linux-kernel - [095/103] x86: detect scattered cpuid features earlier

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Message-Id: <20101022185235.848764546@clark.site>
Date:	Fri, 22 Oct 2010 11:52:09 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: [095/103] x86: detect scattered cpuid features earlier

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jacob Pan <jacob.jun.pan@...ux.intel.com>

commit 1dedefd1a066a795a87afca9c0236e1a94de9bf6 upstream.

Some extra CPU features such as ARAT is needed in early boot so
that x86_init function pointers can be set up properly.
http://lkml.org/lkml/2010/5/18/519
At start_kernel() level, this patch moves init_scattered_cpuid_features()
from check_bugs() to setup_arch() -> early_cpu_init() which is earlier than
platform specific x86_init layer setup. Suggested by HPA.

Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
LKML-Reference: <1274295685-6774-2-git-send-email-jacob.jun.pan@...ux.intel.com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/x86/kernel/cpu/common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -576,6 +576,7 @@ void __cpuinit get_cpu_cap(struct cpuinf
 	if (c->extended_cpuid_level >= 0x80000007)
 		c->x86_power = cpuid_edx(0x80000007);

+	init_scattered_cpuid_features(c);
 }

 static void __cpuinit identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
@@ -731,7 +732,6 @@ static void __cpuinit generic_identify(s

 	get_model_name(c); /* Default name */

-	init_scattered_cpuid_features(c);
 	detect_nopl(c);
 }

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