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