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Date:   Fri, 24 Nov 2017 14:43:40 +0100
From:   Peter Zijlstra <>
To:     Ingo Molnar <>
        Dave Hansen <>,
        Andy Lutomirski <>,
        Thomas Gleixner <>,
        "H . Peter Anvin" <>, Borislav Petkov <>,
        Linus Torvalds <>
Subject: Re: [PATCH 28/43] x86/mm/kaiser: Map CPU entry area

On Fri, Nov 24, 2017 at 10:14:33AM +0100, Ingo Molnar wrote:
> + 	/* CPU 0's mapping is done in kaiser_init() */
> +	if (cpu)
> +		kaiser_add_mapping_cpu_entry(cpu);

This hard assumes CPU0 is the boot CPU. I know we dropped Voyager
support a while back, but can/should we hard rely on that?

We do have __boot_cpu_id / get_boot_cpu_id() for these here things.

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