From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Dave Hansen <dave@sr71.net>, hpa@zytor.com
Cc: tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-ia64@vger.kernel.org, linux-mips@linux-mips.org,
qiaowei.ren@intel.com, dave.hansen@linux.intel.com
Subject: Re: [PATCH 05/11] x86, mpx: add MPX to disaabled features
Date: Fri, 14 Nov 2014 20:56:45 +0300 [thread overview]
Message-ID: <5466425D.1060100@cogentembedded.com> (raw)
In-Reply-To: <20141114151823.B358EAD2@viggo.jf.intel.com>
Hello.
On 11/14/2014 06:18 PM, Dave Hansen wrote:
> From: Dave Hansen <dave.hansen@linux.intel.com>
> 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 <dave.hansen@linux.intel.com>
> Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
> ---
> 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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next prev parent reply other threads:[~2014-11-14 17:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-14 15:18 [PATCH 00/11] [v11] Intel MPX support Dave Hansen
2014-11-14 15:18 ` [PATCH 01/11] x86, mpx: rename cfg_reg_u and status_reg Dave Hansen
2014-11-14 15:18 ` [PATCH 02/11] mpx: extend siginfo structure to include bound violation information Dave Hansen
2014-11-14 15:18 ` [PATCH 03/11] mips: sync struct siginfo with general version Dave Hansen
2014-11-14 15:18 ` [PATCH 04/11] ia64: " Dave Hansen
2014-11-14 15:18 ` [PATCH 05/11] x86, mpx: add MPX to disaabled features Dave Hansen
2014-11-14 17:56 ` Sergei Shtylyov [this message]
2014-11-14 18:38 ` Dave Hansen
2014-11-14 15:18 ` [PATCH 06/11] x86, mpx: introduce VM_MPX to indicate that a VMA is MPX specific Dave Hansen
2014-11-14 15:18 ` [PATCH 07/11] x86, mpx: add MPX-specific mmap interface Dave Hansen
2014-11-14 15:18 ` [PATCH 08/11] x86, mpx: [new code] decode MPX instruction to get bound violation information Dave Hansen
2014-11-14 15:18 ` [PATCH 09/11] x86, mpx: on-demand kernel allocation of bounds tables Dave Hansen
2014-11-14 16:47 ` Thomas Gleixner
2014-11-14 17:10 ` Dave Hansen
2014-11-14 15:18 ` [PATCH 10/11] x86, mpx: cleanup unused bound tables Dave Hansen
2014-11-14 15:18 ` [PATCH 11/11] x86, mpx: add documentation on Intel MPX Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2014-11-12 17:04 [PATCH 00/11] [v10] Intel MPX support Dave Hansen
2014-11-12 17:04 ` [PATCH 05/11] x86, mpx: add MPX to disaabled features Dave Hansen
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