Messages in this thread | | | Date | Wed, 2 Sep 2020 18:45:38 +0200 | From | peterz@infradea ... | Subject | Re: [RFC PATCH] tools/x86: add kcpuid tool to show raw CPU features |
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On Thu, Aug 27, 2020 at 03:49:03PM +0800, Feng Tang wrote: > End users frequently want to know what features their processor > supports, independent of what the kernel supports. > > /proc/cpuinfo is great. It is omnipresent and since it is provided by > the kernel it is always as up to date as the kernel. But, it can be > ambiguous about processor features which can be disabled by the kernel > at boot-time or compile-time.
Let me once again suggest we use CPUID faulting to 'fix' this.
We really should clear the CPUID bits when the kernel explicitly disables things.
https://lkml.kernel.org/r/1552431636-31511-18-git-send-email-fenghua.yu@intel.com
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