On Tue, Apr 30, 2019 at 05:07:31PM -0700, Sodagudi Prasad wrote: > On 2019-04-30 14:44, Sodagudi Prasad wrote: > +Sudeep > > > Hi Mark/Will, > > > > I would like to understand whether ARM linux community have plans to > > support PSCI version 1.1 or not. > > PSCI_1_1 specification introduced support for SYSTEM_RESET2 command > > and this new command helps mobile devices to SYSTEM_WARM_RESET > > support. Rebooting devices with warm reboot helps to capture the > > snapshot of the ram contents for post-mortem analysis. > > I think, there is a recent discussion from Sudeep for the SYSTEM_RESET2 > support. > https://patchwork.kernel.org/patch/10884345/ >
This has landed in -next, and hopefully must appear in v5.2 > > Hi Sudeep, > > I was going through your discussion in the below list - > https://lore.kernel.org/lkml/d73d3580-4ec1-a281-4585-5c776fc08...@xilinx.com/ > > There is no provision to set up reboot mode dynamically instead kernel > command line parameter. > Looking for options to reboot device with warm reboot option when kernel > crashed. > > panic() --> emergency_restart() --> machine_emergency_restart() --> > machine_restart(NULL); > > It would nice if there is a config option to reboot the device either in > warm or cold in the case of kernel panic. I presume you prefer to do warm boot in case of panic to get a dump of the memory to inspect ? If so, is kexec/kdump not the mechanism to achieve that ? I am just trying to understand the use case. Xilinx asked for the same but never got to understand their use case. -- Regards, Sudeep
