Add the PR_SPEC_DISABLE_NOEXEC mode added in Linux 5.1
for the PR_SPEC_STORE_BYPASS "misfeature" of
PR_SET_SPECULATION_CTRL and PR_GET_SPECULATION_CTRL.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Thomas Gleixner <redacted>
---
  man2/prctl.2 | 22 ++++++++++++++++++++--
  1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/man2/prctl.2 b/man2/prctl.2
index b6fb51c..cab9915 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2

@@ -1187,6 +1187,12 @@ The speculation feature is disabled, mitigation is enabled.
  Same as
  .B PR_SPEC_DISABLE
  but cannot be undone.
+.TP
+.BR PR_SPEC_DISABLE_NOEXEC " (since Linux 5.1)"
+Same as
+.BR PR_SPEC_DISABLE ,
+but but the state will be cleared on
+.BR execve (2).
  .RE
  .IP
  If all bits are 0,

@@ -1251,6 +1257,17 @@ with the same value for
  .I arg2
  will fail with the error
  .BR EPERM .
+.\" commit 71368af9027f18fe5d1c6f372cfdff7e4bde8b48
+.TP
+.BR PR_SPEC_DISABLE_NOEXEC " (since Linux 5.1)"
+Same as
+.BR PR_SPEC_DISABLE ,
+but but the state will be cleared on
+.BR execve (2).
+Currently only supported for
+.I arg2
+equal to
+.B PR_SPEC_STORE_BYPASS.
  .RE
  .IP
  Any unsupported value in

@@ -1899,11 +1916,12 @@ was
  .BR PR_SET_SPECULATION_CTRL
  and
  .IR arg3
-is neither
+is not
  .BR PR_SPEC_ENABLE ,
  .BR PR_SPEC_DISABLE ,
+.BR PR_SPEC_FORCE_DISABLE ,
  nor
-.BR PR_SPEC_FORCE_DISABLE .
+.BR PR_SPEC_DISABLE_NOEXEC .
  .SH VERSIONS
  The
  .BR prctl ()