Based on the implementation in kernel/bpf/syscall.c,
kernel/bpf/trampoline.c, include/linux/filter.h, and the documentation
in bpftool-prog.rst.
The section style doesn't match the surrounding sections; it matches
the style of the reworked kernel.rst queued up in docs-next.
Signed-off-by: Stephen Kitt <steve@xxxxxxx>
---
Notes:
Changes since v2:
- fixed "will disabled" typo.
Changes since v1:
- rebased on bpf-next instead of docs-next.
Documentation/admin-guide/sysctl/kernel.rst | 24 +++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index def074807cee..9e1417628572 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -174,6 +174,20 @@ See the type_of_loader and ext_loader_ver fields in
Documentation/x86/boot.rst for additional information.
+bpf_stats_enabled
+=================
+
+Controls whether the kernel should collect statistics on BPF programs
+(total time spent running, number of times run...). Enabling
+statistics causes a slight reduction in performance on each program
+run. The statistics can be seen using ``bpftool``.
+
+= ===================================
+0 Don't collect statistics (default).
+1 Collect statistics.
+= ===================================
+
+
cap_last_cap:
=============
@@ -1123,6 +1137,16 @@ NMI switch that most IA32 servers have fires unknown NMI up, for
example. If a system hangs up, try pressing the NMI switch.
+unprivileged_bpf_disabled
+=========================
+
+Writing 1 to this entry will disable unprivileged calls to ``bpf()``;
+once disabled, calling ``bpf()`` without ``CAP_SYS_ADMIN`` will return
+``-EPERM``.
+
+Once set, this can't be cleared.
+
+
watchdog:
=========
base-commit: 3e7c67d90e3ed2f34fce42699f11b150dd1d3999
--
2.20.1
