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x86: cpu/common*.c, merge early_identify_cpu()

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Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-09-04 20:09:10 -07:00 committed by Ingo Molnar
parent 5122c890ba
commit 6627d24230
2 changed files with 20 additions and 3 deletions
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4
arch/x86/kernel/cpu/common.c
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@ -490,7 +490,11 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
*/
static void __init early_identify_cpu(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_X86_64
c->x86_clflush_size = 64;
#else
c->x86_clflush_size = 32;
#endif
c->x86_cache_alignment = c->x86_clflush_size;
if (!have_cpuid_p())

19
arch/x86/kernel/cpu/common_64.c
View File

@ -482,15 +482,28 @@ static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
#endif
}
/* Do some early cpuid on the boot CPU to get some parameter that are
needed before check_bugs. Everything advanced is in identify_cpu
below. */
/*
* Do minimum CPU detection early.
* Fields really needed: vendor, cpuid_level, family, model, mask,
* cache alignment.
* The others are not touched to avoid unwanted side effects.
*
* WARNING: this function is only called on the BP. Don't add code here
* that is supposed to run on all CPUs.
*/
static void __init early_identify_cpu(struct cpuinfo_x86 *c)
{
#ifdef CONFIG_X86_64
c->x86_clflush_size = 64;
#else
c->x86_clflush_size = 32;
#endif
c->x86_cache_alignment = c->x86_clflush_size;
if (!have_cpuid_p())
return;
memset(&c->x86_capability, 0, sizeof c->x86_capability);
c->extended_cpuid_level = 0;