From mboxrd@z Thu Jan  1 00:00:00 1970
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753370AbeAEWNE (ORCPT <rfc822;ralf@linux-mips.org> + 1 other);
        Fri, 5 Jan 2018 17:13:04 -0500
Received: from emh06.mail.saunalahti.fi ([62.142.5.116]:49200 "EHLO
        emh06.mail.saunalahti.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1753070AbeAEWNC (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 5 Jan 2018 17:13:02 -0500
X-Greylist: delayed 528 seconds by postgrey-1.27 at vger.kernel.org; Fri, 05 Jan 2018 17:13:02 EST
Date: Sat, 6 Jan 2018 00:04:12 +0200
From: Aaro Koskinen <aaro.koskinen@iki.fi>
To: Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org
Subject: [BISECTED] v4.15-rc: Boot regression on x86_64/AMD
Message-ID: <20180105220412.fzpwqe4zljdawr36@darkstar.musicnaut.iki.fi>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
User-Agent: NeoMutt/20170113 (1.7.2)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>

Hi,

After v4.14, I've been unable to boot my AMD compilation box with the
v4.15-rc mainline Linux. It just ends up in a silent reboot loop.

I bisected this to:

commit fa564ad9636651fd11ec2c79c48dee844066f73a
Author: Christian König <christian.koenig@amd.com>
Date:   Tue Oct 24 14:40:29 2017 -0500

    x86/PCI: Enable a 64bit BAR on AMD Family 15h (Models 00-1f, 30-3f, 60-7f)

System details:

[    0.000000] DMI: MSI MS-7699/760GA-P43(FX) (MS-7699)   , BIOS V1.3 10/14/2014
[...]
[    0.070000] smpboot: CPU0: AMD FX(tm)-6350 Six-Core Processor (family: 0x15, model: 0x2, stepping: 0x0)

If you need more info, please tell what you need.

With the current mainline (rc6+), I have done the following reverts to
get a bootable system:

    Revert "x86/PCI: Enable a 64bit BAR on AMD Family 15h (Models 00-1f, 30-3f, 
60-7f)"
    This reverts commit fa564ad9636651fd11ec2c79c48dee844066f73a.

    Revert "x86/PCI: Fix infinite loop in search for 64bit BAR placement"
    This reverts commit 470195f82e4ea550b7c37736a12bf3fa565295ea.

    Revert "x86/PCI: Only enable a 64bit BAR on single-socket AMD Family 15h"
    This reverts commit a19e2696135efb471981c1ae1ec3cb2b70c41a2e.

A.