[Skiboot] Fast reboot functionality

[Artem Senichev]

Hi all,

I noticed that we have lost the the support of 'fast reboot' mode in
our VESNIN P8 servers.
Every reboot call from the host OS or petitboot console causes a full
boot cycle started from Hostboot.

OPAL says "Fast reboot timed out waiting for secondaries to call in".

What's the reason for this behavior? How can I fix it?

Stripped log from OPAL:
...
[  199.136112474,7] PHB62: Purging all IODA tables...
[  199.142710249,5] OPAL: Reboot request...
[  199.143130695,8] NVRAM: 'log-level-memory=9' (18)
[  199.143244038,8] NVRAM: 'log-level-driver=9' (18)
[  199.143310911,8] NVRAM: '' (0)
[  199.143358210,7] NVRAM: 'fast-reset' not found
[  199.143421327,5] RESET: Initiating fast reboot 1...
[  199.143495092,7] RESET: Resetting from cpu: 0x8 (core 0x1)
[  199.143574199,7] RESET Waking up core 0x1
[  199.143631612,8] RESET: Special wakeup complete after 1 us
[  199.143708792,7] RESET Waking up core 0x2
[  199.143764927,8] RESET: Special wakeup complete after 1 us
[  199.143846915,7] RESET Waking up core 0x4
...
[  199.147926899,8] RESET: Special wakeup complete after 1 us
[  199.148011989,7] RESET Waking up core 0xd
[  199.148072961,8] RESET: Special wakeup complete after 1 us
[  199.148151948,7] RESET: Stopping the world...
[  199.148627664,7] RESET: Resetting all threads but self...
[  199.148736943,7] RESET: CPU 0x000a reset in
[  199.148737873,7] RESET: CPU 0x000b reset in
[  199.148738889,7] RESET: CPU 0x000c reset in
[  199.148741119,7] RESET: CPU 0x000d reset in
...
[  199.149138628,7] RESET: CPU 0x0c6d reset in
[  199.149139615,7] RESET: CPU 0x0c6e reset in
[  199.149141154,7] RESET: CPU 0x0c6f reset in
[  200.149141935,5] RESET: Fast reboot timed out waiting for
secondaries to call in
[  200.149398335,6] IPMI: sending chassis control request 0x03
[  200.149630269,8] BT: seq 0x4a netfn 0x00 cmd 0x02: Message sent to host
[  200.387151050,8] BT: seq 0x4a netfn 0x00 cmd 0x02: IPMI MSG done
*end*

Best regards,
Artem Senichev
Software Engineer, YADRO.