[Qemu-devel] [Bug 1829576] Re: QEMU-SYSTEM-PPC64 Regression QEMU-4.0.0 - Ivan Warren via Qemu-devel

From: Ivan Warren via Qemu-devel <qemu-devel@nongnu.org>
To: qemu-devel@nongnu.org
Cc: Ivan Warren <ivan@vmfacility.fr>
Subject: [Qemu-devel] [Bug 1829576] Re: QEMU-SYSTEM-PPC64 Regression QEMU-4.0.0
Date: Sun, 19 May 2019 15:52:23 -0000	[thread overview]
Message-ID: <155828114316.15638.7357231494953184129.malone@wampee.canonical.com> (raw)
In-Reply-To: 155812687142.26079.4364411221525864419.malonedeb@soybean.canonical.com

Same thing here using https://github.com/dgibson/qemu/commits/ppc-
for-4.1 ... It might be a completely different problem (athough it looks
like a MMU problem).

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Title:
  QEMU-SYSTEM-PPC64 Regression QEMU-4.0.0

Status in QEMU:
  New

Bug description:
  I have been using QEMU-SYSTEM-PPC64 v3.1.0 to run CentOS7 PPC emulated
  system. It stopped working when I upgraded to QEMU-4.0.0 . I
  downgraded back to QEMU-3.1.0 and it started working again. The
  problem is that my CentOS7 image will not boot up udner QEMU-4.0.0,
  but works fine under QEMU-3.1.0.

  I have an QCOW2 image available at
  https://www.mediafire.com/file/d8dda05ro85whn1/linux-
  centos7-ppc64.qcow2/file . NOTE: It is 15GB. Kind of large.

  I run it as follows:

     qemu-system-ppc64 \
        -name "CENTOS7-PPC64" \
        -cpu POWER7 -machine pseries \
        -m 4096 \
        -netdev bridge,id=netbr0,br=br0 \
        -device e1000,netdev=netbr0,mac=52:54:3c:13:21:33 \
        -hda "./linux-centos7-ppc64.qcow2" \
        -monitor stdio

  HOST: I am using Manjaro Linux on an Intel i7 machine with the QEMU
  packages installed via the package manager of the distribution.

  [jsantiago@jlsws0 ~]$ uname -a
  Linux jlsws0.haivision.com 4.19.42-1-MANJARO #1 SMP PREEMPT Fri May 10 20:52:43 UTC 2019 x86_64 GNU/Linux

  jsantiago@jlsws0 ~]$ cpuinfo 
  Intel(R) processor family information utility, Version 2019 Update 3 Build 20190214 (id: b645a4a54)
  Copyright (C) 2005-2019 Intel Corporation.  All rights reserved.

  =====  Processor composition  =====
  Processor name    : Intel(R) Core(TM) i7-6700K  
  Packages(sockets) : 1
  Cores             : 4
  Processors(CPUs)  : 8
  Cores per package : 4
  Threads per core  : 2

  =====  Processor identification  =====
  Processor	Thread Id.	Core Id.	Package Id.
  0       	0   		0   		0   
  1       	0   		1   		0   
  2       	0   		2   		0   
  3       	0   		3   		0   
  4       	1   		0   		0   
  5       	1   		1   		0   
  6       	1   		2   		0   
  7       	1   		3   		0   
  =====  Placement on packages  =====
  Package Id.	Core Id.	Processors
  0   		0,1,2,3		(0,4)(1,5)(2,6)(3,7)

  =====  Cache sharing  =====
  Cache	Size		Processors
  L1	32  KB		(0,4)(1,5)(2,6)(3,7)
  L2	256 KB		(0,4)(1,5)(2,6)(3,7)
  L3	8   MB		(0,1,2,3,4,5,6,7)

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