Commit 1dedefd1 authored May 19, 2010 by Jacob Pan Committed by H. Peter Anvin May 19, 2010

x86: detect scattered cpuid features earlier

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@linux.intel.com>
LKML-Reference: <1274295685-6774-2-git-send-email-jacob.jun.pan@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

parent 537b60d1

arch/x86/kernel/cpu/common.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -576,6 +576,7 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
	if (c->extended_cpuid_level >= 0x80000007)		if (c->extended_cpuid_level >= 0x80000007)
	c->x86_power = cpuid_edx(0x80000007);		c->x86_power = cpuid_edx(0x80000007);

			init_scattered_cpuid_features(c);
	}		}

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

	get_model_name(c); /* Default name */		get_model_name(c); /* Default name */

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