Andrew Donnellan <andrew.donnel...@au1.ibm.com> writes: > skiboot now supports "fast reboot", a reboot procedure where skiboot > reinitialises hardware and loads a new kernel without re-IPLing the > machine. At present, fast reboot support is still experimental and is not > enabled by default, however it is intended that it will be enabled by > default in a near-future release. > > There may be some circumstances where the user wants to force a full IPL > reboot rather than using fast reboot. Add support for the > OPAL_REBOOT_FULL_IPL reboot type, enabled by writing 1 to > /sys/firmware/opal/force_full_ipl_reboot. On versions of skiboot that > implement the OPAL_REBOOT_FULL_IPL reboot type, this will force an IPL. On > versions that do not, print an error message on reboot and proceed with a > regular reboot (which could be a full IPL or a fast reboot).
Hi Andrew, Can I suggest: - Fix OPAL - Fix OPAL - Fix OPAL ... Oh OK, it's firmware :D There's existing logic in kernel/reboot.c to handle a reboot= command line parameter, which can set the reboot_mode, so my preference would be that we use that. Currently we completely ignore the reboot_mode, so there's no backward compatibility issue. It looks like the default is REBOOT_COLD, whatever that means. So I think we could define that on powernv REBOOT_HARD means "do a full IPL". Or we could use "force", which already exists, though I can't quite see what that actually means on x86. cheers
