diff options
| author | Alexey Budankov <alexey.budankov@linux.intel.com> | 2020-04-02 11:54:39 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-04-16 12:19:12 -0300 |
| commit | 025b16f81dd7f51f29d0109399d669438c63b6ce (patch) | |
| tree | 0bbeccd7f3c18195eccb6f8ed6fb4d4ffecb4be7 /Documentation | |
| parent | 902a8dcc5ba6c5dc3332e8806b01be2f0f7ef2e4 (diff) | |
doc/admin-guide: update kernel.rst with CAP_PERFMON information
Update the kernel.rst documentation file with the information related to
usage of CAP_PERFMON capability to secure performance monitoring and
observability operations in system.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Igor Lubashev <ilubashe@akamai.com>
Cc: James Morris <jmorris@namei.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: intel-gfx@lists.freedesktop.org
Cc: linux-doc@vger.kernel.org
Cc: linux-man@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Cc: selinux@vger.kernel.org
Link: http://lore.kernel.org/lkml/84c32383-14a2-fa35-16b6-f9e59bd37240@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 39c95c0e13d3..7e4c28dfc9ca 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -730,7 +730,13 @@ perf_event_paranoid =================== Controls use of the performance events system by unprivileged -users (without CAP_SYS_ADMIN). The default value is 2. +users (without CAP_PERFMON). The default value is 2. + +For backward compatibility reasons access to system performance +monitoring and observability remains open for CAP_SYS_ADMIN +privileged processes but CAP_SYS_ADMIN usage for secure system +performance monitoring and observability operations is discouraged +with respect to CAP_PERFMON use cases. === ================================================================== -1 Allow use of (almost) all events by all users. @@ -739,13 +745,13 @@ users (without CAP_SYS_ADMIN). The default value is 2. ``CAP_IPC_LOCK``. >=0 Disallow ftrace function tracepoint by users without - ``CAP_SYS_ADMIN``. + ``CAP_PERFMON``. - Disallow raw tracepoint access by users without ``CAP_SYS_ADMIN``. + Disallow raw tracepoint access by users without ``CAP_PERFMON``. ->=1 Disallow CPU event access by users without ``CAP_SYS_ADMIN``. +>=1 Disallow CPU event access by users without ``CAP_PERFMON``. ->=2 Disallow kernel profiling by users without ``CAP_SYS_ADMIN``. +>=2 Disallow kernel profiling by users without ``CAP_PERFMON``. === ================================================================== |