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Date:   Mon, 1 Apr 2019 09:33:52 +0200
From:   Borislav Petkov <>
To:     Paolo Bonzini <>
Cc:     LKML <>,
        Nadav Amit <>,
        Andy Lutomirski <>,
        Peter Zijlstra <>,
        "H. Peter Anvin" <>, Ingo Molnar <>,
        Joerg Roedel <>,,
        Radim Krčmář <>,
        Thomas Gleixner <>,
Subject: Re: [PATCH 3/5] x86/kvm: Convert some slow-path static_cpu_has()
 callers to boot_cpu_has()

On Mon, Apr 01, 2019 at 09:24:06AM +0200, Paolo Bonzini wrote:
> The MSR reads and writes are not done in the common case.  Also, you
> cannot really expect boot_cpu_data to be in L1 in these functions since
> they run after the guest---or if they do, each L1 line you fill in with
> host data is one line you "steal" from the guest.

Ok, fair enough. I'll drop this patch.


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