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authorBorislav Petkov <bp@suse.de>2018-05-08 15:43:45 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-05-22 18:54:04 +0200
commit8dc742f930ccbb6b41d538bb35b81693cd8bad43 (patch)
treed18426d579b40024abf6c782be09bee3a95d4d76
parent43c47eb2a274fa12029ac5485ae4360048a398af (diff)
Documentation/spec_ctrl: Do some minor cleanups
commit dd0792699c4058e63c0715d9a7c2d40226fcdddc upstream Fix some typos, improve formulations, end sentences with a fullstop. Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--Documentation/userspace-api/spec_ctrl.rst24
1 files changed, 12 insertions, 12 deletions
diff --git a/Documentation/userspace-api/spec_ctrl.rst b/Documentation/userspace-api/spec_ctrl.rst
index 1b3690d30943..32f3d55c54b7 100644
--- a/Documentation/userspace-api/spec_ctrl.rst
+++ b/Documentation/userspace-api/spec_ctrl.rst
@@ -2,13 +2,13 @@
Speculation Control
===================
-Quite some CPUs have speculation related misfeatures which are in fact
-vulnerabilites causing data leaks in various forms even accross privilege
-domains.
+Quite some CPUs have speculation-related misfeatures which are in
+fact vulnerabilities causing data leaks in various forms even across
+privilege domains.
The kernel provides mitigation for such vulnerabilities in various
-forms. Some of these mitigations are compile time configurable and some on
-the kernel command line.
+forms. Some of these mitigations are compile-time configurable and some
+can be supplied on the kernel command line.
There is also a class of mitigations which are very expensive, but they can
be restricted to a certain set of processes or tasks in controlled
@@ -32,18 +32,18 @@ the following meaning:
Bit Define Description
==== ===================== ===================================================
0 PR_SPEC_PRCTL Mitigation can be controlled per task by
- PR_SET_SPECULATION_CTRL
+ PR_SET_SPECULATION_CTRL.
1 PR_SPEC_ENABLE The speculation feature is enabled, mitigation is
- disabled
+ disabled.
2 PR_SPEC_DISABLE The speculation feature is disabled, mitigation is
- enabled
+ enabled.
3 PR_SPEC_FORCE_DISABLE Same as PR_SPEC_DISABLE, but cannot be undone. A
subsequent prctl(..., PR_SPEC_ENABLE) will fail.
==== ===================== ===================================================
If all bits are 0 the CPU is not affected by the speculation misfeature.
-If PR_SPEC_PRCTL is set, then the per task control of the mitigation is
+If PR_SPEC_PRCTL is set, then the per-task control of the mitigation is
available. If not set, prctl(PR_SET_SPECULATION_CTRL) for the speculation
misfeature will fail.
@@ -61,9 +61,9 @@ Common error codes
Value Meaning
======= =================================================================
EINVAL The prctl is not implemented by the architecture or unused
- prctl(2) arguments are not 0
+ prctl(2) arguments are not 0.
-ENODEV arg2 is selecting a not supported speculation misfeature
+ENODEV arg2 is selecting a not supported speculation misfeature.
======= =================================================================
PR_SET_SPECULATION_CTRL error codes
@@ -74,7 +74,7 @@ Value Meaning
0 Success
ERANGE arg3 is incorrect, i.e. it's neither PR_SPEC_ENABLE nor
- PR_SPEC_DISABLE nor PR_SPEC_FORCE_DISABLE
+ PR_SPEC_DISABLE nor PR_SPEC_FORCE_DISABLE.
ENXIO Control of the selected speculation misfeature is not possible.
See PR_GET_SPECULATION_CTRL.