From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Subject: Re: [BUG] ARM64: amlogic: gxbb: unhandled level 2 translation fault
 (11)
To: Neil Armstrong <narmstrong@baylibre.com>,
        Carlo Caione <carlo@caione.org>, Kevin Hilman <khilman@baylibre.com>
References: <20161224140028.4205-1-xypron.glpk@gmx.de>
 <478f1429-03f2-a944-8d47-3757a4d44a40@baylibre.com>
 <130a3716-a643-d14f-fd7c-9ad3bb67f3a7@gmx.de>
 <c9e66a1f-a53f-9993-dd15-5e566c5f46f0@baylibre.com>
 <c91b83af-0eb8-c519-3428-12f34b04d725@baylibre.com>
Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Message-ID: <e9dd4e98-683b-2643-124c-6b7f05d719f3@gmx.de>
Date: Fri, 30 Dec 2016 13:18:03 +0100
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On 12/30/2016 10:44 AM, Neil Armstrong wrote:
> On 12/30/2016 09:51 AM, Neil Armstrong wrote:
>> On 12/29/2016 10:18 PM, Heinrich Schuchardt wrote:
>>> On 12/29/2016 10:07 AM, Neil Armstrong wrote:
>>>> On 12/24/2016 03:00 PM, Heinrich Schuchardt wrote:
>>>>> When trying to run sddm on an Hardkernel Odroid C2 I invariably run into the
>>>>> translation fault below.
>>>>>
>>>>> The following mail thread relates this kind of problem to TLB (translation
>>>>> lookaside buffer) broadcasting.
>>>>>
>>>>> https://lkml.org/lkml/2014/4/15/207
>>>>>
>>>>> [ 3163.014263] sddm[1851]: unhandled level 2 translation fault (11) at 0x00000160, esr 0x82000006
>>>>> [ 3163.017287] pgd = ffff80007bf86000
>>>>> [ 3163.020589] [00000160] *pgd=000000007a8a3003
>>>>> [ 3163.024733] , *pud=000000007be9c003
>>>>> [ 3163.028095] , *pmd=0000000000000000
>>>>>
>>>>>
>>>>> [ 3163.033026] CPU: 1 PID: 1851 Comm: sddm Not tainted 4.9.0-next-20161212-r022-arm64 #1
>>>>> [ 3163.040831] Hardware name: Hardkernel ODROID-C2 (DT)
>>>>> [ 3163.045698] task: ffff80007bc6d780 task.stack: ffff80007c524000
>>>>> [ 3163.051563] PC is at 0x160
>>>>> [ 3163.054231] LR is at 0xffff9a9fbc98
>>>>> [ 3163.057686] pc : [<0000000000000160>] lr : [<0000ffff9a9fbc98>] pstate: 40000000
>>>>> [ 3163.065022] sp : 0000ffffd7180130
>>>>> [ 3163.068281] x29: 0000ffffd7180130 x28: 0000ffffd7180288 
>>>>> [ 3163.073538] x27: 0000ffff9aa94000 x26: 0000000000000001 
>>>>> [ 3163.078798] x25: 0000000000000000 x24: 0000ffffd7180410 
>>>>> [ 3163.084060] x23: 000000000e0c2190 x22: 000000000e0ca5c0 
>>>>> [ 3163.089322] x21: 0000ffff9ac35000 x20: 0000000000454fa9 
>>>>> [ 3163.094583] x19: 0000000000454fa8 x18: 000000000e0b5938 
>>>>> [ 3163.099843] x17: 0000ffff9a3f2988 x16: 0000ffff9ac36aa0 
>>>>> [ 3163.105105] x15: 0000000000000000 x14: 0000000000000000 
>>>>> [ 3163.110367] x13: 6d00640064007300 x12: 0800000005000000 
>>>>> [ 3163.115627] x11: 0000040000000000 x10: 0000a00000000000 
>>>>> [ 3163.120889] x9 : 00003fffffffffff x8 : 0000000000000000 
>>>>> [ 3163.126150] x7 : 000000000e0cb520 x6 : 0000000000454fc0 
>>>>> [ 3163.131412] x5 : 0000ffffd717ffd8 x4 : 000000000e0cb510 
>>>>> [ 3163.136680] x3 : 0000000000000004 x2 : f2f9022b551b3900 
>>>>> [ 3163.141935] x1 : 0000000000000160 x0 : 000000000e0ca5c0 
>>>>>
>>>>> Best regards
>>>>>
>>>>> Heinrich Schuchardt
>>>>
>>>> Hi Heinrich,
>>>>
>>>> I personally never had this issue even while loading huge applications loke LibreOffice and Gnome environment.
>>>>
>>>> I will have a look and try to reproduce this issue, can you provide us your configuration and user-space complete use case ?
>>>>
>>>> Neil
>>>>
>>>
>>> Hello Neil,
>>>
>>> the kernel is build with
>>> https://github.com/xypron/kernel-odroid-c2/tree/f8d565ff755e92fd585f5ae10123ce20abe03968
>>>
>>> Especially look at the patch directory and config/config-next-20161212.
>>>
>>> The userland is Debian Stretch with this package:
>>> https://packages.debian.org/stretch/sddm
>>>
>>> The link
>>> https://www.spinics.net/lists/arm-kernel/msg550204.html
>>> that you mention in a separate mail just links to this very thread due
>>> to linux-arm-kernel@lists.infradead.org being in copy.
>>>
>>> Best regards
>>>
>>> Heinrich Schuchardt
>>>
>>
>> Hi,
>>
>> Thanks for the details, but why do you use the next-20161212 tag ? does it work with 4.10-rc1 or previous next tags ?
>>
>> Neil
>>
> 
> Hi Heinrich,
> 
> I'm able to reproduce the bug using SDMM from Ubuntu running a 4.10-rc1 patched with memory zones :
> [   17.988446] sddm-greeter[2366]: unhandled level 2 translation fault (11) at 0x00000000, esr 0x92000006
> [   17.988451] pgd = ffff80003c3ee000
> [   17.988472] [00000000] *pgd=00000000398bd003
> [   17.988474] , *pud=00000000398bf003
> [   17.990477] , *pmd=0000000000000000
> 
> 
> [   17.990485] CPU: 3 PID: 2366 Comm: sddm-greeter Not tainted 4.10.0-rc1-00004-gd3f812382-dirty #488
> [   17.990487] Hardware name: Amlogic Meson GXBB P200 Development Board (DT)
> [   17.990489] task: ffff80003c160000 task.stack: ffff80003c314000
> [   17.990493] PC is at 0xffffb2999994
> [   17.990495] LR is at 0xffffb299f774
> [   17.990497] pc : [<0000ffffb2999994>] lr : [<0000ffffb299f774>] pstate: 20000000
> [   17.990503] sp : 0000ffffd2d1d5b0
> [   17.990504] x29: 0000ffffd2d1d5b0 x28: 0000ffffad10e010
> [   17.990508] x27: 0000000009c376d0 x26: 0000000000000001
> [   17.990511] x25: 0000ffffb2b67000 x24: 0000ffffad10e010
> [   17.990514] x23: 0000000000000000 x22: 0000000000000000
> [   17.990517] x21: 0000000009c376d0 x20: 0000ffffb2fcdcb8
> [   17.990520] x19: 0000ffffb2b2b000 x18: 0000000009c78450
> [   17.990523] x17: 0000ffffb2b68068 x16: 0000ffffb2022158
> [   17.990526] x15: 0000ffffb2fcd000 x14: 0000000000000000
> [   17.990529] x13: aaaaaaaaaaaaaaab x12: 0000000000010000
> [   17.990532] x11: 0000000000000008 x10: 0000000009c3b980
> [   17.990535] x9 : 0000000009c38c40 x8 : 0000ffffd2d1d4e0
> [   17.990538] x7 : 0000000000000000 x6 : 0000000009c3b998
> [   17.990541] x5 : 0000000009c3b980 x4 : 0000800000000000
> [   17.990544] x3 : 00000000fffffff0 x2 : 0000ffffad10e010
> [   17.990547] x1 : 0000000009c379d8 x0 : 0000000000000000
> 
> Looking about other occurrence of such error, it seems it may be a issue from sdmm instead.
> 
> I'll continue searching,
> Neil
> 
> 
Hello Neil,

I am seeing a simular error when I try to use x2go

to have a remote desktop on the Odroid C2.

[47912.997112] fuse init (API version 7.26)
[47913.405815] x2goagent[28395]: unhandled level 0 translation fault
(11) at 0x3042415a74614c, esr 0x82000004
[47913.409849] pgd = ffff800079a11000
[47913.413704] [3042415a74614c] *pgd=0000000000000000


[47913.420673] CPU: 1 PID: 28395 Comm: x2goagent Not tainted
4.9.0-next-20161212-r024-arm64 #1
[47913.428992] Hardware name: Hardkernel ODROID-C2 (DT)
[47913.433906] task: ffff80007c670000 task.stack: ffff800079e6c000
[47913.439747] PC is at 0x3042415a74614c
[47913.443400] LR is at 0x323042415a74614c
[47913.447194] pc : [<003042415a74614c>] lr : [<323042415a74614c>]
pstate: 80000000
[47913.454528] sp : 0000ffffd7240140
[47913.457789] x29: 313042414c74614c x28: 000000000000007f
[47913.463016] x27: 000000000000007f x26: 0000000000000001
[47913.468278] x25: 0000000000000000 x24: 0000aaaaee52a7e0
[47913.473540] x23: 0000ffffd7240310 x22: 363042414274614c
[47913.478800] x21: 353042415674614c x20: 343042414374614c
[47913.484061] x19: 333042415874614c x18: 0000000000000000
[47913.489324] x17: 0000ffffb1ce2da0 x16: 0000000000000000
[47913.494589] x15: 0000000000000434 x14: 000000000000001f
[47913.499852] x13: 0000aaaa00703f00 x12: 0000003ff8081fff
[47913.505114] x11: 0000000000000000 x10: 0000000000000002
[47913.510373] x9 : 0000000000000010 x8 : 0000000000000042
[47913.515633] x7 : 011cff0800001fff x6 : 0000022300090101
[47913.520904] x5 : 000000000000088c x4 : 0000000000000007
[47913.526158] x3 : 0000aaaae52c1db0 x2 : 0000aaaae573a5a0
[47913.531417] x1 : 0000000000000000 x0 : 0000000000000000

Best regards

Heinrich Schuchardt