Messages in this thread | | | Date | Sat, 10 Apr 2021 11:47:52 +0200 | From | Borislav Petkov <> | Subject | Re: [RFC 1/2] x86/tsc: add a timer to make sure tsc_adjust is always checked |
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On Sat, Apr 10, 2021 at 11:27:11AM +0200, Thomas Gleixner wrote: > On Tue, Mar 30 2021 at 16:25, Feng Tang wrote: > > Normally the tsc_sync will be checked every time system enters idle state, > > but there is still caveat that a system won't enter idle, either because > > it's too busy or configured purposely to not enter idle. Setup a periodic > > timer to make sure the check is always on. > > Bah. I really hate the fact that we don't have a knob to disable writes > to the TSC/TSC_ADJUST msrs. That would spare this business alltogether.
We have the MSR filtering and I'd *love* to add those MSRs to a permanent ban list of MSRs which will never ever be written to from luserspace.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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