From: Qiaowei Ren <qiaowei.ren@intel.com>
To: "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@intel.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Qiaowei Ren <qiaowei.ren@intel.com>
Subject: [PATCH v6 03/10] x86, mpx: add macro cpu_has_mpx
Date: Wed, 18 Jun 2014 17:44:09 +0800 [thread overview]
Message-ID: <1403084656-27284-4-git-send-email-qiaowei.ren@intel.com> (raw)
In-Reply-To: <1403084656-27284-1-git-send-email-qiaowei.ren@intel.com>
In order to do performance optimization, this patch adds macro
cpu_has_mpx which will directly return 0 when MPX is not supported
by kernel.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
---
arch/x86/include/asm/cpufeature.h | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index e265ff9..f302d08 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -339,6 +339,12 @@ extern const char * const x86_power_flags[32];
#define cpu_has_eager_fpu boot_cpu_has(X86_FEATURE_EAGER_FPU)
#define cpu_has_topoext boot_cpu_has(X86_FEATURE_TOPOEXT)
+#ifdef CONFIG_X86_INTEL_MPX
+#define cpu_has_mpx boot_cpu_has(X86_FEATURE_MPX)
+#else
+#define cpu_has_mpx 0
+#endif /* CONFIG_X86_INTEL_MPX */
+
#ifdef CONFIG_X86_64
#undef cpu_has_vme
--
1.7.1
next prev parent reply other threads:[~2014-06-18 9:51 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-18 9:44 [PATCH v6 00/10] Intel MPX support Qiaowei Ren
2014-06-18 9:44 ` [PATCH v6 01/10] x86, mpx: introduce VM_MPX to indicate that a VMA is MPX specific Qiaowei Ren
2014-06-18 9:44 ` [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface Qiaowei Ren
2014-06-23 19:49 ` Andy Lutomirski
2014-06-23 20:03 ` Dave Hansen
2014-06-23 20:06 ` Andy Lutomirski
2014-06-23 20:28 ` Dave Hansen
2014-06-23 21:04 ` Andy Lutomirski
2014-06-24 5:53 ` Ren, Qiaowei
2014-06-24 23:55 ` Andy Lutomirski
2014-06-25 1:40 ` Ren, Qiaowei
2014-06-25 21:04 ` Andy Lutomirski
2014-06-25 21:05 ` Andy Lutomirski
2014-06-25 21:45 ` Dave Hansen
2014-06-26 22:19 ` Andy Lutomirski
2014-06-26 22:58 ` Dave Hansen
2014-06-26 23:15 ` Andy Lutomirski
2014-06-27 0:19 ` Dave Hansen
2014-06-27 0:26 ` Andy Lutomirski
2014-06-27 17:34 ` Dave Hansen
2014-06-27 17:42 ` Dave Hansen
2014-06-27 18:57 ` Andy Lutomirski
2014-06-25 21:43 ` Dave Hansen
2014-06-24 2:53 ` Ren, Qiaowei
2014-06-18 9:44 ` Qiaowei Ren [this message]
2014-06-18 9:57 ` [PATCH v6 03/10] x86, mpx: add macro cpu_has_mpx Borislav Petkov
2014-06-18 14:35 ` Dave Hansen
2014-06-18 14:44 ` Borislav Petkov
2014-06-18 14:58 ` Dave Hansen
2014-06-18 15:25 ` Borislav Petkov
2014-06-18 16:17 ` Dave Hansen
2014-06-18 15:00 ` H. Peter Anvin
2014-06-18 15:27 ` Borislav Petkov
2014-06-18 14:59 ` H. Peter Anvin
2014-06-18 16:25 ` Dave Hansen
2014-06-18 17:21 ` Borislav Petkov
2014-06-19 18:02 ` H. Peter Anvin
2014-06-19 18:50 ` Dave Hansen
2014-06-20 3:28 ` H. Peter Anvin
2014-06-18 9:44 ` [PATCH v6 04/10] x86, mpx: hook #BR exception handler to allocate bound tables Qiaowei Ren
2014-06-23 19:54 ` Andy Lutomirski
2014-06-24 1:53 ` Ren, Qiaowei
2014-07-11 16:23 ` Dave Hansen
2014-06-18 9:44 ` [PATCH v6 05/10] x86, mpx: extend siginfo structure to include bound violation information Qiaowei Ren
2014-06-18 9:44 ` [PATCH v6 06/10] mips: sync struct siginfo with general version Qiaowei Ren
2014-06-18 9:44 ` [PATCH v6 07/10] x86, mpx: decode MPX instruction to get bound violation information Qiaowei Ren
2014-06-18 10:07 ` Borislav Petkov
2014-06-19 1:13 ` Ren, Qiaowei
2014-06-19 6:28 ` Borislav Petkov
2014-06-19 6:53 ` Ren, Qiaowei
2014-06-19 17:04 ` Dave Hansen
2014-06-19 17:32 ` H. Peter Anvin
2014-06-20 3:21 ` Ren, Qiaowei
2014-06-18 9:44 ` [PATCH v6 08/10] x86, mpx: add prctl commands PR_MPX_REGISTER, PR_MPX_UNREGISTER Qiaowei Ren
2014-06-19 20:58 ` Dave Hansen
2014-06-23 20:00 ` Andy Lutomirski
2014-06-23 20:09 ` Dave Hansen
2014-06-23 22:00 ` Andy Lutomirski
2014-06-23 23:42 ` Dave Hansen
2014-06-24 0:01 ` Andy Lutomirski
2014-06-24 0:10 ` Dave Hansen
2014-06-18 9:44 ` [PATCH v6 09/10] x86, mpx: cleanup unused bound tables Qiaowei Ren
2014-06-23 19:57 ` Andy Lutomirski
2014-06-18 9:44 ` [PATCH v6 10/10] x86, mpx: add documentation on Intel MPX Qiaowei Ren
2014-06-18 14:41 ` [PATCH v6 00/10] Intel MPX support Dave Hansen
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