Messages in this thread |  | | Date | Sat, 3 Oct 2020 16:39:23 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 0/3] x86: Add initial support to discover Intel hybrid CPUs |
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On Sat, Oct 03, 2020 at 12:46:29PM +0200, Thomas Gleixner wrote: > > There might be some model specific performance counter events that only > > apply to some cores. Or a machine check error code that is logged in the > > model specific MSCOD field of IA32_MCi_STATUS. But any and all code can run > > on any core. > > Ok. The perf side should be doable, IIRC we already have something like > that, but Peter should know better.
Yes, ARM big.LITTLE has horrible hacks. Please look at them for inspiration.
Also, I once started (and never found time to finish)..
https://lkml.kernel.org/r/20181010104559.GO5728@hirez.programming.kicks-ass.net
Kan should be aware of all this.
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