[linux-yocto] [kernel-cache][PATCH] features: add Intel Memory Protection Extensions

Mikko Ylinen mikko.ylinen at linux.intel.com
Thu Mar 9 23:44:28 PST 2017


This commit adds a kernel feature to have the kernel support
for Intel Memory Protection Extensions (MPX).

A quote from kernel arch/x86/Kconfig:

"MPX provides hardware features that can be used in conjuction
with compiler-instrumented code to check memory references. It
is designed to detect buffer overflow or underflow bugs."

Intel MPX is available, e.g., on Skylake and on Goldmont (e.g.,
Intel 570x).

Signed-off-by: Mikko Ylinen <mikko.ylinen at linux.intel.com>
---
 features/mpx/mpx.cfg | 1 +
 features/mpx/mpx.scc | 4 ++++
 2 files changed, 5 insertions(+)
 create mode 100644 features/mpx/mpx.cfg
 create mode 100644 features/mpx/mpx.scc

diff --git a/features/mpx/mpx.cfg b/features/mpx/mpx.cfg
new file mode 100644
index 00000000..ed1a6dae
--- /dev/null
+++ b/features/mpx/mpx.cfg
@@ -0,0 +1 @@
+CONFIG_X86_INTEL_MPX=y
diff --git a/features/mpx/mpx.scc b/features/mpx/mpx.scc
new file mode 100644
index 00000000..1c9cc2a1
--- /dev/null
+++ b/features/mpx/mpx.scc
@@ -0,0 +1,4 @@
+define KFEATURE_DESCRIPTION "Intel MPX (Memory Protection Extensions)"
+define KFEATURE_COMPATIBILITY arch
+
+kconf hardware mpx.cfg
-- 
2.11.0



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