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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140620161740.BFB00798@viggo.jf.intel.com \
--to=dave@sr71.net \
--cc=bp@alien8.de \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.