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Documentation: Add section about CPU vulnerabilities for Spectre

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Add documentation for Spectre vulnerability and the mitigation mechanisms:

- Explain the problem and risks
- Document the mitigation mechanisms
- Document the command line controls
- Document the sysfs files

Co-developed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Co-developed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Tim Chen
2019-06-20 16:10:50 -07:00
committed by Jonathan Corbet
parent 163ede97a9
commit 6e88559470
3 changed files with 700 additions and 0 deletions
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1
Documentation/admin-guide/hw-vuln/index.rst
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@@ -9,5 +9,6 @@ are configurable at compile, boot or run time.
.. toctree::
:maxdepth: 1
spectre
l1tf
mds

697
Documentation/admin-guide/hw-vuln/spectre.rst Normal file
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2
Documentation/userspace-api/spec_ctrl.rst
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@@ -49,6 +49,8 @@ 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.
.. _set_spec_ctrl:
PR_SET_SPECULATION_CTRL
-----------------------