linux-kernel - Re: [PATCH v4 06/13] x86/platform/uv: Add and Decode Arch Type in UVsystab

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Date:   Mon, 5 Oct 2020 14:35:58 -0700
From:   Mike Travis <mike.travis@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Steve Wahl <steve.wahl@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernel test robot <lkp@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Russ Anderson <russ.anderson@....com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Jian Cai <caij2003@...il.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v4 06/13] x86/platform/uv: Add and Decode Arch Type in
 UVsystab



On 10/5/2020 2:21 PM, Borislav Petkov wrote:
> On Mon, Oct 05, 2020 at 03:39:22PM -0500, Mike Travis wrote:
>> A patch to add and process the UV Arch Type field in the UVsystab passed
>> from UV BIOS to the kernel.
> 
> What does that mean?
> 

There have been recent cases where OEM's want to use the OEM_ID in the 
ACPI tables to brand their own product.  The UV BIOS used that field to 
tell the Linux kernel which UV arch the running system is.  The Arch 
Type in the UVsystab (also created by UV BIOS) now carries that field in 
systems that support it.