Re: [PATCH v2 3/4] x86, head_32/64.S: Enable SMEP

[H. Peter Anvin]

On 05/17/2011 04:08 PM, Yu, Fenghua wrote:
>>
>> Are EFI runtime service pages currently set up appropriately?
> 
> They are not set up yet. efi init is called after this.
> 
> But at this time there is no user space code yet. So there is no SMEP violation chance until later when any user space page table is setup.
> 

Are EFI runtime pages set up with U=0?  I would argue it is a bug if
they aren't, but we want to make sure that there isn't such a bug.

	-hpa
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