Messages in this thread |  | | Date | Mon, 27 Nov 2017 12:47:56 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [patch V2 1/5] x86/kaiser: Respect disabled CPU features |
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On Mon, 27 Nov 2017, Peter Zijlstra wrote: > On Mon, Nov 27, 2017 at 12:14:04AM +0100, Thomas Gleixner wrote: > > PAGE_NX and PAGE_GLOBAL might be not supported or disabled on the command > > line, but KAISER sets them unconditionally. > > So KAISER is x86_64 only, right? AFAIK there is no x86_64 without NX > support. So would it not make sense to mandate NX for KAISER?, that is > instead of making "noexec" + KAISER work, make "noexec" kill KAISER + > emit a warning.
OTOH, disabling NX is a simple way to verify that DEBUG_WX works correctly also on the shadow maps.
But surely we can drop the PAGE_GLOBAL thing, as all 64bit systems have it.
Thanks,
tglx
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