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Date:   Sat, 24 Dec 2016 15:00:28 +0100
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Carlo Caione <carlo@...one.org>,
        Kevin Hilman <khilman@...libre.com>
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [BUG] ARM64: amlogic: gxbb: unhandled level 2 translation fault (11)

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

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