Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp616501ybi;
        Fri, 14 Jun 2019 00:03:11 -0700 (PDT)
X-Google-Smtp-Source: APXvYqwpc0XvayaZArQkKQTkt9Z7x/1TPpGQdxs0NGJHtRArBtU37Lg3c1gJNBnth+j8GTQEBF8Q
X-Received: by 2002:aa7:914e:: with SMTP id 14mr45686827pfi.136.1560495791346;
        Fri, 14 Jun 2019 00:03:11 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1560495791; cv=none;
        d=google.com; s=arc-20160816;
        b=efP+suPU2aiB1SrYfj3koqSYaXiNl069Fj/M6wWalDF7/ga+Mhm7MG8uGfJVLCYs0I
         7IUh1zdGXnu54EOfyyR36N8m9JdxeyxFQ9JIuPa7ulDLWYh8lCp8Zg9xg1XRvEYSQ8em
         1ZMmhjOznfJa8uIaX0ACsYV7Tbph/+ju0k6OO6QMSAiGIanaz7jOSdbLg2qVgbBKoNUw
         qBufOrLN26iX960du+iHbRFy5wTQ49GoY+JXGCsPFxBMQFv9d0BKFCllPlFTAwEI6NE0
         33mMXhEO23pRkfoxiP7cia+c/iGaJ7oOnCx6lEika3B8b604umMlbJNMX3v+O2OAw3lC
         QiKA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:sender:user-agent:content-disposition
         :mime-version:message-id:subject:cc:to:from:date:dkim-signature;
        bh=CL9TguztKtV2o3ivNkFUSAfdpXkC0b7RTHVi2QXvc2Y=;
        b=XZr27fZxfJ7EYBFhUGTCiezXFRg2IKCB14So9pxH8VbJK6HyCOYNilY6vdmlR8SnsU
         wRD90rdOTedZAAR0TNOofcr/pA5hYxZVi9H287XxcRT/+XtM7NWdz/SlsCP4RxsvM8US
         qkxs1xAQ8T6zD72dTUyy5eMbzHbcQS7HXQO5OV63WZXOpU4si87CG+UYstHBivp1uLNI
         zvpRiy6FcDWBzLs4DH7gaK7lT9vgAFwlOJxkr9CVpynjfC3gwpsmeDcZIVZozhIgKWOD
         XxLbWpsCFGPUN5rQ2irHCvqGsouutnm4oM3atjbXbB8Ac8z9rLY5TP0wecXrYyGcChYS
         aOMQ==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=fail (test mode) header.i=@xen0n.name header.s=mail header.b=gMVMFGjQ;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67])
        by mx.google.com with ESMTP id k193si1787507pgc.473.2019.06.14.00.02.52;
        Fri, 14 Jun 2019 00:03:11 -0700 (PDT)
Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Authentication-Results: mx.google.com;
       dkim=fail (test mode) header.i=@xen0n.name header.s=mail header.b=gMVMFGjQ;
       spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1726126AbfFNHCV (ORCPT <rfc822;0330sisy@gmail.com> + 99 others);
        Fri, 14 Jun 2019 03:02:21 -0400
Received: from [115.28.160.31] ([115.28.160.31]:33790 "EHLO
        mailbox.box.xen0n.name" rhost-flags-FAIL-FAIL-OK-OK)
        by vger.kernel.org with ESMTP id S1725780AbfFNHCV (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 14 Jun 2019 03:02:21 -0400
X-Greylist: delayed 414 seconds by postgrey-1.27 at vger.kernel.org; Fri, 14 Jun 2019 03:02:19 EDT
Received: from ld50 (unknown [116.227.76.7])
        (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
        (No client certificate requested)
        by mailbox.box.xen0n.name (Postfix) with ESMTPSA id 49A406011D;
        Fri, 14 Jun 2019 14:55:23 +0800 (CST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=xen0n.name; s=mail;
        t=1560495323; bh=KIsjpnrc1kWTp5mngPR3Kyeg7MjoHz37JvngBJKfgLc=;
        h=Date:From:To:Cc:Subject:From;
        b=gMVMFGjQp+7oPQFpt+QkMFgKOYBR7sQOKe1S/hD3ZFWtuwUqQrMOHH5TTZIThER98
         rcwnX4kWid+KtKsLH6btPuQ0HU+NInL7eFyQM32DRDT+gLdrKa/yeyS2M9MaoMLd9z
         AXUy1bgNk7f3AWGkjJ/XgYhiupgXhdG4amz84lzQ=
Date:   Fri, 14 Jun 2019 14:55:18 +0800
From:   WANG Xuerui <kernel@xen0n.name>
To:     linux-kernel@vger.kernel.org
Cc:     linux-mips@vger.kernel.org
Subject: DMI: support for non-EFI platforms with non-standard SMBIOS
 entrypoint?
Message-ID: <20190614065518.GA53855@ld50>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
User-Agent: Mutt/1.12.0 (2019-05-25)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi,

There are several MIPS platforms floating around with firmware SMBIOS
support, primarily Loongson 3-series, but their SMBIOS entrypoint is
non-standard.  According to the SMBIOS spec the non-EFI platforms should
have the tables in the 000F_0000h-000F_FFFFh physical range, however
these boards put the table at 0FFF_E000h.

How do we enable DMI for these non-EFI yet non-standard-compliant
systems without resorting to firmware fixing, which is not always
feasible?  It is possible to move the address definition to arch realm
with the standard value as default, but I would like to first ask for
suggestions, as I am fairly new to kernel development (personal hobby
for now).

Regards,

Xuerui