3d Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250524002754.1266681-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.