linux-kernel - Re: [tip:x86/apic] x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping

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Message-ID: <alpine.DEB.2.20.1610071448590.19804@nanos>
Date:   Fri, 7 Oct 2016 14:50:07 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Dou Liyang <douly.fnst@...fujitsu.com>
cc:     Yinghai Lu <yinghai@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        "linux-tip-commits@...r.kernel.org" 
        <linux-tip-commits@...r.kernel.org>,
        Tony Luck <tony.luck@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "lenb@...nel.org" <lenb@...nel.org>,
        "Zheng, Lv" <lv.zheng@...el.com>, robert.moore@...el.com,
        linux-acpi@...r.kernel.org
Subject: Re: [tip:x86/apic] x86/acpi: Introduce persistent storage for cpuid
 <-> apicid mapping

On Fri, 7 Oct 2016, Dou Liyang wrote:
> Is it possible that the "-1/oxffffffff" could appear in the MADT which is one
> of the ACPI tables?

According to the SDM the x2apic id is a 32bit ID, so 0xffffffff is a
legitimate value.

Thanks,

	tglx