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x86: Fix override new_cpu_data.x86 with 486 

We should set X86 to 486 before use cpuid to detect the cpu type, if
we set X86 to 486 after cpuid, then we will get 486 until cpu_detect
runs.

Signed-off-by: Wang YanQing <udknight@gmail.com>
Link: http://lkml.kernel.org/r/20130628144516.GA2177@udknight
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
hifive-unleashed-5.1
Wang YanQing 2013-06-28 22:45:16 +08:00 committed by H. Peter Anvin
parent 62122fd7da
commit 237d154854
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/head_32.S
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@ -410,6 +410,7 @@ enable_paging:
/*
* Check if it is 486
*/
movb $4,X86 # at least 486
cmpl $-1,X86_CPUID
je is486
@ -437,7 +438,6 @@ enable_paging:
movl %edx,X86_CAPABILITY
is486:
movb $4,X86
movl $0x50022,%ecx # set AM, WP, NE and MP
movl %cr0,%eax
andl $0x80000011,%eax # Save PG,PE,ET