Re: [v6] powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform

On Fri, 2015-06-05 at 08:01 +1000, Michael Ellerman wrote:

On Thu, 2015-04-06 at 12:03:17 UTC, Vipin K Parashar wrote:

quoted

This patch adds support for FSP (Flexible Service Processor)
EPOW (Early Power Off Warning) and DPO (Delayed Power Off) events for
the PowerNV platform. EPOW events are generated by FSP due to various
critical system conditions that require system shutdown. A few examples
of these conditions are high ambient temperature or system running on
UPS power with low UPS battery. DPO event is generated in response to
admin initiated system shutdown request. Upon receipt of EPOW and DPO
events the host kernel invokes orderly_poweroff() for performing
graceful system shutdown.

Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Vaibhav Jain <redacted>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Vipin K Parashar <redacted>

Hi Vipin,

And on my Tuleta I get:

opal-power: OPAL EPOW, DPO support detected.
opal-power: Existing EPOW event detected.
reboot: Failed to start orderly shutdown: forcing the issue
------------[ cut here ]------------
WARNING: at kernel/workqueue.c:818
Modules linked in:
CPU: 3 PID: 26 Comm: migration/3 Not tainted 4.1.0-rc3-13669-g704921b #80
task: c000000ff1745440 ti: c000000ff17ac000 task.ti: c000000ff17ac000
NIP: c0000000000ba48c LR: c0000000000ba430 CTR: c0000000000dbac0
REGS: c000000ff17af7d0 TRAP: 0700   Not tainted  (4.1.0-rc3-13669-g704921b)
MSR: 9000000100029033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 20000044  XER: 00000000
CFAR: c0000000000ba44c SOFTE: 0 
GPR00: c0000000000cec7c c000000ff17afa50 c000000000d7ce20 c000000ff160fcc0 
GPR04: 0000000000000000 0000000000000000 c000000000e10468 0000000000000000 
GPR08: c000000000d2ce20 c000000ff90dd400 0000000000000001 c000000ff901dc98 
GPR12: 0000000040000082 c000000001dc0d80 c0000000000c0b18 c000000ff817a540 
GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000ff8380000 
GPR24: c000000000c9dc00 c000000000daa8e0 c000000ff901dc00 0000000000000000 
GPR28: 0000000000000004 c000000ff174ae04 c000000ff901dc00 0000000000000000 
NIP [c0000000000ba48c] wq_worker_waking_up+0x7c/0xa0
LR [c0000000000ba430] wq_worker_waking_up+0x20/0xa0
Call Trace:
[c000000ff17afa50] [c000000ff1749bc0] 0xc000000ff1749bc0 (unreliable)
[c000000ff17afa80] [c0000000000cec7c] ttwu_do_activate.constprop.76+0x6c/0xa0
[c000000ff17afab0] [c0000000000d2958] try_to_wake_up+0x208/0x4a0
[c000000ff17afb30] [c0000000000eab94] __wake_up_common+0x84/0xf0
[c000000ff17afb90] [c0000000000eb744] complete+0x54/0x90
[c000000ff17afbd0] [c00000000014bac4] cpu_stop_signal_done+0x54/0x70
[c000000ff17afbf0] [c00000000014c324] cpu_stopper_thread+0xd4/0x1f0
[c000000ff17afd20] [c0000000000c5b20] smpboot_thread_fn+0x280/0x290
[c000000ff17afd80] [c0000000000c0c18] kthread+0x108/0x130
[c000000ff17afe30] [c00000000000956c] ret_from_kernel_thread+0x5c/0x70
Instruction dump:
7d00512d 40c2fff4 38210030 e8010010 ebe1fff8 7c0803a6 4e800020 60000000 
60420000 3d02fffb 8948db7e 694a0001 <0b0a0000> 2faa0000 41feffbc 39400001 
---[ end trace de25982dcf3cffd9 ]---
reboot: Power down


cheers