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Date:   Fri, 21 Aug 2020 22:02:07 +0200
From:   Peter Zijlstra <>
Cc:     Thomas Gleixner <>,
        Paolo Bonzini <>,
        Borislav Petkov <>,
        Sean Christopherson <>,
        Andy Lutomirski <>,
        Ingo Molnar <>,,, Dave Hansen <>,
        Chang Seok Bae <>,
        Sasha Levin <>,,
        Tom Lendacky <>
Subject: Re: [PATCH] x86/entry/64: Disallow RDPID in paranoid entry if KVM is

On Fri, Aug 21, 2020 at 12:55:53PM -0700, wrote:

> It is hardly going to be a performance difference for paranoid entry,
> which is hopefully rare enough that it falls into the noise.

Try perf some day ;-)

But yeah, given the utter trainwreck that NMIs are anyway, this is all
not going to matter much.

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