Messages in this thread | | | Date | Tue, 17 May 2011 16:12:53 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v2 3/4] x86, head_32/64.S: Enable SMEP |
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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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