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x86_32: always run the full set of paging state.

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I am preparing to convert the boot time page table to the kernels
native format.  To achieve that I need to enable PAE. Enabling PSE
and the no execute bit would not hurt.  So this patch modifies
the boot cpu path to execute all of the kernels enable code
if and only if we have the proper bits set in mmu_cr4_features.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Mika Penttilä <mika.penttila@kolumbus.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ian Campbell 2008-01-30 13:33:27 +01:00 committed by Ingo Molnar
parent 503595010f
commit 5756dd59f1
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kernel/head_32.S
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@ -221,6 +221,8 @@ ENTRY(startup_32_smp)
movl %eax,%es
movl %eax,%fs
movl %eax,%gs
#endif /* CONFIG_SMP */
3:
/*
* New page tables may be in 4Mbyte page mode and may
@ -267,8 +269,6 @@ ENTRY(startup_32_smp)
wrmsr
6:
#endif /* CONFIG_SMP */
3:
/*
* Enable paging