Messages in this thread Patch in this message | | | From | Ian Campbell <> | Date | Mon, 21 Jan 2008 22:15:20 +0000 | Subject | [PATCH] 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: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Mika Penttilä <mika.penttila@kolumbus.fi> --- arch/x86/kernel/head_32.S | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 7b9b256..a2b6331 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -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 -- 1.5.3.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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