Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [RFC PATCH] Use feature bit names in clearcpuid= | Date | Tue, 22 Sep 2020 10:03:03 +0200 |
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On Sun, Sep 20 2020 at 17:42, Borislav Petkov wrote: > Hi, > > so tglx hates this clearcpuid= interface where you have to give the > X86_FEATURE array indices in order to disable a feature bit for testing. > Below is a first attempt (lightly tested in a VM only) to accept the bit > names from /proc/cpuinfo too. > > I say "too" because not all feature bits have names and we would still > have to support the numbers. Yeah, yuck. > > An exemplary cmdline would then be something like: > > clearcpuid=de,440,smca,succory,bmi1,3dnow ("succory" is wrong on > purpose). > > and it says: > > [ 0.000000] Clearing CPUID bits: de 13:24 smca bmi1 3dnow > > Also, I'm thinking we should taint the kernel when this option is used. > > Thoughts?
Yes, instead of making it differently horrible, can we finally remove that nonsense which should have never been there in the first place?
Thanks,
tglx
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