linux-kernel - Re: Qemu crashes in -next due to 'of: remove *phandle properties from expanded device tree'

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Date:   Thu, 15 Jun 2017 16:48:40 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Guenter Roeck <linux@...ck-us.net>,
        Frank Rowand <frank.rowand@...y.com>
Cc:     linux-kernel@...r.kernel.org, Rob Herring <robh@...nel.org>
Subject: Re: Qemu crashes in -next due to 'of: remove *phandle properties from expanded device tree'

Guenter Roeck <linux@...ck-us.net> writes:

> Hi Frank,
>
> your commit 'of: remove *phandle properties from expanded device tree' in
> -next causes several of my ppc qemu tests to crash. Looking into qemu, it
> sets "linux,phandle" properties for the mpic and for other devices.

Yeah this broke ~50% of my machines.

Various back traces, or in some cases nothing at all.

cheers

eg:

   XICS: Cannot find a Source Controller !
   ------------[ cut here ]------------
   kernel BUG at arch/powerpc/sysdev/xics/xics-common.c:58!
   Oops: Exception in kernel mode, sig: 5 [#1]
   SMP NR_CPUS=2048 
   NUMA 
   pSeries
   Modules linked in:
   CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.12.0-rc5-gcc5-next-20170614-gb147461 #1
   task: c000000000eb1180 task.stack: c000000001084000
   NIP: c00000000008d780 LR: c00000000008d770 CTR: 0000000000000000
   REGS: c000000001087a40 TRAP: 0700   Tainted: G        W        (4.12.0-rc5-gcc5-next-20170614-gb147461)
   MSR: 8000000000021032 <SF,ME,IR,DR,RI>
     CR: 24000422  XER: 00000001
   CFAR: c0000000008dd280 SOFTE: 0 
   GPR00: c00000000008d770 c000000001087cc0 c000000001086400 0000000000000000 
   GPR04: 0000000000000000 0000000000000000 c000000000ad14c8 0000000000000002 
   GPR08: 0000000000000002 0000000000000001 0000000000000002 0000000000000000 
   GPR12: 0000000022000424 c000000006af0000 00000000054dd288 00000000054b5618 
   GPR16: 00000000054b5320 00000000054b59e8 000000000554dd20 0000000000000060 
   GPR20: 000000000462eea0 0000000001b56c80 0000000000000040 0000000000000000 
   GPR24: 0000000004814000 0000000005aa0028 0000000004814000 0000000005ab158e 
   GPR28: ffffffffd00dfeed c000000000e115e0 0000000000000000 c000000000eb54f4 
   NIP [c00000000008d780] .xics_update_irq_servers+0x40/0x140
   LR [c00000000008d770] .xics_update_irq_servers+0x30/0x140
   Call Trace:
   [c000000001087cc0] [c00000000008d770] .xics_update_irq_servers+0x30/0x140 (unreliable)
   [c000000001087d50] [c000000000db85f0] .xics_init+0x134/0x188
   [c000000001087dd0] [c000000000dbdc64] .pseries_init_irq+0x48/0x230
   [c000000001087e80] [c000000000da8dcc] .init_IRQ+0x3c/0x50
   [c000000001087ef0] [c000000000da44e4] .start_kernel+0x31c/0x528
   [c000000001087f90] [c00000000000b070] start_here_common+0x1c/0x4ac
   Instruction dump:
   f821ff71 60000000 60000000 3d02ffe3 38800000 3be8f0f4 e87f0002 4884fa85 
   60000000 7c690074 7c7e1b78 7929d182 <0b090000> e93f0002 3d02000b 3c82ffc2 
   ---[ end trace 523b05d3a02887f6 ]---