Hello.
On 11/14/2014 06:18 PM, Dave Hansen wrote:
From: Dave Hansen <[email protected]>
This allows us to use cpu_feature_enabled(X86_FEATURE_MPX) as
both a runtime and compile-time check.
When CONFIG_X86_INTEL_MPX is disabled,
cpu_feature_enabled(X86_FEATURE_MPX) will evaluate at
compile-time to 0. If CONFIG_X86_INTEL_MPX=y, then the cpuid
flag will be checked at runtime.
Signed-off-by: Dave Hansen <[email protected]>
Signed-off-by: Qiaowei Ren <[email protected]>
---
b/arch/x86/include/asm/disabled-features.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff -puN
arch/x86/include/asm/disabled-features.h~mpx-v11-add-MPX-to-disaabled-features
arch/x86/include/asm/disabled-features.h
---
a/arch/x86/include/asm/disabled-features.h~mpx-v11-add-MPX-to-disaabled-features
2014-11-14 07:06:22.297610243 -0800
+++ b/arch/x86/include/asm/disabled-features.h 2014-11-14 07:06:22.300610378
-0800
[...]
@@ -34,6 +40,6 @@
#define DISABLED_MASK6 0
#define DISABLED_MASK7 0
#define DISABLED_MASK8 0
-#define DISABLED_MASK9 0
+#define DISABLED_MASK9 (DISABLE_MPX)
These parens are not really needed. Sorry to be a PITA and not saying this
before.
[...]
WBR, Sergei
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