UBUNTU: SAUCE: Synchronize MDS mitigations with upstream

[mirror_ubuntu-bionic-kernel.git] / Documentation / ABI / testing / sysfs-devices-system-cpu

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index bfd29bc8d37af1bbc4913deee9d941b1692bedda..a1fefb604c7f66d9763e77c2293def57b5d0d8d6 100644 (file)
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -380,6 +380,9 @@ What:               /sys/devices/system/cpu/vulnerabilities
                /sys/devices/system/cpu/vulnerabilities/meltdown
                /sys/devices/system/cpu/vulnerabilities/spectre_v1
                /sys/devices/system/cpu/vulnerabilities/spectre_v2
+               /sys/devices/system/cpu/vulnerabilities/spec_store_bypass
+               /sys/devices/system/cpu/vulnerabilities/l1tf
+               /sys/devices/system/cpu/vulnerabilities/mds
 Date:          January 2018
 Contact:       Linux kernel mailing list <linux-kernel@vger.kernel.org>
 Description:   Information about CPU vulnerabilities
@@ -391,3 +394,25 @@ Description:       Information about CPU vulnerabilities
                "Not affected"    CPU is not affected by the vulnerability
                "Vulnerable"      CPU is affected and no mitigation in effect
                "Mitigation: $M"  CPU is affected and mitigation $M is in effect
+
+               See also: Documentation/admin-guide/hw-vuln/index.rst
+
+What:          /sys/devices/system/cpu/smt
+               /sys/devices/system/cpu/smt/active
+               /sys/devices/system/cpu/smt/control
+Date:          June 2018
+Contact:       Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description:   Control Symetric Multi Threading (SMT)
+
+               active:  Tells whether SMT is active (enabled and siblings online)
+
+               control: Read/write interface to control SMT. Possible
+                        values:
+
+                        "on"           SMT is enabled
+                        "off"          SMT is disabled
+                        "forceoff"     SMT is force disabled. Cannot be changed.
+                        "notsupported" SMT is not supported by the CPU
+
+                        If control status is "forceoff" or "notsupported" writes
+                        are rejected.