From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: bp@alien8.de, x86@kernel.org, hpa@zytor.com, Dave Hansen <dave@sr71.net>
Subject: [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit
Date: Fri, 20 Jun 2014 09:17:40 -0700 [thread overview]
Message-ID: <20140620161740.BFB00798@viggo.jf.intel.com> (raw)
In-Reply-To: <20140620161736.D6AC16FD@viggo.jf.intel.com>
Today, we assume that all 64-bit cpus have X86_FEATURE_MP. It
should be in the REQUIRED_MASK so that we do not need the #undef
trick for it.
---
b/arch/x86/include/asm/cpufeature.h | 3 ---
b/arch/x86/include/asm/required-features.h | 4 +++-
2 files changed, 3 insertions(+), 4 deletions(-)
diff -puN arch/x86/include/asm/cpufeature.h~x86-make-mp-required_feature arch/x86/include/asm/cpufeature.h
--- a/arch/x86/include/asm/cpufeature.h~x86-make-mp-required_feature 2014-06-20 09:16:10.180396969 -0700
+++ b/arch/x86/include/asm/cpufeature.h 2014-06-20 09:16:10.185397194 -0700
@@ -362,9 +362,6 @@ extern const char * const x86_power_flag
#undef cpu_has_pae
#define cpu_has_pae ___BUG___
-#undef cpu_has_mp
-#define cpu_has_mp 1
-
#endif /* CONFIG_X86_64 */
#if __GNUC__ >= 4
diff -puN arch/x86/include/asm/required-features.h~x86-make-mp-required_feature arch/x86/include/asm/required-features.h
--- a/arch/x86/include/asm/required-features.h~x86-make-mp-required_feature 2014-06-20 09:16:10.182397059 -0700
+++ b/arch/x86/include/asm/required-features.h 2014-06-20 09:16:10.186397240 -0700
@@ -67,6 +67,7 @@
#define NEED_XMM (1<<(X86_FEATURE_XMM & 31))
#define NEED_XMM2 (1<<(X86_FEATURE_XMM2 & 31))
#define NEED_LM (1<<(X86_FEATURE_LM & 31))
+#define NEED_MP (1<<(X86_FEATURE_MP & 31))
#else
#define NEED_PSE 0
#define NEED_MSR 0
@@ -75,6 +76,7 @@
#define NEED_XMM 0
#define NEED_XMM2 0
#define NEED_LM 0
+#define NEED_MP 0
#endif
#define REQUIRED_MASK0 (NEED_FPU|NEED_PSE|NEED_MSR|NEED_PAE|\
@@ -82,7 +84,7 @@
NEED_XMM|NEED_XMM2)
#define SSE_MASK (NEED_XMM|NEED_XMM2)
-#define REQUIRED_MASK1 (NEED_LM|NEED_3DNOW)
+#define REQUIRED_MASK1 (NEED_LM|NEED_3DNOW|NEED_MP)
#define REQUIRED_MASK2 0
#define REQUIRED_MASK3 (NEED_NOPL)
_
next prev parent reply other threads:[~2014-06-20 16:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-20 16:17 [RFC][PATCH 1/3] x86: introduce disabled-features Dave Hansen
2014-06-20 16:17 ` [RFC][PATCH 2/3] x86: add more disabled features Dave Hansen
2014-06-20 16:17 ` Dave Hansen [this message]
2014-06-20 16:23 ` [RFC][PATCH 3/3] x86: make MP a required-feature on 64-bit H. Peter Anvin
2014-06-20 16:30 ` Dave Hansen
2014-06-20 16:37 ` H. Peter Anvin
2014-06-20 17:43 ` Borislav Petkov
2014-06-20 17:47 ` H. Peter Anvin
2014-06-20 18:05 ` Borislav Petkov
2014-06-20 18:16 ` Dave Jones
2014-06-20 18:48 ` Borislav Petkov
2014-06-20 18:54 ` H. Peter Anvin
2014-06-20 20:00 ` Borislav Petkov
2014-06-20 20:22 ` H. Peter Anvin
2014-06-20 20:35 ` Borislav Petkov
2014-06-20 17:50 ` H. Peter Anvin
2014-06-20 18:15 ` Borislav Petkov
2014-06-20 18:57 ` H. Peter Anvin
2014-06-20 20:37 ` Borislav Petkov
2014-06-23 6:11 ` Andi Kleen
2014-06-20 16:20 ` [RFC][PATCH 1/3] x86: introduce disabled-features H. Peter Anvin
2014-06-20 17:20 ` Dave Hansen
2014-06-20 20:40 ` Dave Hansen
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