diff options
| -rw-r--r-- | Documentation/userspace-api/spec_ctrl.rst | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/userspace-api/spec_ctrl.rst b/Documentation/userspace-api/spec_ctrl.rst index ca89151fc0a8..61fe020b23a2 100644 --- a/Documentation/userspace-api/spec_ctrl.rst +++ b/Documentation/userspace-api/spec_ctrl.rst @@ -81,11 +81,15 @@ Value Meaning ERANGE arg3 is incorrect, i.e. it's neither PR_SPEC_ENABLE nor PR_SPEC_DISABLE nor PR_SPEC_FORCE_DISABLE. -ENXIO Control of the selected speculation misfeature is not possible. - See PR_GET_SPECULATION_CTRL. +ENXIO For PR_SPEC_STORE_BYPASS: control of the selected speculation misfeature + is not possible via prctl, because of the system's boot configuration. + +EPERM Speculation was disabled with PR_SPEC_FORCE_DISABLE and caller tried to + enable it again. + +EPERM For PR_SPEC_L1D_FLUSH and PR_SPEC_INDIRECT_BRANCH: control of the + mitigation is not possible because of the system's boot configuration. -EPERM Speculation was disabled with PR_SPEC_FORCE_DISABLE and caller - tried to enable it again. ======= ================================================================= Speculation misfeature controls |